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"../../../node_modules/lodash/_coreJsData.js", "../../../node_modules/lodash/_isMasked.js", "../../../node_modules/lodash/_toSource.js", "../../../node_modules/lodash/_baseIsNative.js", "../../../node_modules/lodash/_getValue.js", "../../../node_modules/lodash/_getNative.js", "../../../node_modules/lodash/_Map.js", "../../../node_modules/lodash/_nativeCreate.js", "../../../node_modules/lodash/_hashClear.js", "../../../node_modules/lodash/_hashDelete.js", "../../../node_modules/lodash/_hashGet.js", "../../../node_modules/lodash/_hashHas.js", "../../../node_modules/lodash/_hashSet.js", "../../../node_modules/lodash/_Hash.js", "../../../node_modules/lodash/_mapCacheClear.js", "../../../node_modules/lodash/_isKeyable.js", "../../../node_modules/lodash/_getMapData.js", "../../../node_modules/lodash/_mapCacheDelete.js", "../../../node_modules/lodash/_mapCacheGet.js", "../../../node_modules/lodash/_mapCacheHas.js", "../../../node_modules/lodash/_mapCacheSet.js", "../../../node_modules/lodash/_MapCache.js", "../../../node_modules/lodash/_stackSet.js", "../../../node_modules/lodash/_Stack.js", "../../../node_modules/lodash/_setCacheAdd.js", "../../../node_modules/lodash/_setCacheHas.js", "../../../node_modules/lodash/_SetCache.js", "../../../node_modules/lodash/_arraySome.js", "../../../node_modules/lodash/_cacheHas.js", "../../../node_modules/lodash/_equalArrays.js", "../../../node_modules/lodash/_Uint8Array.js", "../../../node_modules/lodash/_mapToArray.js", "../../../node_modules/lodash/_setToArray.js", "../../../node_modules/lodash/_equalByTag.js", "../../../node_modules/lodash/_arrayPush.js", "../../../node_modules/lodash/isArray.js", "../../../node_modules/lodash/_baseGetAllKeys.js", "../../../node_modules/lodash/_arrayFilter.js", "../../../node_modules/lodash/stubArray.js", "../../../node_modules/lodash/_getSymbols.js", "../../../node_modules/lodash/_baseTimes.js", "../../../node_modules/lodash/isObjectLike.js", 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"../../../node_modules/lodash/_Set.js", "../../../node_modules/lodash/_WeakMap.js", "../../../node_modules/lodash/_getTag.js", "../../../node_modules/lodash/_baseIsEqualDeep.js", "../../../node_modules/lodash/_baseIsEqual.js", "../../../node_modules/lodash/isEqual.js", "../../../node_modules/lodash/_arrayEach.js", "../../../node_modules/lodash/_defineProperty.js", "../../../node_modules/lodash/_baseAssignValue.js", "../../../node_modules/lodash/_assignValue.js", "../../../node_modules/lodash/_copyObject.js", "../../../node_modules/lodash/_baseAssign.js", "../../../node_modules/lodash/_nativeKeysIn.js", "../../../node_modules/lodash/_baseKeysIn.js", "../../../node_modules/lodash/keysIn.js", "../../../node_modules/lodash/_baseAssignIn.js", "../../../node_modules/lodash/_cloneBuffer.js", "../../../node_modules/lodash/_copyArray.js", "../../../node_modules/lodash/_copySymbols.js", "../../../node_modules/lodash/_getPrototype.js", "../../../node_modules/lodash/_getSymbolsIn.js", 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"../../livelink.base/sources/scene/Scene.ts", "../sources/inactivity.ts", "../sources/nodeSocketGuard.ts", "../sources/Livelink.ts", "../sources/AgentEvents.ts", "../sources/Agent.ts", "../sources/data/util/channel.ts", "../sources/data/transports/PlaybackTransport.ts", "../sources/data/transports/MqttTransport.ts", "../sources/data/transports/AzureEventHubTransport.ts", "../sources/data/transports/OpcUaClientModule.ts", "../sources/data/transports/OpcUaTransport.ts", "../sources/data/transports/TransportRegistry.ts", "../sources/data/EventMapping.ts", "../sources/data/util/reporting.ts", "../sources/data/resolvers/EntityResolver.ts", "../sources/data/resolvers/ExistingEntityResolver.ts", "../sources/data/resolvers/SpawningEntityResolver.ts", "../sources/data/apply/ComponentPatchApplier.ts", "../sources/data/SchemaValidator.ts", "../sources/data/IngestionStats.ts", "../sources/data/IngestionPipeline.ts", "../sources/ObservedEventTarget.ts", "../sources/data/SceneIngestionEvents.ts", "../sources/data/SceneIngestion.ts"], "sourcesContent": ["/**\n * Removes all key-value entries from the list cache.\n *\n * @private\n * @name clear\n * @memberOf ListCache\n */\nfunction listCacheClear() {\n this.__data__ = [];\n this.size = 0;\n}\n\nmodule.exports = listCacheClear;\n", "/**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\nfunction eq(value, other) {\n return value === other || (value !== value && other !== other);\n}\n\nmodule.exports = eq;\n", "var eq = require('./eq');\n\n/**\n * Gets the index at which the `key` is found in `array` of key-value pairs.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} key The key to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction assocIndexOf(array, key) {\n var length = array.length;\n while (length--) {\n if (eq(array[length][0], key)) {\n return length;\n }\n }\n return -1;\n}\n\nmodule.exports = assocIndexOf;\n", "var assocIndexOf = require('./_assocIndexOf');\n\n/** Used for built-in method references. */\nvar arrayProto = Array.prototype;\n\n/** Built-in value references. */\nvar splice = arrayProto.splice;\n\n/**\n * Removes `key` and its value from the list cache.\n *\n * @private\n * @name delete\n * @memberOf ListCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction listCacheDelete(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n return false;\n }\n var lastIndex = data.length - 1;\n if (index == lastIndex) {\n data.pop();\n } else {\n splice.call(data, index, 1);\n }\n --this.size;\n return true;\n}\n\nmodule.exports = listCacheDelete;\n", "var assocIndexOf = require('./_assocIndexOf');\n\n/**\n * Gets the list cache value for `key`.\n *\n * @private\n * @name get\n * @memberOf ListCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction listCacheGet(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n return index < 0 ? undefined : data[index][1];\n}\n\nmodule.exports = listCacheGet;\n", "var assocIndexOf = require('./_assocIndexOf');\n\n/**\n * Checks if a list cache value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf ListCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction listCacheHas(key) {\n return assocIndexOf(this.__data__, key) > -1;\n}\n\nmodule.exports = listCacheHas;\n", "var assocIndexOf = require('./_assocIndexOf');\n\n/**\n * Sets the list cache `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf ListCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the list cache instance.\n */\nfunction listCacheSet(key, value) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n ++this.size;\n data.push([key, value]);\n } else {\n data[index][1] = value;\n }\n return this;\n}\n\nmodule.exports = listCacheSet;\n", "var listCacheClear = require('./_listCacheClear'),\n listCacheDelete = require('./_listCacheDelete'),\n listCacheGet = require('./_listCacheGet'),\n listCacheHas = require('./_listCacheHas'),\n listCacheSet = require('./_listCacheSet');\n\n/**\n * Creates an list cache object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction ListCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `ListCache`.\nListCache.prototype.clear = listCacheClear;\nListCache.prototype['delete'] = listCacheDelete;\nListCache.prototype.get = listCacheGet;\nListCache.prototype.has = listCacheHas;\nListCache.prototype.set = listCacheSet;\n\nmodule.exports = ListCache;\n", "var ListCache = require('./_ListCache');\n\n/**\n * Removes all key-value entries from the stack.\n *\n * @private\n * @name clear\n * @memberOf Stack\n */\nfunction stackClear() {\n this.__data__ = new ListCache;\n this.size = 0;\n}\n\nmodule.exports = stackClear;\n", "/**\n * Removes `key` and its value from the stack.\n *\n * @private\n * @name delete\n * @memberOf Stack\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction stackDelete(key) {\n var data = this.__data__,\n result = data['delete'](key);\n\n this.size = data.size;\n return result;\n}\n\nmodule.exports = stackDelete;\n", "/**\n * Gets the stack value for `key`.\n *\n * @private\n * @name get\n * @memberOf Stack\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction stackGet(key) {\n return this.__data__.get(key);\n}\n\nmodule.exports = stackGet;\n", "/**\n * Checks if a stack value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Stack\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction stackHas(key) {\n return this.__data__.has(key);\n}\n\nmodule.exports = stackHas;\n", "/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\nmodule.exports = freeGlobal;\n", "var freeGlobal = require('./_freeGlobal');\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\nmodule.exports = root;\n", "var root = require('./_root');\n\n/** Built-in value references. */\nvar Symbol = root.Symbol;\n\nmodule.exports = Symbol;\n", "var Symbol = require('./_Symbol');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\nfunction getRawTag(value) {\n var isOwn = hasOwnProperty.call(value, symToStringTag),\n tag = value[symToStringTag];\n\n try {\n value[symToStringTag] = undefined;\n var unmasked = true;\n } catch (e) {}\n\n var result = nativeObjectToString.call(value);\n if (unmasked) {\n if (isOwn) {\n value[symToStringTag] = tag;\n } else {\n delete value[symToStringTag];\n }\n }\n return result;\n}\n\nmodule.exports = getRawTag;\n", "/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\nfunction objectToString(value) {\n return nativeObjectToString.call(value);\n}\n\nmodule.exports = objectToString;\n", "var Symbol = require('./_Symbol'),\n getRawTag = require('./_getRawTag'),\n objectToString = require('./_objectToString');\n\n/** `Object#toString` result references. */\nvar nullTag = '[object Null]',\n undefinedTag = '[object Undefined]';\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nfunction baseGetTag(value) {\n if (value == null) {\n return value === undefined ? undefinedTag : nullTag;\n }\n return (symToStringTag && symToStringTag in Object(value))\n ? getRawTag(value)\n : objectToString(value);\n}\n\nmodule.exports = baseGetTag;\n", "/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n var type = typeof value;\n return value != null && (type == 'object' || type == 'function');\n}\n\nmodule.exports = isObject;\n", "var baseGetTag = require('./_baseGetTag'),\n isObject = require('./isObject');\n\n/** `Object#toString` result references. */\nvar asyncTag = '[object AsyncFunction]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n proxyTag = '[object Proxy]';\n\n/**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\nfunction isFunction(value) {\n if (!isObject(value)) {\n return false;\n }\n // The use of `Object#toString` avoids issues with the `typeof` operator\n // in Safari 9 which returns 'object' for typed arrays and other constructors.\n var tag = baseGetTag(value);\n return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n}\n\nmodule.exports = isFunction;\n", "var root = require('./_root');\n\n/** Used to detect overreaching core-js shims. */\nvar coreJsData = root['__core-js_shared__'];\n\nmodule.exports = coreJsData;\n", "var coreJsData = require('./_coreJsData');\n\n/** Used to detect methods masquerading as native. */\nvar maskSrcKey = (function() {\n var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n return uid ? ('Symbol(src)_1.' + uid) : '';\n}());\n\n/**\n * Checks if `func` has its source masked.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n */\nfunction isMasked(func) {\n return !!maskSrcKey && (maskSrcKey in func);\n}\n\nmodule.exports = isMasked;\n", "/** Used for built-in method references. */\nvar funcProto = Function.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/**\n * Converts `func` to its source code.\n *\n * @private\n * @param {Function} func The function to convert.\n * @returns {string} Returns the source code.\n */\nfunction toSource(func) {\n if (func != null) {\n try {\n return funcToString.call(func);\n } catch (e) {}\n try {\n return (func + '');\n } catch (e) {}\n }\n return '';\n}\n\nmodule.exports = toSource;\n", "var isFunction = require('./isFunction'),\n isMasked = require('./_isMasked'),\n isObject = require('./isObject'),\n toSource = require('./_toSource');\n\n/**\n * Used to match `RegExp`\n * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n */\nvar reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g;\n\n/** Used to detect host constructors (Safari). */\nvar reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n/** Used for built-in method references. */\nvar funcProto = Function.prototype,\n objectProto = Object.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to detect if a method is native. */\nvar reIsNative = RegExp('^' +\n funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n);\n\n/**\n * The base implementation of `_.isNative` without bad shim checks.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n * else `false`.\n */\nfunction baseIsNative(value) {\n if (!isObject(value) || isMasked(value)) {\n return false;\n }\n var pattern = isFunction(value) ? reIsNative : reIsHostCtor;\n return pattern.test(toSource(value));\n}\n\nmodule.exports = baseIsNative;\n", "/**\n * Gets the value at `key` of `object`.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\nfunction getValue(object, key) {\n return object == null ? undefined : object[key];\n}\n\nmodule.exports = getValue;\n", "var baseIsNative = require('./_baseIsNative'),\n getValue = require('./_getValue');\n\n/**\n * Gets the native function at `key` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the method to get.\n * @returns {*} Returns the function if it's native, else `undefined`.\n */\nfunction getNative(object, key) {\n var value = getValue(object, key);\n return baseIsNative(value) ? value : undefined;\n}\n\nmodule.exports = getNative;\n", "var getNative = require('./_getNative'),\n root = require('./_root');\n\n/* Built-in method references that are verified to be native. */\nvar Map = getNative(root, 'Map');\n\nmodule.exports = Map;\n", "var getNative = require('./_getNative');\n\n/* Built-in method references that are verified to be native. */\nvar nativeCreate = getNative(Object, 'create');\n\nmodule.exports = nativeCreate;\n", "var nativeCreate = require('./_nativeCreate');\n\n/**\n * Removes all key-value entries from the hash.\n *\n * @private\n * @name clear\n * @memberOf Hash\n */\nfunction hashClear() {\n this.__data__ = nativeCreate ? nativeCreate(null) : {};\n this.size = 0;\n}\n\nmodule.exports = hashClear;\n", "/**\n * Removes `key` and its value from the hash.\n *\n * @private\n * @name delete\n * @memberOf Hash\n * @param {Object} hash The hash to modify.\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction hashDelete(key) {\n var result = this.has(key) && delete this.__data__[key];\n this.size -= result ? 1 : 0;\n return result;\n}\n\nmodule.exports = hashDelete;\n", "var nativeCreate = require('./_nativeCreate');\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Gets the hash value for `key`.\n *\n * @private\n * @name get\n * @memberOf Hash\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction hashGet(key) {\n var data = this.__data__;\n if (nativeCreate) {\n var result = data[key];\n return result === HASH_UNDEFINED ? undefined : result;\n }\n return hasOwnProperty.call(data, key) ? data[key] : undefined;\n}\n\nmodule.exports = hashGet;\n", "var nativeCreate = require('./_nativeCreate');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Checks if a hash value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Hash\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction hashHas(key) {\n var data = this.__data__;\n return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);\n}\n\nmodule.exports = hashHas;\n", "var nativeCreate = require('./_nativeCreate');\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Sets the hash `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Hash\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the hash instance.\n */\nfunction hashSet(key, value) {\n var data = this.__data__;\n this.size += this.has(key) ? 0 : 1;\n data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n return this;\n}\n\nmodule.exports = hashSet;\n", "var hashClear = require('./_hashClear'),\n hashDelete = require('./_hashDelete'),\n hashGet = require('./_hashGet'),\n hashHas = require('./_hashHas'),\n hashSet = require('./_hashSet');\n\n/**\n * Creates a hash object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Hash(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `Hash`.\nHash.prototype.clear = hashClear;\nHash.prototype['delete'] = hashDelete;\nHash.prototype.get = hashGet;\nHash.prototype.has = hashHas;\nHash.prototype.set = hashSet;\n\nmodule.exports = Hash;\n", "var Hash = require('./_Hash'),\n ListCache = require('./_ListCache'),\n Map = require('./_Map');\n\n/**\n * Removes all key-value entries from the map.\n *\n * @private\n * @name clear\n * @memberOf MapCache\n */\nfunction mapCacheClear() {\n this.size = 0;\n this.__data__ = {\n 'hash': new Hash,\n 'map': new (Map || ListCache),\n 'string': new Hash\n };\n}\n\nmodule.exports = mapCacheClear;\n", "/**\n * Checks if `value` is suitable for use as unique object key.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n */\nfunction isKeyable(value) {\n var type = typeof value;\n return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n ? (value !== '__proto__')\n : (value === null);\n}\n\nmodule.exports = isKeyable;\n", "var isKeyable = require('./_isKeyable');\n\n/**\n * Gets the data for `map`.\n *\n * @private\n * @param {Object} map The map to query.\n * @param {string} key The reference key.\n * @returns {*} Returns the map data.\n */\nfunction getMapData(map, key) {\n var data = map.__data__;\n return isKeyable(key)\n ? data[typeof key == 'string' ? 'string' : 'hash']\n : data.map;\n}\n\nmodule.exports = getMapData;\n", "var getMapData = require('./_getMapData');\n\n/**\n * Removes `key` and its value from the map.\n *\n * @private\n * @name delete\n * @memberOf MapCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction mapCacheDelete(key) {\n var result = getMapData(this, key)['delete'](key);\n this.size -= result ? 1 : 0;\n return result;\n}\n\nmodule.exports = mapCacheDelete;\n", "var getMapData = require('./_getMapData');\n\n/**\n * Gets the map value for `key`.\n *\n * @private\n * @name get\n * @memberOf MapCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction mapCacheGet(key) {\n return getMapData(this, key).get(key);\n}\n\nmodule.exports = mapCacheGet;\n", "var getMapData = require('./_getMapData');\n\n/**\n * Checks if a map value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf MapCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction mapCacheHas(key) {\n return getMapData(this, key).has(key);\n}\n\nmodule.exports = mapCacheHas;\n", "var getMapData = require('./_getMapData');\n\n/**\n * Sets the map `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf MapCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the map cache instance.\n */\nfunction mapCacheSet(key, value) {\n var data = getMapData(this, key),\n size = data.size;\n\n data.set(key, value);\n this.size += data.size == size ? 0 : 1;\n return this;\n}\n\nmodule.exports = mapCacheSet;\n", "var mapCacheClear = require('./_mapCacheClear'),\n mapCacheDelete = require('./_mapCacheDelete'),\n mapCacheGet = require('./_mapCacheGet'),\n mapCacheHas = require('./_mapCacheHas'),\n mapCacheSet = require('./_mapCacheSet');\n\n/**\n * Creates a map cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction MapCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `MapCache`.\nMapCache.prototype.clear = mapCacheClear;\nMapCache.prototype['delete'] = mapCacheDelete;\nMapCache.prototype.get = mapCacheGet;\nMapCache.prototype.has = mapCacheHas;\nMapCache.prototype.set = mapCacheSet;\n\nmodule.exports = MapCache;\n", "var ListCache = require('./_ListCache'),\n Map = require('./_Map'),\n MapCache = require('./_MapCache');\n\n/** Used as the size to enable large array optimizations. */\nvar LARGE_ARRAY_SIZE = 200;\n\n/**\n * Sets the stack `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Stack\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the stack cache instance.\n */\nfunction stackSet(key, value) {\n var data = this.__data__;\n if (data instanceof ListCache) {\n var pairs = data.__data__;\n if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {\n pairs.push([key, value]);\n this.size = ++data.size;\n return this;\n }\n data = this.__data__ = new MapCache(pairs);\n }\n data.set(key, value);\n this.size = data.size;\n return this;\n}\n\nmodule.exports = stackSet;\n", "var ListCache = require('./_ListCache'),\n stackClear = require('./_stackClear'),\n stackDelete = require('./_stackDelete'),\n stackGet = require('./_stackGet'),\n stackHas = require('./_stackHas'),\n stackSet = require('./_stackSet');\n\n/**\n * Creates a stack cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Stack(entries) {\n var data = this.__data__ = new ListCache(entries);\n this.size = data.size;\n}\n\n// Add methods to `Stack`.\nStack.prototype.clear = stackClear;\nStack.prototype['delete'] = stackDelete;\nStack.prototype.get = stackGet;\nStack.prototype.has = stackHas;\nStack.prototype.set = stackSet;\n\nmodule.exports = Stack;\n", "/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\nfunction setCacheAdd(value) {\n this.__data__.set(value, HASH_UNDEFINED);\n return this;\n}\n\nmodule.exports = setCacheAdd;\n", "/**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {boolean} Returns `true` if `value` is found, else `false`.\n */\nfunction setCacheHas(value) {\n return this.__data__.has(value);\n}\n\nmodule.exports = setCacheHas;\n", "var MapCache = require('./_MapCache'),\n setCacheAdd = require('./_setCacheAdd'),\n setCacheHas = require('./_setCacheHas');\n\n/**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\nfunction SetCache(values) {\n var index = -1,\n length = values == null ? 0 : values.length;\n\n this.__data__ = new MapCache;\n while (++index < length) {\n this.add(values[index]);\n }\n}\n\n// Add methods to `SetCache`.\nSetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\nSetCache.prototype.has = setCacheHas;\n\nmodule.exports = SetCache;\n", "/**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\nfunction arraySome(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (predicate(array[index], index, array)) {\n return true;\n }\n }\n return false;\n}\n\nmodule.exports = arraySome;\n", "/**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction cacheHas(cache, key) {\n return cache.has(key);\n}\n\nmodule.exports = cacheHas;\n", "var SetCache = require('./_SetCache'),\n arraySome = require('./_arraySome'),\n cacheHas = require('./_cacheHas');\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\nfunction equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n arrLength = array.length,\n othLength = other.length;\n\n if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n return false;\n }\n // Check that cyclic values are equal.\n var arrStacked = stack.get(array);\n var othStacked = stack.get(other);\n if (arrStacked && othStacked) {\n return arrStacked == other && othStacked == array;\n }\n var index = -1,\n result = true,\n seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n stack.set(array, other);\n stack.set(other, array);\n\n // Ignore non-index properties.\n while (++index < arrLength) {\n var arrValue = array[index],\n othValue = other[index];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, arrValue, index, other, array, stack)\n : customizer(arrValue, othValue, index, array, other, stack);\n }\n if (compared !== undefined) {\n if (compared) {\n continue;\n }\n result = false;\n break;\n }\n // Recursively compare arrays (susceptible to call stack limits).\n if (seen) {\n if (!arraySome(other, function(othValue, othIndex) {\n if (!cacheHas(seen, othIndex) &&\n (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n return seen.push(othIndex);\n }\n })) {\n result = false;\n break;\n }\n } else if (!(\n arrValue === othValue ||\n equalFunc(arrValue, othValue, bitmask, customizer, stack)\n )) {\n result = false;\n break;\n }\n }\n stack['delete'](array);\n stack['delete'](other);\n return result;\n}\n\nmodule.exports = equalArrays;\n", "var root = require('./_root');\n\n/** Built-in value references. */\nvar Uint8Array = root.Uint8Array;\n\nmodule.exports = Uint8Array;\n", "/**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\nfunction mapToArray(map) {\n var index = -1,\n result = Array(map.size);\n\n map.forEach(function(value, key) {\n result[++index] = [key, value];\n });\n return result;\n}\n\nmodule.exports = mapToArray;\n", "/**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\nfunction setToArray(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = value;\n });\n return result;\n}\n\nmodule.exports = setToArray;\n", "var Symbol = require('./_Symbol'),\n Uint8Array = require('./_Uint8Array'),\n eq = require('./eq'),\n equalArrays = require('./_equalArrays'),\n mapToArray = require('./_mapToArray'),\n setToArray = require('./_setToArray');\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n switch (tag) {\n case dataViewTag:\n if ((object.byteLength != other.byteLength) ||\n (object.byteOffset != other.byteOffset)) {\n return false;\n }\n object = object.buffer;\n other = other.buffer;\n\n case arrayBufferTag:\n if ((object.byteLength != other.byteLength) ||\n !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n return false;\n }\n return true;\n\n case boolTag:\n case dateTag:\n case numberTag:\n // Coerce booleans to `1` or `0` and dates to milliseconds.\n // Invalid dates are coerced to `NaN`.\n return eq(+object, +other);\n\n case errorTag:\n return object.name == other.name && object.message == other.message;\n\n case regexpTag:\n case stringTag:\n // Coerce regexes to strings and treat strings, primitives and objects,\n // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n // for more details.\n return object == (other + '');\n\n case mapTag:\n var convert = mapToArray;\n\n case setTag:\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n convert || (convert = setToArray);\n\n if (object.size != other.size && !isPartial) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked) {\n return stacked == other;\n }\n bitmask |= COMPARE_UNORDERED_FLAG;\n\n // Recursively compare objects (susceptible to call stack limits).\n stack.set(object, other);\n var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n stack['delete'](object);\n return result;\n\n case symbolTag:\n if (symbolValueOf) {\n return symbolValueOf.call(object) == symbolValueOf.call(other);\n }\n }\n return false;\n}\n\nmodule.exports = equalByTag;\n", "/**\n * Appends the elements of `values` to `array`.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {Array} values The values to append.\n * @returns {Array} Returns `array`.\n */\nfunction arrayPush(array, values) {\n var index = -1,\n length = values.length,\n offset = array.length;\n\n while (++index < length) {\n array[offset + index] = values[index];\n }\n return array;\n}\n\nmodule.exports = arrayPush;\n", "/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\nmodule.exports = isArray;\n", "var arrayPush = require('./_arrayPush'),\n isArray = require('./isArray');\n\n/**\n * The base implementation of `getAllKeys` and `getAllKeysIn` which uses\n * `keysFunc` and `symbolsFunc` to get the enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @param {Function} symbolsFunc The function to get the symbols of `object`.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction baseGetAllKeys(object, keysFunc, symbolsFunc) {\n var result = keysFunc(object);\n return isArray(object) ? result : arrayPush(result, symbolsFunc(object));\n}\n\nmodule.exports = baseGetAllKeys;\n", "/**\n * A specialized version of `_.filter` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n */\nfunction arrayFilter(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index];\n if (predicate(value, index, array)) {\n result[resIndex++] = value;\n }\n }\n return result;\n}\n\nmodule.exports = arrayFilter;\n", "/**\n * This method returns a new empty array.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {Array} Returns the new empty array.\n * @example\n *\n * var arrays = _.times(2, _.stubArray);\n *\n * console.log(arrays);\n * // => [[], []]\n *\n * console.log(arrays[0] === arrays[1]);\n * // => false\n */\nfunction stubArray() {\n return [];\n}\n\nmodule.exports = stubArray;\n", "var arrayFilter = require('./_arrayFilter'),\n stubArray = require('./stubArray');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto.propertyIsEnumerable;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols;\n\n/**\n * Creates an array of the own enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbols = !nativeGetSymbols ? stubArray : function(object) {\n if (object == null) {\n return [];\n }\n object = Object(object);\n return arrayFilter(nativeGetSymbols(object), function(symbol) {\n return propertyIsEnumerable.call(object, symbol);\n });\n};\n\nmodule.exports = getSymbols;\n", "/**\n * The base implementation of `_.times` without support for iteratee shorthands\n * or max array length checks.\n *\n * @private\n * @param {number} n The number of times to invoke `iteratee`.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the array of results.\n */\nfunction baseTimes(n, iteratee) {\n var index = -1,\n result = Array(n);\n\n while (++index < n) {\n result[index] = iteratee(index);\n }\n return result;\n}\n\nmodule.exports = baseTimes;\n", "/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n return value != null && typeof value == 'object';\n}\n\nmodule.exports = isObjectLike;\n", "var baseGetTag = require('./_baseGetTag'),\n isObjectLike = require('./isObjectLike');\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]';\n\n/**\n * The base implementation of `_.isArguments`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n */\nfunction baseIsArguments(value) {\n return isObjectLike(value) && baseGetTag(value) == argsTag;\n}\n\nmodule.exports = baseIsArguments;\n", "var baseIsArguments = require('./_baseIsArguments'),\n isObjectLike = require('./isObjectLike');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto.propertyIsEnumerable;\n\n/**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n * else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\nvar isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n !propertyIsEnumerable.call(value, 'callee');\n};\n\nmodule.exports = isArguments;\n", "/**\n * This method returns `false`.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {boolean} Returns `false`.\n * @example\n *\n * _.times(2, _.stubFalse);\n * // => [false, false]\n */\nfunction stubFalse() {\n return false;\n}\n\nmodule.exports = stubFalse;\n", "var root = require('./_root'),\n stubFalse = require('./stubFalse');\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;\n\n/**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\nvar isBuffer = nativeIsBuffer || stubFalse;\n\nmodule.exports = isBuffer;\n", "/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/** Used to detect unsigned integer values. */\nvar reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n/**\n * Checks if `value` is a valid array-like index.\n *\n * @private\n * @param {*} value The value to check.\n * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n */\nfunction isIndex(value, length) {\n var type = typeof value;\n length = length == null ? MAX_SAFE_INTEGER : length;\n\n return !!length &&\n (type == 'number' ||\n (type != 'symbol' && reIsUint.test(value))) &&\n (value > -1 && value % 1 == 0 && value < length);\n}\n\nmodule.exports = isIndex;\n", "/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\nfunction isLength(value) {\n return typeof value == 'number' &&\n value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n}\n\nmodule.exports = isLength;\n", "var baseGetTag = require('./_baseGetTag'),\n isLength = require('./isLength'),\n isObjectLike = require('./isObjectLike');\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n objectTag = '[object Object]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values of typed arrays. */\nvar typedArrayTags = {};\ntypedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\ntypedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\ntypedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\ntypedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\ntypedArrayTags[uint32Tag] = true;\ntypedArrayTags[argsTag] = typedArrayTags[arrayTag] =\ntypedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\ntypedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\ntypedArrayTags[errorTag] = typedArrayTags[funcTag] =\ntypedArrayTags[mapTag] = typedArrayTags[numberTag] =\ntypedArrayTags[objectTag] = typedArrayTags[regexpTag] =\ntypedArrayTags[setTag] = typedArrayTags[stringTag] =\ntypedArrayTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.isTypedArray` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n */\nfunction baseIsTypedArray(value) {\n return isObjectLike(value) &&\n isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n}\n\nmodule.exports = baseIsTypedArray;\n", "/**\n * The base implementation of `_.unary` without support for storing metadata.\n *\n * @private\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n */\nfunction baseUnary(func) {\n return function(value) {\n return func(value);\n };\n}\n\nmodule.exports = baseUnary;\n", "var freeGlobal = require('./_freeGlobal');\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Detect free variable `process` from Node.js. */\nvar freeProcess = moduleExports && freeGlobal.process;\n\n/** Used to access faster Node.js helpers. */\nvar nodeUtil = (function() {\n try {\n // Use `util.types` for Node.js 10+.\n var types = freeModule && freeModule.require && freeModule.require('util').types;\n\n if (types) {\n return types;\n }\n\n // Legacy `process.binding('util')` for Node.js < 10.\n return freeProcess && freeProcess.binding && freeProcess.binding('util');\n } catch (e) {}\n}());\n\nmodule.exports = nodeUtil;\n", "var baseIsTypedArray = require('./_baseIsTypedArray'),\n baseUnary = require('./_baseUnary'),\n nodeUtil = require('./_nodeUtil');\n\n/* Node.js helper references. */\nvar nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n/**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\nvar isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\nmodule.exports = isTypedArray;\n", "var baseTimes = require('./_baseTimes'),\n isArguments = require('./isArguments'),\n isArray = require('./isArray'),\n isBuffer = require('./isBuffer'),\n isIndex = require('./_isIndex'),\n isTypedArray = require('./isTypedArray');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Creates an array of the enumerable property names of the array-like `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @param {boolean} inherited Specify returning inherited property names.\n * @returns {Array} Returns the array of property names.\n */\nfunction arrayLikeKeys(value, inherited) {\n var isArr = isArray(value),\n isArg = !isArr && isArguments(value),\n isBuff = !isArr && !isArg && isBuffer(value),\n isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n skipIndexes = isArr || isArg || isBuff || isType,\n result = skipIndexes ? baseTimes(value.length, String) : [],\n length = result.length;\n\n for (var key in value) {\n if ((inherited || hasOwnProperty.call(value, key)) &&\n !(skipIndexes && (\n // Safari 9 has enumerable `arguments.length` in strict mode.\n key == 'length' ||\n // Node.js 0.10 has enumerable non-index properties on buffers.\n (isBuff && (key == 'offset' || key == 'parent')) ||\n // PhantomJS 2 has enumerable non-index properties on typed arrays.\n (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n // Skip index properties.\n isIndex(key, length)\n ))) {\n result.push(key);\n }\n }\n return result;\n}\n\nmodule.exports = arrayLikeKeys;\n", "/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Checks if `value` is likely a prototype object.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n */\nfunction isPrototype(value) {\n var Ctor = value && value.constructor,\n proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;\n\n return value === proto;\n}\n\nmodule.exports = isPrototype;\n", "/**\n * Creates a unary function that invokes `func` with its argument transformed.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {Function} transform The argument transform.\n * @returns {Function} Returns the new function.\n */\nfunction overArg(func, transform) {\n return function(arg) {\n return func(transform(arg));\n };\n}\n\nmodule.exports = overArg;\n", "var overArg = require('./_overArg');\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeKeys = overArg(Object.keys, Object);\n\nmodule.exports = nativeKeys;\n", "var isPrototype = require('./_isPrototype'),\n nativeKeys = require('./_nativeKeys');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeys(object) {\n if (!isPrototype(object)) {\n return nativeKeys(object);\n }\n var result = [];\n for (var key in Object(object)) {\n if (hasOwnProperty.call(object, key) && key != 'constructor') {\n result.push(key);\n }\n }\n return result;\n}\n\nmodule.exports = baseKeys;\n", "var isFunction = require('./isFunction'),\n isLength = require('./isLength');\n\n/**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\nfunction isArrayLike(value) {\n return value != null && isLength(value.length) && !isFunction(value);\n}\n\nmodule.exports = isArrayLike;\n", "var arrayLikeKeys = require('./_arrayLikeKeys'),\n baseKeys = require('./_baseKeys'),\n isArrayLike = require('./isArrayLike');\n\n/**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\nfunction keys(object) {\n return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n}\n\nmodule.exports = keys;\n", "var baseGetAllKeys = require('./_baseGetAllKeys'),\n getSymbols = require('./_getSymbols'),\n keys = require('./keys');\n\n/**\n * Creates an array of own enumerable property names and symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeys(object) {\n return baseGetAllKeys(object, keys, getSymbols);\n}\n\nmodule.exports = getAllKeys;\n", "var getAllKeys = require('./_getAllKeys');\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n objProps = getAllKeys(object),\n objLength = objProps.length,\n othProps = getAllKeys(other),\n othLength = othProps.length;\n\n if (objLength != othLength && !isPartial) {\n return false;\n }\n var index = objLength;\n while (index--) {\n var key = objProps[index];\n if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n return false;\n }\n }\n // Check that cyclic values are equal.\n var objStacked = stack.get(object);\n var othStacked = stack.get(other);\n if (objStacked && othStacked) {\n return objStacked == other && othStacked == object;\n }\n var result = true;\n stack.set(object, other);\n stack.set(other, object);\n\n var skipCtor = isPartial;\n while (++index < objLength) {\n key = objProps[index];\n var objValue = object[key],\n othValue = other[key];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, objValue, key, other, object, stack)\n : customizer(objValue, othValue, key, object, other, stack);\n }\n // Recursively compare objects (susceptible to call stack limits).\n if (!(compared === undefined\n ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n : compared\n )) {\n result = false;\n break;\n }\n skipCtor || (skipCtor = key == 'constructor');\n }\n if (result && !skipCtor) {\n var objCtor = object.constructor,\n othCtor = other.constructor;\n\n // Non `Object` object instances with different constructors are not equal.\n if (objCtor != othCtor &&\n ('constructor' in object && 'constructor' in other) &&\n !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n result = false;\n }\n }\n stack['delete'](object);\n stack['delete'](other);\n return result;\n}\n\nmodule.exports = equalObjects;\n", "var getNative = require('./_getNative'),\n root = require('./_root');\n\n/* Built-in method references that are verified to be native. */\nvar DataView = getNative(root, 'DataView');\n\nmodule.exports = DataView;\n", "var getNative = require('./_getNative'),\n root = require('./_root');\n\n/* Built-in method references that are verified to be native. */\nvar Promise = getNative(root, 'Promise');\n\nmodule.exports = Promise;\n", "var getNative = require('./_getNative'),\n root = require('./_root');\n\n/* Built-in method references that are verified to be native. */\nvar Set = getNative(root, 'Set');\n\nmodule.exports = Set;\n", "var getNative = require('./_getNative'),\n root = require('./_root');\n\n/* Built-in method references that are verified to be native. */\nvar WeakMap = getNative(root, 'WeakMap');\n\nmodule.exports = WeakMap;\n", "var DataView = require('./_DataView'),\n Map = require('./_Map'),\n Promise = require('./_Promise'),\n Set = require('./_Set'),\n WeakMap = require('./_WeakMap'),\n baseGetTag = require('./_baseGetTag'),\n toSource = require('./_toSource');\n\n/** `Object#toString` result references. */\nvar mapTag = '[object Map]',\n objectTag = '[object Object]',\n promiseTag = '[object Promise]',\n setTag = '[object Set]',\n weakMapTag = '[object WeakMap]';\n\nvar dataViewTag = '[object DataView]';\n\n/** Used to detect maps, sets, and weakmaps. */\nvar dataViewCtorString = toSource(DataView),\n mapCtorString = toSource(Map),\n promiseCtorString = toSource(Promise),\n setCtorString = toSource(Set),\n weakMapCtorString = toSource(WeakMap);\n\n/**\n * Gets the `toStringTag` of `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nvar getTag = baseGetTag;\n\n// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.\nif ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||\n (Map && getTag(new Map) != mapTag) ||\n (Promise && getTag(Promise.resolve()) != promiseTag) ||\n (Set && getTag(new Set) != setTag) ||\n (WeakMap && getTag(new WeakMap) != weakMapTag)) {\n getTag = function(value) {\n var result = baseGetTag(value),\n Ctor = result == objectTag ? value.constructor : undefined,\n ctorString = Ctor ? toSource(Ctor) : '';\n\n if (ctorString) {\n switch (ctorString) {\n case dataViewCtorString: return dataViewTag;\n case mapCtorString: return mapTag;\n case promiseCtorString: return promiseTag;\n case setCtorString: return setTag;\n case weakMapCtorString: return weakMapTag;\n }\n }\n return result;\n };\n}\n\nmodule.exports = getTag;\n", "var Stack = require('./_Stack'),\n equalArrays = require('./_equalArrays'),\n equalByTag = require('./_equalByTag'),\n equalObjects = require('./_equalObjects'),\n getTag = require('./_getTag'),\n isArray = require('./isArray'),\n isBuffer = require('./isBuffer'),\n isTypedArray = require('./isTypedArray');\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n var objIsArr = isArray(object),\n othIsArr = isArray(other),\n objTag = objIsArr ? arrayTag : getTag(object),\n othTag = othIsArr ? arrayTag : getTag(other);\n\n objTag = objTag == argsTag ? objectTag : objTag;\n othTag = othTag == argsTag ? objectTag : othTag;\n\n var objIsObj = objTag == objectTag,\n othIsObj = othTag == objectTag,\n isSameTag = objTag == othTag;\n\n if (isSameTag && isBuffer(object)) {\n if (!isBuffer(other)) {\n return false;\n }\n objIsArr = true;\n objIsObj = false;\n }\n if (isSameTag && !objIsObj) {\n stack || (stack = new Stack);\n return (objIsArr || isTypedArray(object))\n ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n }\n if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n if (objIsWrapped || othIsWrapped) {\n var objUnwrapped = objIsWrapped ? object.value() : object,\n othUnwrapped = othIsWrapped ? other.value() : other;\n\n stack || (stack = new Stack);\n return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n }\n }\n if (!isSameTag) {\n return false;\n }\n stack || (stack = new Stack);\n return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n}\n\nmodule.exports = baseIsEqualDeep;\n", "var baseIsEqualDeep = require('./_baseIsEqualDeep'),\n isObjectLike = require('./isObjectLike');\n\n/**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Unordered comparison\n * 2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\nfunction baseIsEqual(value, other, bitmask, customizer, stack) {\n if (value === other) {\n return true;\n }\n if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n return value !== value && other !== other;\n }\n return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n}\n\nmodule.exports = baseIsEqual;\n", "var baseIsEqual = require('./_baseIsEqual');\n\n/**\n * Performs a deep comparison between two values to determine if they are\n * equivalent.\n *\n * **Note:** This method supports comparing arrays, array buffers, booleans,\n * date objects, error objects, maps, numbers, `Object` objects, regexes,\n * sets, strings, symbols, and typed arrays. `Object` objects are compared\n * by their own, not inherited, enumerable properties. Functions and DOM\n * nodes are compared by strict equality, i.e. `===`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.isEqual(object, other);\n * // => true\n *\n * object === other;\n * // => false\n */\nfunction isEqual(value, other) {\n return baseIsEqual(value, other);\n}\n\nmodule.exports = isEqual;\n", "/**\n * A specialized version of `_.forEach` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns `array`.\n */\nfunction arrayEach(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (iteratee(array[index], index, array) === false) {\n break;\n }\n }\n return array;\n}\n\nmodule.exports = arrayEach;\n", "var getNative = require('./_getNative');\n\nvar defineProperty = (function() {\n try {\n var func = getNative(Object, 'defineProperty');\n func({}, '', {});\n return func;\n } catch (e) {}\n}());\n\nmodule.exports = defineProperty;\n", "var defineProperty = require('./_defineProperty');\n\n/**\n * The base implementation of `assignValue` and `assignMergeValue` without\n * value checks.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\nfunction baseAssignValue(object, key, value) {\n if (key == '__proto__' && defineProperty) {\n defineProperty(object, key, {\n 'configurable': true,\n 'enumerable': true,\n 'value': value,\n 'writable': true\n });\n } else {\n object[key] = value;\n }\n}\n\nmodule.exports = baseAssignValue;\n", "var baseAssignValue = require('./_baseAssignValue'),\n eq = require('./eq');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Assigns `value` to `key` of `object` if the existing value is not equivalent\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\nfunction assignValue(object, key, value) {\n var objValue = object[key];\n if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||\n (value === undefined && !(key in object))) {\n baseAssignValue(object, key, value);\n }\n}\n\nmodule.exports = assignValue;\n", "var assignValue = require('./_assignValue'),\n baseAssignValue = require('./_baseAssignValue');\n\n/**\n * Copies properties of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy properties from.\n * @param {Array} props The property identifiers to copy.\n * @param {Object} [object={}] The object to copy properties to.\n * @param {Function} [customizer] The function to customize copied values.\n * @returns {Object} Returns `object`.\n */\nfunction copyObject(source, props, object, customizer) {\n var isNew = !object;\n object || (object = {});\n\n var index = -1,\n length = props.length;\n\n while (++index < length) {\n var key = props[index];\n\n var newValue = customizer\n ? customizer(object[key], source[key], key, object, source)\n : undefined;\n\n if (newValue === undefined) {\n newValue = source[key];\n }\n if (isNew) {\n baseAssignValue(object, key, newValue);\n } else {\n assignValue(object, key, newValue);\n }\n }\n return object;\n}\n\nmodule.exports = copyObject;\n", "var copyObject = require('./_copyObject'),\n keys = require('./keys');\n\n/**\n * The base implementation of `_.assign` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\nfunction baseAssign(object, source) {\n return object && copyObject(source, keys(source), object);\n}\n\nmodule.exports = baseAssign;\n", "/**\n * This function is like\n * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * except that it includes inherited enumerable properties.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction nativeKeysIn(object) {\n var result = [];\n if (object != null) {\n for (var key in Object(object)) {\n result.push(key);\n }\n }\n return result;\n}\n\nmodule.exports = nativeKeysIn;\n", "var isObject = require('./isObject'),\n isPrototype = require('./_isPrototype'),\n nativeKeysIn = require('./_nativeKeysIn');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeysIn(object) {\n if (!isObject(object)) {\n return nativeKeysIn(object);\n }\n var isProto = isPrototype(object),\n result = [];\n\n for (var key in object) {\n if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {\n result.push(key);\n }\n }\n return result;\n}\n\nmodule.exports = baseKeysIn;\n", "var arrayLikeKeys = require('./_arrayLikeKeys'),\n baseKeysIn = require('./_baseKeysIn'),\n isArrayLike = require('./isArrayLike');\n\n/**\n * Creates an array of the own and inherited enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keysIn(new Foo);\n * // => ['a', 'b', 'c'] (iteration order is not guaranteed)\n */\nfunction keysIn(object) {\n return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);\n}\n\nmodule.exports = keysIn;\n", "var copyObject = require('./_copyObject'),\n keysIn = require('./keysIn');\n\n/**\n * The base implementation of `_.assignIn` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\nfunction baseAssignIn(object, source) {\n return object && copyObject(source, keysIn(source), object);\n}\n\nmodule.exports = baseAssignIn;\n", "var root = require('./_root');\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined,\n allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;\n\n/**\n * Creates a clone of `buffer`.\n *\n * @private\n * @param {Buffer} buffer The buffer to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Buffer} Returns the cloned buffer.\n */\nfunction cloneBuffer(buffer, isDeep) {\n if (isDeep) {\n return buffer.slice();\n }\n var length = buffer.length,\n result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);\n\n buffer.copy(result);\n return result;\n}\n\nmodule.exports = cloneBuffer;\n", "/**\n * Copies the values of `source` to `array`.\n *\n * @private\n * @param {Array} source The array to copy values from.\n * @param {Array} [array=[]] The array to copy values to.\n * @returns {Array} Returns `array`.\n */\nfunction copyArray(source, array) {\n var index = -1,\n length = source.length;\n\n array || (array = Array(length));\n while (++index < length) {\n array[index] = source[index];\n }\n return array;\n}\n\nmodule.exports = copyArray;\n", "var copyObject = require('./_copyObject'),\n getSymbols = require('./_getSymbols');\n\n/**\n * Copies own symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\nfunction copySymbols(source, object) {\n return copyObject(source, getSymbols(source), object);\n}\n\nmodule.exports = copySymbols;\n", "var overArg = require('./_overArg');\n\n/** Built-in value references. */\nvar getPrototype = overArg(Object.getPrototypeOf, Object);\n\nmodule.exports = getPrototype;\n", "var arrayPush = require('./_arrayPush'),\n getPrototype = require('./_getPrototype'),\n getSymbols = require('./_getSymbols'),\n stubArray = require('./stubArray');\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols;\n\n/**\n * Creates an array of the own and inherited enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {\n var result = [];\n while (object) {\n arrayPush(result, getSymbols(object));\n object = getPrototype(object);\n }\n return result;\n};\n\nmodule.exports = getSymbolsIn;\n", "var copyObject = require('./_copyObject'),\n getSymbolsIn = require('./_getSymbolsIn');\n\n/**\n * Copies own and inherited symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\nfunction copySymbolsIn(source, object) {\n return copyObject(source, getSymbolsIn(source), object);\n}\n\nmodule.exports = copySymbolsIn;\n", "var baseGetAllKeys = require('./_baseGetAllKeys'),\n getSymbolsIn = require('./_getSymbolsIn'),\n keysIn = require('./keysIn');\n\n/**\n * Creates an array of own and inherited enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeysIn(object) {\n return baseGetAllKeys(object, keysIn, getSymbolsIn);\n}\n\nmodule.exports = getAllKeysIn;\n", "/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Initializes an array clone.\n *\n * @private\n * @param {Array} array The array to clone.\n * @returns {Array} Returns the initialized clone.\n */\nfunction initCloneArray(array) {\n var length = array.length,\n result = new array.constructor(length);\n\n // Add properties assigned by `RegExp#exec`.\n if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {\n result.index = array.index;\n result.input = array.input;\n }\n return result;\n}\n\nmodule.exports = initCloneArray;\n", "var Uint8Array = require('./_Uint8Array');\n\n/**\n * Creates a clone of `arrayBuffer`.\n *\n * @private\n * @param {ArrayBuffer} arrayBuffer The array buffer to clone.\n * @returns {ArrayBuffer} Returns the cloned array buffer.\n */\nfunction cloneArrayBuffer(arrayBuffer) {\n var result = new arrayBuffer.constructor(arrayBuffer.byteLength);\n new Uint8Array(result).set(new Uint8Array(arrayBuffer));\n return result;\n}\n\nmodule.exports = cloneArrayBuffer;\n", "var cloneArrayBuffer = require('./_cloneArrayBuffer');\n\n/**\n * Creates a clone of `dataView`.\n *\n * @private\n * @param {Object} dataView The data view to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned data view.\n */\nfunction cloneDataView(dataView, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;\n return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);\n}\n\nmodule.exports = cloneDataView;\n", "/** Used to match `RegExp` flags from their coerced string values. */\nvar reFlags = /\\w*$/;\n\n/**\n * Creates a clone of `regexp`.\n *\n * @private\n * @param {Object} regexp The regexp to clone.\n * @returns {Object} Returns the cloned regexp.\n */\nfunction cloneRegExp(regexp) {\n var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));\n result.lastIndex = regexp.lastIndex;\n return result;\n}\n\nmodule.exports = cloneRegExp;\n", "var Symbol = require('./_Symbol');\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * Creates a clone of the `symbol` object.\n *\n * @private\n * @param {Object} symbol The symbol object to clone.\n * @returns {Object} Returns the cloned symbol object.\n */\nfunction cloneSymbol(symbol) {\n return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};\n}\n\nmodule.exports = cloneSymbol;\n", "var cloneArrayBuffer = require('./_cloneArrayBuffer');\n\n/**\n * Creates a clone of `typedArray`.\n *\n * @private\n * @param {Object} typedArray The typed array to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned typed array.\n */\nfunction cloneTypedArray(typedArray, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;\n return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);\n}\n\nmodule.exports = cloneTypedArray;\n", "var cloneArrayBuffer = require('./_cloneArrayBuffer'),\n cloneDataView = require('./_cloneDataView'),\n cloneRegExp = require('./_cloneRegExp'),\n cloneSymbol = require('./_cloneSymbol'),\n cloneTypedArray = require('./_cloneTypedArray');\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/**\n * Initializes an object clone based on its `toStringTag`.\n *\n * **Note:** This function only supports cloning values with tags of\n * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.\n *\n * @private\n * @param {Object} object The object to clone.\n * @param {string} tag The `toStringTag` of the object to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the initialized clone.\n */\nfunction initCloneByTag(object, tag, isDeep) {\n var Ctor = object.constructor;\n switch (tag) {\n case arrayBufferTag:\n return cloneArrayBuffer(object);\n\n case boolTag:\n case dateTag:\n return new Ctor(+object);\n\n case dataViewTag:\n return cloneDataView(object, isDeep);\n\n case float32Tag: case float64Tag:\n case int8Tag: case int16Tag: case int32Tag:\n case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:\n return cloneTypedArray(object, isDeep);\n\n case mapTag:\n return new Ctor;\n\n case numberTag:\n case stringTag:\n return new Ctor(object);\n\n case regexpTag:\n return cloneRegExp(object);\n\n case setTag:\n return new Ctor;\n\n case symbolTag:\n return cloneSymbol(object);\n }\n}\n\nmodule.exports = initCloneByTag;\n", "var isObject = require('./isObject');\n\n/** Built-in value references. */\nvar objectCreate = Object.create;\n\n/**\n * The base implementation of `_.create` without support for assigning\n * properties to the created object.\n *\n * @private\n * @param {Object} proto The object to inherit from.\n * @returns {Object} Returns the new object.\n */\nvar baseCreate = (function() {\n function object() {}\n return function(proto) {\n if (!isObject(proto)) {\n return {};\n }\n if (objectCreate) {\n return objectCreate(proto);\n }\n object.prototype = proto;\n var result = new object;\n object.prototype = undefined;\n return result;\n };\n}());\n\nmodule.exports = baseCreate;\n", "var baseCreate = require('./_baseCreate'),\n getPrototype = require('./_getPrototype'),\n isPrototype = require('./_isPrototype');\n\n/**\n * Initializes an object clone.\n *\n * @private\n * @param {Object} object The object to clone.\n * @returns {Object} Returns the initialized clone.\n */\nfunction initCloneObject(object) {\n return (typeof object.constructor == 'function' && !isPrototype(object))\n ? baseCreate(getPrototype(object))\n : {};\n}\n\nmodule.exports = initCloneObject;\n", "var getTag = require('./_getTag'),\n isObjectLike = require('./isObjectLike');\n\n/** `Object#toString` result references. */\nvar mapTag = '[object Map]';\n\n/**\n * The base implementation of `_.isMap` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n */\nfunction baseIsMap(value) {\n return isObjectLike(value) && getTag(value) == mapTag;\n}\n\nmodule.exports = baseIsMap;\n", "var baseIsMap = require('./_baseIsMap'),\n baseUnary = require('./_baseUnary'),\n nodeUtil = require('./_nodeUtil');\n\n/* Node.js helper references. */\nvar nodeIsMap = nodeUtil && nodeUtil.isMap;\n\n/**\n * Checks if `value` is classified as a `Map` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n * @example\n *\n * _.isMap(new Map);\n * // => true\n *\n * _.isMap(new WeakMap);\n * // => false\n */\nvar isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;\n\nmodule.exports = isMap;\n", "var getTag = require('./_getTag'),\n isObjectLike = require('./isObjectLike');\n\n/** `Object#toString` result references. */\nvar setTag = '[object Set]';\n\n/**\n * The base implementation of `_.isSet` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n */\nfunction baseIsSet(value) {\n return isObjectLike(value) && getTag(value) == setTag;\n}\n\nmodule.exports = baseIsSet;\n", "var baseIsSet = require('./_baseIsSet'),\n baseUnary = require('./_baseUnary'),\n nodeUtil = require('./_nodeUtil');\n\n/* Node.js helper references. */\nvar nodeIsSet = nodeUtil && nodeUtil.isSet;\n\n/**\n * Checks if `value` is classified as a `Set` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n * @example\n *\n * _.isSet(new Set);\n * // => true\n *\n * _.isSet(new WeakSet);\n * // => false\n */\nvar isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;\n\nmodule.exports = isSet;\n", "var Stack = require('./_Stack'),\n arrayEach = require('./_arrayEach'),\n assignValue = require('./_assignValue'),\n baseAssign = require('./_baseAssign'),\n baseAssignIn = require('./_baseAssignIn'),\n cloneBuffer = require('./_cloneBuffer'),\n copyArray = require('./_copyArray'),\n copySymbols = require('./_copySymbols'),\n copySymbolsIn = require('./_copySymbolsIn'),\n getAllKeys = require('./_getAllKeys'),\n getAllKeysIn = require('./_getAllKeysIn'),\n getTag = require('./_getTag'),\n initCloneArray = require('./_initCloneArray'),\n initCloneByTag = require('./_initCloneByTag'),\n initCloneObject = require('./_initCloneObject'),\n isArray = require('./isArray'),\n isBuffer = require('./isBuffer'),\n isMap = require('./isMap'),\n isObject = require('./isObject'),\n isSet = require('./isSet'),\n keys = require('./keys'),\n keysIn = require('./keysIn');\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_FLAT_FLAG = 2,\n CLONE_SYMBOLS_FLAG = 4;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n objectTag = '[object Object]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]',\n weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values supported by `_.clone`. */\nvar cloneableTags = {};\ncloneableTags[argsTag] = cloneableTags[arrayTag] =\ncloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =\ncloneableTags[boolTag] = cloneableTags[dateTag] =\ncloneableTags[float32Tag] = cloneableTags[float64Tag] =\ncloneableTags[int8Tag] = cloneableTags[int16Tag] =\ncloneableTags[int32Tag] = cloneableTags[mapTag] =\ncloneableTags[numberTag] = cloneableTags[objectTag] =\ncloneableTags[regexpTag] = cloneableTags[setTag] =\ncloneableTags[stringTag] = cloneableTags[symbolTag] =\ncloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =\ncloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;\ncloneableTags[errorTag] = cloneableTags[funcTag] =\ncloneableTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.clone` and `_.cloneDeep` which tracks\n * traversed objects.\n *\n * @private\n * @param {*} value The value to clone.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Deep clone\n * 2 - Flatten inherited properties\n * 4 - Clone symbols\n * @param {Function} [customizer] The function to customize cloning.\n * @param {string} [key] The key of `value`.\n * @param {Object} [object] The parent object of `value`.\n * @param {Object} [stack] Tracks traversed objects and their clone counterparts.\n * @returns {*} Returns the cloned value.\n */\nfunction baseClone(value, bitmask, customizer, key, object, stack) {\n var result,\n isDeep = bitmask & CLONE_DEEP_FLAG,\n isFlat = bitmask & CLONE_FLAT_FLAG,\n isFull = bitmask & CLONE_SYMBOLS_FLAG;\n\n if (customizer) {\n result = object ? customizer(value, key, object, stack) : customizer(value);\n }\n if (result !== undefined) {\n return result;\n }\n if (!isObject(value)) {\n return value;\n }\n var isArr = isArray(value);\n if (isArr) {\n result = initCloneArray(value);\n if (!isDeep) {\n return copyArray(value, result);\n }\n } else {\n var tag = getTag(value),\n isFunc = tag == funcTag || tag == genTag;\n\n if (isBuffer(value)) {\n return cloneBuffer(value, isDeep);\n }\n if (tag == objectTag || tag == argsTag || (isFunc && !object)) {\n result = (isFlat || isFunc) ? {} : initCloneObject(value);\n if (!isDeep) {\n return isFlat\n ? copySymbolsIn(value, baseAssignIn(result, value))\n : copySymbols(value, baseAssign(result, value));\n }\n } else {\n if (!cloneableTags[tag]) {\n return object ? value : {};\n }\n result = initCloneByTag(value, tag, isDeep);\n }\n }\n // Check for circular references and return its corresponding clone.\n stack || (stack = new Stack);\n var stacked = stack.get(value);\n if (stacked) {\n return stacked;\n }\n stack.set(value, result);\n\n if (isSet(value)) {\n value.forEach(function(subValue) {\n result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));\n });\n } else if (isMap(value)) {\n value.forEach(function(subValue, key) {\n result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n }\n\n var keysFunc = isFull\n ? (isFlat ? getAllKeysIn : getAllKeys)\n : (isFlat ? keysIn : keys);\n\n var props = isArr ? undefined : keysFunc(value);\n arrayEach(props || value, function(subValue, key) {\n if (props) {\n key = subValue;\n subValue = value[key];\n }\n // Recursively populate clone (susceptible to call stack limits).\n assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n return result;\n}\n\nmodule.exports = baseClone;\n", "var baseClone = require('./_baseClone');\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * This method is like `_.clone` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @returns {*} Returns the deep cloned value.\n * @see _.clone\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var deep = _.cloneDeep(objects);\n * console.log(deep[0] === objects[0]);\n * // => false\n */\nfunction cloneDeep(value) {\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);\n}\n\nmodule.exports = cloneDeep;\n", "import type { Client } from \"./session/Client\";\n\n/**\n * @noInheritDoc\n * @category Utils\n */\nexport class EditionEvent extends Event {\n /**\n * The client id that emitted the event.\n */\n public readonly emitter: Client | null;\n\n /**\n * Returns true if the event was made by the current app.\n */\n isLocal(): boolean {\n return this.emitter === null;\n }\n\n /**\n * Returns true if the event was made by another user from another instance of the app or even another app.\n */\n isExternal(): boolean {\n return this.emitter !== null;\n }\n\n /**\n * @internal\n */\n constructor(event_name: string, emitter: Client | null) {\n super(event_name);\n this.emitter = emitter;\n }\n}\n", "import type { LivelinkCore } from \"./LivelinkCore\";\nimport type VM from \"node:vm\";\n\n/**\n *\n */\nconst isNode = typeof process !== \"undefined\" && process.versions != null && process.versions.node != null;\n\n/**\n * The URL of the Livelink core library. Injected by the build system.\n */\ndeclare const LIVELINK_CORE_URL: string;\n\n/**\n *\n */\ntype LivelinkCoreType = typeof LivelinkCore;\n\n/**\n *\n */\ntype CoreImporter = () => Promise<{\n LivelinkCore: LivelinkCoreType;\n LIVELINK_CORE_VERSION: string;\n LIVELINK_CORE_COMMIT_SHA: string;\n}>;\n\n/**\n * @inline\n */\ntype BuildTarget = \"prod\" | \"dev\" | \"debug\";\n\n/**\n * Dynamically loads the Livelink core library.\n *\n * {@link DynamicLoader.load} must be called before accessing {@link DynamicLoader.Core}.\n *\n * ### Usage\n * ```typescript\n * await DynamicLoader.load();\n * const core = new DynamicLoader.Core();\n * ```\n *\n * @category Core\n */\nexport class DynamicLoader {\n /**\n *\n */\n static #core: LivelinkCoreType | null = null;\n\n /**\n *\n */\n static #importPromise: Promise | null = null;\n\n /**\n * Returns the core.\n */\n static get Core(): LivelinkCoreType {\n if (!DynamicLoader.#core) {\n throw new Error(\"Livelink core not initialized\");\n }\n return DynamicLoader.#core;\n }\n\n /**\n * Dynamically loads the Livelink core library.\n *\n * Must be called before accessing {@link DynamicLoader.Core}.\n * Only one target can be loaded at a time.\n *\n * @param target - The target build to load.\n * - `\"prod\"`: Contains no debug information.\n * - `\"dev\"`: Contains some debug information.\n * - `\"debug\"`: Contains extra debug information.\n */\n static load(target: BuildTarget = \"prod\"): Promise {\n if (!DynamicLoader.#importPromise) {\n DynamicLoader.#importPromise = DynamicLoader.#importCore(target);\n }\n\n return DynamicLoader.#importPromise;\n }\n\n /**\n *\n */\n static async #importCore(target: BuildTarget): Promise {\n const dynamicImport = await DynamicLoader.#createImporter(target);\n const { LivelinkCore } = await dynamicImport();\n\n DynamicLoader.#core = LivelinkCore;\n\n const TARGET_COLOR = {\n prod: \"#FFC700\",\n dev: \"#36D399\",\n debug: \"#FB4949\",\n } satisfies Record;\n\n console.info(\n `%c Livelink Core initialized \uD83D\uDE80 %c ${LivelinkCore.VERSION} %c ${LivelinkCore.COMMIT_SHA} %c${target}`,\n \"background: #080A12; color: #FFC700; font-weight: bold; padding: 8px; padding-right: 164px; border-radius: 16px; margin: 16px 0 16px 0\",\n \"background: #9EA6D6; color: #0A1018; font-weight: bold; padding: 1px; padding-right: 0px; margin-left: -160px; border-radius: 16px 0 0 16px;\",\n \"background: #6973A8; color: #0A1018; font-weight: bold; padding: 1px; padding-left: 0; border-radius: 0 16px 16px 0;\",\n `background: ${TARGET_COLOR[target]}; color: #000; font-weight: bold; padding: 6px 16px; border: 4px solid #080A12; border-radius: 16px; margin-left: 16px`,\n );\n }\n\n /**\n *\n */\n static async #createImporter(target: string): Promise {\n const moduleURL = LIVELINK_CORE_URL + \"/\" + (target !== \"prod\" ? `core.${target}.mjs` : \"core.mjs\");\n\n if (!isNode) {\n return new Function(\"return import('\" + moduleURL + \"')\") as CoreImporter;\n }\n\n const response = await fetch(moduleURL);\n const source = await response.text();\n\n // As a platform neutral build, we needs to load node:vm dynamically.\n // We can't use await import('node:vm') directly because it will be resolved at build time\n // and will not be available in the browser.\n const vm = (await new Function(\"return import('node:vm')\")()) as {\n SourceTextModule: typeof VM.SourceTextModule;\n };\n\n // VM Modules is an experimental feature, so it may not be available in all versions of Node.js.\n // This feature is only available with the --experimental-vm-modules command flag enabled.\n if (!vm.SourceTextModule) {\n return new Function(\"return import('data:text/javascript;base64,\" + btoa(source) + \"')\") as CoreImporter;\n }\n\n console.info(\"Using experimental VM SourceTextModule to load Livelink core\");\n return (async () => {\n const module = new vm.SourceTextModule(source, { identifier: moduleURL });\n // @ts-expect-error: Since core has no dependencies, the linker function will never be called.\n await module.link(() => {});\n await module.evaluate();\n\n return module.namespace;\n }) as CoreImporter;\n }\n\n /**\n *\n */\n private constructor() {}\n}\n", "export * from \"./DynamicLoader\";\nexport type * from \"./core\";\n\n//------------------------------------------------------------------------------\n/**\n * Version of the Livelink Core library, injected by the build system.\n * @internal\n */\ndeclare const LIVELINK_CORE_VERSION: string;\n\n/**\n * Name of the package, injected by the build system.\n * @internal\n */\ndeclare const PACKAGE_NAME: string;\n\n//------------------------------------------------------------------------------\ndeclare global {\n interface Window {\n __LIVELINK__: Record;\n }\n}\n\n//------------------------------------------------------------------------------\nif (typeof window !== \"undefined\") {\n if (!window.__LIVELINK__) {\n window.__LIVELINK__ = {};\n }\n\n if (Object.prototype.hasOwnProperty.call(window.__LIVELINK__, PACKAGE_NAME)) {\n console.warn(\"\u26A0\uFE0F WARNING \u26A0\uFE0F Multiple instances of Livelink Core being imported.\");\n } else {\n window.__LIVELINK__[PACKAGE_NAME] = LIVELINK_CORE_VERSION;\n }\n}\n", "/**\n * Base URL of the 3dverse application API.\n *\n * `API_HOSTNAME` is injected at build time by each client SDK's bundler (see the\n * `define` block in the consuming SDK's `esbuild.js`, and `vitest.config.ts` for tests).\n *\n * Mutable so that applications can retarget another environment at runtime through the\n * `Livelink._api_url` accessor exposed by each SDK facade.\n */\nlet api_url = `https://${API_HOSTNAME}/app/v1`;\n\n/**\n * @internal\n * The current base URL of the 3dverse application API. Read at call time by every API request.\n */\nexport function getApiUrl(): string {\n return api_url;\n}\n\n/**\n * @internal\n * Retarget the 3dverse application API. Must be set before any API call is made.\n */\nexport function setApiUrl(url: string): void {\n api_url = url;\n}\n", "/**\n * Convert an update rate in Hz to a timer interval in milliseconds.\n *\n * Shared by every rate the SDK turns into a `setInterval`, so they all reject the same things. In\n * particular `NaN` \u2014 which `Number(process.env.SOMETHING)` produces from any bad value, and which\n * `setInterval` coerces to 0 ms, turning a configuration typo into a busy loop.\n *\n * @throws RangeError if the rate is not a finite number in the `(0, 125]` range.\n *\n * @internal\n */\nexport function computeIntervalInMs({ name, rate }: { name: string; rate: number }): number {\n const interval_in_ms = 1000 / rate;\n if (!Number.isFinite(interval_in_ms) || interval_in_ms < 8) {\n throw new RangeError(\n `${name} must be a finite number in the (0, 125] range so that the resulting interval` +\n ` is at least 8 ms, got ${rate}.`,\n );\n }\n return interval_in_ms;\n}\n", "//------------------------------------------------------------------------------\nimport type { ActivityWatcher, Commands, Events, LivelinkCore } from \"@3dverse/livelink.core\";\nimport { DynamicLoader } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport type { LivelinkInstance } from \"./LivelinkInstance\";\nimport { getApiUrl, setApiUrl } from \"./config/api\";\nimport { computeIntervalInMs } from \"./rates\";\nimport type { SceneBase } from \"./scene/Scene\";\nimport type { Entity } from \"./scene/Entity\";\nimport type { Session } from \"./session/Session\";\n\n/**\n * Represents the various stages of the Livelink connection process.\n *\n * Each stage represents a different phase of establishing a connection to the Livelink service:\n *\n * - `\"initializing\"` - Loading dynamic dependencies and preparing the connection infrastructure\n * - `\"finding-session\"` - Looking for existing sessions on the server (used with join and join_or_start methods)\n * - `\"creating-session\"` - Creating a new session on the server (used with start method or join_or_start fallback)\n * - `\"registering-client\"` - Registering the client with the session and obtaining session credentials\n * - `\"connecting\"` - Establishing the WebSocket connection to the gateway server\n * - `\"configuring\"` - Setting up the client configuration and preparing for streaming\n * - `\"ready\"` - Connection is complete and streaming can begin\n *\n * This is the vocabulary of the whole connection process, not the set a given facade emits: the\n * headless agent never reports `\"configuring\"` since it has no renderer to configure, and the\n * browser SDK reports `\"configuring\"` and `\"ready\"` from its React layer rather than from\n * `Livelink` itself.\n *\n * @category Main\n */\nexport type LivelinkConnectionStage =\n | \"initializing\"\n | \"finding-session\"\n | \"creating-session\"\n | \"registering-client\"\n | \"connecting\"\n | \"configuring\"\n | \"ready\";\n\n/**\n * Callback function type for receiving connection progress updates.\n *\n * @param stage - The current stage of the connection process.\n *\n * @category Main\n */\nexport type LivelinkProgressCallback = (stage: LivelinkConnectionStage) => void;\n\n/**\n * The rates at which a client flushes its pending changes to the server.\n *\n * Both must be a finite number in the `(0, 125]` range so that the resulting interval is at least 8 milliseconds.\n *\n * @category Main\n */\nexport type UpdateLoopRates = {\n /**\n * How many times per second the entity and scene setting changes are sent to the server.\n * This is the rate at which own edits become visible to everyone, so it bounds\n * the sample rate of anything animated.\n *\n * @defaultValue 30\n */\n updates_per_second?: number;\n\n /**\n * @deprecated\n *\n * How many times per second the transient, non-persisted state of this client \u2014 broadcast\n * entities, broadcast scene settings \u2014 is sent to the server.\n *\n * @defaultValue 1\n */\n broadcasts_per_second?: number;\n};\n\n/**\n * Shared implementation of a livelink client facade.\n *\n * Owns the connection to the core, the wiring of the core event listeners to the session and the\n * scene, and the update/broadcast loop that flushes dirty entities and scene settings to the\n * server.\n *\n * Each SDK derives its own facade from this class:\n * - the browser SDK adds the streaming, rendering and input layers,\n * - the headless agent SDK exposes it almost as-is.\n *\n * @category Main\n */\nexport abstract class LivelinkBase<\n // The entity type is threaded explicitly because SceneBase is invariant in it: constraining on\n // SceneBase lets each SDK's Scene match the constraint with its own entity flavour.\n EntityType extends Entity,\n SceneType extends SceneBase,\n SessionType extends Session,\n> implements LivelinkInstance {\n /**\n * @internal\n * Base URL of the 3dverse application API.\n *\n * Reassign it to target another environment. Must be set before any session is created or\n * joined.\n */\n static get _api_url(): string {\n return getApiUrl();\n }\n\n static set _api_url(url: string) {\n setApiUrl(url);\n }\n\n /**\n * The session this instance is connected to.\n */\n public readonly session: SessionType;\n\n /**\n * The scene the current session is running.\n */\n public readonly scene: SceneType;\n\n /**\n * The core object managing the connection to the server.\n */\n readonly #core: LivelinkCore;\n\n /**\n * Interval between updates sent to the renderer.\n */\n #update_interval: ReturnType | null = null;\n\n /**\n * Interval between broadcasts sent to the editor.\n */\n #broadcast_interval: ReturnType | null = null;\n\n /**\n * Whether the instance has been disconnected.\n */\n #disconnected: boolean = false;\n\n /**\n * The activity watcher disconnects the session if no activity is detected for a certain amount\n * of time.\n */\n get activity_watcher(): ActivityWatcher {\n return this.#core.activity_watcher;\n }\n\n /**\n * The latency of the connection in milliseconds.\n */\n get latency(): number {\n return this.#core.latency;\n }\n\n /**\n * @internal\n * The core object managing the connection to the server.\n */\n protected get _core(): LivelinkCore {\n return this.#core;\n }\n\n /**\n * @internal\n * Whether the instance has been disconnected.\n */\n protected get _is_disconnected(): boolean {\n return this.#disconnected;\n }\n\n /**\n * @internal\n */\n protected constructor({ session }: { session: SessionType }) {\n this.session = session;\n this.#core = new DynamicLoader.Core();\n this.scene = this._createScene({ core: this.#core });\n }\n\n /**\n * @internal\n *\n * Instantiate the concrete scene type for this facade.\n *\n * Called from the base constructor: implementations must not touch any subclass state, only\n * construct the scene from the given core (same rule as `SceneBase._instantiateEntity`).\n */\n protected abstract _createScene({ core }: { core: LivelinkCore }): SceneType;\n\n /**\n * @internal\n * Register the client on the session, connect the core to the gateway and install the core\n * event listeners.\n */\n protected async _connect({\n is_headless,\n onProgress,\n }: {\n is_headless: boolean;\n onProgress?: LivelinkProgressCallback;\n }): Promise {\n onProgress?.(\"registering-client\");\n await this.session.registerClient({ is_headless });\n\n onProgress?.(\"connecting\");\n await this.#core.connect({ session: this.session });\n this._installCoreEventListeners();\n }\n\n /**\n * Disconnect from the server and release the core resources.\n *\n * Note that the session is not closed, it can be reconnected later.\n * Safe to call multiple times.\n */\n async disconnect(): Promise {\n if (this.#disconnected) {\n return;\n }\n this.#disconnected = true;\n // Told rather than listened for: the core's own `on-disconnected` never reaches the scene on\n // a disconnect we initiate, since the listeners come off just below.\n this.scene._onDisconnected();\n\n this._uninstallCoreEventListeners();\n this._stopUpdateLoop();\n\n await this.#core.disconnect();\n }\n\n /**\n * Send a script event to the server to start the simulation.\n */\n startSimulation(): void {\n this.#core.setSimulationState({ state: \"start_simulation\" });\n }\n\n /**\n * Send a script event to the server to pause the simulation.\n */\n pauseSimulation(): void {\n this.#core.setSimulationState({ state: \"pause_simulation\" });\n }\n\n /**\n * Send a script event to the server to stop the simulation.\n */\n stopSimulation(): void {\n this.#core.setSimulationState({ state: \"stop_simulation\" });\n }\n\n /**\n * Send a partial skeleton pose targeting a specific animation controller.\n *\n * @param params\n * @param params.controller The entity having the animation controller component.\n * @param params.partial_pose The partial pose to send.\n */\n sendSkeletonPose({\n controller,\n partial_pose,\n }: {\n controller: EntityType;\n partial_pose: Commands.SkeletonPartialPose;\n }): void {\n this._core.sendSkeletonPose({\n controller_rtid: controller.rtid,\n partial_pose,\n });\n }\n\n /**\n * @internal\n * Start the loops flushing entity and scene settings changes to the server.\n *\n * Each rate must be a finite number in the `(0, 125]` range so that the resulting interval is\n * at least 8 milliseconds.\n *\n * Safe to call again: any loop already running is stopped first, so a second start never orphans\n * the previous intervals.\n *\n * Does nothing once the instance is disconnected: `disconnect()` early-returns on every later\n * call, so intervals installed after it would never be cleared again.\n *\n * @throws RangeError if a rate falls outside the accepted range.\n */\n protected _startUpdateLoop({ updates_per_second = 30, broadcasts_per_second = 1 }: UpdateLoopRates = {}): void {\n if (this.#disconnected) {\n return;\n }\n\n const update_interval_in_ms = computeIntervalInMs({ name: \"updates_per_second\", rate: updates_per_second });\n const broadcast_interval_in_ms = computeIntervalInMs({\n name: \"broadcasts_per_second\",\n rate: broadcasts_per_second,\n });\n\n // Clear any loop already running before installing the new intervals \u2014 an orphaned interval\n // keeps flushing entities forever and survives `disconnect()`, which only clears the last\n // handles. Done after the rate validation above so an invalid rate never tears down a\n // healthy running loop.\n this._stopUpdateLoop();\n\n this.#update_interval = setInterval(() => {\n this._updateEntities();\n this.#updateSceneSettings();\n }, update_interval_in_ms);\n\n this.#broadcast_interval = setInterval(() => {\n this.#broadcastEntities();\n this.#broadcastSceneSettings();\n }, broadcast_interval_in_ms);\n }\n\n /**\n * @internal\n * Stop the update and broadcast loops.\n */\n protected _stopUpdateLoop(): void {\n if (this.#update_interval !== null) {\n clearInterval(this.#update_interval);\n this.#update_interval = null;\n }\n\n if (this.#broadcast_interval !== null) {\n clearInterval(this.#broadcast_interval);\n this.#broadcast_interval = null;\n }\n }\n\n /**\n * @internal\n */\n _updateEntities(): void {\n const update_commands = this.scene._entity_registry._flushDirtyEntities();\n if (update_commands.length > 0) {\n this.#core.updateEntities({ update_commands, persist: false });\n }\n }\n\n /**\n *\n */\n #broadcastEntities = (): void => {\n const update_commands = this.scene._entity_registry._flushPersistentEntities();\n if (update_commands.length > 0) {\n this.#core.updateEntities({ update_commands, persist: true });\n }\n };\n\n /**\n *\n */\n #updateSceneSettings = (): void => {\n const updated_settings = this.scene._settings._getAndClearSettingsToUpdate();\n if (Object.keys(updated_settings).length > 0) {\n this.#core.updateSceneSettings({ updated_settings, persist: false });\n }\n };\n\n /**\n *\n */\n #broadcastSceneSettings = (): void => {\n const updated_settings = this.scene._settings._getAndClearSettingsToBroadcast();\n if (Object.keys(updated_settings).length > 0) {\n this.#core.updateSceneSettings({ updated_settings, persist: true });\n }\n };\n\n /**\n * @internal\n * Install the core event listeners shared by all facades.\n */\n protected _installCoreEventListeners(): void {\n this.#core.addEventListener(\"on-disconnected\", this.session._onDisconnected);\n this.#core.addEventListener(\"on-disconnected\", this.scene._onDisconnected);\n this.#core.addEventListener(\"on-inactivity-warning\", this.session._onInactivityWarning);\n this.#core.addEventListener(\"on-scene-info-loaded\", this.scene._onSceneInfoLoaded);\n this.#core.addEventListener(\"on-activity-detected\", this.session._onActivityDetected);\n this.#core.addEventListener(\"on-entities-created\", this.scene._onEntitiesCreated);\n this.#core.addEventListener(\"on-entities-updated\", this.#onEntitiesUpdated);\n this.#core.addEventListener(\"on-entities-deleted\", this.scene._onEntitiesDeleted);\n this.#core.addEventListener(\"on-entity-visibility-changed\", this.scene._onEntityVisibilityChanged);\n this.#core.addEventListener(\"on-scene-settings-updated\", this.scene._settings._onSceneSettingsUpdated);\n this.#core.addEventListener(\"on-script-event-received\", this.scene._onScriptEventReceived);\n this.#core.addEventListener(\"on-client-connected\", this.#onClientConnectedEvent);\n this.#core.addEventListener(\"on-clients-disconnected\", this.#onClientsDisconnectedEvent);\n this.#core.addEventListener(\"on-asset-loading-status-received\", this.scene._onAssetLoadingStatusReceived);\n }\n\n /**\n * @internal\n * Uninstall the core event listeners shared by all facades.\n */\n protected _uninstallCoreEventListeners(): void {\n this.#core.removeEventListener(\"on-disconnected\", this.session._onDisconnected);\n this.#core.removeEventListener(\"on-disconnected\", this.scene._onDisconnected);\n this.#core.removeEventListener(\"on-inactivity-warning\", this.session._onInactivityWarning);\n this.#core.removeEventListener(\"on-scene-info-loaded\", this.scene._onSceneInfoLoaded);\n this.#core.removeEventListener(\"on-activity-detected\", this.session._onActivityDetected);\n this.#core.removeEventListener(\"on-entities-created\", this.scene._onEntitiesCreated);\n this.#core.removeEventListener(\"on-entities-updated\", this.#onEntitiesUpdated);\n this.#core.removeEventListener(\"on-entities-deleted\", this.scene._onEntitiesDeleted);\n this.#core.removeEventListener(\"on-entity-visibility-changed\", this.scene._onEntityVisibilityChanged);\n this.#core.removeEventListener(\"on-scene-settings-updated\", this.scene._settings._onSceneSettingsUpdated);\n this.#core.removeEventListener(\"on-script-event-received\", this.scene._onScriptEventReceived);\n this.#core.removeEventListener(\"on-client-connected\", this.#onClientConnectedEvent);\n this.#core.removeEventListener(\"on-clients-disconnected\", this.#onClientsDisconnectedEvent);\n this.#core.removeEventListener(\"on-asset-loading-status-received\", this.scene._onAssetLoadingStatusReceived);\n }\n\n /**\n *\n */\n #onEntitiesUpdated = ({ updated_entities, emitter }: Events.EntitiesUpdatedEvent): void => {\n for (const { entity_euid, updated_components, deleted_components } of updated_entities) {\n this.scene._updateEntityFromEvent({ entity_euid, updated_components, deleted_components, emitter });\n }\n };\n\n /**\n *\n */\n #onClientConnectedEvent = ({ client_info }: Events.ClientConnectedEvent): void => {\n this.session._onClientJoined({ core: this, client_info });\n };\n\n /**\n *\n */\n #onClientsDisconnectedEvent = ({ client_ids }: Events.ClientsDisconnectedEvent): void => {\n for (const client_id of client_ids) {\n this.session._onClientLeft({ client_id });\n }\n };\n}\n", "/**\n * @category Utils\n */\nexport class TypedEventTarget> {\n #event_target = new EventTarget();\n\n /**\n *\n */\n addEventListener<_EventName extends keyof EventMap & string>(\n event_name: _EventName,\n listener: (event: EventMap[_EventName]) => void,\n options?: AddEventListenerOptions | boolean,\n ): void {\n this.#event_target.addEventListener(event_name, listener as EventListener, options);\n }\n\n /**\n *\n */\n removeEventListener<_EventName extends keyof EventMap & string>(\n event_name: _EventName,\n listener: (event: EventMap[_EventName]) => void,\n options?: EventListenerOptions | boolean,\n ): void {\n this.#event_target.removeEventListener(event_name, listener as EventListener, options);\n }\n\n /**\n * @internal\n */\n _dispatchEvent(event: EventMap[T]): boolean {\n return this.#event_target.dispatchEvent(event as Event);\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { UUID } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport { ClientInfo } from \"./ClientInfo\";\nimport { LivelinkInstance } from \"../LivelinkInstance\";\n\n/**\n * A client in a session.\n *\n * A client represents an instance of a 3dverse user viewing the session.\n *\n * A user can have multiple clients in the same session.\n *\n * Clients must not be instantiated but can be accessed through the {@link Session} object.\n *\n * A client seen from here has identity only. Everything a client *shows* \u2014 the camera entities it\n * views the scene through, the entity under its mouse pointer \u2014 is carried by the client metadata\n * piggybacked on the video frames, which only a streaming client receives. Those members therefore\n * live on the browser SDK's `Client` subclass; a livelink.agent client never receives frames\n * and would only ever see them empty.\n *\n * @category Session\n */\nexport class Client {\n /**\n * The Livelink core object.\n */\n readonly #core: LivelinkInstance;\n\n /**\n * Information about the client.\n */\n readonly #client_info: ClientInfo;\n\n /**\n * The unique identifier of the session the client is associated with.\n */\n readonly session_id: UUID;\n\n /**\n * The unique identifier of the client.\n */\n get id(): UUID {\n return this.#client_info.client_id;\n }\n\n /**\n * The id of the user that the client is associated with.\n * Note that the same user can have multiple clients in the same session.\n */\n get user_id(): UUID {\n return this.#client_info.user_id;\n }\n\n /**\n * The username of the user that the client is associated with.\n */\n get username(): string {\n return this.#client_info.username;\n }\n\n /**\n * The type of the client.\n */\n get client_type(): \"user\" | \"guest\" | \"api\" | \"unknown\" {\n return this.#client_info.client_type;\n }\n\n /**\n * Indicates if the client is external to the current session.\n */\n get is_external(): boolean {\n return this.#core.session.session_id !== this.session_id;\n }\n\n /**\n * @internal\n */\n constructor({\n core,\n client_info,\n session_id,\n }: {\n core: LivelinkInstance;\n client_info: ClientInfo;\n session_id: UUID;\n }) {\n this.#core = core;\n this.#client_info = client_info;\n this.session_id = session_id;\n }\n}\n", "import { Client } from \"./Client\";\n\n/**\n * Event emitted when the session is disconnected.\n *\n * Dispatched by {@link Session} as `on-disconnected`.\n *\n * @event\n * @noInheritDoc\n * @category Session / Events\n */\nexport class DisconnectedEvent extends Event {\n /**\n * The reason for the disconnection.\n */\n public readonly reason: string;\n\n /**\n * @internal\n */\n constructor({ reason }: { reason: string }) {\n super(\"on-disconnected\");\n this.reason = reason;\n }\n}\n\n/**\n * Event emitted when the client is about to be disconnected due to inactivity.\n *\n * Dispatched by {@link Session} as `on-inactivity-warning`.\n *\n * @event\n * @noInheritDoc\n * @category Session / Events\n */\nexport class InactivityWarningEvent extends Event {\n /**\n * The number of seconds remaining before the client is disconnected.\n */\n public readonly seconds_remaining: number;\n /**\n * Resets the timer for the activity warning.\n */\n public readonly resetTimer: () => void;\n\n /**\n * @internal\n */\n constructor({ seconds_remaining, reset_timer }: { seconds_remaining: number; reset_timer: () => void }) {\n super(\"on-inactivity-warning\");\n this.seconds_remaining = seconds_remaining;\n this.resetTimer = reset_timer;\n }\n}\n\n/**\n * Event emitted when activity is detected after a period of inactivity.\n *\n * Dispatched by {@link Session} as `on-activity-detected`.\n *\n * @event\n * @noInheritDoc\n * @category Session / Events\n */\nexport class ActivityDetectedEvent extends Event {\n /**\n * @internal\n */\n constructor() {\n super(\"on-activity-detected\");\n }\n}\n\n/**\n * Event emitted when a client joins the session.\n *\n * Dispatched by {@link Session} as `on-client-joined`.\n *\n * @event\n * @noInheritDoc\n * @category Session / Events\n */\nexport class ClientJoinedEvent extends Event {\n /**\n * The client that joined the session.\n */\n public readonly client: ClientType;\n\n /**\n * @internal\n */\n constructor({ client }: { client: ClientType }) {\n super(\"on-client-joined\");\n this.client = client;\n }\n}\n\n/**\n * Event emitted when a client leaves the session.\n *\n * Dispatched by {@link Session} as `on-client-left`.\n *\n * @event\n * @noInheritDoc\n * @category Session / Events\n */\nexport class ClientLeftEvent extends Event {\n /**\n * The client that left the session.\n */\n public readonly client: ClientType;\n\n /**\n * @internal\n */\n constructor({ client }: { client: ClientType }) {\n super(\"on-client-left\");\n this.client = client;\n }\n}\n\n/**\n * The events dispatched by {@link Session}.\n *\n * @event\n * @category Session / Events\n */\nexport type SessionEvents = {\n \"on-inactivity-warning\": InactivityWarningEvent;\n \"on-activity-detected\": ActivityDetectedEvent;\n \"on-disconnected\": DisconnectedEvent;\n \"on-client-joined\": ClientJoinedEvent;\n \"on-client-left\": ClientLeftEvent;\n};\n", "//------------------------------------------------------------------------------\nimport type { Events, SessionInterface, UUID } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport { Client } from \"./Client\";\nimport { getApiUrl } from \"../config/api\";\nimport type { LivelinkInstance } from \"../LivelinkInstance\";\nimport { ClientInfo } from \"./ClientInfo\";\nimport { SessionInfo } from \"./SessionInfo\";\nimport { TypedEventTarget } from \"../TypedEventTarget\";\nimport {\n ActivityDetectedEvent,\n ClientJoinedEvent,\n ClientLeftEvent,\n DisconnectedEvent,\n InactivityWarningEvent,\n SessionEvents,\n} from \"./SessionEvents\";\n\n/**\n * @internal\n *\n * A function that selects a session from a list of sessions.\n *\n * @param params\n * @param params.sessions - The list of sessions to select from.\n *\n * @returns The selected session or null if no session was selected.\n *\n * @inline\n */\nexport type SessionSelector = ({ sessions }: { sessions: Array }) => SessionInfo | null;\n\n/**\n * @internal\n *\n * Instance type of a class constructor.\n *\n * Unlike the built-in {@link InstanceType}, this does not constrain `T` to a public constructor,\n * so it works with classes that have a `protected` constructor (like {@link Session}). The instance\n * type is extracted from the constructor's `prototype` property instead of its construct signature.\n *\n * @inline\n */\ntype InstanceOf = T extends { prototype: infer P } ? P : never;\n\n/**\n * @internal\n *\n * Structural class shape used by the polymorphic statics ({@link Session.create} and friends).\n *\n * Only `prototype` (for the instance type, see {@link InstanceOf}) and `_make` are inspected, so\n * the constraint is satisfied by classes with a `protected` constructor and by non-generic\n * subclasses alike. A `T extends typeof Session` constraint would instead compare construct\n * signatures, and a subclass fixing the `ClientType` parameter (like the browser SDK's `Session`)\n * would fail that comparison.\n *\n * @inline\n */\ntype SessionClass = Pick;\n\n/**\n * A session running a scene.\n *\n * A session is a running instance of a 3dverse server rendering a scene that can be joined by\n * multiple clients.\n *\n * A session can be transient or not.\n * A transient session is temporary and changes made to the entities in the scene are not saved.\n *\n * ### Usage\n * This class is not meant to be instantiated directly. Use the static methods to create or find\n * an existing session.\n *\n * A session can be created or joined:\n * - To create a new session, use the {@link Session.create} method.\n * - To find an existing session, use the {@link Session.find} method.\n * - Or if you know the session id, use the {@link Session.findById} method.\n *\n * ### Authentication\n * To create or find a session, you need a valid authentication token that has at least\n * read access to the scene the session will use.\n *\n * See: https://docs.3dverse.com/references/api/generate-user-token\n *\n * ### Events\n * - {@link ClientJoinedEvent} - Fired when a client joins the session.\n * - {@link ClientLeftEvent} - Fired when a client leaves the session.\n * - {@link InactivityWarningEvent} - Fired when the client is inactive for a certain amount of time.\n * - {@link ActivityDetectedEvent} - Fired when the client is active again.\n * - {@link DisconnectedEvent} - Fired when the session is disconnected.\n *\n * See: {@link SessionEvents} for more details.\n *\n * @category Session\n */\nexport class Session\n extends TypedEventTarget>\n implements SessionInterface\n{\n /**\n * @internal\n *\n * Create a new session instance of the class this is called on.\n */\n static _make(\n this: T,\n params: { token: string; session_info: SessionInfo; created: boolean; is_guest?: boolean },\n ): InstanceOf {\n // `this` is the concrete (sub)class; its constructor is protected, so it exposes no\n // structural construct signature \u2014 cast once, here.\n const Ctor = this as unknown as new (params: {\n token: string;\n session_info: SessionInfo;\n created: boolean;\n is_guest?: boolean;\n }) => InstanceOf;\n return new Ctor(params);\n }\n\n /**\n * Create a new session.\n *\n * @param params\n * @param params.scene_id - The unique identifier of the scene the session will launch.\n * @param params.token - The authentication token. This token must have at least read access to the scene.\n * @param params.is_transient - Whether the session is transient. Transient sessions are temporary and changes are not saved.\n *\n * @returns A promise that resolves to the created session.\n *\n * @throws Error if the session could not be created.\n */\n static async create(\n this: T,\n {\n scene_id,\n token,\n is_transient,\n options,\n }: {\n scene_id: UUID;\n token: string;\n is_transient?: boolean;\n options?: Record;\n },\n ): Promise> {\n const res = await fetch(`${getApiUrl()}/sessions`, {\n method: \"POST\",\n body: JSON.stringify({ scene_id, is_transient, options }),\n headers: {\n \"Content-Type\": \"application/json\",\n user_token: token,\n },\n });\n\n if (!res.ok) {\n throw new Error(\"Error when creating session\");\n }\n\n const session_info = (await res.json()) as { session_id: UUID };\n return this._make({\n token,\n session_info: {\n ...session_info,\n scene_id,\n is_transient_session: is_transient ?? false,\n },\n created: true,\n });\n }\n\n /**\n * Create a session instance from a session info, without creating or joining anything server-side.\n *\n * @param params\n * @param params.session_info - The information about the session.\n * @param params.token - The authentication token.\n *\n * @returns The session instance.\n */\n static createFromInfo(\n this: T,\n { session_info, token }: { session_info: SessionInfo; token: string },\n ): InstanceOf {\n return this._make({ token, session_info, created: false });\n }\n\n /**\n * List all existing sessions running the specified scene.\n *\n * @param params\n * @param params.scene_id - The unique identifier of the scene the sessions must be running.\n * @param params.token - The authentication token.\n *\n * @returns A promise that resolves to the list of sessions running the scene, or to an empty\n * list if the sessions could not be listed (a non-OK API response is treated as a legitimate\n * impossibility to list the sessions of the scene, not as an error).\n */\n static async list({ scene_id, token }: { scene_id: UUID; token: string }): Promise> {\n const res = await fetch(`${getApiUrl()}/sessions?filters[scene_id]=${scene_id}`, {\n method: \"GET\",\n headers: {\n user_token: token,\n },\n });\n\n if (!res.ok) {\n console.debug(`Could not list sessions for scene ${scene_id}: ${res.status}.`);\n return [];\n }\n\n return (await res.json()) as Array;\n }\n\n /**\n * Find an existing session running the specified scene.\n *\n * @param params\n * @param params.scene_id - The unique identifier of the scene the session must be running.\n * @param params.token - The authentication token. This token must have at least read access to the scene.\n * @param params.session_selector - A callback that selects a session from a list of candidate sessions.\n *\n * @returns A promise that resolves to the found session, or null if no session was found:\n * no session is running the scene, the session selector selected none, or the sessions could\n * not be listed (see {@link Session.list}).\n */\n static async find(\n this: T,\n {\n scene_id,\n token,\n session_selector,\n }: {\n scene_id: UUID;\n token: string;\n session_selector: SessionSelector;\n },\n ): Promise | null> {\n const sessions = await Session.list({ scene_id, token });\n\n if (sessions.length === 0) {\n return null;\n }\n\n const session_info = session_selector({ sessions });\n if (!session_info) {\n return null;\n }\n\n return this._make({ token, session_info, created: false });\n }\n\n /**\n * Find an existing session by its unique identifier.\n *\n * @param params\n * @param params.session_id - The unique identifier of the session to find.\n * @param params.token - The authentication token. This token must have at least read access to the scene.\n *\n * @returns A promise that resolves to the found session or null if no session was found.\n */\n static async findById(\n this: T,\n {\n session_id,\n token,\n }: {\n session_id: UUID;\n token: string;\n },\n ): Promise | null> {\n const res = await fetch(`${getApiUrl()}/sessions/${session_id}`, {\n method: \"GET\",\n headers: {\n user_token: token,\n },\n });\n\n if (!res.ok) {\n console.debug(`Could not find session with id ${session_id}.`);\n return null;\n }\n\n const session_info = (await res.json()) as SessionInfo;\n return this._make({ token, session_info, created: false });\n }\n\n /**\n * Find the session tied to a guest token.\n *\n * @param params\n * @param params.guest_token - The guest token generated by the [Generate Guest Token](https://docs.3dverse.com/references/api/generate-guest-token) endpoint.\n *\n * @returns A promise that resolves to the found session or null if no session was found.\n */\n static async findByGuestToken(\n this: T,\n { guest_token }: { guest_token: string },\n ): Promise | null> {\n const res = await fetch(`${getApiUrl()}/sessions`, {\n method: \"GET\",\n headers: { guest_token },\n });\n\n if (!res.ok) {\n throw new Error(\"Could not find session as guest, guest token might be expired\");\n }\n\n const [session_info] = (await res.json()) as [SessionInfo];\n return this._make({ token: guest_token, session_info, created: false, is_guest: true });\n }\n\n /**\n * The information about the session.\n */\n public readonly info: SessionInfo;\n\n /**\n * Whether the session has been created or joined by the current client.\n */\n public readonly has_been_created: boolean;\n\n /**\n * The id of the client that is currently connected to the session.\n */\n public client_id: UUID | null = null;\n\n /**\n * The authentication token.\n */\n public readonly token: string;\n\n /**\n * Whether the authentication token is a guest token.\n */\n public readonly is_guest: boolean = false;\n\n /**\n * The address of the gateway the session is running on.\n */\n #gateway_url: string | null = null;\n\n /**\n * The session key used as an authentication method on the gateway.\n */\n #session_key: string | null = null;\n\n /**\n * A map of all connected clients\n */\n #clients: Map = new Map();\n\n /**\n * The unique identifier of the scene the session is running.\n */\n get scene_id(): UUID {\n return this.info.scene_id;\n }\n\n /**\n * The unique identifier of the session.\n */\n get session_id(): UUID {\n return this.info.session_id;\n }\n\n /**\n * The unique identifiers of all clients connected to the session.\n */\n get client_ids(): Array {\n return Array.from(this.#clients.keys());\n }\n\n /**\n * All the clients connected to the session.\n */\n get clients(): Array {\n return Array.from(this.#clients.values());\n }\n\n /**\n * All the clients connected to the session except the current client.\n */\n get other_clients(): Array {\n return Array.from(this.#clients.values()).filter(c => c.id !== this.client_id);\n }\n\n /**\n * The current client connected to the session.\n */\n get current_client(): ClientType | null {\n return this.client_id ? (this.#clients.get(this.client_id) ?? null) : null;\n }\n\n /**\n * @internal\n * The address of the gateway the session is running on.\n */\n get gateway_url(): string | null {\n return this.#gateway_url;\n }\n\n /**\n * @internal\n * The session key used as an authentication method on the gateway.\n */\n get session_key(): string | null {\n return this.#session_key;\n }\n\n /**\n * Authentication headers to be used in requests to the API.\n */\n get #authentication_headers(): Record {\n return this.is_guest ? { guest_token: this.token } : { user_token: this.token };\n }\n\n /**\n * Create a new session.\n *\n * @param params\n * @param params.token - The authentication token. This token must have at least read access to the scene.\n * @param params.session_info - The information about the session.\n * @param params.created - Whether the session has been created or found by the current client.\n */\n protected constructor({\n token,\n session_info,\n created,\n is_guest = false,\n }: {\n token: string;\n session_info: SessionInfo;\n created: boolean;\n is_guest?: boolean;\n }) {\n super();\n\n this.token = token;\n this.info = session_info;\n this.has_been_created = created;\n this.is_guest = is_guest;\n }\n\n /**\n * Whether the session is joinable.\n */\n isJoinable(): boolean {\n return this.#gateway_url !== null && this.#session_key !== null;\n }\n\n /**\n * @internal\n * Get the session key to be used as an authentication method on the gateway.\n */\n async registerClient({ is_headless }: { is_headless: boolean }): Promise {\n const res = await fetch(`${getApiUrl()}/sessions/${this.session_id}/clients`, {\n method: \"POST\",\n headers: { ...this.#authentication_headers, \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ is_headless }),\n });\n\n if (!res.ok) {\n throw new Error(\"Error when registering client to session\");\n }\n\n const { session_token, endpoint_info } = (await res.json()) as {\n session_token: string;\n endpoint_info: { ip: string; port: number; ssl_port: number };\n };\n\n // Gateways that don't support secure connections set their SSL port to 0.\n const protocol = endpoint_info.ssl_port ? \"wss\" : \"ws\";\n const port = endpoint_info.ssl_port !== 0 ? endpoint_info.ssl_port : endpoint_info.port;\n this.#gateway_url = `${protocol}://${endpoint_info.ip}:${port}`;\n this.#session_key = session_token;\n }\n\n /**\n * @internal\n * Close the session.\n */\n async close(): Promise {\n await fetch(`${getApiUrl()}/sessions/${this.session_id}`, {\n method: \"DELETE\",\n headers: this.#authentication_headers,\n });\n }\n\n /**\n * Get a client by its unique identifier.\n *\n * @param params\n * @param params.client_id - The unique identifier of the client to look for.\n *\n * @returns The client or null if the client is not found.\n */\n getClient = ({ client_id }: { client_id: UUID }): ClientType | null => {\n return this.#clients.get(client_id) ?? null;\n };\n\n /**\n * Evict a client from the session.\n *\n * The client will be disconnected.\n *\n * The token used to create the session must have manage access to the scene.\n *\n * Note that nothing prevents the client from reconnecting while the session is still running.\n *\n * @param params\n * @param params.client - The client to evict, either a {@link Client} object or the unique identifier of the client.\n *\n * @returns A promise that resolves to true if the client was evicted, false otherwise.\n */\n async evictClient({ client }: { client: Client | UUID }): Promise {\n const client_id = client instanceof Client ? client.id : client;\n const res = await fetch(`${getApiUrl()}/sessions/${this.session_id}/clients/${client_id}`, {\n method: \"DELETE\",\n headers: this.#authentication_headers,\n });\n\n return res.ok;\n }\n\n /**\n * @internal\n */\n _onDisconnected = (e: Events.DisconnectedEvent): void => {\n this._dispatchEvent(new DisconnectedEvent({ reason: e.reason }));\n };\n\n /**\n * @internal\n */\n _onInactivityWarning = (e: Events.InactivityWarningEvent): void => {\n this._dispatchEvent(\n new InactivityWarningEvent({ seconds_remaining: e.seconds_remaining, reset_timer: e.resetTimer }),\n );\n };\n\n /**\n * @internal\n */\n _onActivityDetected = (_: Events.ActivityDetectedEvent): void => {\n this._dispatchEvent(new ActivityDetectedEvent());\n };\n\n /**\n * @internal\n */\n _onClientJoined({ core, client_info }: { core: LivelinkInstance; client_info: ClientInfo }): void {\n console.debug(\"--- Client joined\", client_info);\n const client = this._instantiateClient({ core, client_info, session_id: this.session_id });\n this.#clients.set(client.id, client);\n if (client.id !== this.client_id) {\n this._dispatchEvent(new ClientJoinedEvent({ client }));\n }\n }\n\n /**\n * @internal\n */\n _onClientLeft({ client_id }: { client_id: UUID }): void {\n const client = this.#clients.get(client_id);\n if (client) {\n this.#clients.delete(client_id);\n this._dispatchEvent(new ClientLeftEvent({ client }));\n }\n }\n\n /**\n * @internal\n */\n _instantiateClient({\n core,\n client_info,\n session_id,\n }: {\n core: LivelinkInstance;\n client_info: ClientInfo;\n session_id: UUID;\n }): ClientType {\n const client = new Client({\n core,\n client_info,\n session_id,\n });\n return client as ClientType;\n }\n}\n", "/**\n * DO NOT EDIT THIS FILE MANUALLY.\n * This file has been generated automatically from ftl-schemas\n */\nimport type { Components, ComponentName, ComponentType, EntityCore } from \"@3dverse/livelink.core\";\nimport { TypedEventTarget } from \"../sources/TypedEventTarget\";\nimport { EntityEvents } from \"../sources/scene/EntityEvents\";\n\n/**\n * If specified as a component value, the default values will be applied.\n * Note that the component default values might change on future versions of their schema.\n *\n * @category Scene\n */\nexport type DefaultValue = \"default\";\n\n/**\n * Storage core shared by every livelink client SDK entity with generated component accessor layer.\n * \n * It owns the raw component record ({@link EntityCore}) and exposes the minimal protected primitives\n * to read/write it. It intentionally does NOT impose a component-access paradigm nor any entity\n * behaviour: the concrete {@link Entity} builds the public API (component accessors, dirty tracking,\n * scripts, \u2026) on top of these primitives.\n * \n * The generated component layer exposes one getter per component returning the live, mutable component object\n * stored on the paradigm-neutral. Reading a component returns the actual stored value, so it may be mutated in place;\n * mutations are not auto-detected \u2014 flag them explicitly with {@link Entity.updateComponent} / {@link Entity.updateComponents}. \n * Use {@link Entity.deleteComponent} to remove a component. The generated layer also exposes one setter per component \n * that delegates to the core's {@link Entity.updateComponent} & {@link Entity.deleteComponent}.\n * \n * @category Scene\n */\nexport abstract class EntityComponents extends TypedEventTarget {\n /**\n * @internal\n */\n public static readonly component_names: Array = [\n \"animation_controller\",\n \"animation_sequence_controller\",\n \"bone\",\n \"box_geometry\",\n \"camera\",\n \"capsule_geometry\",\n \"character_controller\",\n \"collision_geometry_ref\",\n \"constraint\",\n \"constraint_actuator\",\n \"culling_geometry\",\n \"custom_lens\",\n \"cylinder_geometry\",\n \"debug_name\",\n \"decal_projector\",\n \"environment\",\n \"joint\",\n \"label\",\n \"lineage\",\n \"local_aabb\",\n \"material\",\n \"material_ref\",\n \"measure\",\n \"mesh_ref\",\n \"morph_targets\",\n \"orthographic_lens\",\n \"overrider\",\n \"perspective_lens\",\n \"physics_material\",\n \"plane_geometry\",\n \"point_cloud_ref\",\n \"point_light\",\n \"reflection_probe\",\n \"rigid_body\",\n \"rigid_body_actuator\",\n \"scene_ref\",\n \"script_map\",\n \"shadow_caster\",\n \"skeleton_ref\",\n \"sound_ref\",\n \"sphere_geometry\",\n \"spline\",\n \"spot_light\",\n \"tags\",\n \"vehicle_controller\",\n \"volume_filter\",\n \"volume_material_ref\",\n \"volume_ref\",\n ];\n\n /**\n *\n */\n #core: EntityCore;\n\n /**\n * @internal\n */\n get _core(): EntityCore {\n return this.#core;\n }\n\n /**\n *\n */\n get euid(): Readonly {\n return this.#core.euid;\n }\n\n /**\n * Drives skeletal animation using an Animation Graph and Animation Set; animates descendant skinned meshes whose skeletons are compatible with the set.\n */\n get animation_controller() : Components.AnimationController | undefined {\n return this._unsafeGetComponentValue({ component_name: \"animation_controller\" }) as Components.AnimationController | undefined;\n }\n \n set animation_controller(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"animation_controller\", value});\n }\n\n /**\n * Controls playback of an Animation Sequence; assigns tracks to entities.\n */\n get animation_sequence_controller() : Components.AnimationSequenceController | undefined {\n return this._unsafeGetComponentValue({ component_name: \"animation_sequence_controller\" }) as Components.AnimationSequenceController | undefined;\n }\n \n set animation_sequence_controller(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"animation_sequence_controller\", value});\n }\n\n /**\n * Associates this entity with a bone in a skeleton (for attachments and transforms).\n */\n get bone() : Components.Bone | undefined {\n return this._unsafeGetComponentValue({ component_name: \"bone\" }) as Components.Bone | undefined;\n }\n \n set bone(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"bone\", value});\n }\n\n /**\n * Box geometry.\n */\n get box_geometry() : Components.BoxGeometry | undefined {\n return this._unsafeGetComponentValue({ component_name: \"box_geometry\" }) as Components.BoxGeometry | undefined;\n }\n \n set box_geometry(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"box_geometry\", value});\n }\n\n /**\n * Virtual camera.\n */\n get camera() : Components.Camera | undefined {\n return this._unsafeGetComponentValue({ component_name: \"camera\" }) as Components.Camera | undefined;\n }\n \n set camera(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"camera\", value});\n }\n\n /**\n * Capsule geometry.\n */\n get capsule_geometry() : Components.CapsuleGeometry | undefined {\n return this._unsafeGetComponentValue({ component_name: \"capsule_geometry\" }) as Components.CapsuleGeometry | undefined;\n }\n \n set capsule_geometry(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"capsule_geometry\", value});\n }\n\n /**\n * Kinematic character controller for collision-constrained movement without a rigid body. Uses tuned collision handling for responsive control.\n */\n get character_controller() : Components.CharacterController | undefined {\n return this._unsafeGetComponentValue({ component_name: \"character_controller\" }) as Components.CharacterController | undefined;\n }\n \n set character_controller(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"character_controller\", value});\n }\n\n /**\n * Reference to a collision geometry asset used by physics.\n */\n get collision_geometry_ref() : Components.CollisionGeometryRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"collision_geometry_ref\" }) as Components.CollisionGeometryRef | undefined;\n }\n \n set collision_geometry_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"collision_geometry_ref\", value});\n }\n\n /**\n * 6-DoF constraint built on a Joint. Defaults to fixed; selectively unlock translation and rotation on X/Y/Z and configure limits and springs.\n */\n get constraint() : Components.Constraint | undefined {\n return this._unsafeGetComponentValue({ component_name: \"constraint\" }) as Components.Constraint | undefined;\n }\n \n set constraint(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"constraint\", value});\n }\n\n /**\n * Drives a Constraint toward target position/orientation and velocities using configurable stiffness, damping, and force limits.\n */\n get constraint_actuator() : Components.ConstraintActuator | undefined {\n return this._unsafeGetComponentValue({ component_name: \"constraint_actuator\" }) as Components.ConstraintActuator | undefined;\n }\n \n set constraint_actuator(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"constraint_actuator\", value});\n }\n\n /**\n * Enables culling using a simple analytic shape. Add alongside a geometry component (box, cylinder, plane, sphere).\n */\n get culling_geometry() : Components.CullingGeometry | undefined {\n return this._unsafeGetComponentValue({ component_name: \"culling_geometry\" }) as Components.CullingGeometry | undefined;\n }\n \n set culling_geometry(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"culling_geometry\", value});\n }\n\n /**\n * Custom projection lens using an explicit projection matrix.\n */\n get custom_lens() : Components.CustomLens | undefined {\n return this._unsafeGetComponentValue({ component_name: \"custom_lens\" }) as Components.CustomLens | undefined;\n }\n \n set custom_lens(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"custom_lens\", value});\n }\n\n /**\n * Cylinder geometry.\n */\n get cylinder_geometry() : Components.CylinderGeometry | undefined {\n return this._unsafeGetComponentValue({ component_name: \"cylinder_geometry\" }) as Components.CylinderGeometry | undefined;\n }\n \n set cylinder_geometry(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"cylinder_geometry\", value});\n }\n\n /**\n * Human-readable name of the entity.\n */\n get debug_name() : Components.DebugName | undefined {\n return this._unsafeGetComponentValue({ component_name: \"debug_name\" }) as Components.DebugName | undefined;\n }\n \n set debug_name(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"debug_name\", value});\n }\n\n /**\n * Projects a material onto scene surfaces within the projector's box volume.\n */\n get decal_projector() : Components.DecalProjector | undefined {\n return this._unsafeGetComponentValue({ component_name: \"decal_projector\" }) as Components.DecalProjector | undefined;\n }\n \n set decal_projector(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"decal_projector\", value});\n }\n\n /**\n * Scene environment settings, including skybox background and precomputed image-based lighting (IBL). This component is only applied in the scene where this entity lives, it is discarded for subscenes.\n */\n get environment() : Components.Environment | undefined {\n return this._unsafeGetComponentValue({ component_name: \"environment\" }) as Components.Environment | undefined;\n }\n \n set environment(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"environment\", value});\n }\n\n /**\n * Base joint connecting two bodies. By default locks relative position and orientation between constrainer and constrainee.\n */\n get joint() : Components.Joint | undefined {\n return this._unsafeGetComponentValue({ component_name: \"joint\" }) as Components.Joint | undefined;\n }\n \n set joint(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"joint\", value});\n }\n\n /**\n * Displays an editor-only label in the 3D view.\n */\n get label() : Components.Label | undefined {\n return this._unsafeGetComponentValue({ component_name: \"label\" }) as Components.Label | undefined;\n }\n \n set label(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"label\", value});\n }\n\n /**\n * Records the entity's lineage through linkers and parentage.\n */\n get lineage() : Components.Lineage | undefined {\n return this._unsafeGetComponentValue({ component_name: \"lineage\" }) as Components.Lineage | undefined;\n }\n \n set lineage(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"lineage\", value});\n }\n\n /**\n * Local-space axis-aligned bounding box.\n */\n get local_aabb() : Components.LocalAabb | undefined {\n return this._unsafeGetComponentValue({ component_name: \"local_aabb\" }) as Components.LocalAabb | undefined;\n }\n \n set local_aabb(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"local_aabb\", value});\n }\n\n /**\n * Assigns a shader to the entity's mesh and provides its input values and specialization constants.\n */\n get material() : Components.Material | undefined {\n return this._unsafeGetComponentValue({ component_name: \"material\" }) as Components.Material | undefined;\n }\n \n set material(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"material\", value});\n }\n\n /**\n * Reference to a material to use for rendering.\n */\n get material_ref() : Components.MaterialRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"material_ref\" }) as Components.MaterialRef | undefined;\n }\n \n set material_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"material_ref\", value});\n }\n\n /**\n * Displays editor-only measurement annotations in the 3D view.\n */\n get measure() : Components.Measure | undefined {\n return this._unsafeGetComponentValue({ component_name: \"measure\" }) as Components.Measure | undefined;\n }\n \n set measure(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"measure\", value});\n }\n\n /**\n * Reference to a mesh to render (with submesh selection).\n */\n get mesh_ref() : Components.MeshRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"mesh_ref\" }) as Components.MeshRef | undefined;\n }\n \n set mesh_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"mesh_ref\", value});\n }\n\n /**\n * Contains weights assigned to morph targets of the mesh referred to by the entity's mesh_ref.\n */\n get morph_targets() : Components.MorphTargets | undefined {\n return this._unsafeGetComponentValue({ component_name: \"morph_targets\" }) as Components.MorphTargets | undefined;\n }\n \n set morph_targets(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"morph_targets\", value});\n }\n\n /**\n * Orthographic projection lens with configurable zoom and depth range.\n */\n get orthographic_lens() : Components.OrthographicLens | undefined {\n return this._unsafeGetComponentValue({ component_name: \"orthographic_lens\" }) as Components.OrthographicLens | undefined;\n }\n \n set orthographic_lens(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"orthographic_lens\", value});\n }\n\n /**\n * Overrides an entity from a subscene: mark for deletion, replace components, or detach specific components.\n */\n get overrider() : Components.Overrider | undefined {\n return this._unsafeGetComponentValue({ component_name: \"overrider\" }) as Components.Overrider | undefined;\n }\n \n set overrider(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"overrider\", value});\n }\n\n /**\n * Perspective projection lens with vertical field of view and near/far clipping planes.\n */\n get perspective_lens() : Components.PerspectiveLens | undefined {\n return this._unsafeGetComponentValue({ component_name: \"perspective_lens\" }) as Components.PerspectiveLens | undefined;\n }\n \n set perspective_lens(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"perspective_lens\", value});\n }\n\n /**\n * Physical surface properties used for contact: friction, restitution, optional contact modification, and trigger mode.\n */\n get physics_material() : Components.PhysicsMaterial | undefined {\n return this._unsafeGetComponentValue({ component_name: \"physics_material\" }) as Components.PhysicsMaterial | undefined;\n }\n \n set physics_material(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"physics_material\", value});\n }\n\n /**\n * Infinite plane geometry.\n */\n get plane_geometry() : Components.PlaneGeometry | undefined {\n return this._unsafeGetComponentValue({ component_name: \"plane_geometry\" }) as Components.PlaneGeometry | undefined;\n }\n \n set plane_geometry(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"plane_geometry\", value});\n }\n\n /**\n * Reference to a point cloud.\n */\n get point_cloud_ref() : Components.PointCloudRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"point_cloud_ref\" }) as Components.PointCloudRef | undefined;\n }\n \n set point_cloud_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"point_cloud_ref\", value});\n }\n\n /**\n * Omnidirectional light source with physically based intensity and falloff. Acts as a point light by default; enable isDirectional to emit parallel rays. Attach a Spot Light component to add a cone cutoff. Can optionally drive the atmosphere sun direction.\n */\n get point_light() : Components.PointLight | undefined {\n return this._unsafeGetComponentValue({ component_name: \"point_light\" }) as Components.PointLight | undefined;\n }\n \n set point_light(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"point_light\", value});\n }\n\n /**\n * Omnidirectional reflection probe that captures the local environment into a cubemap for specular reflections (IBL).\n */\n get reflection_probe() : Components.ReflectionProbe | undefined {\n return this._unsafeGetComponentValue({ component_name: \"reflection_probe\" }) as Components.ReflectionProbe | undefined;\n }\n \n set reflection_probe(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"reflection_probe\", value});\n }\n\n /**\n * Rigid body parameters for dynamic simulation (mass, damping, limits, CCD, and kinematic/gravity behavior).\n */\n get rigid_body() : Components.RigidBody | undefined {\n return this._unsafeGetComponentValue({ component_name: \"rigid_body\" }) as Components.RigidBody | undefined;\n }\n \n set rigid_body(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"rigid_body\", value});\n }\n\n /**\n * Frame-by-frame actuator for rigid bodies. Sets velocities and applies forces/impulses/torques; values are reset each frame.\n */\n get rigid_body_actuator() : Components.RigidBodyActuator | undefined {\n return this._unsafeGetComponentValue({ component_name: \"rigid_body_actuator\" }) as Components.RigidBodyActuator | undefined;\n }\n \n set rigid_body_actuator(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"rigid_body_actuator\", value});\n }\n\n /**\n * Reference to a subscene (linker); used to compose scenes.\n */\n get scene_ref() : Components.SceneRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"scene_ref\" }) as Components.SceneRef | undefined;\n }\n \n set scene_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"scene_ref\", value});\n }\n\n /**\n * Holds a set of script elements keyed by UUID.\n */\n get script_map() : Components.ScriptMap | undefined {\n return this._unsafeGetComponentValue({ component_name: \"script_map\" }) as Components.ScriptMap | undefined;\n }\n \n set script_map(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"script_map\", value});\n }\n\n /**\n * Enables a light to cast real-time shadows with configurable map resolution, depth range, and (for directional lights) cascades.\n */\n get shadow_caster() : Components.ShadowCaster | undefined {\n return this._unsafeGetComponentValue({ component_name: \"shadow_caster\" }) as Components.ShadowCaster | undefined;\n }\n \n set shadow_caster(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"shadow_caster\", value});\n }\n\n /**\n * Reference to a skeleton asset for skinning and animation.\n */\n get skeleton_ref() : Components.SkeletonRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"skeleton_ref\" }) as Components.SkeletonRef | undefined;\n }\n \n set skeleton_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"skeleton_ref\", value});\n }\n\n /**\n * Reference to a sound asset with playback and spatialization controls.\n */\n get sound_ref() : Components.SoundRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"sound_ref\" }) as Components.SoundRef | undefined;\n }\n \n set sound_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"sound_ref\", value});\n }\n\n /**\n * Sphere geometry.\n */\n get sphere_geometry() : Components.SphereGeometry | undefined {\n return this._unsafeGetComponentValue({ component_name: \"sphere_geometry\" }) as Components.SphereGeometry | undefined;\n }\n \n set sphere_geometry(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"sphere_geometry\", value});\n }\n\n /**\n * Displays an editor-only spline in the 3D view.\n */\n get spline() : Components.Spline | undefined {\n return this._unsafeGetComponentValue({ component_name: \"spline\" }) as Components.Spline | undefined;\n }\n \n set spline(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"spline\", value});\n }\n\n /**\n * Adds a cone cutoff to a light, producing a spotlight. Requires a Point Light component for color/intensity and falloff.\n */\n get spot_light() : Components.SpotLight | undefined {\n return this._unsafeGetComponentValue({ component_name: \"spot_light\" }) as Components.SpotLight | undefined;\n }\n \n set spot_light(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"spot_light\", value});\n }\n\n /**\n * Free-form tags used to group and filter entities.\n */\n get tags() : Components.Tags | undefined {\n return this._unsafeGetComponentValue({ component_name: \"tags\" }) as Components.Tags | undefined;\n }\n \n set tags(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"tags\", value});\n }\n\n /**\n * Vehicle Controller parameters.\n */\n get vehicle_controller() : Components.VehicleController | undefined {\n return this._unsafeGetComponentValue({ component_name: \"vehicle_controller\" }) as Components.VehicleController | undefined;\n }\n \n set vehicle_controller(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"vehicle_controller\", value});\n }\n\n /**\n * View filtering and display controls applied to the referenced volume.\n */\n get volume_filter() : Components.VolumeFilter | undefined {\n return this._unsafeGetComponentValue({ component_name: \"volume_filter\" }) as Components.VolumeFilter | undefined;\n }\n \n set volume_filter(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"volume_filter\", value});\n }\n\n /**\n * Reference to the volume material used for shading and transfer functions.\n */\n get volume_material_ref() : Components.VolumeMaterialRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"volume_material_ref\" }) as Components.VolumeMaterialRef | undefined;\n }\n \n set volume_material_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"volume_material_ref\", value});\n }\n\n /**\n * Reference to a volumetric dataset stored as a 3D texture (voxels).\n */\n get volume_ref() : Components.VolumeRef | undefined {\n return this._unsafeGetComponentValue({ component_name: \"volume_ref\" }) as Components.VolumeRef | undefined;\n }\n \n set volume_ref(value: Partial | DefaultValue | undefined) {\n this._setComponentValue({component_name: \"volume_ref\", value});\n }\n\n /**\n *\n */\n constructor({ euid }: { euid: Components.Euid }) {\n super();\n this.#core = { euid };\n }\n\n /**\n *\n */\n toJSON(): object {\n const { euid, ...components } = this.#core;\n return { euid: { value: euid.value }, ...components };\n }\n\n /**\n * @internal\n */\n protected _unsafeSetComponentValue<_ComponentName extends ComponentName>({\n component_name,\n value,\n }: {\n component_name: _ComponentName;\n value: ComponentType<_ComponentName> | undefined;\n }): void {\n //@ts-expect-error: sssh go back to sleep\n this.#core[component_name] = value;\n }\n\n /**\n * @internal\n */\n protected _unsafeGetComponentValue<_ComponentName extends ComponentName>({\n component_name,\n }: {\n component_name: _ComponentName;\n }): ComponentType<_ComponentName> | undefined {\n //@ts-expect-error: sssh go back to sleep\n return this.#core[component_name];\n }\n\n /**\n * @internal\n */\n protected abstract _setComponentValue<_ComponentName extends ComponentName>({\n component_name,\n value,\n }: {\n component_name: _ComponentName;\n value: Partial> | DefaultValue | undefined;\n }): void;\n}\n", "import type { ComponentName } from \"@3dverse/livelink.core\";\nimport { EditionEvent } from \"../EditionEvent\";\nimport { Client } from \"../session/Client\";\n\n/**\n * The event that is fired when an entity is updated, either by adding, modifying or removing\n * components.\n *\n * Dispatched by {@link Entity} as `on-entity-updated`.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class EntityUpdatedEvent extends EditionEvent {\n /**\n * @deprecated\n *\n * Use {@link EditionEvent.isLocal} and {@link EditionEvent.isExternal} instead.\n *\n * The source of the change.\n * - \"external\": The change was made by another user from another instance of the app or even another app.\n * - \"internal\": The change was made by the current app.\n */\n public readonly change_source: \"local\" | \"external\";\n\n /**\n * The names of the components that were added.\n */\n public readonly new_components: Array;\n\n /**\n * The names of the components that were updated.\n */\n public readonly updated_components: Array;\n\n /**\n * The names of the components that were removed.\n */\n public readonly deleted_components: Array;\n\n /**\n *\n */\n isAnyComponentDirty({ components }: { components: Array }): boolean {\n return (\n this.new_components.some(component => components.includes(component)) ||\n this.updated_components.some(component => components.includes(component)) ||\n this.deleted_components.some(component => components.includes(component))\n );\n }\n\n /**\n * @internal\n */\n constructor({\n emitter,\n new_components,\n updated_components,\n deleted_components,\n }: {\n emitter: Client | null;\n new_components: Array;\n updated_components: Array;\n deleted_components: Array;\n }) {\n super(\"on-entity-updated\", emitter);\n this.change_source = emitter ? \"external\" : \"local\";\n this.new_components = new_components;\n this.updated_components = updated_components;\n this.deleted_components = deleted_components;\n }\n\n /**\n * Checks if the event includes any of the specified components, whether they were added, updated or removed.\n */\n includes(...components: ComponentName[]): boolean {\n return components.some(\n component =>\n this.new_components.includes(component) ||\n this.updated_components.includes(component) ||\n this.deleted_components.includes(component),\n );\n }\n}\n\n/**\n * The event that is fired when the entity visibility changes.\n *\n * Dispatched by {@link Entity} as `on-entity-visibility-changed`.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class EntityVisibilityChangedEvent extends Event {\n /**\n * The source of the change.\n * - \"external\": The visibility change was made by another user from another instance of the app or even another app.\n * - \"internal\": The visibility change was made by the current app.\n */\n public readonly change_source: \"local\" | \"external\";\n\n /**\n * The new visibility state of the entity.\n */\n public readonly is_visible: boolean;\n\n /**\n * @internal\n */\n constructor({ change_source, is_visible }: { change_source: \"local\" | \"external\"; is_visible: boolean }) {\n super(\"on-entity-visibility-changed\");\n this.change_source = change_source;\n this.is_visible = is_visible;\n }\n}\n\n/**\n * The events dispatched by {@link Entity}.\n *\n * @event\n * @category Scene / Events\n */\nexport type EntityEvents = {\n \"on-entity-updated\": EntityUpdatedEvent;\n \"on-entity-visibility-changed\": EntityVisibilityChangedEvent;\n};\n", "import { RTID, ScriptDataObject } from \"@3dverse/livelink.core\";\nimport type { Entity } from \"./Entity\";\nimport type { SceneScriptEventInterface } from \"./Scene\";\n\n/**\n * The event that is fired when an entity receives a script event.\n *\n * Dispatched by the entity the script targets \u2014 listen with its `addScriptEventListener` method,\n * whose `onReceived` callback takes this event. The event name is the script event's own\n * `/` id, not a fixed key.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class ScriptEventReceived extends Event {\n /**\n * The entity that emitted the script event.\n */\n readonly emitter_entity: Entity | null;\n\n /**\n * The data object associated with the script event.\n */\n readonly data_object: ScriptDataObject;\n\n /**\n * @internal\n */\n constructor({\n event_name,\n emitter_entity,\n data_object,\n }: {\n event_name: string;\n emitter_entity: Entity | null;\n data_object: ScriptDataObject;\n }) {\n super(event_name);\n this.emitter_entity = emitter_entity;\n this.data_object = data_object;\n }\n}\n\n/**\n * The event that is fired when an entity emits a script event.\n *\n * Dispatched by the emitting entity \u2014 listen with its `addScriptEventListener` method, whose\n * `onEmitted` callback takes this event. The event name is the script event's own\n * `/` id, not a fixed key.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class ScriptEventEmitted extends Event {\n /**\n * The entity that emitted the script event.\n */\n readonly emitter_entity: Entity;\n\n /**\n * The data object associated with the script event.\n */\n readonly data_object: ScriptDataObject;\n\n /**\n *\n */\n #scene: SceneScriptEventInterface;\n\n /**\n *\n */\n #target_rtids: Array;\n\n /**\n *\n */\n #target_entities: Promise> | null = null;\n\n /**\n * The entities that are targeted by the script event.\n * @returns A promise that resolves to an array of entities or null if the entity could not be found.\n */\n get target_entities(): Promise> {\n if (!this.#target_entities) {\n this.#target_entities = Promise.all(\n this.#target_rtids.map(entity_rtid => this.#scene._findEntity({ entity_rtid })),\n );\n }\n return this.#target_entities;\n }\n\n /**\n * @internal\n */\n constructor({\n scene,\n event_name,\n emitter_entity,\n target_rtids,\n data_object,\n }: {\n scene: SceneScriptEventInterface;\n event_name: string;\n emitter_entity: Entity;\n target_rtids: Array;\n data_object: ScriptDataObject;\n }) {\n super(event_name);\n this.#scene = scene;\n this.emitter_entity = emitter_entity;\n this.#target_rtids = target_rtids;\n this.data_object = data_object;\n }\n}\n\n/**\n * @internal\n * @event\n * @category Scene / Events\n */\nexport type ScriptEvents = {\n [event_id: string]: T;\n};\n", "import { copySign } from \".\";\nimport type { Quat, Vec3 } from \"@3dverse/livelink.core\";\n\n/**\n * @internal\n */\nexport function quaternionToEuler([x, y, z, w]: Quat): Vec3 {\n const euler = { roll: 0.0, pitch: 0.0, yaw: 0.0 };\n const q = { x, y, z, w };\n\n // roll (x-axis rotation)\n const sinr_cosp = +2.0 * (q.w * q.x + q.y * q.z);\n const cosr_cosp = +1.0 - 2.0 * (q.x * q.x + q.y * q.y);\n euler.roll = Math.atan2(sinr_cosp, cosr_cosp);\n\n // pitch (y-axis rotation)\n const sinp = +2.0 * (q.w * q.y - q.z * q.x);\n if (Math.abs(sinp) >= 1) {\n euler.pitch = copySign(Math.PI / 2, sinp); // use 90 degrees if out of range: ;\n } else {\n euler.pitch = Math.asin(sinp);\n }\n\n // yaw (z-axis rotation)\n const siny_cosp = +2.0 * (q.w * q.z + q.x * q.y);\n const cosy_cosp = +1.0 - 2.0 * (q.y * q.y + q.z * q.z);\n euler.yaw = Math.atan2(siny_cosp, cosy_cosp);\n\n return [euler.roll, euler.pitch, euler.yaw].map(radian => (radian * 180.0) / Math.PI) as Vec3;\n}\n\n/**\n * @internal\n */\nexport function quaternionFromEuler(eulers: Vec3): Quat {\n const [roll, pitch, yaw] = eulers.map(degree => (degree * Math.PI) / 180.0);\n\n const cy = Math.cos(yaw / 2);\n const sy = Math.sin(yaw / 2);\n const cp = Math.cos(pitch / 2);\n const sp = Math.sin(pitch / 2);\n const cr = Math.cos(roll / 2);\n const sr = Math.sin(roll / 2);\n\n return [\n cy * cp * sr - sy * sp * cr,\n sy * cp * sr + cy * sp * cr,\n sy * cp * cr - cy * sp * sr,\n cy * cp * cr + sy * sp * sr,\n ];\n}\n", "export * from \"./quaternion\";\n\n/**\n * @internal\n */\nexport function copySign(a: number, b: number): number {\n return b < 0 ? -Math.abs(a) : Math.abs(a);\n}\n", "//------------------------------------------------------------------------------\nimport type {\n ComponentName,\n RTID,\n UUID,\n ComponentType,\n EntityCore,\n ComponentsManifest,\n ComponentsRecord,\n ScriptDataObject,\n Events,\n Quat,\n Vec3,\n} from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport { EntityComponents, type DefaultValue } from \"../../_prebuild/EntityComponents\";\n\n//------------------------------------------------------------------------------\nimport type { EntityCreationOptions, SceneEntityInterface } from \"./Scene\";\nimport { EntityUpdatedEvent, EntityVisibilityChangedEvent } from \"./EntityEvents\";\nimport { ScriptEventEmitted, ScriptEventReceived, ScriptEvents } from \"./ScriptEvents\";\nimport { TypedEventTarget } from \"../TypedEventTarget\";\nimport { quaternionFromEuler, quaternionToEuler } from \"../maths\";\n\n/**\n * An entity in a scene.\n *\n * An entity is a collection of components.\n *\n * Components are accessed through explicit methods: getComponent() returns the current value of a component, while\n * updateComponent() and updateComponents() mark the component as dirty and send its current value to the server on the\n * next update. The deleteComponent() method marks the component as deleted and sends this information to the server.\n *\n * All relevant modifications to entities are batched and automatically sent to the server and\n * broadcasted to other clients if the `auto_broadcast` property is set to \"on\".\n *\n * On top of providing direct access to the components, this class provides helper methods to\n * retrieve the parent entity and the children entities.\n *\n * This class cannot be instantiated directly.\n * Use the {@link SceneBase.newEntity} or {@link SceneBase.newEntities} methods on an existing scene to\n * create an entity.\n *\n * @category Scene\n */\nexport class Entity extends EntityComponents {\n /**\n *\n */\n readonly #scene: SceneEntityInterface;\n\n /**\n *\n */\n readonly #dirty_components = new Set();\n\n /**\n *\n */\n readonly #deleted_components = new Set();\n\n /**\n * Last-known-synchronized rotation pair of the `local_transform` component, stored as value\n * copies (never references into the live component). Used by the mutate-then-flag path to\n * detect which rotation representation the caller mutated, so the other one can be recomputed\n * (see {@link Entity.updateComponent}).\n */\n #rotation_shadow: { orientation: Quat; eulerOrientation: Vec3 } | null = null;\n\n /**\n *\n */\n readonly #script_event_received_event_target = new TypedEventTarget>();\n\n /**\n *\n */\n readonly #script_event_emitted_event_target = new TypedEventTarget>();\n\n /**\n * @deprecated\n */\n #auto_broadcast: boolean = true;\n\n /**\n *\n */\n #is_visible: boolean = true;\n\n /**\n *\n */\n #children_rtid: Array = [];\n\n /**\n *\n */\n #parent: Entity | null = null;\n\n /**\n * @internal\n */\n get children_rtid(): Array {\n return this.#children_rtid;\n }\n\n /**\n * @internal\n */\n get rtid(): RTID {\n return this.euid.rtid;\n }\n\n /**\n * The UUID of the entity.\n *\n * Note that multiple entities can share the same UUID if they are different instances of the\n * same entity brought by multiple instances of the same scene.\n */\n get id(): UUID {\n return this.euid.value;\n }\n\n /**\n * The name of the entity.\n */\n get name(): string {\n return this.debug_name?.value ?? \"\";\n }\n\n /**\n * @deprecated\n * Whether the entity has its components updates broadcasted to other clients.\n */\n get auto_broadcast(): boolean {\n return this.#auto_broadcast;\n }\n\n /**\n * @deprecated\n * Set whether the entity has its components updates broadcasted to other clients.\n */\n set auto_broadcast(state: boolean) {\n this.#auto_broadcast = state;\n if (state === false) {\n this.#scene._entity_registry._removeEntityFromBroadcastList({ entity: this });\n }\n }\n\n /**\n * Whether the entity is visible.\n */\n get is_visible(): boolean {\n return this.#is_visible;\n }\n\n /**\n * Set whether the entity is visible.\n */\n set is_visible(is_visible: boolean) {\n this.#scene._setEntityVisibility({ entity_rtid: this.rtid, is_visible });\n this.#is_visible = is_visible;\n this._dispatchEvent(new EntityVisibilityChangedEvent({ is_visible, change_source: \"local\" }));\n }\n\n /**\n * The parent entity of this entity or null if it has no parent.\n */\n get parent(): Entity | null {\n return this.#parent;\n }\n\n /**\n * Re-parent the entity by setting a parent entity.\n */\n set parent(parent: Entity | null) {\n if (parent) {\n let current: Entity | null = parent;\n while (current) {\n if (current === this) {\n throw new Error(\"Cannot reparent an entity to itself or one of its children\");\n }\n current = current.parent;\n }\n }\n\n this._set_parent(parent);\n const lineage = this.lineage;\n this.updateComponent(\"lineage\", {\n parentUUID: parent ? parent.id : \"00000000-0000-0000-0000-000000000000\",\n value: lineage?.value ?? [],\n });\n this.#scene._onEntityReparented();\n }\n\n /**\n * @internal\n */\n get _dirty_components(): Array {\n return Array.from(this.#dirty_components);\n }\n\n /**\n * @internal\n */\n get _deleted_components(): Array {\n return Array.from(this.#deleted_components);\n }\n\n /**\n * @internal\n */\n constructor({\n scene,\n parent = null,\n components,\n options,\n is_visible = true,\n children_rtid = [],\n }: {\n scene: SceneEntityInterface;\n parent: Entity | null;\n components: EntityCore;\n options?: EntityCreationOptions;\n is_visible?: boolean;\n children_rtid?: Array;\n }) {\n super({ euid: components.euid });\n\n this.#parent = parent;\n this.#scene = scene;\n this.#is_visible = is_visible;\n this.#children_rtid = children_rtid;\n // Call the private (non-virtual) applier so subclasses don't run overridden hooks before\n // their own fields are initialized.\n this.#applyComponents({ components });\n this.#scene._entity_registry.add({ entity: this });\n\n if (!options) {\n return;\n }\n\n if (options.auto_broadcast !== undefined) {\n this.auto_broadcast = options.auto_broadcast;\n }\n }\n\n /**\n * Returns the children of this entity.\n */\n async getChildren(): Promise {\n return await this.#scene._getChildren({ entity: this });\n }\n\n /**\n * Add an event listener for a script event.\n * Script events are triggered by the server when a script attached to an entity emits an event.\n *\n * @param params\n * @param params.event_map_id - The ID of the event map.\n * @param params.event_name - The name of the event.\n * @param params.onReceived - The callback to be called when the current entity is targetted by the script event.\n * @param params.onEmitted - The callback to be called when the current entity emits the script event.\n */\n addScriptEventListener({\n event_map_id,\n event_name,\n onReceived,\n onEmitted,\n }: {\n event_map_id: UUID;\n event_name: string;\n onReceived?: (evt: ScriptEventReceived) => void;\n onEmitted?: (evt: ScriptEventEmitted) => void;\n }): void {\n if (onReceived) {\n this.#script_event_received_event_target.addEventListener(event_map_id + \"/\" + event_name, onReceived);\n }\n\n if (onEmitted) {\n this.#script_event_emitted_event_target.addEventListener(event_map_id + \"/\" + event_name, onEmitted);\n }\n }\n\n /**\n * Remove an event listener for a script event.\n *\n * @param params\n * @param params.event_map_id - The ID of the event map.\n * @param params.event_name - The name of the event.\n * @param params.onReceived - A previously registered callback.\n * @param params.onEmitted - A previously registered callback.\n */\n removeScriptEventListener({\n event_map_id,\n event_name,\n onReceived,\n onEmitted,\n }: {\n event_map_id: UUID;\n event_name: string;\n onReceived?: (evt: ScriptEventReceived) => void;\n onEmitted?: (evt: ScriptEventEmitted) => void;\n }): void {\n if (onReceived) {\n this.#script_event_received_event_target.removeEventListener(event_map_id + \"/\" + event_name, onReceived);\n }\n\n if (onEmitted) {\n this.#script_event_emitted_event_target.removeEventListener(event_map_id + \"/\" + event_name, onEmitted);\n }\n }\n\n /**\n * @experimental\n */\n async assignClientToScripts({ client_uuid }: { client_uuid: UUID }): Promise {\n if (!this.script_map || !this.script_map.elements) {\n throw new Error(\"Entity has no scripts\");\n }\n const script_ids = Object.keys(this.script_map.elements);\n await Promise.all(\n script_ids.map(script_id =>\n this.#scene._assignClientToScripts({ client_uuid, entity_rtid: this.rtid, script_uuid: script_id }),\n ),\n );\n }\n\n /**\n * Get the live, mutable value of a component.\n * Returns undefined if the component doesn't exist on this entity.\n *\n * The returned object is the actual stored value: it may be mutated in place, but such mutations\n * are not auto-detected. Flag them explicitly with {@link Entity.updateComponent} /\n * {@link Entity.updateComponents}.\n *\n * @example\n * ```typescript\n * const transform = entity.getComponent('local_transform');\n * if (transform) {\n * console.log(transform.position);\n * }\n * ```\n */\n public getComponent<_ComponentName extends ComponentName>(\n component_name: _ComponentName,\n ): ComponentType<_ComponentName> | undefined {\n return this._unsafeGetComponentValue({ component_name });\n }\n\n /**\n * Flag a component as dirty so its current value is sent to the server on the next update.\n *\n * If a `value` is provided, it is applied first (partial update, creating the component if\n * needed; `\"default\"` resets to default values). If `value` is omitted, the component's current\n * stored value is flagged as-is \u2014 the intended pattern is to mutate the object returned by a\n * getter, then call this to flag it.\n *\n * Flagging `local_transform` re-synchronizes its two rotation representations: the\n * representation the caller mutated (`orientation` or `eulerOrientation`) is detected and the\n * other one is recomputed from it. When both were mutated, they are trusted as-is, like on the\n * value-patch path.\n *\n * @example\n * ```typescript\n * // Mutate-then-flag\n * entity.local_transform!.position[1] = 1;\n * entity.updateComponent('local_transform');\n *\n * // Apply a partial update and flag in one call\n * entity.updateComponent('local_transform', { position: [0, 1, 0] });\n *\n * // Reset to defaults\n * entity.updateComponent('mesh_ref', 'default');\n * ```\n */\n public updateComponent<_ComponentName extends ComponentName>(\n component_name: _ComponentName,\n value?: Partial> | DefaultValue,\n ): void {\n if (value === undefined) {\n // Mutate-then-flag: flag the current stored value, if any.\n if (this._unsafeGetComponentValue({ component_name }) === undefined) {\n return;\n }\n if (component_name === \"local_transform\") {\n this.#resyncLocalTransformRotation();\n }\n this._markComponentAsDirty({ component_name, is_new: false });\n return;\n }\n\n let processed_value: Partial> =\n value === \"default\" ? this.#scene._sanitizeComponentValue({ component_name, value: undefined }) : value;\n\n if (component_name === \"local_transform\") {\n processed_value = normalizeLocalTransformPatch(processed_value as LocalTransformPatch) as Partial<\n ComponentType<_ComponentName>\n >;\n }\n\n const existing_component = this._unsafeGetComponentValue({ component_name });\n const isNewComponent = existing_component === undefined;\n\n if (existing_component !== undefined) {\n // Update existing component\n assignComponentPatchInPlace(existing_component, processed_value);\n } else {\n // Create new component\n const sanitized_value = this.#scene._sanitizeComponentValue({\n component_name,\n value: processed_value,\n });\n this._unsafeSetComponentValue({ component_name, value: sanitized_value });\n }\n\n // Mark as dirty and dispatch event\n this._markComponentAsDirty({ component_name, is_new: isNewComponent });\n }\n\n /**\n * Flag several components as dirty at once, using their current stored values.\n *\n * @param component_names - The components to flag.\n *\n * @example\n * ```typescript\n * entity.local_transform!.position[1] = 1;\n * entity.debug_name!.value = \"renamed\";\n * entity.updateComponents([\"local_transform\", \"debug_name\"]);\n *\n * ```\n */\n public updateComponents(component_names: Array): void {\n for (const component_name of component_names) {\n this.updateComponent(component_name);\n }\n }\n\n /**\n * Delete a component from the entity.\n * If the component doesn't exist, this is a no-op.\n *\n * @example\n * ```typescript\n * entity.deleteComponent('mesh_renderer');\n * ```\n */\n public deleteComponent(component_name: ComponentName): void {\n const existing_component = this._unsafeGetComponentValue({ component_name });\n if (existing_component === undefined) {\n return;\n }\n\n this._unsafeSetComponentValue({ component_name, value: undefined });\n if (component_name === \"local_transform\") {\n this.#rotation_shadow = null;\n }\n this._markComponentAsDeleted({ component_name });\n }\n\n /**\n * @internal\n *\n * Re-copy the stored `local_transform` rotation pair into the shadow used by the\n * mutate-then-flag direction detection (see {@link Entity.updateComponent}). Called after every\n * code path that establishes a synchronized quaternion/euler pair. Protected so subclasses\n * writing the stored value directly (the browser entity's constructor and\n * `_setLocalTransform`) can keep the shadow fresh.\n */\n protected _refreshLocalTransformShadow(): void {\n const local_transform = this._unsafeGetComponentValue({ component_name: \"local_transform\" });\n if (local_transform === undefined) {\n this.#rotation_shadow = null;\n return;\n }\n\n this.#rotation_shadow = {\n orientation: [...local_transform.orientation] as Quat,\n eulerOrientation: [...local_transform.eulerOrientation] as Vec3,\n };\n }\n\n /**\n * Re-synchronize the quaternion / euler representations of the stored `local_transform` after\n * caller-side mutations (the mutate-then-flag path). The shadow tells which representation the\n * caller mutated: that one is authoritative and the other is recomputed from it. When both (or\n * neither) changed, the stored values are trusted as-is \u2014 the same policy as the value-patch\n * path (see {@link normalizeLocalTransformPatch}). Recomputed values are written element-wise\n * in place so the array references captured by the browser transform proxies stay live.\n */\n #resyncLocalTransformRotation(): void {\n const local_transform = this._unsafeGetComponentValue({ component_name: \"local_transform\" });\n if (local_transform === undefined) {\n this.#rotation_shadow = null;\n return;\n }\n\n const shadow = this.#rotation_shadow;\n if (shadow !== null) {\n const orientation_changed = !areArraysEqual(local_transform.orientation, shadow.orientation);\n const euler_changed = !areArraysEqual(local_transform.eulerOrientation, shadow.eulerOrientation);\n\n if (orientation_changed && !euler_changed) {\n copyArrayInPlace(local_transform.eulerOrientation, quaternionToEuler(local_transform.orientation));\n } else if (euler_changed && !orientation_changed) {\n copyArrayInPlace(local_transform.orientation, quaternionFromEuler(local_transform.eulerOrientation));\n }\n }\n\n this._refreshLocalTransformShadow();\n }\n\n /**\n * @internal\n */\n protected _setComponentValue<_ComponentName extends ComponentName>({\n component_name,\n value,\n }: {\n component_name: _ComponentName;\n value?: Partial> | DefaultValue;\n }): void {\n if (value === undefined) {\n this.deleteComponent(component_name);\n } else {\n this.updateComponent(component_name, value);\n }\n }\n\n /**\n * @internal\n */\n _set_parent(parent: Entity | null): void {\n this.#parent = parent;\n }\n\n /**\n * @internal\n */\n _applyComponentsUpdate({\n components,\n deleted_components = [],\n dispatch_event,\n emitter,\n }: {\n components: EntityCore | ComponentsManifest | Partial;\n deleted_components?: Array;\n } & (\n | { dispatch_event: false; emitter?: undefined }\n | { dispatch_event: true; emitter: Events.Emitter | null }\n )): void {\n this.#applyComponents({ components, deleted_components });\n\n if (dispatch_event) {\n this._dispatchEvent(\n new EntityUpdatedEvent({\n emitter: this.#scene._resolveEmitter(emitter),\n updated_components: Object.keys(components) as Array,\n deleted_components,\n new_components: [],\n }),\n );\n }\n }\n\n /**\n * Apply component values to the storage core without marking anything dirty or dispatching an\n * event. Private (non-virtual) so it is safe to call from the constructor.\n */\n #applyComponents({\n components,\n deleted_components = [],\n }: {\n components: EntityCore | ComponentsManifest | Partial;\n deleted_components?: Array;\n }): void {\n for (const key in components) {\n const component_name = key as ComponentName | \"euid\";\n\n switch (component_name) {\n case \"euid\":\n break;\n default: {\n // Apply component value without marking as dirty\n const existing = this._unsafeGetComponentValue({ component_name });\n if (existing !== undefined) {\n Object.assign(existing, components[component_name]);\n } else {\n const sanitized = this.#scene._sanitizeComponentValue({\n component_name,\n value: components[component_name],\n });\n this._unsafeSetComponentValue({ component_name, value: sanitized });\n }\n break;\n }\n }\n }\n\n for (const component_name of deleted_components) {\n this.#unsafeDeleteComponent({ component_name });\n }\n\n if (\"local_transform\" in components || deleted_components.includes(\"local_transform\")) {\n this._refreshLocalTransformShadow();\n }\n }\n\n /**\n * @internal\n */\n _markComponentAsDirty({ component_name, is_new }: { component_name: ComponentName; is_new?: boolean }): void {\n if (component_name === \"local_transform\") {\n // Keep the mutate-then-flag shadow fresh after every path that establishes a\n // synchronized rotation pair and flags dirty: the value-patch path and the browser\n // transform-proxy writes.\n this._refreshLocalTransformShadow();\n }\n this.#dirty_components.add(component_name);\n this.#scene._entity_registry._addDirtyEntity({ entity: this });\n if (is_new === undefined) {\n is_new = this._unsafeGetComponentValue({ component_name }) === undefined;\n }\n this._dispatchEvent(\n new EntityUpdatedEvent({\n emitter: null,\n updated_components: !is_new ? [component_name] : [],\n deleted_components: [],\n new_components: is_new ? [component_name] : [],\n }),\n );\n }\n\n /**\n * @internal\n */\n _markComponentAsDeleted({ component_name }: { component_name: ComponentName }): void {\n this.#deleted_components.add(component_name);\n this.#scene._entity_registry._addDirtyEntity({ entity: this });\n this._dispatchEvent(\n new EntityUpdatedEvent({\n emitter: null,\n updated_components: [],\n deleted_components: [component_name],\n new_components: [],\n }),\n );\n }\n\n /**\n * @internal\n */\n _clearDirtyState(): void {\n this.#dirty_components.clear();\n this.#deleted_components.clear();\n }\n\n /**\n * @internal\n */\n _onVisibilityChanged({ is_visible }: { is_visible: boolean }): void {\n this.#is_visible = is_visible;\n this._dispatchEvent(new EntityVisibilityChangedEvent({ is_visible, change_source: \"external\" }));\n }\n\n /**\n * @internal\n */\n _onScriptEventEmitted({\n event_name,\n target_rtids,\n data_object,\n }: {\n event_name: string;\n target_rtids: Array;\n data_object: ScriptDataObject;\n }): void {\n this.#script_event_emitted_event_target._dispatchEvent(\n new ScriptEventEmitted({\n scene: this.#scene,\n event_name,\n emitter_entity: this,\n target_rtids,\n data_object,\n }),\n );\n }\n\n /**\n * @internal\n */\n _onScriptEventReceived({\n script_event_received_event,\n }: {\n script_event_received_event: ScriptEventReceived;\n }): void {\n this.#script_event_received_event_target._dispatchEvent(script_event_received_event);\n }\n\n /**\n *\n */\n #unsafeDeleteComponent<_ComponentName extends ComponentName>({\n component_name,\n }: {\n component_name: _ComponentName;\n }): void {\n this._unsafeSetComponentValue({ component_name, value: undefined });\n }\n}\n\n/**\n * The subset of a `local_transform` patch that carries a rotation, in either representation.\n */\ntype LocalTransformPatch = {\n orientation?: Quat;\n eulerOrientation?: Vec3;\n};\n\n/**\n * Keep the quaternion `orientation` and its `eulerOrientation` counterpart in sync in a\n * `local_transform` patch.\n *\n * When a patch sets only one of the two representations, the other is recomputed so the merged\n * component stays consistent. When it sets both, the caller's values are trusted as-is.\n */\nfunction normalizeLocalTransformPatch(patch: T): T {\n const has_orientation = patch.orientation !== undefined;\n const has_euler = patch.eulerOrientation !== undefined;\n\n if (has_orientation && !has_euler) {\n return { ...patch, eulerOrientation: quaternionToEuler(patch.orientation as Quat) };\n }\n if (has_euler && !has_orientation) {\n return { ...patch, orientation: quaternionFromEuler(patch.eulerOrientation as Vec3) };\n }\n return patch;\n}\n\n/**\n * Merge a component patch into the stored component value, preserving object identity.\n *\n * Unlike `Object.assign`, array values are copied element-wise into the existing arrays instead of\n * replacing them. This is a contract of the explicit component model, not an optimization: a handle\n * obtained from {@link Entity.getComponent} (and any nested array pulled off it) must keep reading\n * and writing the live values across patch merges, or the documented mutate-then-flag pattern would\n * silently operate on stale objects. The browser SDK's transform proxies are one consumer of this\n * contract \u2014 they capture the component's arrays at construction time.\n */\nfunction assignComponentPatchInPlace(existing: object, patch: object): void {\n const target = existing as Record;\n for (const [key, value] of Object.entries(patch)) {\n const current = target[key];\n if (Array.isArray(current) && Array.isArray(value)) {\n current.length = value.length;\n for (let i = 0; i < value.length; i++) {\n current[i] = value[i];\n }\n } else {\n target[key] = value;\n }\n }\n}\n\n/**\n * Exact element-wise equality. Used by the mutate-then-flag rotation shadow: the shadow holds exact\n * copies of the last-synchronized values, so any caller mutation differs exactly \u2014 no epsilon\n * needed.\n */\nfunction areArraysEqual(a: ReadonlyArray, b: ReadonlyArray): boolean {\n return a.length === b.length && a.every((value, index) => value === b[index]);\n}\n\n/**\n * Copy values into an existing array without replacing it, so references captured elsewhere (the\n * browser SDK's transform proxies) keep reading and writing the live values.\n */\nfunction copyArrayInPlace(target: Array, values: ReadonlyArray): void {\n target.length = values.length;\n for (let i = 0; i < values.length; i++) {\n target[i] = values[i];\n }\n}\n", "/**\n *\n */\nconst op_prio = {\n \"!\": 3,\n \"&\": 2,\n \"|\": 1,\n \"^\": 1,\n} as const;\n\n/**\n *\n */\nfunction is_operator(op: string): boolean {\n return Object.prototype.hasOwnProperty.call(op_prio, op);\n}\n\n/**\n *\n */\nfunction has_greater_precedence(op1: keyof typeof op_prio, op2: keyof typeof op_prio): boolean {\n return op_prio[op1] > op_prio[op2];\n}\n\n/**\n * Unary prefix operators are right-associative: \"! ! a\" must parse as !(!(a)),\n * so a second \"!\" should not pop the first one off the stack.\n */\nconst right_associative = new Set([\"!\"]);\n\n/**\n * @internal\n */\nexport function compute_rpn(filter_value: string): string {\n const tokens = filter_value.split(\" \");\n const output: Array = [];\n const operators: Array = [];\n\n for (const token of tokens) {\n switch (token) {\n case \"!\":\n case \"&\":\n case \"|\":\n case \"^\":\n {\n while (operators.length > 0) {\n const op = operators[operators.length - 1] as keyof typeof op_prio;\n if (!is_operator(op) || has_greater_precedence(token, op) || right_associative.has(token) && op_prio[op] === op_prio[token]) {\n break;\n }\n operators.pop();\n output.push(op);\n }\n operators.push(token);\n }\n break;\n case \"(\":\n {\n operators.push(token);\n }\n break;\n case \")\":\n {\n while (operators.length > 0 && operators[operators.length - 1] !== \"(\") {\n output.push(operators.pop()!);\n }\n console.assert(operators[operators.length - 1] === \"(\");\n operators.pop();\n }\n break;\n default:\n {\n output.push(token);\n }\n break;\n }\n }\n\n while (operators.length !== 0) {\n const op = operators.pop()!;\n console.assert(op !== \"(\");\n output.push(op);\n }\n\n return JSON.stringify(output);\n}\n", "//------------------------------------------------------------------------------\nimport type { RTID, UUID, ComponentName, UpdateEntityCommand } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport type { Entity } from \"./Entity\";\n\n/**\n * @internal\n *\n * The EntityRegistry class is responsible for managing the entities in the scene.\n * It keeps track of all entities and provides methods to add, remove, and find entities.\n * It also keeps track of:\n * - dirty entities that have components that have been updated and need to be broadcasted to the editor.\n * - entities that have components that have been detached and need to be removed from the editor.\n * - entities that have updates that need to be broadcasted to the editor.\n *\n * Generic over the concrete entity type `EntityType` so each SDK gets its own entity flavour back.\n */\nexport class EntityRegistry {\n /**\n * A set of all resolved entities that are ready to be used in the client application.\n */\n #entities = new Set();\n\n /**\n * Map from rtid to entity.\n */\n #entity_rtid_lut = new Map();\n\n /**\n * Map from EUID to a list of entities sharing the same EUID.\n */\n #entity_euid_lut = new Map>();\n\n /**\n * List of dirty entities sorted by component type.\n */\n #dirty_entities = new Set();\n\n /**\n * List of dirty entities that need to be broadcasted to the editor sorted by component type.\n */\n #entities_to_persist = new Map<\n EntityType,\n {\n unsaved_components: Set;\n deleted_components: Set;\n }\n >();\n\n /**\n * Adds a new entity in the registry. The entity must be valid, i.e. have valid RTID and EUID and must not have the\n * same RTID as any registered entity.\n *\n * @param entity The entity to add.\n * @throws Error if the entity is invalid or if an entity with the same RTID is already registered.\n */\n add({ entity }: { entity: EntityType }): void {\n const existingEntity = this.#entity_rtid_lut.get(entity.rtid);\n if (existingEntity) {\n throw new Error(\n `Cannot add entity ${entity.name} to the registry, because entity ${existingEntity.name} has the same RTID.`,\n );\n }\n\n this.#entities.add(entity);\n this.#entity_rtid_lut.set(entity.rtid, entity);\n const entities = this.#entity_euid_lut.get(entity.id);\n\n if (entities) {\n entities.push(entity);\n } else {\n this.#entity_euid_lut.set(entity.id, [entity]);\n }\n }\n\n /**\n * Removes an entity from the registry. The entity must have been previously added to the registry.\n *\n * @param entity The entity to remove.\n * @throws Error if the entity is not registered in the registry.\n */\n remove({ entity }: { entity: EntityType }): void {\n const entities = this.#entity_euid_lut.get(entity.id);\n if (!entities) {\n throw new Error(`Trying to remove entity ${entity.id} which has not been registered to the EUID LUT.`);\n }\n\n const index = entities.indexOf(entity);\n if (index == -1) {\n throw new Error(`Trying to remove entity ${entity.id} which has not been registered to the EUID LUT.`);\n }\n\n entities.splice(index, 1);\n\n if (entities.length === 0) {\n this.#entity_euid_lut.delete(entity.id);\n }\n\n this.#removeEntity({ entity });\n }\n\n /**\n * @internal\n *\n * Returns the entity with the given RTID or null if not found.\n *\n * @param entity_rtid The RTID of the entity to get.\n * @returns The entity with the given RTID or null if not found.\n */\n get({ entity_rtid }: { entity_rtid: RTID }): EntityType | null {\n return this.#entity_rtid_lut.get(entity_rtid) ?? null;\n }\n\n /**\n * @internal\n *\n * @returns An iterable of all registered entities.\n */\n all(): Iterable {\n return this.#entity_rtid_lut.values();\n }\n\n /**\n * Returns all entities matching the given EUID or empty array if not found.\n *\n * @param entity_euid The EUID of the entities to get.\n * @returns All entities matching the given EUID or empty array if not found.\n */\n find({ entity_euid }: { entity_euid: UUID }): Array {\n return this.#entity_euid_lut.get(entity_euid) ?? [];\n }\n\n /**\n * @internal\n */\n _removeAll({ entity_euid }: { entity_euid: UUID }): Array {\n const entities = this.#entity_euid_lut.get(entity_euid);\n if (!entities) {\n return [];\n }\n\n this.#entity_euid_lut.delete(entity_euid);\n for (const entity of entities) {\n this.#removeEntity({ entity });\n }\n\n return entities;\n }\n\n /**\n * @internal\n */\n _addDirtyEntity({ entity }: { entity: EntityType }): void {\n this.#dirty_entities.add(entity);\n }\n\n /**\n * @internal\n */\n _removeEntityFromBroadcastList({ entity }: { entity: EntityType }): void {\n this.#entities_to_persist.delete(entity);\n }\n\n /**\n * @internal\n */\n _flushDirtyEntities(): Array {\n const update_command = new Array(this.#dirty_entities.size);\n\n let i = 0;\n for (const entity of this.#dirty_entities) {\n update_command[i++] = {\n entity_components: entity._core,\n dirty_components: entity._dirty_components,\n deleted_components: entity._deleted_components,\n };\n\n if (entity.auto_broadcast) {\n this.#updateBroadcastList({ entity });\n }\n\n entity._clearDirtyState();\n }\n\n this.#dirty_entities.clear();\n\n return update_command;\n }\n\n /**\n * @internal\n */\n _flushPersistentEntities(): Array {\n const update_command = new Array(this.#entities_to_persist.size);\n\n let i = 0;\n for (const [entity, { unsaved_components, deleted_components }] of this.#entities_to_persist) {\n update_command[i++] = {\n entity_components: entity._core,\n dirty_components: Array.from(unsaved_components),\n deleted_components: Array.from(deleted_components),\n };\n }\n\n this.#entities_to_persist.clear();\n\n return update_command;\n }\n\n /**\n *\n */\n #removeEntity({ entity }: { entity: EntityType }): void {\n if (!this.#entity_rtid_lut.delete(entity.rtid)) {\n throw new Error(`Trying to remove entity ${entity.rtid} which has not been registred to the RTID LUT.`);\n }\n\n if (!this.#entities.delete(entity)) {\n throw new Error(`Trying to remove entity ${entity.id} which has not been registered to the registry.`);\n }\n\n this.#dirty_entities.delete(entity);\n this.#entities_to_persist.delete(entity);\n }\n\n /**\n * @internal\n */\n #updateBroadcastList({ entity }: { entity: EntityType }): void {\n const broadcast_data = this.#entities_to_persist.get(entity);\n if (!broadcast_data) {\n this.#entities_to_persist.set(entity, {\n unsaved_components: new Set(entity._dirty_components),\n deleted_components: new Set(entity._deleted_components),\n });\n } else {\n for (const component_name of entity._dirty_components) {\n broadcast_data.unsaved_components.add(component_name);\n broadcast_data.deleted_components.delete(component_name);\n }\n for (const component_name of entity._deleted_components) {\n broadcast_data.deleted_components.add(component_name);\n broadcast_data.unsaved_components.delete(component_name);\n }\n }\n }\n}\n", "import { EditionEvent } from \"../EditionEvent\";\nimport type { Client } from \"../session/Client\";\nimport type { Entity } from \"./Entity\";\nimport type { RTID, SceneSettingsManifest } from \"@3dverse/livelink.core\";\n\n/**\n * Event that is fired when one or more entities are created.\n *\n * Dispatched by {@link Scene} as `on-entities-created`.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class EntitiesCreatedEvent extends EditionEvent {\n /**\n * The entities that were created.\n */\n public readonly entities: Array;\n\n /**\n * @internal\n */\n constructor({ entities, emitter }: { entities: Array; emitter: Client | null }) {\n super(\"on-entities-created\", emitter);\n this.entities = entities;\n }\n}\n\n/**\n * Event that is fired when one or more entities are deleted.\n *\n * Dispatched by {@link Scene} as `on-entities-deleted`.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class EntitiesDeletedEvent extends EditionEvent {\n /**\n * @internal\n */\n public readonly entity_ids: Array;\n\n /**\n * Checks if the event includes the given entity.\n */\n includes(entity: Entity): boolean {\n return this.entity_ids.includes(entity.rtid);\n }\n\n /**\n * @internal\n */\n constructor({ entity_ids, emitter }: { entity_ids: Array; emitter: Client | null }) {\n super(\"on-entities-deleted\", emitter);\n this.entity_ids = entity_ids;\n }\n}\n\n/**\n * Event that is fired when the scene settings are updated.\n *\n * Dispatched by {@link Scene} as `on-scene-settings-updated`.\n *\n * @event\n * @noInheritDoc\n * @category Scene / Events\n */\nexport class SceneSettingsUpdatedEvent extends EditionEvent {\n /**\n * The updated scene settings that has been applied.\n * Contains only the settings that were changed.\n */\n public readonly updated_settings: SceneSettingsManifest;\n\n /**\n * @internal\n */\n constructor({ updated_settings, emitter }: { updated_settings: SceneSettingsManifest; emitter: Client | null }) {\n super(\"on-scene-settings-updated\", emitter);\n this.updated_settings = updated_settings;\n }\n}\n\n/**\n * The events dispatched by {@link Scene}.\n *\n * @event\n * @category Scene / Events\n */\nexport type SceneEvents = {\n \"on-entities-created\": EntitiesCreatedEvent;\n \"on-entities-deleted\": EntitiesDeletedEvent;\n \"on-scene-settings-updated\": SceneSettingsUpdatedEvent;\n};\n", "/**\n * Creates a Promise along with its resolve and reject functions.\n *\n * @internal\n */\nexport class PromiseWithResolver {\n readonly promise: Promise;\n #resolve!: (value: T) => void;\n #reject!: (reason?: unknown) => void;\n\n /**\n *\n */\n constructor() {\n this.promise = new Promise((resolve, reject) => {\n this.#resolve = resolve;\n this.#reject = reject;\n });\n }\n\n /**\n *\n */\n get resolve(): (value: T) => void {\n return this.#resolve;\n }\n\n /**\n *\n */\n get reject(): (reason?: unknown) => void {\n return this.#reject;\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { Events, SceneSettingsManifest, SceneSettingsRecord } from \"@3dverse/livelink.core\";\n//------------------------------------------------------------------------------\n\nimport type { SceneBase } from \"./Scene\";\nimport { PromiseWithResolver } from \"./PromiseWithResolver\";\nimport { SceneSettingsUpdatedEvent } from \"./SceneEvents\";\n\n/**\n * @internal\n *\n * The SceneHost type is a subset of the SceneBase class that is used by the SceneSettings class to interact with the scene.\n * It exposes only the methods that are needed by the SceneSettings class, and hides the rest of the SceneBase API.\n * This allows for better encapsulation and separation of concerns between the SceneSettings and SceneBase classes.\n * It also allows for easier testing and mocking of the SceneBase class in unit tests for the SceneSettings class.\n */\ntype SceneHost = Pick;\n\n/**\n * @internal\n *\n * The SceneSettings class is responsible for managing the settings of the scene.\n * It wraps the scene settings with proxies to trigger updates when the values are changed.\n * It also listens to updates from the editor and updates the local settings values accordingly.\n */\nexport class SceneSettings {\n /**\n *\n */\n #scene: SceneHost;\n\n /**\n * The settings for the scene without proxies.\n */\n #raw_settings: SceneSettingsRecord | null = null;\n\n /**\n * The settings for the scene with proxies.\n */\n #proxied_settings: SceneSettingsRecord | null = null;\n\n /**\n * Dirty settings that need to be updated to the renderer.\n */\n #dirty_settings_to_update: SceneSettingsManifest = {};\n\n /**\n * Dirty settings that need to be broadcasted to other clients.\n */\n #dirty_settings_to_broadcast: SceneSettingsManifest = {};\n\n /**\n * Promise that resolves when the settings are loaded.\n */\n #initialization_promise = new PromiseWithResolver();\n\n /**\n * @internal\n */\n constructor(scene: SceneHost) {\n this.#scene = scene;\n }\n\n /**\n *\n */\n get values(): Promise> {\n return this.#initialization_promise.promise;\n }\n\n /**\n * @internal\n */\n _onSceneSettingsUpdated = ({ updated_settings, emitter }: Events.SceneSettingsUpdatedEvent): void => {\n if (!this.#raw_settings) {\n this.#initializeSceneSettingsProxy(updated_settings as SceneSettingsRecord);\n return;\n }\n\n console.debug(\"\u26A1 Scene settings updated:\", updated_settings);\n\n for (const [settingSectionName, settingSection] of Object.entries(updated_settings)) {\n for (const [key, value] of Object.entries(settingSection)) {\n Reflect.set(this.#raw_settings[settingSectionName as keyof SceneSettingsRecord], key, value);\n }\n }\n\n this.#scene._dispatchEvent(\n new SceneSettingsUpdatedEvent({ updated_settings, emitter: this.#scene._resolveEmitter(emitter) }),\n );\n };\n\n /**\n * @internal\n */\n #initializeSceneSettingsProxy = (initial_settings: SceneSettingsRecord): void => {\n this.#raw_settings = initial_settings;\n this.#proxied_settings = {} as SceneSettingsRecord;\n\n for (const [settingSectionName, settingSection] of Object.entries(this.#raw_settings)) {\n const settingProxy = {} as typeof settingSection;\n\n const onSettingAttributeChanged = (attributeName: keyof SceneSettingsRecord, value: unknown): void => {\n console.debug(`\u2699\uFE0F Scene setting changed: ${settingSectionName}.${String(attributeName)} =`, value);\n const updated_settings = { [settingSectionName]: { [attributeName]: value } } as SceneSettingsManifest;\n\n this.#addToDirtySettingsToUpdate(updated_settings);\n this.#addToDirtySettingsToBroadcast(updated_settings);\n this.#scene._dispatchEvent(new SceneSettingsUpdatedEvent({ updated_settings, emitter: null }));\n };\n\n for (const [attributeName, attributeValue] of Object.entries(settingSection)) {\n const typedAttributeName = attributeName as keyof typeof settingSection;\n if (typeof attributeValue !== \"object\" && !Array.isArray(attributeValue)) {\n continue;\n }\n\n settingProxy[typedAttributeName] = new Proxy(settingSection[typedAttributeName], {\n get: (_, prop): unknown => Reflect.get(settingSection[typedAttributeName], prop),\n set: (_, prop, v: unknown): boolean => {\n const result = Reflect.set(settingSection[typedAttributeName], prop, v);\n const value = settingSection[typedAttributeName];\n onSettingAttributeChanged(typedAttributeName, value);\n return result;\n },\n });\n }\n\n //@ts-expect-error Cannot infer the type here\n this.#proxied_settings[settingSectionName as keyof SceneSettingsRecord] = new Proxy(settingProxy, {\n get: (_, prop): unknown => {\n if (Object.prototype.hasOwnProperty.call(settingProxy, prop)) {\n return Reflect.get(settingProxy, prop);\n }\n return Reflect.get(this.#raw_settings![settingSectionName as keyof SceneSettingsRecord], prop);\n },\n set: (_, prop: keyof SceneSettingsRecord, value: unknown): boolean => {\n onSettingAttributeChanged(prop, value);\n return Reflect.set(\n this.#raw_settings![settingSectionName as keyof SceneSettingsRecord],\n prop,\n value,\n );\n },\n });\n }\n\n this.#initialization_promise.resolve(this.#proxied_settings);\n };\n\n /**\n *\n */\n _getAndClearSettingsToUpdate = (): SceneSettingsManifest => {\n const settings = this.#dirty_settings_to_update;\n this.#dirty_settings_to_update = {};\n return settings;\n };\n\n /**\n *\n */\n _getAndClearSettingsToBroadcast = (): SceneSettingsManifest => {\n const settings = this.#dirty_settings_to_broadcast;\n this.#dirty_settings_to_broadcast = {};\n return settings;\n };\n\n /**\n *\n */\n #addToDirtySettingsToUpdate = (updated_settings: SceneSettingsManifest): void => {\n for (const [section, settings] of Object.entries(updated_settings)) {\n const typedSection = section as keyof SceneSettingsManifest;\n if (!this.#dirty_settings_to_update[typedSection]) {\n this.#dirty_settings_to_update[typedSection] = {};\n }\n\n Object.assign(this.#dirty_settings_to_update[typedSection], settings);\n }\n };\n\n /**\n *\n */\n #addToDirtySettingsToBroadcast = (updated_settings: SceneSettingsManifest): void => {\n for (const [section, settings] of Object.entries(updated_settings)) {\n const typedSection = section as keyof SceneSettingsManifest;\n if (!this.#dirty_settings_to_broadcast[typedSection]) {\n this.#dirty_settings_to_broadcast[typedSection] = {};\n }\n\n Object.assign(this.#dirty_settings_to_broadcast[typedSection], settings);\n }\n };\n}\n", "//------------------------------------------------------------------------------\nimport type {\n LivelinkCore,\n RTID,\n UUID,\n ScriptDataObject,\n Components,\n ComponentName,\n EntityCore,\n EntityResponse,\n ComponentType,\n ComponentsManifest,\n ComponentsRecord,\n Events,\n SceneSettingsRecord,\n} from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport type { LivelinkInstance } from \"../LivelinkInstance\";\nimport { Entity } from \"./Entity\";\nimport { compute_rpn } from \"./Filters\";\nimport { EntityRegistry } from \"./EntityRegistry\";\nimport { ScriptEventReceived } from \"./ScriptEvents\";\nimport { EntitiesCreatedEvent, EntitiesDeletedEvent, SceneEvents } from \"./SceneEvents\";\nimport { TypedEventTarget } from \"../TypedEventTarget\";\nimport type { Client } from \"../session/Client\";\nimport { PromiseWithResolver } from \"./PromiseWithResolver\";\nimport { SceneSettings } from \"./SceneSettings\";\n\n/**\n * Options for creating a new entity.\n *\n * @inline\n * @category Scene\n */\nexport type EntityCreationOptions = {\n /**\n * Whether to delete the entity when the client disconnects.\n */\n delete_on_client_disconnection?: boolean;\n\n /**\n * @deprecated\n * Whether to broadcast the entity automatically.\n */\n auto_broadcast?: boolean;\n};\n\n/**\n * Information about the scene.\n *\n * @category Scene\n */\nexport type SceneInfo = Omit & {\n root_entities: Array;\n};\n\n/**\n * @internal\n * The scene operations an {@link Entity} needs from its owning scene.\n */\nexport interface SceneEntityInterface {\n /** @internal */\n _resolveEmitter(emitter: Events.Emitter | null): Client | null;\n\n /** @internal */\n readonly _entity_registry: EntityRegistry;\n\n /** @internal */\n _sanitizeComponentValue<_ComponentName extends ComponentName>(params: {\n component_name: _ComponentName;\n value: Partial> | undefined;\n }): ComponentType<_ComponentName>;\n\n /** @internal */\n _setEntityVisibility(params: { entity_rtid: RTID; is_visible: boolean }): Promise;\n\n /** @internal */\n _getChildren(params: { entity: EntityType }): Promise>;\n\n /** @internal */\n _assignClientToScripts(params: { client_uuid: UUID; entity_rtid: RTID; script_uuid: UUID }): void;\n\n /** @internal */\n _onEntityReparented(): void;\n\n /**\n * @internal\n * Not called by `Entity` itself \u2014 forwarded to {@link ScriptEventEmitted} (see\n * {@link Entity._onScriptEventEmitted}), which uses it to resolve `target_entities`.\n */\n _findEntity(params: { entity_rtid: RTID }): Promise;\n}\n\n/**\n * @internal\n * The scene operations {@link ScriptEventEmitted} needs from its owning scene.\n */\nexport interface SceneScriptEventInterface {\n /** @internal */\n _findEntity(params: { entity_rtid: RTID }): Promise;\n}\n\n/**\n * The scene class.\n *\n * It is the main entry point to interact with the entities in the scene.\n * It is responsible for creating, finding, and deleting entities.\n *\n * It is generic over the concrete entity type `EntityType` so each SDK gets its own entity flavour back from\n * every scene method. The actual entity instantiation is delegated to the abstract\n * `_instantiateEntity` factory implemented by each concrete `Scene`.\n *\n * This class is not meant to be instantiated directly.\n * Instead, it is created by the livelink instance and can be accessed through the `scene` property.\n *\n * @category Scene\n */\nexport abstract class SceneBase\n extends TypedEventTarget>\n implements SceneEntityInterface, SceneScriptEventInterface\n{\n /**\n * @internal\n * Registry of entities discovered until now.\n */\n public readonly _entity_registry = new EntityRegistry();\n\n /**\n * @internal\n * The scene settings.\n */\n public readonly _settings: SceneSettings = new SceneSettings(this);\n\n /**\n * The livelink instance.\n */\n readonly #instance: LivelinkInstance;\n\n /**\n * The core instance.\n */\n #core: LivelinkCore;\n\n /**\n * The pending entity requests.\n * Used to avoid duplicate requests for the same entity.\n */\n #pending_entity_requests = new Map>>();\n\n /**\n * Promise that resolves when the scene graph has finished loading.\n */\n #scene_info_promise = new PromiseWithResolver>();\n\n /**\n * Whether the server has finished loading every pending referenced scene, as reported by the\n * last asset loading status received.\n */\n #is_scene_loaded: boolean = false;\n\n /**\n * Resolves once the server reports it has finished loading every pending referenced scene.\n * Replaced with a fresh pending promise whenever the server starts loading scenes again.\n */\n #scene_loaded_promise = new PromiseWithResolver();\n\n /**\n * Resolves when the livelink instance is disconnected, so that a pending\n * {@link waitForSceneLoaded} can resolve immediately.\n */\n #disconnected_promise = new PromiseWithResolver();\n\n /**\n * @internal\n */\n constructor(instance: LivelinkInstance, core: LivelinkCore) {\n super();\n this.#instance = instance;\n this.#core = core;\n }\n\n /**\n * @internal\n *\n * Instantiate the concrete entity type for this scene. Implemented by each SDK's `Scene` so that\n * the shared scene logic produces the right entity flavour (browser proxied entity vs. headless\n * entity) while staying entity-type agnostic.\n */\n protected abstract _instantiateEntity(params: {\n parent: EntityType | null;\n components: EntityCore;\n options?: EntityCreationOptions;\n is_visible?: boolean;\n children_rtid?: Array;\n }): EntityType;\n\n /**\n * Create a new entity.\n *\n * @param params\n * @param params.name - The name of the entity.\n * @param params.components - The components to add to the entity with their initial values.\n * If no initial values are provided, the default values are used.\n * @param params.options - Additional options for the entity creation.\n *\n * @returns A promise that resolves to the created entity.\n *\n * @example\n * ```typescript\n * const entity = await scene.newEntity({\n * name: \"My Entity\",\n * components: {\n * local_transform: {\n * position: [0, 2, 0],\n * // default values are used for scale and orientation\n * }\n * },\n * });\n * ```\n */\n async newEntity({\n name,\n components,\n options,\n parent = null,\n }: {\n name: string;\n components: ComponentsManifest;\n options?: EntityCreationOptions;\n parent?: EntityType | null;\n }): Promise {\n const lineage: Partial | undefined = parent ? { parentUUID: parent.id } : undefined;\n const entity_cores = await this.#core.createEntities({\n components: [{ debug_name: { value: name }, ...components, lineage }],\n delete_on_client_disconnection: options?.delete_on_client_disconnection ?? false,\n is_transient: true,\n });\n const entity = this._instantiateEntity({ parent, components: entity_cores[0], options });\n this._dispatchEvent(new EntitiesCreatedEvent({ entities: [entity], emitter: null }));\n return entity;\n }\n\n /**\n * Create multiple entities at once.\n * This method is more efficient than calling `newEntity` multiple times.\n * It creates all entities in a single call to the core.\n *\n * @param params\n * @param params.components_array - An array of objects with the name and components of each entity.\n * @param params.options - Additional options for the entity creation.\n *\n * @returns A promise that resolves to an array of the created entities.\n */\n async newEntities({\n components_array,\n options,\n }: {\n components_array: Array;\n options?: EntityCreationOptions;\n }): Promise> {\n const entity_cores = await this.#core.createEntities({\n components: components_array,\n delete_on_client_disconnection: options?.delete_on_client_disconnection ?? false,\n is_transient: true,\n });\n\n //TODO: compute each entity's parent\n const entities = entity_cores.map(components => this._instantiateEntity({ parent: null, components, options }));\n this._dispatchEvent(new EntitiesCreatedEvent({ entities, emitter: null }));\n return entities;\n }\n\n /**\n * Find an entity by its UUID and linkage.\n *\n * @param params\n * @param params.entity_uuid - The UUID of the entity to find.\n * @param params.linkage - The linkage of the entity to find.\n *\n * @returns A promise that resolves to the found entity or null if not found.\n */\n async findEntity({\n entity_uuid,\n linkage = [],\n }: {\n entity_uuid: UUID;\n linkage?: Array;\n }): Promise {\n const foundEntity = this._entity_registry\n .find({ entity_euid: entity_uuid })\n .find(\n entity =>\n (entity.lineage?.value?.length ?? 0) === linkage.length &&\n (entity.lineage?.value ?? []).every((uuid, i) => uuid === linkage[i]),\n );\n\n if (foundEntity) {\n return foundEntity;\n }\n\n const entity_reponses = await this.#core.findEntities({\n query: { euid: entity_uuid, linkage },\n options: { include_ancestors: true },\n });\n\n if (entity_reponses.length === 0) {\n return null;\n }\n\n return this.#resolveEntityResponse(entity_reponses[0]);\n }\n\n /**\n * Find entities by their UUID.\n *\n * This can return multiple entities if the entity is a child of a {@link Components.SceneRef}\n * that is instanced multiple times.\n *\n * @param params\n * @param params.entity_uuid - The UUID of the entity to find.\n *\n * @returns A promise that resolves to an array of entities with the given UUID.\n */\n async findEntities({ entity_uuid }: { entity_uuid: UUID }): Promise> {\n const foundEntities = this._entity_registry.find({ entity_euid: entity_uuid });\n if (foundEntities.length > 0) {\n return foundEntities;\n }\n\n const entity_responses = await this.#core.findEntities({\n query: { euid: entity_uuid },\n options: { include_ancestors: true },\n });\n return this.#resolveEntityResponses({ entity_responses });\n }\n\n /**\n * Delete a batch of entities.\n *\n * @param params\n * @param params.entities - The entities to delete.\n *\n * @returns A promise that resolves when the entities are deleted.\n */\n async deleteEntities({ entities }: { entities: Array }): Promise {\n await this.#core.deleteEntities({ entity_uuids: entities.map(e => e.id) });\n\n for (const entity of entities) {\n this._entity_registry.remove({ entity });\n }\n }\n\n /**\n * Highlight a batch of entities.\n *\n * @param params\n * @param params.entities - The entities to highlight.\n * @param params.keep_old_selection - Whether to keep the old selection or not.\n *\n * @returns A promise that resolves when the message is sent.\n */\n async highlightEntities({\n entities,\n keep_old_selection = false,\n }: {\n entities: Array;\n keep_old_selection?: boolean;\n }): Promise {\n this.#core.highlightEntities({\n highlightEntitiesMessage: {\n entities: entities.map(e => e.rtid),\n keep_old_selection,\n },\n });\n }\n\n /**\n * Fire a script event.\n *\n * @param params\n * @param params.event_map_id - The UUID of the event map.\n * @param params.event_name - The name of the event.\n * @param params.emitter_entity - The entity that emits the event.\n * @param params.target_entities - The entities that are the target of the event. Leave empty for global events.\n * @param params.data_object - The data object to pass with the event.\n *\n * @returns A promise that resolves when the message is sent.\n *\n * @experimental\n */\n fireEvent({\n event_map_id,\n event_name,\n emitter_entity,\n target_entities = [],\n data_object = {},\n }: {\n event_map_id: UUID;\n event_name: string;\n emitter_entity?: EntityType;\n target_entities?: Array;\n data_object?: ScriptDataObject;\n }): void {\n this.#core.fireEvent({\n event_map_id,\n event_name,\n emitter_entity: emitter_entity ? emitter_entity.rtid : 0n,\n target_entities: target_entities.map(e => e.rtid),\n data_object,\n });\n }\n\n /**\n * @experimental\n */\n setFilter({ name, value }: { name: string; value: string }): void {\n const rpn = compute_rpn(value);\n this.#core.setFilter({ name, rpn });\n }\n\n /**\n * @experimental\n */\n toggleFilter({ name, enabled }: { name: string; enabled: boolean }): void {\n this.#core.toggleFilter({ name, enabled });\n }\n\n /**\n * @experimental\n */\n removeFilter({ name }: { name: string }): void {\n this.#core.removeFilter({ name });\n }\n\n /**\n * @deprecated\n */\n async findEntitiesByNames({ entity_names }: { entity_names: Array }): Promise> {\n const entity_responses = await this.#core.findEntities({\n query: { names: entity_names },\n options: { include_ancestors: true },\n });\n return this.#resolveEntityResponses({ entity_responses });\n }\n\n /**\n * @deprecated\n */\n async findEntitiesWithComponents({\n mandatory_components,\n forbidden_components,\n }: {\n mandatory_components: Array;\n forbidden_components?: Array;\n }): Promise> {\n const entity_responses = await this.#core.findEntities({\n query: { mandatory_components, forbidden_components },\n options: { include_ancestors: true },\n });\n return this.#resolveEntityResponses({ entity_responses });\n }\n\n /**\n * @internal\n *\n * Get an entity by its RTID.\n */\n async _findEntity({ entity_rtid }: { entity_rtid: RTID }): Promise {\n if (entity_rtid === 0n) {\n return null;\n }\n\n const entity = this._entity_registry.get({ entity_rtid });\n if (entity) {\n return entity;\n }\n\n let promise = this.#pending_entity_requests.get(entity_rtid);\n if (!promise) {\n promise = this.#core.findEntities({ query: { rtid: entity_rtid } });\n this.#pending_entity_requests.set(entity_rtid, promise);\n }\n\n const entity_responses = await promise;\n this.#pending_entity_requests.delete(entity_rtid);\n if (entity_responses.length === 0) {\n return null;\n }\n\n return this.#resolveEntityResponse(entity_responses[0]);\n }\n\n /**\n * @internal\n */\n async _getChildren({ entity }: { entity: EntityType }): Promise> {\n const children_components = await this.#core.getChildren({ entity_rtid: entity.rtid });\n return children_components.map(\n components =>\n this._entity_registry.get({ entity_rtid: components.euid.rtid }) ??\n this._instantiateEntity({ parent: entity, components }),\n );\n }\n\n /**\n * @internal\n */\n _assignClientToScripts({\n client_uuid,\n entity_rtid,\n script_uuid,\n }: {\n client_uuid: UUID;\n entity_rtid: RTID;\n script_uuid: UUID;\n }): void {\n this.#core.assignClientToScript({ client_uuid, script_uuid, entity_rtid });\n }\n\n /**\n * @internal\n */\n async _setEntityVisibility({ entity_rtid, is_visible }: { entity_rtid: RTID; is_visible: boolean }): Promise {\n return this.#core.setEntityVisibility({ entity_rtid, is_visible });\n }\n\n /**\n * @internal\n */\n _onEntityVisibilityChanged = ({ entity_rtid, is_visible }: Events.EntityVisibilityChangedEvent): void => {\n const entity = this._entity_registry.get({ entity_rtid });\n if (entity) {\n entity._onVisibilityChanged({ is_visible });\n\n for (const child_rtid of entity.children_rtid) {\n this._setEntityVisibility({ entity_rtid: child_rtid, is_visible });\n }\n }\n };\n\n /**\n * @internal\n */\n _onEntitiesCreated = async ({ created_entities, emitter }: Events.EntitiesCreatedEvent): Promise => {\n const entities: Array = [];\n\n for (const [parent_rtid, children] of created_entities.entries()) {\n const parent: EntityType | null =\n parent_rtid !== 0n ? await this._findEntity({ entity_rtid: parent_rtid }) : null;\n\n for (const entity of children) {\n entities.push(this._instantiateEntity({ parent, components: entity }));\n }\n }\n\n this._dispatchEvent(new EntitiesCreatedEvent({ entities, emitter: this._resolveEmitter(emitter) }));\n };\n\n /**\n * @internal\n */\n _onEntitiesDeleted = ({\n deleted_entity_euids,\n deleted_entity_rtids,\n emitter,\n }: Events.EntitiesDeletedEvent): void => {\n const entity_ids = Array();\n for (const entity_euid of deleted_entity_euids) {\n const entities = this._entity_registry._removeAll({ entity_euid });\n for (const entity of entities) {\n entity_ids.push(entity.rtid);\n }\n }\n\n for (const entity_rtid of deleted_entity_rtids) {\n const entity = this._entity_registry.get({ entity_rtid });\n if (entity) {\n entity_ids.push(entity.rtid);\n this._entity_registry.remove({ entity });\n }\n }\n\n this._dispatchEvent(new EntitiesDeletedEvent({ entity_ids, emitter: this._resolveEmitter(emitter) }));\n };\n\n /**\n * @internal\n */\n _updateEntityFromEvent({\n entity_euid,\n updated_components,\n deleted_components,\n emitter,\n }: {\n entity_euid: UUID;\n updated_components: Partial;\n deleted_components?: Array;\n emitter: Events.Emitter | null;\n }): void {\n const entities = this._entity_registry.find({ entity_euid });\n\n if (entities.length === 0) {\n console.log(\"Received an update for an undiscovered entity\", entity_euid);\n return;\n }\n\n for (const entity of entities) {\n if (updated_components.lineage) {\n this.#onEntityReparentedByEuid({\n entity,\n new_parent_euid: updated_components.lineage.parentUUID ?? null,\n });\n }\n\n entity._applyComponentsUpdate({\n components: updated_components,\n deleted_components,\n dispatch_event: true,\n emitter,\n });\n }\n }\n\n /**\n * @internal\n */\n _onEntityReparented = (): void => {\n this.#instance._updateEntities();\n };\n\n /**\n *\n */\n #onEntityReparentedByEuid = async ({\n entity,\n new_parent_euid,\n }: {\n entity: EntityType;\n new_parent_euid: UUID | null;\n }): Promise => {\n if (!new_parent_euid) {\n entity._set_parent(null);\n return;\n }\n\n const parent_entities = await this.findEntities({ entity_uuid: new_parent_euid });\n const entityLineage = entity.lineage;\n if (!entityLineage) {\n entity._set_parent(parent_entities[0] ?? null);\n return;\n }\n\n const parentEntity = parent_entities.find(parent => {\n if (!parent.lineage) {\n return false;\n }\n return parent.lineage.value.every((linkerEUID, i) => linkerEUID === entityLineage.value[i]);\n });\n\n entity._set_parent(parentEntity ?? null);\n };\n\n /**\n * @internal\n */\n _onScriptEventReceived = ({\n emitter_rtid,\n event_name,\n target_rtids,\n data_object,\n }: Events.ScriptEventTriggeredEvent): void => {\n const emitter_entity = this._entity_registry.get({ entity_rtid: emitter_rtid });\n if (emitter_entity) {\n emitter_entity._onScriptEventEmitted({ event_name, target_rtids, data_object });\n }\n\n const script_event_received_event = new ScriptEventReceived({ event_name, emitter_entity, data_object });\n\n // If no target RTIDs are specified, broadcast to all entities\n if (target_rtids.length === 0) {\n for (const entity of this._entity_registry.all()) {\n entity._onScriptEventReceived({ script_event_received_event });\n }\n } else {\n for (const entity_rtid of target_rtids) {\n const target_entity = this._entity_registry.get({ entity_rtid });\n if (target_entity) {\n target_entity._onScriptEventReceived({ script_event_received_event });\n }\n }\n }\n };\n\n /**\n * @internal\n */\n _sanitizeComponentValue<_ComponentName extends ComponentName>({\n component_name,\n value,\n }: {\n component_name: _ComponentName;\n value: Partial> | undefined;\n }): ComponentType<_ComponentName> {\n return this.#core.sanitizeComponentValue({ component_name, value });\n }\n\n /**\n *\n */\n #resolveEntityResponses({ entity_responses }: { entity_responses: Array }): Array {\n return entity_responses.map(this.#resolveEntityResponse);\n }\n\n /**\n *\n */\n #resolveEntityResponse = (entity_response: EntityResponse): EntityType => {\n const entity = this._entity_registry.get({ entity_rtid: entity_response.components.euid.rtid });\n if (entity) {\n return entity;\n }\n\n const parent: EntityType | null = entity_response.ancestors\n ? this.#resolveEntityAncestors(entity_response.ancestors)\n : null;\n\n return this._instantiateEntity({\n parent,\n components: entity_response.components,\n is_visible: entity_response.is_visible,\n children_rtid: entity_response.children_rtid,\n });\n };\n\n /**\n *\n */\n #resolveEntityAncestors = (ancestors: EntityResponse[]): EntityType | null => {\n let current_parent: EntityType | null = null;\n\n for (const ancestor of ancestors) {\n const entity = this._entity_registry.get({ entity_rtid: ancestor.components.euid.rtid });\n if (entity) {\n current_parent = entity;\n } else {\n current_parent = this._instantiateEntity({\n parent: current_parent,\n components: ancestor.components,\n is_visible: ancestor.is_visible,\n children_rtid: ancestor.children_rtid,\n });\n }\n }\n\n return current_parent;\n };\n\n /**\n * @internal\n */\n _resolveEmitter(emitter: Events.Emitter | null): Client | null {\n if (emitter === null) {\n return null;\n }\n\n const session = this.#instance.session;\n\n if (emitter.session_id !== this.#instance.session.session_id) {\n return session._instantiateClient({\n core: this.#instance,\n client_info: emitter,\n session_id: emitter.session_id,\n });\n }\n\n return session.getClient(emitter);\n }\n\n /**\n * Get the current scene settings.\n * These values can be updated in real-time by other clients.\n * Altering these values locally will update the scene settings on the server\n * and broadcast the changes to other connected clients.\n *\n * @returns The current scene settings.\n */\n async getSettings(): Promise> {\n return this._settings.values;\n }\n\n /**\n * Get scene information such as the entity count, triangle count,\n * and scene bounding box.\n *\n * @returns The scene info.\n */\n async getInfo(): Promise> {\n return this.#scene_info_promise.promise;\n }\n\n /**\n * Wait until the server reports it has finished loading every pending scene, so that the\n * entities of the scenes referenced through `scene_ref` components are addressable. Resolves\n * immediately if the server already reported so.\n *\n * A scene referencing others is streamed in progressively: until the server is done, entities\n * living in those referenced scenes are not available yet. It starts loading again \u2014 and this\n * starts waiting again \u2014 whenever a new scene is referenced.\n *\n * **This has no timeout, so it may never resolve.** It waits on the server, and the server does\n * not always report: a scene whose reference the session's token cannot read never finishes\n * loading, and nothing marks that as an error. Disconnecting is then the only thing that ends\n * the wait, resolving it `false`. Never rejects \u2014 a caller that cannot afford to be parked\n * indefinitely should race it against a deadline of its own.\n *\n * @returns `true` once the server reports the scenes loaded, `false` if the session was\n * disconnected before it did.\n */\n async waitForSceneLoaded(): Promise {\n if (this.#is_scene_loaded) {\n return true;\n }\n\n return await Promise.race([\n this.#scene_loaded_promise.promise.then(() => true),\n this.#disconnected_promise.promise.then(() => false),\n ]);\n }\n\n /**\n * @internal\n * Track whether the server is done loading scenes, applying the same test the core applies to\n * decide a scene is loaded. `loading_payloads` is deliberately not part of it: payloads are mesh\n * and texture data, whose streaming says nothing about whether an entity exists yet.\n */\n _onAssetLoadingStatusReceived = ({ pending_scenes, pending_requests }: Events.AssetLoadingStatusEvent): void => {\n const loaded = pending_scenes === 0 && pending_requests === 0;\n\n if (loaded) {\n if (!this.#is_scene_loaded) {\n this.#is_scene_loaded = true;\n this.#scene_loaded_promise.resolve();\n }\n } else if (this.#is_scene_loaded) {\n // Loading started again after having completed: the current promise is settled, so arm a\n // fresh one for the new batch. Only done on that transition \u2014 swapping a still-pending\n // promise would orphan whoever is already awaiting it.\n this.#is_scene_loaded = false;\n this.#scene_loaded_promise = new PromiseWithResolver();\n }\n };\n\n /**\n * @internal\n * Release whoever is waiting on the scene to load.\n */\n _onDisconnected = (): void => {\n this.#disconnected_promise.resolve();\n };\n\n /**\n * @internal\n */\n _onSceneInfoLoaded = (event: Events.SceneInfoLoadedEvent): void => {\n const root_entities = this.#resolveEntityResponses({ entity_responses: event.scene_info.root_entities });\n\n this.#scene_info_promise.resolve({\n aabb: event.scene_info.aabb,\n entity_count: event.scene_info.entity_count,\n triangle_count: event.scene_info.triangle_count,\n root_entities: root_entities,\n });\n };\n}\n\n/**\n * The headless core {@link Scene}, producing the headless {@link Entity}.\n *\n * @category Scene\n */\nexport class Scene extends SceneBase {\n /**\n * @internal\n */\n protected _instantiateEntity({\n parent,\n components,\n options,\n is_visible = true,\n children_rtid = [],\n }: {\n parent: Entity | null;\n components: EntityCore;\n options?: EntityCreationOptions;\n is_visible?: boolean;\n children_rtid?: Array;\n }): Entity {\n return new Entity({ scene: this, parent, components, options, is_visible, children_rtid });\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { ActivityWatcher } from \"@3dverse/livelink.core\";\n\n/**\n * The longest timeout the core's activity watcher can hold, in seconds.\n *\n * The watcher hands `seconds * 1000` to `setTimeout`, whose delay is a signed 32-bit integer: past\n * 2^31 - 1 ms Node warns (`TimeoutOverflowWarning`) and fires the timer at once. So \"never\" is\n * spelled as the largest delay that does not overflow \u2014 a little under 25 days, longer than any\n * session a gateway keeps.\n */\nexport const MAX_INACTIVITY_TIMEOUT_SECONDS = Math.floor((2 ** 31 - 1) / 1000);\n\n/**\n * Turns off the core's inactivity disconnect for an agent connection.\n *\n * The watcher exists for people: a browser client that has sent nothing but heartbeats for six\n * minutes (its defaults: a warning at 300 s, disconnection at 360 s) is a user who walked away, and\n * the gateway gets its seat back. An agent has no user to walk away, and a connection that only\n * *receives* \u2014 a {@link CameraStream} on a non-headless client, which sends nothing after its\n * setup \u2014 looks exactly like one: it was being disconnected six minutes after joining, with\n * `\"inactivity\"` as the reason. Whether an agent should leave a session is {@link Agent}'s\n * `leave_on_condition` policy, not a timer counting messages.\n *\n * The watcher has no \"off\" switch, only timeouts, so both are pushed to the largest value its\n * timers can hold ({@link MAX_INACTIVITY_TIMEOUT_SECONDS}); setting them resets a watcher that is\n * already running.\n */\nexport function disableInactivityTimeout(activity_watcher: ActivityWatcher): void {\n activity_watcher.setTimeouts({\n warn_after_seconds: MAX_INACTIVITY_TIMEOUT_SECONDS - 1,\n timeout_after_seconds: MAX_INACTIVITY_TIMEOUT_SECONDS,\n });\n}\n", "/**\n * Neutralizes a `throw` from a WebSocket `onerror` handler under Node.\n *\n * `livelink.core`'s `GatewayConnection.connect` installs `socket.onerror = () => { throw new\n * Error(\"Gateway socket error\") }`. A throw from an event listener reaches no caller: under Node it\n * escapes undici's dispatch as an `uncaughtException`, with a stack whose top frame is the whole\n * base64 `data:` module the core is evaluated from. It also says nothing new \u2014 `close` always\n * follows `error`, and the core turns that into a `forcibly_closed` disconnect the agent handles.\n *\n * Remove this once the core no longer throws.\n */\n\n//------------------------------------------------------------------------------\ntype ErrorHandler = ((this: WebSocket, event: Event) => unknown) | null;\n\n//------------------------------------------------------------------------------\nlet installed = false;\n\n/**\n * Wraps the global `WebSocket` so that an exception thrown out of an `onerror` handler is logged\n * instead of crashing the process. Handlers that don't throw are unaffected.\n *\n * No-op outside Node, and idempotent.\n */\nexport function installGatewaySocketGuard(): void {\n const is_node = typeof process !== \"undefined\" && process.versions != null && process.versions.node != null;\n if (installed || !is_node || typeof globalThis.WebSocket !== \"function\") {\n return;\n }\n\n installed = true;\n const NativeWebSocket = globalThis.WebSocket;\n\n class GuardedWebSocket extends NativeWebSocket {\n constructor(url: string | URL, protocols?: string | string[]) {\n super(url, protocols);\n\n let handler: ErrorHandler = null;\n let wrapped: ((event: Event) => void) | null = null;\n\n Object.defineProperty(this, \"onerror\", {\n configurable: true,\n enumerable: true,\n get: (): ErrorHandler => handler,\n set: (new_handler: ErrorHandler): void => {\n if (wrapped) {\n this.removeEventListener(\"error\", wrapped);\n wrapped = null;\n }\n\n handler = typeof new_handler === \"function\" ? new_handler : null;\n\n if (handler) {\n const callee = handler;\n wrapped = (event: Event): void => {\n try {\n callee.call(this, event);\n } catch (error) {\n // The message only: the stack of a handler living in the core is\n // rooted in the base64 `data:` module, which is what makes the\n // uncaught version unreadable in the first place.\n const message = error instanceof Error ? error.message : String(error);\n console.warn(`[livelink.agent] suppressed error thrown from onerror: ${message}`);\n }\n };\n this.addEventListener(\"error\", wrapped);\n }\n },\n });\n }\n }\n\n globalThis.WebSocket = GuardedWebSocket;\n}\n", "//------------------------------------------------------------------------------\nimport type { LivelinkCore, UUID } from \"@3dverse/livelink.core\";\nimport { DynamicLoader } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport { LivelinkBase, type LivelinkProgressCallback, type UpdateLoopRates } from \"@livelink.base/LivelinkBase\";\nimport type { Entity } from \"@livelink.base/scene/Entity\";\nimport { Scene } from \"@livelink.base/scene/Scene\";\nimport { Session, type SessionSelector } from \"@livelink.base/session/Session\";\nimport type { SessionInfo } from \"@livelink.base/session/SessionInfo\";\n\n//------------------------------------------------------------------------------\nimport { disableInactivityTimeout } from \"./inactivity\";\nimport { installGatewaySocketGuard } from \"./nodeSocketGuard\";\n\n/**\n * The main class for connecting a headless agent to a 3dverse session.\n *\n * Usage:\n * - `Livelink.start()` to create a new session\n * - `Livelink.join()` to join an existing session\n * - `Livelink.join_or_start()` to join or create a session\n *\n * @category Main\n */\nexport class Livelink extends LivelinkBase {\n /**\n * Creates a new session and connects to it.\n */\n static async start({\n scene_id,\n token,\n is_transient = false,\n session_options,\n onProgress,\n }: {\n scene_id: UUID;\n token: string;\n is_transient?: boolean;\n session_options?: Record;\n onProgress?: LivelinkProgressCallback;\n }): Promise {\n onProgress?.(\"creating-session\");\n const session = await Session.create({ scene_id, token, is_transient, options: session_options });\n return await Livelink.join({ session, onProgress });\n }\n\n /**\n * Connects to an existing session matching the given scene ID.\n * If no session is found, a new session is created.\n */\n static async join_or_start({\n scene_id,\n token,\n session_selector = ({ sessions }: { sessions: Array }): SessionInfo => sessions[0],\n is_transient = false,\n session_options,\n onProgress,\n }: {\n scene_id: UUID;\n token: string;\n session_selector?: SessionSelector;\n is_transient?: boolean;\n session_options?: Record;\n onProgress?: LivelinkProgressCallback;\n }): Promise {\n onProgress?.(\"finding-session\");\n const session = await Session.find({ scene_id, token, session_selector });\n if (session === null) {\n return await Livelink.start({ scene_id, token, is_transient, session_options, onProgress });\n }\n\n try {\n return await Livelink.join({ session, onProgress });\n } catch {\n return await Livelink.join_or_start({\n scene_id,\n token,\n session_selector: ({ sessions }) => {\n const filtered = sessions.filter(s => s.session_id !== session.session_id);\n return filtered.length === 0 ? null : session_selector({ sessions: filtered });\n },\n is_transient,\n session_options,\n onProgress,\n });\n }\n }\n\n /**\n * Connects to an existing session.\n *\n * The session can be provided either as a fully-constructed {@link Session} instance, or as a\n * {@link SessionInfo} along with the authentication token to use against it.\n */\n static async join({\n session,\n onProgress,\n }: {\n session: Session | { session_info: SessionInfo; token: string };\n onProgress?: LivelinkProgressCallback;\n }): Promise {\n onProgress?.(\"initializing\");\n installGatewaySocketGuard();\n await DynamicLoader.load();\n\n const session_instance = session instanceof Session ? session : Session.createFromInfo(session);\n\n const livelink = new Livelink({ session: session_instance });\n await livelink._connect({ is_headless: true, onProgress });\n\n // An agent is never \"idle\" the way a user is; without this the core drops a connection\n // that has sent nothing but heartbeats for six minutes. See `disableInactivityTimeout`.\n disableInactivityTimeout(livelink.activity_watcher);\n\n onProgress?.(\"ready\");\n return livelink;\n }\n\n /**\n * @internal\n */\n protected _createScene({ core }: { core: LivelinkCore }): Scene {\n return new Scene(this, core);\n }\n\n /**\n * Starts the client update loop.\n *\n * Each rate must be a finite number in the `(0, 125]` range so that the resulting interval is\n * at least 8 milliseconds.\n *\n * @throws RangeError if a rate falls outside the accepted range.\n */\n async startUpdateLoop({ updates_per_second, broadcasts_per_second }: UpdateLoopRates = {}): Promise {\n this._startUpdateLoop({ updates_per_second, broadcasts_per_second });\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { Livelink } from \"./Livelink\";\nimport type { SessionLeaveReason } from \"./Agent\";\n\n/**\n * Event emitted when the agent has created a new session.\n *\n * Dispatched by {@link Agent} as `on-session-created`.\n *\n * @event\n * @noInheritDoc\n * @category Main / Events\n */\nexport class SessionCreatedEvent extends Event {\n /**\n * The livelink of the created session.\n */\n public readonly livelink: Livelink;\n\n /**\n * @internal\n */\n constructor({ livelink }: { livelink: Livelink }) {\n super(\"on-session-created\");\n this.livelink = livelink;\n }\n}\n\n/**\n * Event emitted when the agent has joined a pre-existing session.\n *\n * Dispatched by {@link Agent} as `on-session-joined`.\n *\n * @event\n * @noInheritDoc\n * @category Main / Events\n */\nexport class SessionJoinedEvent extends Event {\n /**\n * The livelink of the joined session.\n */\n public readonly livelink: Livelink;\n\n /**\n * @internal\n */\n constructor({ livelink }: { livelink: Livelink }) {\n super(\"on-session-joined\");\n this.livelink = livelink;\n }\n}\n\n/**\n * Event emitted when a session is ready, after it has been created or joined.\n *\n * Dispatched by {@link Agent} as `on-session-ready`.\n *\n * @event\n * @noInheritDoc\n * @category Main / Events\n */\nexport class SessionReadyEvent extends Event {\n /**\n * The livelink of the ready session.\n */\n public readonly livelink: Livelink;\n\n /**\n * @internal\n */\n constructor({ livelink }: { livelink: Livelink }) {\n super(\"on-session-ready\");\n this.livelink = livelink;\n }\n}\n\n/**\n * Event emitted when the agent has left a session.\n *\n * Dispatched by {@link Agent} as `on-session-left`.\n *\n * @event\n * @noInheritDoc\n * @category Main / Events\n */\nexport class SessionLeftEvent extends Event {\n /**\n * The livelink of the left session.\n */\n public readonly livelink: Livelink;\n\n /**\n * The reason why the session was left.\n */\n public readonly reason: SessionLeaveReason;\n\n /**\n * @internal\n */\n constructor({ livelink, reason }: { livelink: Livelink; reason: SessionLeaveReason }) {\n super(\"on-session-left\");\n this.livelink = livelink;\n this.reason = reason;\n }\n}\n\n/**\n * Event emitted when an error occurs in the agent.\n *\n * Dispatched by {@link Agent} as `on-error`.\n *\n * @event\n * @noInheritDoc\n * @category Main / Events\n */\nexport class AgentErrorEvent extends Event {\n /**\n * The error that occurred.\n */\n public readonly error: Error;\n\n /**\n * The livelink of the session tied to the error, or null if the error is not tied to an\n * established session (e.g. a failed join or a failed session list poll).\n */\n public readonly livelink: Livelink | null;\n\n /**\n * @internal\n */\n constructor({ error, livelink }: { error: Error; livelink: Livelink | null }) {\n super(\"on-error\");\n this.error = error;\n this.livelink = livelink;\n }\n}\n\n/**\n * Event emitted when the agent stops, whether it was stopped through {@link Agent.stop} or stopped\n * itself having run out of work (see {@link AgentConfig.mode}).\n *\n * Dispatched by {@link Agent} as `on-stopped`, once all sessions have been left.\n *\n * @event\n * @noInheritDoc\n * @category Main / Events\n */\nexport class AgentStoppedEvent extends Event {\n /**\n * Whether the agent stopped itself rather than being stopped through {@link Agent.stop}.\n */\n public readonly is_automatic: boolean;\n\n /**\n * @internal\n */\n constructor({ is_automatic }: { is_automatic: boolean }) {\n super(\"on-stopped\");\n this.is_automatic = is_automatic;\n }\n}\n\n/**\n * Events emitted by the {@link Agent}.\n *\n * @event\n * @category Main / Events\n */\nexport type AgentEvents = {\n \"on-session-created\": SessionCreatedEvent;\n \"on-session-joined\": SessionJoinedEvent;\n \"on-session-ready\": SessionReadyEvent;\n \"on-session-left\": SessionLeftEvent;\n \"on-stopped\": AgentStoppedEvent;\n \"on-error\": AgentErrorEvent;\n};\n", "//------------------------------------------------------------------------------\nimport type { UUID } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport { Livelink } from \"./Livelink\";\nimport {\n AgentErrorEvent,\n AgentEvents,\n AgentStoppedEvent,\n SessionCreatedEvent,\n SessionJoinedEvent,\n SessionLeftEvent,\n SessionReadyEvent,\n} from \"./AgentEvents\";\nimport type { LivelinkConnectionStage, LivelinkProgressCallback, UpdateLoopRates } from \"@livelink.base/LivelinkBase\";\nimport { Client } from \"@livelink.base/session/Client\";\nimport { Scene } from \"@livelink.base/scene/Scene\";\nimport { Session, type SessionSelector } from \"@livelink.base/session/Session\";\nimport type { SessionInfo } from \"@livelink.base/session/SessionInfo\";\nimport { TypedEventTarget } from \"@livelink.base/TypedEventTarget\";\n\n/**\n * The reason why the agent left a session.\n *\n * - `\"left-on-condition\"`: the agent left because the leave condition was met for longer than\n * the configured `leave_on_condition.after_seconds`.\n * - `\"disconnected\"`: the connection to the session was lost.\n * - `\"stopped\"`: the agent left deliberately, either via {@link Agent.stop} or {@link Agent.leave}.\n *\n * @inline\n * @category Main\n */\nexport type SessionLeaveReason = \"left-on-condition\" | \"disconnected\" | \"stopped\";\n\n/**\n * The strategy used by the agent to attach to sessions of a scene.\n *\n * - `\"start\"`: always create a new session.\n * - `\"join\"`: join a single existing session. If none exists, fail unless `watch` is enabled, in\n * which case the agent idles and joins the first session that appears.\n * - `\"join-or-start\"`: join an existing session if one exists, otherwise create a new one.\n * - `\"join-all\"`: join all existing sessions of the scene. Combine with `watch` to also join\n * sessions appearing later.\n * - `\"manual\"`: attach to nothing on start; the agent stays idle and joins sessions on demand\n * through its `join` method.\n *\n * Except in `\"manual\"` mode and when `watch` is enabled, an agent that loses its last session\n * without being told to \u2014 the session dropped, or its leave condition fired \u2014 has no way of getting\n * more work, and stops itself, dispatching `on-stopped`. A session left deliberately through\n * {@link Agent.leave} does not stop the agent, so it can be rejoined with {@link Agent.join}.\n *\n * @inline\n * @category Main\n */\nexport type AgentMode = \"start\" | \"join\" | \"join-or-start\" | \"join-all\" | \"manual\";\n\n/**\n * Configuration for an agent.\n *\n * @inline\n * @category Main\n */\nexport type AgentConfig = {\n /**\n * The unique identifier of the scene to run.\n */\n scene_id: UUID;\n\n /**\n * The authentication token.\n */\n token: string;\n\n /**\n * The strategy used to attach to sessions of the scene.\n * Defaults to `\"join-or-start\"`.\n */\n mode?: AgentMode;\n\n /**\n * Whether sessions created by the agent are transient. Transient sessions are temporary and\n * changes are not saved. Only used by the `\"start\"` and `\"join-or-start\"` modes.\n */\n is_transient?: boolean;\n\n /**\n * Options for creating the session. Only used by the `\"start\"` and `\"join-or-start\"` modes.\n */\n session_options?: Record;\n\n /**\n * A callback that selects a session from a list of candidate sessions.\n * Only used by the `\"join\"` and `\"join-or-start\"` modes.\n */\n session_selector?: SessionSelector;\n\n /**\n * Poll the session list regularly and join sessions that appear.\n * Only valid with the `\"join\"` and `\"join-all\"` modes.\n */\n watch?: {\n /**\n * The polling interval in seconds. Defaults to 10.\n */\n interval_seconds?: number;\n };\n\n /**\n * Leave a session when the configured leave condition is met for the given duration.\n */\n leave_on_condition?: {\n /**\n * The number of seconds the condition must persist before leaving the session.\n */\n after_seconds: number;\n\n /**\n * The UUID of the `agent_roster` entity, under which each agent registers a marker entity\n * named after its own client id (see {@link Session.client_id}). When set, the default\n * `should_stay` predicate uses the roster's children to identify which of the other clients are agents.\n * If the entity is not found in the scene, an error is logged and the check falls back to plain\n * other-client presence.\n */\n agent_roster_id?: UUID;\n\n /**\n * Determines whether the agent should stay in the session based on the given livelink and the\n * other clients connected. Defaults to stay while a non-agent client is present (see `agent_roster_id`),\n * or any other client is present when roster is absent.\n */\n should_stay?: (params: {\n livelink: Livelink;\n other_clients: ReadonlyArray;\n }) => boolean | Promise;\n };\n\n /**\n * Options for the headless client update loop started in each session.\n */\n headless_client?: UpdateLoopRates;\n\n /**\n * Callback for tracking connection progress of each session the agent attaches to.\n */\n onProgress?: (stage: LivelinkConnectionStage, info: { session_id?: UUID }) => void;\n};\n\n/**\n * @internal\n */\ntype SessionRecord = {\n livelink: Livelink;\n leave_timer: ReturnType | null;\n detachListeners: () => void;\n};\n\n/**\n * The default interval, in seconds, at which the agent watches for sessions to join.\n */\nconst DEFAULT_WATCH_INTERVAL_SECONDS = 10;\n\n/**\n * The default stay predicate.\n *\n * When an `agent_roster_id` is configured and the roster entity is found, the agent stays only\n * while a non-agent client is present: the roster's children are marker entities named after each\n * agent's client id, so any other client whose id is not a marker name is a real viewer. When the\n * roster entity is configured but missing, an error is logged. Absent a usable roster, the agent\n * falls back to staying while any other client with client_type \"guest\" or \"user\" is present.\n * Meaningwhile, it's recommeneded to use an api key as the agent's token, so that the agent is always a \"api\" client\n * and never counts as company, so the roster becomes unnecessary.\n */\nconst defaultShouldStay = async ({\n livelink,\n other_clients,\n agent_roster_id,\n}: {\n livelink: Livelink;\n other_clients: ReadonlyArray;\n agent_roster_id?: UUID;\n}): Promise => {\n if (agent_roster_id) {\n const roster = await livelink.scene.findEntity({ entity_uuid: agent_roster_id });\n if (roster) {\n const marker_names = new Set((await roster.getChildren()).map(child => child.name));\n // Stay only while a non-agent (real viewer) client is present.\n return other_clients.some(client => !marker_names.has(client.id));\n }\n console.error(\n `agent_roster entity ${agent_roster_id} not found in session ${livelink.session.session_id}; ` +\n `falling back to other-client presence.`,\n );\n }\n // Fallback: stay while any other client is connected.\n const viewers = other_clients.filter(({ client_type }) => [\"guest\", \"user\"].includes(client_type));\n return viewers.length > 0;\n};\n\n/**\n * The default session selector, which picks the first session in the list.\n */\nconst defaultSessionSelector: SessionSelector = ({ sessions }) => {\n return sessions[0] ?? null;\n};\n\n/**\n * A headless 3dverse agent.\n *\n * Instantiate this class to create an agent that attaches to one or more sessions of a scene and\n * controls them programmatically. The attachment policy is fixed at construction via the\n * {@link AgentConfig}:\n * - the attachment mode (see {@link AgentMode}),\n * - an optional watch loop polling the session list and joining sessions as they appear,\n * - an optional leave-on-condition policy.\n *\n * Each session the agent attaches to gets its own {@link Livelink}. Observe the lifecycle through\n * the typed events the agent dispatches (see {@link AgentEvents}); every session event carries its\n * `livelink`. The agent is driven by composition \u2014 there is nothing to subclass.\n *\n * Example:\n * ```typescript\n * const agent = new Agent({\n * config: {\n * scene_id: \"...\",\n * token: \"...\",\n * mode: \"join-all\",\n * watch: { interval_seconds: 10 },\n * leave_on_condition: { after_seconds: 60 },\n * },\n * });\n *\n * agent.addEventListener(\"on-session-ready\", async event => {\n * const entity = await event.livelink.scene.findEntity({ entity_uuid: \"...\" });\n * // control the scene...\n * });\n *\n * await agent.start();\n * ```\n *\n * @category Main\n */\nexport class Agent extends TypedEventTarget {\n /**\n * The immutable configuration of the agent, fixed at construction.\n */\n readonly #config: AgentConfig;\n\n /**\n * Active sessions, keyed by session id.\n */\n readonly #records = new Map();\n\n /**\n * Sessions with a join attempt in flight, to dedup concurrent attempts.\n */\n readonly #joining = new Set();\n\n /**\n * Sessions asked to leave while their join was still in flight, keyed by session id with the\n * requested reason. Consumed by {@link #establish} to abort the join instead of staying attached,\n * or by {@link #join} when the join failed before reaching {@link #establish}.\n */\n readonly #leave_during_join = new Map();\n\n /**\n * Sessions the agent has left, with the reason, used by the watch rejoin policy.\n */\n readonly #left = new Map();\n\n /**\n *\n */\n #watch_timeout: ReturnType | null = null;\n\n /**\n * Whether the agent is currently started. Everything the agent does off the back of a timer or\n * an in-flight promise checks this before touching a session, so that a `stop()` landing\n * mid-flight is honoured.\n */\n #started: boolean = false;\n\n /**\n * The configuration this agent was built with, fixed at construction. Read-only: an agent's\n * attach policy and update rates are settled before it starts.\n */\n get config(): Readonly {\n return this.#config;\n }\n\n /**\n * The livelinks of all sessions the agent is currently attached to.\n */\n get livelinks(): ReadonlyArray {\n return Array.from(this.#records.values(), record => record.livelink);\n }\n\n /**\n * The session the agent is connected to.\n * Only valid when the agent is attached to exactly one session, throws otherwise.\n * Convenience for single-session agents; use {@link livelinks} otherwise.\n */\n get session(): Session {\n return this.#single_livelink.session;\n }\n\n /**\n * The scene managed by the agent.\n * Only valid when the agent is attached to exactly one session, throws otherwise.\n * Convenience for single-session agents; use {@link livelinks} otherwise.\n */\n get scene(): Scene {\n return this.#single_livelink.scene;\n }\n\n /**\n *\n */\n get #single_livelink(): Livelink {\n const livelinks = this.livelinks;\n if (livelinks.length === 0) {\n throw new Error(\"Agent is not connected to a session\");\n }\n if (livelinks.length > 1) {\n throw new Error(\"Agent is connected to multiple sessions, use livelinks or getLivelink instead\");\n }\n return livelinks[0];\n }\n\n /**\n * @param config - The immutable configuration of the agent.\n */\n constructor({ config }: { config: AgentConfig }) {\n super();\n\n const mode = config.mode ?? \"join-or-start\";\n if (config.watch && mode !== \"join\" && mode !== \"join-all\") {\n throw new Error(`The watch option is only valid with the \"join\" and \"join-all\" modes, got \"${mode}\".`);\n }\n\n this.#config = config;\n }\n\n /**\n * Get the livelink of a session the agent is attached to, or null if not attached to it.\n */\n getLivelink({ session_id }: { session_id: UUID }): Livelink | null {\n return this.#records.get(session_id)?.livelink ?? null;\n }\n\n /**\n * Attach to sessions according to the configured mode and start the agent.\n * Resolves once the initial attachment wave is done; the watch loop, if enabled, keeps\n * running in the background.\n *\n * @throws If the agent is already started, or if the initial attachment fails. A failed start\n * leaves the agent stopped: any session attached by the failed wave is left behind.\n */\n async start(): Promise {\n if (this.#started) {\n throw new Error(\"Agent is already started\");\n }\n this.#started = true;\n this.#joining.clear();\n this.#left.clear();\n this.#leave_during_join.clear();\n\n try {\n await this.#attach();\n\n if (this.#config.watch && this.#started) {\n this.#scheduleWatchTick();\n }\n } catch (error) {\n await this.stop();\n throw error;\n }\n }\n\n /**\n * The initial attachment wave: attach to sessions according to the configured mode.\n */\n async #attach(): Promise {\n const { scene_id, token, is_transient, session_options, session_selector } = this.#config;\n const mode = this.#config.mode ?? \"join-or-start\";\n\n switch (mode) {\n case \"start\": {\n const livelink = await Livelink.start({\n scene_id,\n token,\n is_transient,\n session_options,\n onProgress: this.#makeProgressCallback({}),\n });\n await this.#establish({ livelink });\n break;\n }\n\n case \"join-or-start\": {\n const livelink = await Livelink.join_or_start({\n scene_id,\n token,\n session_selector,\n is_transient,\n session_options,\n onProgress: this.#makeProgressCallback({}),\n });\n await this.#establish({ livelink });\n break;\n }\n\n case \"join\": {\n const sessions = await Session.list({ scene_id, token });\n const selector = session_selector ?? defaultSessionSelector;\n const session_info = sessions.length > 0 ? selector({ sessions }) : null;\n if (session_info) {\n await this.#join({ session_info });\n } else if (!this.#config.watch) {\n throw new Error(`No session found for scene ${scene_id}.`);\n }\n break;\n }\n\n case \"join-all\": {\n const sessions = await Session.list({ scene_id, token });\n await Promise.all(sessions.map(session_info => this.#join({ session_info })));\n break;\n }\n\n case \"manual\": {\n // Attach to nothing on start; the agent joins sessions on demand via join().\n break;\n }\n }\n }\n\n /**\n * Stop the agent: leave all sessions (with reason `\"stopped\"`) and stop the watch loop.\n * Resolves once all sessions have been left; do any post-stop cleanup after it returns.\n * No-op if the agent is not started.\n *\n * Dispatches `on-stopped`. The agent may also stop itself, dispatching the same event with\n * `is_automatic` set \u2014 see {@link AgentMode}.\n */\n async stop(): Promise {\n await this.#stop({ is_automatic: false });\n }\n\n /**\n * Stop the agent, recording whether it stopped itself. A no-op if not started.\n */\n async #stop({ is_automatic }: { is_automatic: boolean }): Promise {\n if (!this.#started) {\n return;\n }\n // Cleared before any await: it is what makes #maybeStopWhenIdle a no-op for the leaves\n // below, so tearing down the last session here cannot re-enter this method.\n this.#started = false;\n\n if (this.#watch_timeout !== null) {\n clearTimeout(this.#watch_timeout);\n this.#watch_timeout = null;\n }\n\n const session_ids = Array.from(this.#records.keys());\n const leave_promises = session_ids.map(session_id => this.#leave({ session_id, reason: \"stopped\" }));\n await Promise.all(leave_promises);\n\n this._dispatchEvent(new AgentStoppedEvent({ is_automatic }));\n }\n\n /**\n * Stop the agent once it has run out of work and has no way of getting more on its own: nothing\n * attached, nothing joining, no watch loop to pick up a new session. The `\"manual\"` mode is\n * excluded because its consumer drives the joins, and so is a deliberate {@link Agent.leave},\n * which documents rejoining later through {@link Agent.join}.\n *\n * Without this the process behind a single-session agent would stay alive with nothing left to\n * do, since the update loop and the leave timer are gone but nobody said to shut down.\n */\n async #maybeStopWhenIdle({ reason }: { reason: SessionLeaveReason }): Promise {\n const mode = this.#config.mode ?? \"join-or-start\";\n const is_idle = this.#records.size === 0 && this.#joining.size === 0;\n\n if (!this.#started || !is_idle || reason === \"stopped\" || mode === \"manual\" || this.#config.watch) {\n return;\n }\n\n console.log(\n `[agent] Last session left (\"${reason}\") and the \"${mode}\" mode has no watch loop to pick up ` +\n `another one: stopping.`,\n );\n\n await this.#stop({ is_automatic: true });\n }\n\n /**\n * Leave a single session deliberately. The watch loop never rejoins it on its own; call\n * {@link Agent.join} to rejoin it later.\n */\n async leave({ session_id }: { session_id: UUID }): Promise {\n await this.#leave({ session_id, reason: \"stopped\" });\n }\n\n /**\n * Join a session on demand, in particular to rejoin one previously left with\n * {@link Agent.leave}. Clears any prior leave marker so the watch loop treats the session\n * normally afterwards. No-op if the agent is not started, or if it is already attached to, or\n * attaching, the session.\n *\n * @throws If no session with the given id is running the agent's scene.\n */\n async join({ session_id }: { session_id: UUID }): Promise {\n if (!this.#started) {\n return;\n }\n\n this.#left.delete(session_id);\n\n if (this.#records.has(session_id) || this.#joining.has(session_id)) {\n return;\n }\n\n const sessions = await Session.list({\n scene_id: this.#config.scene_id,\n token: this.#config.token,\n });\n const session_info = sessions.find(info => info.session_id === session_id);\n if (!session_info) {\n throw new Error(`No session ${session_id} found for scene ${this.#config.scene_id}.`);\n }\n\n await this.#join({ session_info });\n }\n\n /**\n * Leave a session for the given reason.\n */\n async #leave({ session_id, reason }: { session_id: UUID; reason: SessionLeaveReason }): Promise {\n const record = this.#records.get(session_id);\n if (!record) {\n // No record yet: a join for this session may still be in flight (its livelink is not\n // attached until #establish runs). Record the leave request so #establish aborts the\n // join instead of silently completing and staying attached.\n if (this.#joining.has(session_id)) {\n this.#leave_during_join.set(session_id, reason);\n }\n return;\n }\n\n this.#left.set(session_id, reason);\n await this.#teardownRecord({ session_id, record });\n\n this._dispatchEvent(new SessionLeftEvent({ livelink: record.livelink, reason }));\n\n // After the event, so a listener still sees the agent started when it handles the leave.\n await this.#maybeStopWhenIdle({ reason });\n }\n\n /**\n * Consume a leave request recorded while the join was in flight, moving its reason to the left\n * markers so the watch rejoin policy honours it. Returns the reason, or null if none was pending.\n */\n #consumePendingLeave({ session_id }: { session_id: UUID }): SessionLeaveReason | null {\n const reason = this.#leave_during_join.get(session_id);\n if (reason === undefined) {\n return null;\n }\n\n this.#leave_during_join.delete(session_id);\n this.#left.set(session_id, reason);\n return reason;\n }\n\n /**\n * Tear down an attached session's record: remove it from the agent, clear the leave timer,\n * detach the lifecycle listeners and disconnect the livelink. Disconnection errors are\n * dispatched as `on-error` events, never thrown.\n */\n async #teardownRecord({ session_id, record }: { session_id: UUID; record: SessionRecord }): Promise {\n this.#records.delete(session_id);\n\n if (record.leave_timer !== null) {\n clearTimeout(record.leave_timer);\n record.leave_timer = null;\n }\n record.detachListeners();\n\n const { livelink } = record;\n try {\n await livelink.disconnect();\n } catch (error) {\n this._dispatchEvent(new AgentErrorEvent({ error: error as Error, livelink }));\n }\n }\n\n /**\n *\n */\n #makeProgressCallback({ session_id }: { session_id?: UUID }): LivelinkProgressCallback | undefined {\n const onProgress = this.#config.onProgress;\n if (!onProgress) {\n return undefined;\n }\n return stage => {\n onProgress(stage, { session_id });\n };\n }\n\n /**\n * Join a session from its info. Errors are dispatched as `on-error` events, never thrown.\n */\n async #join({ session_info }: { session_info: SessionInfo }): Promise {\n const session_id = session_info.session_id;\n if (this.#records.has(session_id) || this.#joining.has(session_id)) {\n return;\n }\n\n this.#joining.add(session_id);\n try {\n const livelink = await Livelink.join({\n session: { session_info, token: this.#config.token },\n onProgress: this.#makeProgressCallback({ session_id }),\n });\n await this.#establish({ livelink });\n } catch (error) {\n this._dispatchEvent(new AgentErrorEvent({ error: error as Error, livelink: null }));\n } finally {\n this.#joining.delete(session_id);\n // #establish consumes the marker on the paths that reach it. If the join failed before\n // that, honour the leave here so the watch loop does not rejoin a session we left.\n this.#consumePendingLeave({ session_id });\n }\n }\n\n /**\n * Set up an attached session: update loop, lifecycle listeners, leave timer, and dispatch the\n * `on-session-created`/`on-session-joined` and `on-session-ready` events.\n */\n async #establish({ livelink }: { livelink: Livelink }): Promise {\n if (!this.#started) {\n await livelink.disconnect();\n return;\n }\n\n const { session } = livelink;\n const { session_id } = session;\n\n // A leave()/stop() may have targeted this session while its join was still in flight. Abort\n // the join rather than staying attached: mark it left (so the watch loop honours the reason)\n // and disconnect without ever dispatching created/joined/ready for a session we are leaving.\n const pending_leave = this.#consumePendingLeave({ session_id });\n if (pending_leave !== null) {\n try {\n await livelink.disconnect();\n } catch (error) {\n this._dispatchEvent(new AgentErrorEvent({ error: error as Error, livelink }));\n }\n return;\n }\n\n const record: SessionRecord = {\n livelink,\n leave_timer: null,\n detachListeners: () => {},\n };\n\n const onClientCountChanged = (): void => {\n // The evaluation awaits scene queries and a possibly user-provided `should_stay`, either\n // of which can reject on a network hiccup. Catch here: an unhandled rejection from this\n // listener would otherwise crash a Node agent (the sibling `onDisconnected` guards too).\n void this.#evaluateLeaveCondition({ record }).catch((error: Error) => {\n this._dispatchEvent(new AgentErrorEvent({ error, livelink }));\n });\n };\n const onDisconnected = (): void => {\n void this.#leave({ session_id, reason: \"disconnected\" }).catch((error: Error) => {\n this._dispatchEvent(new AgentErrorEvent({ error, livelink }));\n });\n };\n\n session.addEventListener(\"on-client-joined\", onClientCountChanged);\n session.addEventListener(\"on-client-left\", onClientCountChanged);\n session.addEventListener(\"on-disconnected\", onDisconnected);\n record.detachListeners = (): void => {\n session.removeEventListener(\"on-client-joined\", onClientCountChanged);\n session.removeEventListener(\"on-client-left\", onClientCountChanged);\n session.removeEventListener(\"on-disconnected\", onDisconnected);\n };\n\n this.#records.set(session_id, record);\n this.#left.delete(session_id);\n\n try {\n await livelink.startUpdateLoop(this.#config.headless_client);\n await this.#registerInRoster({ livelink });\n await this.#evaluateLeaveCondition({ record });\n } catch (error) {\n // Setup failed (e.g. an invalid update rate or a rejecting `should_stay`): tear the\n // session down so it does not linger with its listeners attached and its update loop\n // running. Skipped if a concurrent disconnect already removed the record.\n if (this.#records.get(session_id) === record) {\n await this.#teardownRecord({ session_id, record });\n }\n throw error;\n }\n\n // The session may have disconnected during the awaits above, in which case `onDisconnected`\n // already ran the leave (removed the record and dispatched `on-session-left`). Never fire\n // the created/joined/ready events for a session that is gone.\n if (!this.#started || this.#records.get(session_id) !== record) {\n return;\n }\n\n if (session.has_been_created) {\n this._dispatchEvent(new SessionCreatedEvent({ livelink }));\n } else {\n this._dispatchEvent(new SessionJoinedEvent({ livelink }));\n }\n this._dispatchEvent(new SessionReadyEvent({ livelink }));\n }\n\n /**\n * Register the agent in the `agent_roster` entity by creating a marker entity named after the\n * agent's client id. The marker is removed automatically when the agent disconnects\n * (`delete_on_client_disconnection`). No-op when no `agent_roster_id` is configured. Errors are\n * dispatched as `on-error` events so a roster failure never aborts the session setup.\n */\n async #registerInRoster({ livelink }: { livelink: Livelink }): Promise {\n const leave_on_condition = this.#config.leave_on_condition;\n const agent_roster_id = leave_on_condition?.agent_roster_id;\n if (!agent_roster_id) {\n return;\n }\n\n try {\n const client_id = livelink.session.client_id;\n const roster = await livelink.scene.findEntity({ entity_uuid: agent_roster_id });\n if (roster && client_id) {\n await livelink.scene.newEntity({\n name: client_id,\n parent: roster,\n components: {},\n options: { delete_on_client_disconnection: true },\n });\n } else {\n console.error(\n `agent_roster entity ${agent_roster_id} (or client id) missing in session ` +\n `${livelink.session.session_id}; leave-when-alone will fall back to other-client presence.`,\n );\n }\n } catch (error) {\n this._dispatchEvent(new AgentErrorEvent({ error: error as Error, livelink }));\n }\n }\n\n /**\n * Evaluate whether the agent should stay in the session, using the configured `should_stay`\n * predicate or the default roster/other-client presence check. Returns `true` (stay) when no\n * leave condition is configured.\n */\n async #shouldStay({ livelink }: { livelink: Livelink }): Promise {\n const leave_on_condition = this.#config.leave_on_condition;\n if (!leave_on_condition) {\n return true;\n }\n\n const other_clients = livelink.session.other_clients;\n return leave_on_condition.should_stay\n ? leave_on_condition.should_stay({ livelink, other_clients })\n : defaultShouldStay({\n livelink,\n other_clients,\n agent_roster_id: leave_on_condition.agent_roster_id,\n });\n }\n\n /**\n * Arm the leave timer if the leave condition is not met, clear it otherwise.\n */\n async #evaluateLeaveCondition({ record }: { record: SessionRecord }): Promise {\n if (!this.#config.leave_on_condition) {\n return;\n }\n\n const { livelink } = record;\n if (await this.#shouldStay({ livelink })) {\n if (record.leave_timer !== null) {\n clearTimeout(record.leave_timer);\n record.leave_timer = null;\n }\n return;\n }\n\n if (record.leave_timer === null) {\n record.leave_timer = setTimeout(() => {\n record.leave_timer = null;\n void this.#leaveIfStillAlone({ record }).catch((error: Error) => {\n this._dispatchEvent(new AgentErrorEvent({ error, livelink }));\n });\n }, this.#config.leave_on_condition.after_seconds * 1000);\n }\n }\n\n /**\n * Leave the session because the leave condition held for the configured duration \u2014 but only\n * after re-checking it. Condition evaluations are async and unordered, so a stale \"alone\"\n * evaluation can arm the timer after a newer one saw company; re-evaluating here before leaving\n * closes that race and prevents abandoning a session with a live viewer.\n */\n async #leaveIfStillAlone({ record }: { record: SessionRecord }): Promise {\n const { livelink } = record;\n const session_id = livelink.session.session_id;\n\n // The record may have been torn down (disconnect/stop/leave) while the timer was pending.\n if (this.#records.get(session_id) !== record) {\n return;\n }\n\n try {\n if (await this.#shouldStay({ livelink })) {\n // Company reappeared: do not leave. A later client event re-arms the timer if needed.\n return;\n }\n } catch (error) {\n // Uncertain: err on staying rather than abandoning a possibly-occupied session.\n this._dispatchEvent(new AgentErrorEvent({ error: error as Error, livelink }));\n return;\n }\n\n // Re-check the record is still ours after the await above before leaving.\n if (this.#records.get(session_id) !== record) {\n return;\n }\n\n const after_seconds = this.#config.leave_on_condition?.after_seconds;\n console.log(`[agent] Nothing to stay for in session ${session_id} for ${after_seconds}s: leaving it.`);\n\n await this.#leave({ session_id, reason: \"left-on-condition\" });\n }\n\n /**\n *\n */\n #scheduleWatchTick(): void {\n const interval_seconds = this.#config.watch?.interval_seconds ?? DEFAULT_WATCH_INTERVAL_SECONDS;\n this.#watch_timeout = setTimeout(() => {\n void this.#watchTick();\n }, interval_seconds * 1000);\n }\n\n /**\n * A single watch poll: list the sessions of the scene and join the new ones according to the\n * mode and the rejoin policy. The loop survives any error.\n */\n async #watchTick(): Promise {\n try {\n const sessions = await Session.list({\n scene_id: this.#config.scene_id,\n token: this.#config.token,\n });\n\n if (!this.#started) {\n return;\n }\n\n const candidates = sessions.filter(session_info => {\n const session_id = session_info.session_id;\n if (this.#records.has(session_id) || this.#joining.has(session_id)) {\n return false;\n }\n return this.#mayRejoin({ session_info });\n });\n\n const mode = this.#config.mode ?? \"join-or-start\";\n if (mode === \"join-all\") {\n await Promise.all(candidates.map(session_info => this.#join({ session_info })));\n } else if (mode === \"join\") {\n if (this.#records.size === 0 && this.#joining.size === 0 && candidates.length > 0) {\n const selector = this.#config.session_selector ?? defaultSessionSelector;\n const session_info = selector({ sessions: candidates });\n if (session_info) {\n await this.#join({ session_info });\n }\n }\n }\n } catch (error) {\n this._dispatchEvent(new AgentErrorEvent({ error: error as Error, livelink: null }));\n } finally {\n if (this.#started) {\n this.#scheduleWatchTick();\n }\n }\n }\n\n /**\n * The watch rejoin policy for sessions the agent has previously left:\n * - left on condition: rejoin only once the listed session has company again,\n * - left because disconnected: rejoin freely,\n * - left deliberately: never rejoin.\n *\n * The agent is disconnected while this runs, so it cannot consult the `agent_roster` markers\n * (which require a live scene). It instead judges company from the session list's clients:\n * any clients with client_type \"guest\" or \"user\" count as company.\n * Meaningwhile, it's recommeneded to use an api key as the agent's token, so that the agent is always a \"api\" client\n * and never counts as company, so the roster becomes unnecessary.\n */\n #mayRejoin({ session_info }: { session_info: SessionInfo }): boolean {\n const reason = this.#left.get(session_info.session_id);\n if (reason === undefined) {\n return true;\n }\n\n switch (reason) {\n case \"stopped\": {\n return false;\n }\n\n case \"disconnected\": {\n this.#left.delete(session_info.session_id);\n return true;\n }\n\n case \"left-on-condition\": {\n const { clients, session_id } = session_info;\n const viewers = clients?.filter(({ client_type }) => [\"guest\", \"user\"].includes(client_type)) ?? [];\n if (viewers.length > 0) {\n this.#left.delete(session_id);\n return true;\n }\n return false;\n }\n }\n }\n}\n", "/**\n * Match a channel pattern against an event channel.\n *\n * Patterns use MQTT-style topic wildcards over `/`-separated segments: `+` or `*` matches exactly\n * one segment, a trailing `#` matches the rest. A pattern without wildcards is an exact match.\n *\n * ```\n * matchChannel(\"uagv/+/visualization\", \"uagv/23070/visualization\") // true\n * matchChannel(\"uagv/#\", \"uagv/23070/state\") // true\n * matchChannel(\"file\", \"file\") // true\n * ```\n *\n * @category Data\n */\nexport function matchChannel(pattern: string, channel: string): boolean {\n if (pattern === channel) {\n return true;\n }\n const pattern_segments = pattern.split(\"/\");\n const channel_segments = channel.split(\"/\");\n\n for (let i = 0; i < pattern_segments.length; i++) {\n const segment = pattern_segments[i];\n if (segment === \"#\") {\n return i === pattern_segments.length - 1;\n }\n if (i >= channel_segments.length) {\n return false;\n }\n if (segment !== \"+\" && segment !== \"*\" && segment !== channel_segments[i]) {\n return false;\n }\n }\n return pattern_segments.length === channel_segments.length;\n}\n", "//------------------------------------------------------------------------------\nimport type { EventSink, Transport } from \"../Transport\";\nimport { matchChannel } from \"../util/channel\";\n\n/**\n * Where a {@link PlaybackTransport} reads its recording from.\n *\n * A recording is a *dump of an event stream*, not necessarily a file: the same bytes are just as\n * likely to arrive as a string already in memory, an HTTP response, or records the caller parsed\n * itself. Whatever the form, the recorded content is one of three shapes:\n *\n * - an **MQTT trace dump** \u2014 lines of ` `; the topic becomes the event's channel;\n * - a JSON array of **envelopes** \u2014 `{ \"channel\": \"...\", \"payload\": {...}, \"timestamp\": \"...\" }`;\n * - a JSON array of **bare payloads** \u2014 no channel information, so every event is replayed on\n * {@link PlaybackTransportConfig.default_channel}.\n *\n * @category Data\n */\nexport type PlaybackSource =\n //--------------------------------------------------------------------------\n // Already in memory. A `string` is the dump *itself* \u2014 never a path or a URL, which are\n // spelled out below so the two can never be confused.\n | string\n | Uint8Array\n | ArrayBuffer\n /** Records the caller already parsed: envelopes or bare payloads, skipping `JSON.parse`. */\n | Array\n\n //--------------------------------------------------------------------------\n // Read to completion before the replay starts (see the class doc).\n | ReadableStream\n | AsyncIterable\n\n //--------------------------------------------------------------------------\n // Located. These stay plain JSON, so a `TransportSpec` naming them survives a round trip\n // through a config file or an HTTP API.\n /** A path on the local file system. **Node.js only.** */\n | { file_path: string }\n /** Anything `fetch` can retrieve. Works in the browser and in Node.js. */\n | { url: string; init?: RequestInit }\n\n //--------------------------------------------------------------------------\n /** Produced on `start()`, for a source that cannot be built ahead of time. */\n | (() => PlaybackSource | Promise);\n\n/**\n * Configuration of a {@link PlaybackTransport}.\n *\n * @inline\n * @category Data\n */\nexport type PlaybackTransportConfig = {\n /**\n * The recording to replay.\n */\n source: PlaybackSource;\n\n /**\n * Only replay the messages whose channel matches this MQTT-style pattern (`+`/`*` = one segment,\n * trailing `#` = the rest) \u2014 e.g. `\"uagv/+/+/+/visualization\"` to replay only the position\n * frames out of a full VDA 5050 trace. Omitted = replay everything.\n */\n channel_filter?: string;\n\n /**\n * The channel given to messages that carry none (a bare-payload recording). Defaults to\n * `\"playback\"`.\n */\n default_channel?: string;\n\n /**\n * How fast to replay, relative to the recorded pace: `1` (the default) replays in real time,\n * `10` replays ten times faster. Only meaningful for a recording that carries timestamps \u2014\n * without them messages are replayed back to back whatever the speed.\n */\n speed?: number;\n\n /**\n * Whether to start over when the recording ends. Defaults to `true`.\n */\n loop?: boolean;\n};\n\n/**\n * Configuration of the deprecated `\"file\"` transport kind.\n *\n * @deprecated Use {@link PlaybackTransportConfig} with `source: { file_path }` and the `\"playback\"`\n * kind.\n *\n * @category Data\n */\nexport type FileTransportConfig = {\n /** Path of the playback file. Relative paths resolve against the process working directory. */\n file_path: string;\n /** See {@link PlaybackTransportConfig.channel_filter}. */\n channel_filter?: string;\n /** See {@link PlaybackTransportConfig.default_channel}. */\n default_channel?: string;\n};\n\n/**\n * One message of a parsed recording.\n */\ntype PlaybackMessage = {\n channel: string;\n payload: unknown;\n /** Epoch milliseconds, or null when the message carries no usable timestamp. */\n timestamp: number | null;\n};\n\n/**\n * How many `() => source` hops are followed before giving up, so a factory returning itself fails\n * loudly instead of hanging.\n */\nconst MAX_SOURCE_INDIRECTIONS = 8;\n\n/**\n * How many messages one timer tick may emit before yielding to the event loop, so a dense stretch\n * of a recording never starves it.\n */\nconst MAX_MESSAGES_PER_TICK = 256;\n\n/**\n * Replays a recorded sequence of messages, pacing them from their own timestamps and looping when\n * the sequence ends.\n *\n * The recording comes from wherever {@link PlaybackSource} allows \u2014 a file, a URL, a string, a\n * buffer, a stream, an array of records \u2014 so the same transport drives a Node.js replay from disk\n * and a browser demo from a bundled dump. Only `{ file_path }` is Node-only.\n *\n * **It buffers the whole recording before replaying it.** Looping needs every message to stay in\n * memory, and pacing needs the first timestamp before the second message can be scheduled; a\n * streamed source is therefore drained to completion by `start()`. This is a replayer, not a reader\n * of live streams \u2014 for a genuinely live source, write a {@link Transport} that pushes as it reads.\n *\n * **The recorded channel is preserved**, so a mapping selecting on `channel` behaves identically\n * against a live broker and against a dump of that broker \u2014 which is the point of replaying in the\n * first place. Only a recording that carries no channel information at all falls back to a constant\n * ({@link PlaybackTransportConfig.default_channel}, `\"playback\"` by default).\n *\n * @category Data\n */\nexport class PlaybackTransport implements Transport {\n /**\n * The sink to push replayed events into.\n */\n readonly #sink: EventSink;\n\n /**\n * The transport configuration.\n */\n readonly #config: PlaybackTransportConfig;\n\n /**\n * The messages loaded from the recording.\n */\n #messages: Array = [];\n\n /**\n * The timer ID for the next scheduled message, or null if no message is scheduled.\n */\n #timer: ReturnType | null = null;\n\n /**\n * The index of the next message to be sent.\n */\n #current_index = 0;\n\n /**\n * The timestamp when playback started, in epoch milliseconds, or null if not started.\n */\n #start_time: number | null = null;\n\n /**\n * The timestamp of the first message of the recording, in epoch milliseconds, or null if it has\n * none \u2014 in which case messages are replayed back to back.\n */\n #base_timestamp: number | null = null;\n\n /**\n * Whether the transport has been stopped. Used to prevent scheduling further messages after\n * stop. Cleared on start.\n */\n #stopped = false;\n\n /**\n *\n */\n constructor(config: PlaybackTransportConfig, sink: EventSink) {\n if (config.source === undefined || config.source === null) {\n throw new Error(\"source is required in transport config\");\n }\n if (config.speed !== undefined && (!isFinite(config.speed) || config.speed <= 0)) {\n throw new Error(`speed must be a finite number greater than 0, got ${config.speed}`);\n }\n this.#sink = sink;\n this.#config = config;\n }\n\n /**\n * Read the recording and start replaying its messages.\n */\n async start(): Promise {\n this.#stopped = false;\n\n const content = await readSource(this.#config.source);\n\n let messages: Array;\n try {\n messages = typeof content === \"string\" ? this.#parse(content) : this.#parseRecords(content);\n } catch (error) {\n throw new Error(\n `Failed to parse recording: ${error instanceof Error ? error.message : String(error)}`,\n { cause: error },\n );\n }\n\n const filter = this.#config.channel_filter;\n this.#messages =\n filter === undefined ? messages : messages.filter(message => matchChannel(filter, message.channel));\n\n if (messages.length > 0 && this.#messages.length === 0) {\n console.warn(\n `[playback-transport] None of the ${messages.length} recorded messages match the channel filter ` +\n `\"${filter}\"; nothing will be replayed.`,\n );\n }\n\n this.#current_index = 0;\n this.#start_time = Date.now();\n this.#base_timestamp = this.#messages[0]?.timestamp ?? null;\n this.#scheduleNext();\n }\n\n /**\n * Stop the playback.\n */\n async stop(): Promise {\n this.#stopped = true;\n if (this.#timer !== null) {\n clearTimeout(this.#timer);\n this.#timer = null;\n }\n }\n\n /**\n * Parse the text of a recording, telling a JSON array from an MQTT trace dump.\n */\n #parse(content: string): Array {\n let parsed: unknown;\n try {\n parsed = JSON.parse(content);\n } catch {\n return this.#parseMqttDump(content);\n }\n\n if (!Array.isArray(parsed)) {\n throw new Error(\"A JSON recording must be an array\");\n }\n return this.#parseRecords(parsed);\n }\n\n /**\n * Parse already-decoded records \u2014 envelopes, bare payloads, or a mix of both.\n */\n #parseRecords(entries: Array): Array {\n const default_channel = this.#config.default_channel ?? \"playback\";\n return entries.map(entry => {\n // An envelope carries its own channel; anything else is a bare payload.\n if (entry !== null && typeof entry === \"object\" && \"channel\" in entry && \"payload\" in entry) {\n const envelope = entry as { channel: unknown; payload: unknown; timestamp?: unknown };\n return {\n channel: typeof envelope.channel === \"string\" ? envelope.channel : default_channel,\n payload: envelope.payload,\n timestamp: parseTimestamp(envelope.timestamp) ?? parseTimestamp(readTimestamp(envelope.payload)),\n };\n }\n return {\n channel: default_channel,\n payload: entry,\n timestamp: parseTimestamp(readTimestamp(entry)),\n };\n });\n }\n\n /**\n * Parse an MQTT trace dump \u2014 lines of ` ` \u2014 preserving each message's topic as its\n * channel. Malformed lines are skipped.\n */\n #parseMqttDump(content: string): Array {\n const messages: Array = [];\n for (const line of content.split(\"\\n\")) {\n const trimmed = line.trim();\n if (!trimmed) {\n continue;\n }\n const space_index = trimmed.indexOf(\" \");\n if (space_index === -1) {\n continue;\n }\n const channel = trimmed.slice(0, space_index);\n try {\n const payload = JSON.parse(trimmed.slice(space_index + 1));\n messages.push({ channel, payload, timestamp: parseTimestamp(readTimestamp(payload)) });\n } catch {\n // Skip malformed lines.\n }\n }\n\n if (messages.length === 0) {\n throw new Error(\"The recording is neither valid JSON nor a recognised MQTT trace dump\");\n }\n return messages;\n }\n\n /**\n * Emit every message whose recorded time has come, then arm a timer for the next one. Loops\n * back to the start at the end of the sequence unless `loop` is off. Does nothing once stopped.\n *\n * Messages that are due are emitted in the same tick rather than one timer apart: recorded at\n * the same instant, they should be replayed at the same instant, and a timer per message would\n * cap the replay at the host's timer granularity \u2014 around 1 kHz in Node, and 250 Hz in a\n * browser, which clamps nested timeouts to 4 ms. That cap would silently slow down a dense\n * recording, and `speed` with it.\n */\n #scheduleNext(): void {\n if (this.#stopped) {\n return;\n }\n\n let emitted = 0;\n for (;;) {\n if (this.#current_index >= this.#messages.length) {\n // An empty sequence has nothing to loop over; scheduling again would spin.\n if (this.#config.loop === false || this.#messages.length === 0) {\n return;\n }\n // Loop the recording from the messages already in memory. Re-running `start()` here\n // would re-read and re-parse the source on every lap, and its rejection would be\n // unhandled (fatal under Node's default `--unhandled-rejections=throw`).\n this.#current_index = 0;\n this.#start_time = Date.now();\n }\n\n const message = this.#messages[this.#current_index];\n const delay = this.#delayFor(message);\n\n // Yield at the burst cap even when nothing is due yet: a recording carrying no\n // timestamps at all paces off nothing, and would otherwise spin the loop forever.\n if (delay > 0 || emitted >= MAX_MESSAGES_PER_TICK) {\n this.#timer = setTimeout(() => this.#scheduleNext(), delay);\n return;\n }\n\n // Not awaited on purpose: the sink may be async but must not delay the next message.\n void this.#emit(message);\n this.#current_index++;\n emitted++;\n }\n }\n\n /**\n * How long to wait before a message is due, from its timestamp relative to the first one and\n * the configured speed. Zero for a recording that carries no usable timestamps.\n */\n #delayFor(message: PlaybackMessage): number {\n if (this.#base_timestamp === null || message.timestamp === null || this.#start_time === null) {\n return 0;\n }\n const speed = this.#config.speed ?? 1;\n return Math.max(0, (message.timestamp - this.#base_timestamp) / speed - (Date.now() - this.#start_time));\n }\n\n /**\n *\n */\n async #emit(message: PlaybackMessage): Promise {\n try {\n await this.#sink.ingest({\n channel: message.channel,\n payload: message.payload,\n received_at: new Date(),\n ...(message.timestamp !== null ? { source_timestamp: new Date(message.timestamp) } : {}),\n });\n } catch (error) {\n console.error(`[playback-transport] Sink failed:`, error);\n }\n }\n}\n\n/**\n * Resolve any {@link PlaybackSource} down to the recording's text, or to the records it already is.\n */\nasync function readSource(source: PlaybackSource, depth = 0): Promise> {\n if (typeof source === \"function\") {\n if (depth >= MAX_SOURCE_INDIRECTIONS) {\n throw new Error(\n `Playback source still resolved to a function after ${MAX_SOURCE_INDIRECTIONS} hops; ` +\n `it most likely returns itself.`,\n );\n }\n return readSource(await source(), depth + 1);\n }\n\n if (typeof source === \"string\") {\n return source;\n }\n if (Array.isArray(source)) {\n return source;\n }\n if (source instanceof Uint8Array) {\n return new TextDecoder().decode(source);\n }\n if (source instanceof ArrayBuffer) {\n return new TextDecoder().decode(new Uint8Array(source));\n }\n if (typeof ReadableStream !== \"undefined\" && source instanceof ReadableStream) {\n return readStream(source);\n }\n if (Symbol.asyncIterator in source) {\n return readAsyncIterable(source);\n }\n if (\"file_path\" in source) {\n return readFilePath(source.file_path);\n }\n if (\"url\" in source) {\n return readUrl(source);\n }\n\n throw new Error(`Unsupported playback source: ${Object.prototype.toString.call(source)}`);\n}\n\n/**\n * Drain a `ReadableStream` into a string. Read through a reader rather than `for await`: async\n * iteration over a `ReadableStream` is still not universal in browsers.\n */\nasync function readStream(stream: ReadableStream): Promise {\n const reader = stream.getReader();\n const decoder = new TextDecoder();\n let content = \"\";\n try {\n for (;;) {\n const { done, value } = await reader.read();\n if (done) {\n break;\n }\n content += typeof value === \"string\" ? value : decoder.decode(value, { stream: true });\n }\n } finally {\n reader.releaseLock();\n }\n return content + decoder.decode();\n}\n\n/**\n * Drain an async iterable of chunks into a string.\n */\nasync function readAsyncIterable(iterable: AsyncIterable): Promise {\n const decoder = new TextDecoder();\n let content = \"\";\n for await (const chunk of iterable) {\n content += typeof chunk === \"string\" ? chunk : decoder.decode(chunk, { stream: true });\n }\n return content + decoder.decode();\n}\n\n/**\n * Read a recording off the local file system. The only Node.js-only source form.\n */\nasync function readFilePath(file_path: string): Promise {\n if (!file_path) {\n throw new Error(\"file_path is required in a { file_path } playback source\");\n }\n // The specifier is assembled at runtime so a bundler cannot statically analyse it. Spelled\n // literally, `import(\"node:fs/promises\")` is a hard resolve error for any browser-targeted\n // esbuild consumer of this package (Vite only warns), even though nothing they ship ever\n // reaches this Node-only source form. The type-position import below is erased at compile\n // time, so the module stays fully typed.\n const node_fs_promises = \"node:fs\" + \"/promises\";\n const { readFile } = (await import(/* @vite-ignore */ node_fs_promises)) as typeof import(\"node:fs/promises\");\n return readFile(file_path, \"utf8\");\n}\n\n/**\n * Fetch a recording. A failed request throws rather than replaying the error page as a recording.\n */\nasync function readUrl({ url, init }: { url: string; init?: RequestInit }): Promise {\n const response = await fetch(url, init);\n if (!response.ok) {\n throw new Error(`Failed to fetch playback source \"${url}\": ${response.status} ${response.statusText}`);\n }\n return response.text();\n}\n\n/**\n * The `timestamp` field of a recorded payload, if it has one.\n */\nfunction readTimestamp(payload: unknown): unknown {\n if (payload === null || typeof payload !== \"object\") {\n return undefined;\n }\n return (payload as { timestamp?: unknown }).timestamp;\n}\n\n/**\n * A recorded timestamp as epoch milliseconds, or null if absent or invalid.\n */\nfunction parseTimestamp(timestamp: unknown): number | null {\n if (typeof timestamp !== \"string\" && typeof timestamp !== \"number\") {\n return null;\n }\n const date = new Date(timestamp);\n return isNaN(date.getTime()) ? null : date.getTime();\n}\n", "//------------------------------------------------------------------------------\nimport type { IClientOptions, MqttClient } from \"mqtt\";\n\n//------------------------------------------------------------------------------\nimport type { EventSink, Transport } from \"../Transport\";\n\n/**\n * The shape of the lazily imported `mqtt` module, which differs between the CJS build Node\n * resolves and the ESM build a browser bundler resolves \u2014 see {@link MqttTransport.start}.\n */\ntype MqttModule = {\n connect?: typeof import(\"mqtt\").connect;\n default?: { connect: typeof import(\"mqtt\").connect };\n};\n\n/**\n * MQTT 5 DISCONNECT reason code for \"Session taken over\": another client connected with the same\n * client id, and the broker gave it the session (MQTT 5.0 \u00A73.14.2.1).\n */\nconst SESSION_TAKEN_OVER = 0x8e;\n\n/**\n * How many closes-without-error inside {@link SILENT_CLOSE_WINDOW_MS} are read as a session\n * takeover on MQTT 3.1.1, which has no packet to say so. Three: one is a network blip, two can be\n * a broker restart, three with the client reconnecting in between is another client on the same id.\n */\nconst SILENT_CLOSE_BURST = 3;\n\n/**\n * The window over which silent closes are counted, in milliseconds.\n */\nconst SILENT_CLOSE_WINDOW_MS = 30_000;\n\n/**\n * Configuration of an {@link MqttTransport}.\n *\n * @inline\n * @category Data\n */\nexport type MqttTransportConfig = {\n /**\n * URL of the MQTT broker, e.g. `mqtt://user:pass@broker.example.com:1883`.\n *\n * Optional when `options` fully describes the connection (e.g. via its `host`/`port` or\n * `servers` fields), matching the underlying `mqtt` module's own `connect(options)` overload.\n */\n broker_url?: string;\n\n /**\n * MQTT client options passed through to the underlying `mqtt` module's `connect()`.\n */\n options?: IClientOptions;\n\n /**\n * Topics to subscribe to. MQTT wildcards (`+`, `#`) are supported.\n */\n topics?: Array;\n};\n\n/**\n * Transport that subscribes to an MQTT broker and forwards each JSON message as an event **on its\n * topic** \u2014 the one bundled transport whose channel is a genuine routing key, so mappings can\n * select on it with a `channel` pattern.\n *\n * The QoS and retain flag travel along in the event's `metadata`.\n *\n * Requires the optional dependency `mqtt` (loaded lazily on {@link MqttTransport.start}).\n *\n * @category Data\n */\nexport class MqttTransport implements Transport {\n /**\n * The transport configuration.\n */\n readonly #config: MqttTransportConfig;\n\n /**\n * The sink to push events into.\n */\n readonly #sink: EventSink;\n\n /**\n * The MQTT client instance, or null if not connected.\n */\n #client: MqttClient | null = null;\n\n /**\n * Whether an `error` was reported since the last successful connect. A `close` that no error\n * preceded is the broker \u2014 or the network \u2014 closing the socket, which is worth saying: the\n * `mqtt` module reports every teardown it initiates itself (keepalive or connack timeout) as an\n * error first, so a silent close never comes from this side.\n */\n #errored_since_connect = false;\n\n /**\n * How many reconnects the client has attempted since `start()`, so a reconnect loop can be\n * counted from the log.\n */\n #reconnect_count = 0;\n\n /**\n * When the broker closed the socket without any error having been reported, most recent last,\n * pruned to {@link SILENT_CLOSE_WINDOW_MS}. Several of these in a short window is the MQTT\n * 3.1.1 face of a session takeover \u2014 another client connecting with this one's `clientId` \u2014\n * which is the one thing a broker enforces that the module cannot check up front.\n */\n #silent_closes: Array = [];\n\n /**\n * Whether the takeover warning has been printed since `start()`; it is printed once.\n */\n #takeover_warned = false;\n\n /**\n *\n */\n constructor(config: MqttTransportConfig, sink: EventSink) {\n this.#config = config;\n this.#sink = sink;\n }\n\n /**\n * Connect to the broker and subscribe to the configured topics.\n */\n async start(): Promise {\n const url = this.#config.broker_url;\n const options = this.#config.options;\n if (!url && !options) {\n throw new Error(\"MQTT transport config requires broker_url and/or options\");\n }\n\n let mqtt_module: MqttModule;\n try {\n mqtt_module = (await import(\"mqtt\")) as unknown as MqttModule;\n } catch {\n throw new Error(\n 'The MQTT transport requires the optional dependency \"mqtt\". Install it with `npm install mqtt`.',\n );\n }\n\n // `mqtt` resolves to a different build per runtime: Node gets the CJS one, whose named\n // exports interop exposes `connect` directly, while a bundler targeting the browser gets\n // `dist/mqtt.esm.js`, whose *only* export is the default one. The package types declare\n // both, so reading `connect` off the namespace type-checks and is undefined in a page.\n const connect = mqtt_module.connect ?? mqtt_module.default?.connect;\n if (!connect) {\n throw new Error('The optional dependency \"mqtt\" resolved to a module without a `connect` export.');\n }\n\n // A copy, never the config's own object: `mqtt` keeps the object it is given as the\n // client's live options and writes the `clientId` it generates into it. Handed through as\n // is, the config would come back carrying this client's id, and anything else connecting\n // from the same config \u2014 a second transport, a caller's own client \u2014 would connect *as*\n // this client and take its session over.\n const connect_options = { ...options };\n this.#client = url ? connect(url, connect_options) : connect(connect_options);\n if (url) {\n console.log(\n `[mqtt-transport] Connecting to MQTT broker at ${url.replace(/\\/\\/([^@]+)@/, \"//@\")}...`,\n );\n } else {\n console.log(\"[mqtt-transport] Connecting to MQTT broker via options...\");\n }\n\n this.#errored_since_connect = false;\n this.#reconnect_count = 0;\n this.#silent_closes = [];\n this.#takeover_warned = false;\n\n this.#client.on(\"connect\", () => {\n console.log(`[mqtt-transport] Connected as ${this.#clientId()}`);\n this.#errored_since_connect = false;\n for (const topic of this.#config.topics ?? []) {\n this.#client!.subscribe(topic);\n }\n });\n this.#client.on(\"message\", (topic: string, payload: Buffer, packet?: { qos?: number; retain?: boolean }) => {\n void this.#handleMessage(topic, payload.toString(), packet);\n });\n\n this.#client.on(\"error\", err => {\n this.#errored_since_connect = true;\n console.error(\"========================================\");\n console.error(\"[mqtt-transport] >>> ERROR\");\n console.error(\"========================================\");\n console.error(\"Message:\", err.message);\n console.error(\"Cause:\", err.cause);\n console.error(\"Name:\", err.name);\n console.error(\"Stack:\");\n console.error(err.stack);\n });\n\n // An MQTT 5 broker says why it is dropping a client in a DISCONNECT packet; on MQTT 3.1.1\n // it can only close the socket, and this never fires.\n this.#client.on(\"disconnect\", packet => {\n const reason = packet.properties?.reasonString;\n console.error(\"========================================\");\n console.error(\"[mqtt-transport] >>> DISCONNECTED BY THE BROKER\");\n console.error(\"========================================\");\n console.error(\"Reason code:\", packet.reasonCode ?? \"(none)\");\n console.error(\"Reason:\", reason ?? \"(none given)\");\n if (packet.reasonCode === SESSION_TAKEN_OVER) {\n console.error(\n `Session taken over: another client connected with this client's id \"${this.#clientId()}\".`,\n );\n }\n });\n\n this.#client.on(\"close\", () => {\n if (this.#errored_since_connect) {\n console.log(\"[mqtt-transport] >>> CONNECTION CLOSED\");\n return;\n }\n console.log(\n \"[mqtt-transport] >>> CONNECTION CLOSED (no error was reported: the broker closed the socket, or the network did)\",\n );\n this.#noteSilentClose();\n });\n\n this.#client.on(\"offline\", () => {\n console.log(\"[mqtt-transport] >>> CLIENT OFFLINE\");\n });\n\n this.#client.on(\"end\", () => {\n console.log(\"[mqtt-transport] >>> CLIENT END\");\n });\n\n this.#client.on(\"reconnect\", () => {\n this.#reconnect_count++;\n console.log(`[mqtt-transport] >>> RECONNECTING (attempt ${this.#reconnect_count} since start)`);\n });\n }\n\n /**\n * The id this client presents to the broker \u2014 the one `mqtt` generated when the config carried\n * none \u2014 or `\"?\"` before there is a client.\n */\n #clientId(): string {\n const client_id = (this.#client?.options as { clientId?: unknown } | undefined)?.clientId;\n return typeof client_id === \"string\" ? client_id : \"?\";\n }\n\n /**\n * Records one silent close and, once, warns when they come in a burst. A broker that takes a\n * session over says so in a DISCONNECT packet on MQTT 5, but on 3.1.1 it can only drop the\n * socket, and a client dropped without error several times in a row while it keeps\n * reconnecting is that, far more often than a flaky network.\n */\n #noteSilentClose(): void {\n const now = Date.now();\n this.#silent_closes.push(now);\n this.#silent_closes = this.#silent_closes.filter(at => now - at <= SILENT_CLOSE_WINDOW_MS);\n if (this.#takeover_warned || this.#silent_closes.length < SILENT_CLOSE_BURST) {\n return;\n }\n this.#takeover_warned = true;\n const span_s = Math.round((now - this.#silent_closes[0]) / 1000);\n console.warn(\n `[mqtt-transport] >>> closed by the broker ${this.#silent_closes.length} times in ${span_s} s with no error ` +\n `reported. Most likely another client is connecting with the same clientId \"${this.#clientId()}\" ` +\n `and the broker is handing the session back and forth (session takeover).`,\n );\n }\n\n /**\n * Disconnect from the broker.\n */\n async stop(): Promise {\n if (this.#client) {\n this.#client.end();\n this.#client = null;\n }\n }\n\n /**\n * Handle a message received from the broker by parsing it as JSON and pushing it to the sink,\n * on its topic.\n *\n * @param topic The topic the message was received on.\n * @param payload The message payload as a string.\n * @param packet The MQTT packet, whose QoS and retain flag travel in the event's metadata.\n */\n async #handleMessage(topic: string, payload: string, packet?: { qos?: number; retain?: boolean }): Promise {\n let message: unknown;\n try {\n message = JSON.parse(payload);\n } catch {\n console.warn(`[mqtt-transport] Invalid JSON on topic ${topic}`);\n return;\n }\n\n try {\n await this.#sink.ingest({\n channel: topic,\n payload: message,\n received_at: new Date(),\n metadata: { transport: \"mqtt\", qos: packet?.qos, retain: packet?.retain },\n });\n } catch (error) {\n console.error(`[mqtt-transport] Sink failed:`, error);\n }\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { EventHubConsumerClient, EventPosition, Subscription } from \"@azure/event-hubs\";\n\n//------------------------------------------------------------------------------\nimport type { EventSink, Transport } from \"../Transport\";\n\n/**\n * Minimal structural view of the `@azure/event-hubs` module, avoiding a hard type dependency on\n * its dual (ESM/CJS) type declarations.\n *\n * @internal\n */\ntype EventHubsModule = {\n EventHubConsumerClient: typeof EventHubConsumerClient;\n latestEventPosition: EventPosition;\n};\n\n/**\n * Configuration of an {@link AzureEventHubTransport}.\n *\n * @inline\n * @category Data\n */\nexport type AzureEventHubTransportConfig = {\n /**\n * Azure Event Hubs connection string. Publishers that expose an Event Hubs-compatible\n * endpoint (e.g. a Microsoft Fabric Eventstream \"custom endpoint\") provide one too; it\n * usually embeds an `EntityPath=` segment, e.g.:\n * Endpoint=sb://xxxx.servicebus.windows.net/;SharedAccessKeyName=key_xxxx;SharedAccessKey=xxxx;EntityPath=xxxx\n */\n connection_string: string;\n\n /**\n * Consumer group to read with. Defaults to the Event Hubs default consumer group (`\"$Default\"`).\n */\n consumer_group?: string;\n\n /**\n * Event hub (entity) name. Only needed when the connection string does NOT embed `EntityPath=`.\n */\n event_hub_name?: string;\n};\n\n/**\n * Transport that subscribes to an Azure Event Hub, under the `\"azure-event-hub\"` kind.\n *\n * Any publisher speaking the Event Hubs protocol works, including Microsoft Fabric \"Real-Time\n * Intelligence\" Eventstreams via their Event Hubs-compatible custom endpoint.\n *\n * **Channel caveat.** Event Hubs has no per-message routing key, so events are emitted on their\n * partition id \u2014 a load-balancing artifact, not a topic: the same logical device can land on\n * different partitions, and the assignment can change. Never write a mapping that selects on\n * `channel` against this transport; select on the payload with `when` instead. The partition id,\n * offset and sequence number are all available in the event's `metadata` for diagnostics.\n *\n * Requires the optional dependency `@azure/event-hubs` (loaded lazily on\n * {@link AzureEventHubTransport.start}).\n *\n * This transport reads from the latest position and does NOT checkpoint. A production deployment\n * that must not miss events across restarts should extend it with a `CheckpointStore` (e.g.\n * `@azure/eventhubs-checkpointstore-blob`) and start from the stored offsets \u2014 the\n * `sequence_number` / `offset` carried in each event's metadata are what such a store records.\n *\n * @category Data\n */\nexport class AzureEventHubTransport implements Transport {\n /**\n * The transport configuration.\n */\n readonly #config: AzureEventHubTransportConfig;\n\n /**\n * The sink to push events into.\n */\n readonly #sink: EventSink;\n\n /**\n * The Event Hub client instance, or null if not connected.\n */\n #client: EventHubConsumerClient | null = null;\n\n /**\n * The subscription to the Event Hub, or null if not subscribed.\n */\n #subscription: Subscription | null = null;\n\n /**\n *\n */\n constructor(config: AzureEventHubTransportConfig, sink: EventSink) {\n this.#config = config;\n this.#sink = sink;\n }\n\n /**\n * Connect to the event hub and start receiving events.\n */\n async start(): Promise {\n const connection_string = this.#config.connection_string;\n if (!connection_string) {\n throw new Error(\"Event Hub connection_string is required in transport config\");\n }\n\n let event_hubs: EventHubsModule;\n try {\n event_hubs = (await import(\"@azure/event-hubs\")) as unknown as EventHubsModule;\n } catch {\n throw new Error(\n 'The Azure Event Hub transport requires the optional dependency \"@azure/event-hubs\". ' +\n \"Install it with `npm install @azure/event-hubs`.\",\n );\n }\n\n const consumer_group =\n this.#config.consumer_group || event_hubs.EventHubConsumerClient.defaultConsumerGroupName;\n\n // Most connection strings embed `EntityPath=`, so the 2-arg form is the common case. Only\n // when a separate event_hub_name is supplied (string lacks EntityPath) do we fall back to\n // the 3-arg form.\n const has_entity_path = /;EntityPath=/i.test(connection_string);\n if (this.#config.event_hub_name && !has_entity_path) {\n this.#client = new event_hubs.EventHubConsumerClient(\n consumer_group,\n connection_string,\n this.#config.event_hub_name,\n );\n } else {\n this.#client = new event_hubs.EventHubConsumerClient(consumer_group, connection_string);\n }\n\n const endpoint_for_log = connection_string.replace(/SharedAccessKey=[^;]+/i, \"SharedAccessKey=\");\n console.log(`[azure-event-hub-transport] Subscribing to Event Hub (${endpoint_for_log})...`);\n\n this.#subscription = this.#client.subscribe(\n {\n processEvents: async (events, context) => {\n for (const event of events) {\n await this.#handleEvent(context.partitionId, event);\n }\n },\n processError: async (error, context) => {\n console.error(`[azure-event-hub-transport] Error on partition ${context.partitionId}:`, error);\n },\n },\n // Read only events that arrive after we connect.\n { startPosition: event_hubs.latestEventPosition },\n );\n }\n\n /**\n * Stop receiving events and close the connection.\n */\n async stop(): Promise {\n try {\n await this.#subscription?.close();\n } finally {\n this.#subscription = null;\n await this.#client?.close();\n this.#client = null;\n }\n }\n\n /**\n * Push an event received from the Event Hub into the sink, on its partition id, carrying the\n * broker's own timestamp and position in its metadata.\n *\n * @param partition_id The partition id the event was received from.\n * @param received The received event, whose body is already deserialized by the Event Hubs SDK.\n */\n async #handleEvent(\n partition_id: string,\n received: { body: unknown; enqueuedTimeUtc?: Date; offset?: string | number; sequenceNumber?: number },\n ): Promise {\n // Event Hubs delivers the event body already deserialized (JSON \u2192 object). Guard against\n // non-object bodies (e.g. raw strings) so the pipeline gets a stable shape.\n if (received.body === null || typeof received.body !== \"object\") {\n console.warn(`[azure-event-hub-transport] Skipping non-object event body on partition ${partition_id}`);\n return;\n }\n\n try {\n await this.#sink.ingest({\n // A partition id, NOT a topic \u2014 see the class doc. Mappings select on the payload.\n channel: partition_id,\n payload: received.body,\n received_at: new Date(),\n ...(received.enqueuedTimeUtc ? { source_timestamp: received.enqueuedTimeUtc } : {}),\n metadata: {\n transport: \"azure-event-hub\",\n partition_id,\n offset: received.offset,\n sequence_number: received.sequenceNumber,\n },\n });\n } catch (error) {\n console.error(`[azure-event-hub-transport] Sink failed:`, error);\n }\n }\n}\n", "//------------------------------------------------------------------------------\n// Everything the OPC UA transport needs to know about `node-opcua-client`.\n//\n// That package stays an **optional peer** for consumers \u2014 `opc.tcp://` is raw TCP, so the transport\n// is Node-only and most consumers never install it, which is why {@link OpcUaTransport.start} reaches\n// it through a lazy `import()` and esbuild keeps it `external`. But it *is* a devDependency here, so\n// the types below are the real ones and a signature change upstream fails the build rather than a\n// PLC connection. (Every type in this file is `@internal`, so `stripInternal` deletes it from the\n// emitted `.d.ts`: a consumer who installs no such peer never sees a reference to it.)\n//\n// The file has two halves:\n//\n// - **Specification constants.** Attribute ids, data types, security modes, status severities.\n// These travel on the wire and are fixed by the OPC UA specification (Parts 4 and 6), so\n// hard-coding them cannot drift: node-opcua's enums merely spell them out. `AttributeIds.Value`\n// has been `13` since 2006 and will stay `13`. They are kept spelled out because they read more\n// cheaply than the enum lookups they replace.\n// - **The module types**, derived from the real module rather than restated \u2014 the instance types\n// come back out of the three `create` calls, so there is no hand-maintained shape left to drift.\n//\n// The two payload projections ({@link OpcUaVariant}, {@link OpcUaDataValue}) are the deliberate\n// exception: they name only the fields the decoder reads, so a sample can be written as a plain\n// object literal in a test instead of a fully constructed `DataValue`. `opcua-transport.test.ts`\n// pins them against the real `DataValue` / `Variant` with type-level assertions, so narrowing them\n// costs no drift detection.\n\n//------------------------------------------------------------------------------\n// Specification constants.\n\n/**\n * `AttributeIds.Value`, the only attribute the transport monitors.\n */\nexport const ATTRIBUTE_ID_VALUE = 13;\n\n/**\n * `TimestampsToReturn.Both`: the source clock is the one worth carrying, the server clock is the\n * fallback when a server does not keep one.\n */\nexport const TIMESTAMPS_TO_RETURN_BOTH = 2;\n\n/**\n * `UserTokenType.UserName`, used when the config carries credentials.\n */\nexport const USER_TOKEN_TYPE_USER_NAME = 1;\n\n/**\n * `VariantArrayType.Scalar`.\n */\nexport const VARIANT_ARRAY_TYPE_SCALAR = 0;\n\n/**\n * `DataType.Int64` and `DataType.UInt64` \u2014 the two types node-opcua hands over as a `[high, low]`\n * pair rather than a number.\n */\nexport const DATA_TYPE_INT64 = 8;\nexport const DATA_TYPE_UINT64 = 9;\n\n/**\n * Severity lives in the top two bits of a status code: `0` is Good, `1` is Uncertain, anything above\n * is Bad. This is what node-opcua's `StatusCode.isGood()` / `isUncertain()` read.\n */\nexport const STATUS_SEVERITY_UNCERTAIN = 1;\n\n/**\n * `MessageSecurityMode`, by name. The names are also the transport's config vocabulary, so this map\n * doubles as the validator for `security_mode`.\n */\nexport const MESSAGE_SECURITY_MODES: Record = { None: 1, Sign: 2, SignAndEncrypt: 3 };\n\n/**\n * The security policy short names defined by the specification, and the namespace that turns one\n * into the policy URI the client expects \u2014 which is exactly what the values of node-opcua's\n * `SecurityPolicy` enum are.\n */\nexport const SECURITY_POLICIES = [\n \"None\",\n \"Basic128Rsa15\",\n \"Basic256\",\n \"Basic256Sha256\",\n \"Aes128_Sha256_RsaOaep\",\n \"Aes256_Sha256_RsaPss\",\n];\nexport const SECURITY_POLICY_URI_PREFIX = \"http://opcfoundation.org/UA/SecurityPolicy#\";\n\n//------------------------------------------------------------------------------\n// The module types.\n//\n// `import type` is erased at compile time, so naming these costs no runtime import: the transport\n// still reaches the module only through the lazy `import()` in `start()`, and esbuild still keeps\n// the package `external`. Aliases rather than derivations through the methods that produce them \u2014\n// `createSession` is overloaded three ways, and `Parameters<>` / `ReturnType<>` resolve against the\n// last overload (the callback form), which yields the callback type and `void` instead of an\n// identity and a session.\n\nimport type {\n ClientMonitoredItem,\n ClientSession,\n ClientSubscription,\n OPCUAClient,\n UserIdentityInfo,\n} from \"node-opcua-client\";\n\n/**\n * The `node-opcua-client` module, as the lazy `import()` in {@link OpcUaTransport.start} hands it\n * over. Naming the real module is what makes the calls the transport makes checked against the\n * upstream signatures.\n *\n * @internal\n */\nexport type OpcUaClientModule = typeof import(\"node-opcua-client\");\n\n/**\n * The identity a session is opened with. Omitted = anonymous.\n *\n * @internal\n */\nexport type OpcUaUserIdentity = UserIdentityInfo;\n\n/**\n * Produced by `OPCUAClient.create`.\n *\n * @internal\n */\nexport type OpcUaClient = OPCUAClient;\n\n/**\n * Produced by {@link OpcUaClient.createSession}.\n *\n * @internal\n */\nexport type OpcUaSession = ClientSession;\n\n/**\n * Produced by `ClientSubscription.create`. Carries `publishingInterval`, the interval the server\n * **revised** the request to \u2014 the only one that describes how the subscription actually behaves,\n * readable from `\"started\"` on.\n *\n * @internal\n */\nexport type OpcUaSubscription = ClientSubscription;\n\n/**\n * Produced by `ClientMonitoredItem.create`. Carries `result`, the `MonitoredItemCreateResult` the\n * server answered with \u2014 readable from `\"initialized\"` on, which is what tells you the revised\n * sampling interval and queue size.\n *\n * @internal\n */\nexport type OpcUaMonitoredItem = ClientMonitoredItem;\n\n//------------------------------------------------------------------------------\n// Payload projections.\n//\n// These two name only the fields {@link decodeOpcUaVariant} and the sample handler read, rather than\n// aliasing node-opcua's `Variant` / `DataValue` classes. That keeps a test sample a plain object\n// literal instead of a fully constructed `DataValue` \u2014 worth it for a decoder that is pure\n// projection. `opcua-transport.test.ts` asserts at type level that the real classes are assignable\n// to both, so narrowing them here still cannot drift away from what arrives at runtime.\n\n/**\n * A variant, as node-opcua delivers it: the decoded value plus what is needed to know how to read it\n * back.\n *\n * @internal\n */\nexport type OpcUaVariant = {\n value?: unknown;\n dataType?: number;\n arrayType?: number;\n};\n\n/**\n * A data value, as node-opcua delivers it to a monitored item's `changed` listener.\n *\n * @internal\n */\nexport type OpcUaDataValue = {\n value?: OpcUaVariant | null;\n statusCode?: { value?: number; name?: string } | null;\n sourceTimestamp?: Date | null;\n serverTimestamp?: Date | null;\n};\n", "//------------------------------------------------------------------------------\nimport type { EventSink, Transport } from \"../Transport\";\n// `node-opcua-client` is an optional peer this repository does not install; everything the transport\n// knows about it is declared there rather than imported from it.\nimport {\n ATTRIBUTE_ID_VALUE,\n DATA_TYPE_INT64,\n DATA_TYPE_UINT64,\n MESSAGE_SECURITY_MODES,\n SECURITY_POLICIES,\n SECURITY_POLICY_URI_PREFIX,\n STATUS_SEVERITY_UNCERTAIN,\n TIMESTAMPS_TO_RETURN_BOTH,\n USER_TOKEN_TYPE_USER_NAME,\n VARIANT_ARRAY_TYPE_SCALAR,\n type OpcUaClient,\n type OpcUaClientModule,\n type OpcUaDataValue,\n type OpcUaSession,\n type OpcUaSubscription,\n type OpcUaUserIdentity,\n type OpcUaVariant,\n} from \"./OpcUaClientModule\";\n\n/**\n * One OPC UA variable to monitor, and the channel its samples are published on.\n *\n * @category Data\n */\nexport type OpcUaNodeSpec = {\n /**\n * Identifier of the node to monitor, e.g. `ns=3;s=\"DB_Line1\".\"Temperature\"` on a Siemens PLC or\n * `ns=2;i=1042` on a server using numeric identifiers.\n */\n node_id: string;\n\n /**\n * Channel the samples of this node are published on. Defaults to {@link OpcUaNodeSpec.node_id}.\n *\n * Worth setting: channel patterns match over `/`-separated segments, and a raw node id is a\n * single opaque segment full of `;`, `=` and quotes. Aliasing `ns=3;s=\"DB1\".\"Temp\"` to\n * `plc/line1/temperature` is what lets a mapping select it with `channel: \"plc/+/temperature\"`.\n */\n channel?: string;\n\n /**\n * How often the server samples this node, in milliseconds. Overrides\n * {@link OpcUaTransportConfig.sampling_interval} for this node alone \u2014 the one knob worth\n * setting per node, a fast counter and a slow temperature rarely deserving the same rate.\n */\n sampling_interval?: number;\n};\n\n/**\n * Configuration of an {@link OpcUaTransport}.\n *\n * @inline\n * @category Data\n */\nexport type OpcUaTransportConfig = {\n /**\n * Endpoint of the OPC UA server, e.g. `opc.tcp://plc.example.com:4840`.\n */\n endpoint_url: string;\n\n /**\n * Nodes to monitor. A bare string is a node id whose channel is that same node id; use the\n * {@link OpcUaNodeSpec} form to alias it to a readable channel.\n */\n nodes: Array;\n\n /**\n * How often the server publishes the samples it has collected, in milliseconds. Defaults to\n * `1000`. This is the latency floor of the whole ingestion: sampling faster than this only\n * fills the queue.\n *\n * This is a *request*: the server answers with the interval it will actually publish at, and\n * that is the one that holds. Most servers refuse to go below **50 ms** \u2014 node-opcua's own server\n * clamps there, and caps at one minute \u2014 so asking for less buys nothing. A request the server\n * revises upward is logged once rather than absorbed silently, since everything downstream of a\n * halved sample rate looks like a bug elsewhere.\n */\n publishing_interval?: number;\n\n /**\n * How often the server samples the monitored nodes, in milliseconds. Defaults to\n * {@link OpcUaTransportConfig.publishing_interval}, i.e. one sample per publication.\n *\n * Revised by the server the same way the publishing interval is, and logged the same way: a node\n * whose underlying device cannot be read faster comes back with its own minimum, whatever this\n * asks for.\n */\n sampling_interval?: number;\n\n /**\n * How many samples the server buffers per node between two publications. Defaults to `1`, which\n * keeps only the latest \u2014 the right choice for telemetry driving a scene. Raise it to receive\n * every sample of a node sampled faster than it is published.\n */\n queue_size?: number;\n\n /**\n * Message security to negotiate. Defaults to `\"None\"`, or to `\"SignAndEncrypt\"` when a\n * {@link OpcUaTransportConfig.security_policy} other than `\"None\"` is named.\n */\n security_mode?: \"None\" | \"Sign\" | \"SignAndEncrypt\";\n\n /**\n * Security policy to negotiate, by short name (`\"Basic256Sha256\"`,\n * `\"Aes128_Sha256_RsaOaep\"`, ...) or by full policy URI. Defaults to `\"None\"`, or to\n * `\"Basic256Sha256\"` when a {@link OpcUaTransportConfig.security_mode} other than `\"None\"` is\n * named. The two must agree: either both are `\"None\"`, or neither is.\n */\n security_policy?: string;\n\n /**\n * User name to authenticate with. Omitted = connect anonymously.\n */\n username?: string;\n\n /**\n * Password that goes with {@link OpcUaTransportConfig.username}.\n */\n password?: string;\n\n /**\n * Application name announced to the server, and carried by the client certificate generated for\n * a secured connection. Defaults to `\"livelink-agent\"`.\n */\n application_name?: string;\n\n /**\n * How many times to retry the connection before giving up. Defaults to `3`.\n *\n * Deliberately bounded: sources are started sequentially and awaited, so a transport retrying\n * forever would hang the whole ingestion rather than report. A failed start surfaces on\n * `on-error` and is retried by the next session to bind, which is the loop that actually\n * survives a PLC being down at boot. The same budget governs the automatic reconnection after\n * an established connection drops.\n */\n max_retry?: number;\n};\n\n//------------------------------------------------------------------------------\n/**\n * Defaults for the subscription's pace.\n */\nconst DEFAULT_PUBLISHING_INTERVAL = 1_000;\nconst DEFAULT_QUEUE_SIZE = 1;\nconst DEFAULT_MAX_RETRY = 3;\n\n/**\n * How much slower than requested a revised interval has to be before it is worth reporting. Revised\n * values come back as floats, and a server rounding a request to its own timer granularity is not\n * what this is here to catch.\n */\nconst INTERVAL_REVISION_EPSILON_MS = 0.5;\n\n//------------------------------------------------------------------------------\n/**\n * Turn a variant into something a component patch can hold: a number, a string, a boolean, a `Date`\n * or an array of those.\n *\n * Two shapes need help. Numeric arrays arrive as typed arrays, which are not what a component\n * expects to be handed. And 64-bit integers arrive as a `[high, low]` pair of 32-bit halves \u2014\n * writing that straight into a component would silently store a two-element array where a Siemens\n * `LInt` was meant, so the halves are recombined here. Beyond 2^53 the result is rounded, which is\n * the price of staying a `number`.\n *\n * Returns `undefined` when the variant carries no value at all \u2014 OPC UA has no such value, so the\n * caller can read it as \"nothing to publish\".\n *\n * @internal\n */\nexport function decodeOpcUaVariant(variant: OpcUaVariant | null | undefined): unknown {\n const value = variant?.value;\n if (value === undefined || value === null) {\n return undefined;\n }\n\n if (variant?.dataType === DATA_TYPE_INT64 || variant?.dataType === DATA_TYPE_UINT64) {\n const is_scalar = variant.arrayType === undefined || variant.arrayType === VARIANT_ARRAY_TYPE_SCALAR;\n return is_scalar ? decode64BitInteger(value) : toArray(value).map(decode64BitInteger);\n }\n\n if (ArrayBuffer.isView(value) && !(value instanceof DataView)) {\n return Array.from(value as unknown as ArrayLike);\n }\n\n return value;\n}\n\n/**\n * Recombine the `[high, low]` pair node-opcua uses for a 64-bit integer. `BigInt` bitwise operators\n * work in two's complement, so a negative high half yields the negative `Int64` it encodes.\n */\nfunction decode64BitInteger(value: unknown): unknown {\n if (typeof value === \"bigint\") {\n return Number(value);\n }\n if (Array.isArray(value) && value.length === 2 && typeof value[0] === \"number\" && typeof value[1] === \"number\") {\n return Number((BigInt(value[0]) << 32n) | BigInt(value[1] >>> 0));\n }\n return value;\n}\n\n/**\n * Read a variant's array value as an array, whatever container it came in.\n */\nfunction toArray(value: unknown): Array {\n return Array.isArray(value) ? value : Array.from(value as ArrayLike);\n}\n\n/**\n * Expand the node list into full specs, so the constructor is where a config mistake is reported\n * rather than the first sample that never arrives.\n */\nfunction normalizeNodes(nodes: Array | undefined): Array {\n if (!Array.isArray(nodes) || nodes.length === 0) {\n throw new Error(\"At least one node is required in the OPC UA transport config\");\n }\n return nodes.map(node => {\n const spec = typeof node === \"string\" ? { node_id: node } : node;\n if (!spec?.node_id) {\n throw new Error(`Every OPC UA node needs a node_id, got ${JSON.stringify(node)}`);\n }\n return spec;\n });\n}\n\n/**\n * Resolve the security mode and policy to what the client expects, each defaulting from the other:\n * naming a policy means security is wanted, and asking for `Sign` or `SignAndEncrypt` without a\n * policy means the modern default.\n */\nfunction resolveSecurity(config: OpcUaTransportConfig): { mode: number; policy: string } {\n const wants_security = config.security_policy !== undefined && config.security_policy !== \"None\";\n const mode_name = config.security_mode ?? (wants_security ? \"SignAndEncrypt\" : \"None\");\n const policy_name = config.security_policy ?? (mode_name === \"None\" ? \"None\" : \"Basic256Sha256\");\n\n const mode = MESSAGE_SECURITY_MODES[mode_name];\n if (mode === undefined) {\n throw new Error(\n `Unknown OPC UA security_mode \"${mode_name}\". Expected one of: ${Object.keys(MESSAGE_SECURITY_MODES).join(\", \")}.`,\n );\n }\n\n // A full policy URI passes through, so a policy published after this SDK can still be named.\n const is_uri = policy_name.startsWith(\"http\");\n if (!is_uri && !SECURITY_POLICIES.includes(policy_name)) {\n throw new Error(\n `Unknown OPC UA security_policy \"${policy_name}\". Expected one of: ${SECURITY_POLICIES.join(\", \")}, or a full policy URI.`,\n );\n }\n\n if ((mode_name === \"None\") !== (policy_name === \"None\")) {\n throw new Error(\n `OPC UA security_mode \"${mode_name}\" and security_policy \"${policy_name}\" disagree: either both are \"None\", or neither is.`,\n );\n }\n\n return { mode, policy: is_uri ? policy_name : `${SECURITY_POLICY_URI_PREFIX}${policy_name}` };\n}\n\n/**\n * Run a teardown step, reporting rather than throwing: a session that already died under us must\n * not stop the socket below it from being closed.\n */\nasync function closeQuietly(action: () => Promise | undefined): Promise {\n try {\n await action();\n } catch (error) {\n console.warn(`[opcua-transport] Error while closing:`, error);\n }\n}\n\n//------------------------------------------------------------------------------\n/**\n * Transport that subscribes to variables on an OPC UA server over `opc.tcp://` and forwards each\n * value change as an event **on the node's channel** \u2014 the node id, or the readable alias given in\n * its {@link OpcUaNodeSpec}. Like MQTT and unlike Event Hubs, that channel is a genuine routing key\n * a mapping can select on.\n *\n * This is the classic client/server profile, which is what a PLC whose firmware predates PubSub\n * exposes. **If the plant already bridges OPC UA to MQTT** \u2014 via OPC UA PubSub over MQTT, Telegraf's\n * `inputs.opcua`, Kepware, Ignition \u2014 point the `mqtt` transport at that broker instead: one hop\n * fewer, and no OPC UA client to keep alive next to the scene.\n *\n * Each event's payload is `{ node_id, value, status }` and its `source_timestamp` is the server's\n * own clock. Samples whose status is Bad carry no meaningful value and are dropped, logging once per\n * node rather than at every publication.\n *\n * Requires the optional dependency `node-opcua-client` (loaded lazily on\n * {@link OpcUaTransport.start}). `opc.tcp` is raw TCP, so **this transport is Node.js only** \u2014 in a\n * browser the lazy import is what fails, with the same message as a missing install.\n *\n * A secured connection (`security_mode` other than `\"None\"`) makes node-opcua generate a\n * self-signed client certificate under a `certificates/` folder on first use. The server has to\n * trust it \u2014 on a Siemens PLC, that is a manual step in the web interface, and the failure everyone\n * hits first.\n *\n * @category Data\n */\nexport class OpcUaTransport implements Transport {\n /**\n * The transport configuration.\n */\n readonly #config: OpcUaTransportConfig;\n\n /**\n * The sink to push events into.\n */\n readonly #sink: EventSink;\n\n /**\n * The nodes to monitor, expanded from the config's shorthand.\n */\n readonly #nodes: Array;\n\n /**\n * The security mode and policy to negotiate, resolved from the config.\n */\n readonly #security: { mode: number; policy: string };\n\n /**\n * Nodes already reported as unusable, so an unhealthy one logs once instead of at every\n * publication. Cleared for a node as soon as it publishes a usable sample again, so a later\n * outage is reported anew.\n */\n readonly #warned_nodes = new Set();\n\n /**\n * Interval revisions already reported, keyed by the request they answered rather than by the node\n * that revealed them \u2014 a whole node list revised the same way is one fact, and deserves one line.\n * Cleared with the connection, so the next `start()` reports against the server it finds then.\n */\n readonly #warned_intervals = new Set();\n\n /**\n * The OPC UA client, or null when not connected.\n */\n #client: OpcUaClient | null = null;\n\n /**\n * The session opened on the server, or null when not connected.\n */\n #session: OpcUaSession | null = null;\n\n /**\n * The subscription carrying every monitored item, or null when not subscribed.\n */\n #subscription: OpcUaSubscription | null = null;\n\n /**\n *\n */\n constructor(config: OpcUaTransportConfig, sink: EventSink) {\n if (!config.endpoint_url) {\n throw new Error(\"endpoint_url is required in the OPC UA transport config\");\n }\n this.#nodes = normalizeNodes(config.nodes);\n this.#security = resolveSecurity(config);\n this.#config = config;\n this.#sink = sink;\n }\n\n /**\n * Connect to the server, open a session and subscribe to every configured node.\n */\n async start(): Promise {\n let opcua: OpcUaClientModule;\n try {\n opcua = (await import(\"node-opcua-client\")) as OpcUaClientModule;\n } catch {\n throw new Error(\n 'The OPC UA transport requires the optional dependency \"node-opcua-client\". ' +\n \"Install it with `npm install node-opcua-client`.\",\n );\n }\n\n const endpoint_url = this.#config.endpoint_url;\n const client = opcua.OPCUAClient.create({\n applicationName: this.#config.application_name ?? \"livelink-agent\",\n // Servers routinely advertise their endpoint under a hostname the client cannot resolve\n // \u2014 a PLC on a plant network almost always does. Refusing to connect over that is never\n // what the caller meant by giving us a reachable URL.\n endpointMustExist: false,\n keepSessionAlive: true,\n securityMode: this.#security.mode,\n securityPolicy: this.#security.policy,\n connectionStrategy: {\n initialDelay: 1_000,\n maxDelay: 10_000,\n maxRetry: this.#config.max_retry ?? DEFAULT_MAX_RETRY,\n },\n });\n this.#client = client;\n\n try {\n await this.#subscribe(opcua, client, endpoint_url);\n } catch (error) {\n // Nothing upstream tears down a transport whose `start` rejected, so a connection that\n // came up before the failing step has to be released here.\n await this.stop();\n throw error;\n }\n }\n\n /**\n * Terminate the subscription, close the session and disconnect. Safe when never started, and\n * safe when only part of the connection was ever established.\n */\n async stop(): Promise {\n const subscription = this.#subscription;\n const session = this.#session;\n const client = this.#client;\n this.#subscription = null;\n this.#session = null;\n this.#client = null;\n this.#warned_nodes.clear();\n this.#warned_intervals.clear();\n\n await closeQuietly(() => subscription?.terminate());\n await closeQuietly(() => session?.close());\n await closeQuietly(() => client?.disconnect());\n }\n\n /**\n * Open the session and put every configured node under one subscription.\n *\n * @param opcua The lazily loaded client module.\n * @param client The client to connect with.\n * @param endpoint_url The endpoint to connect to.\n */\n async #subscribe(opcua: OpcUaClientModule, client: OpcUaClient, endpoint_url: string): Promise {\n client.on(\"connection_lost\", () => console.warn(`[opcua-transport] Lost ${endpoint_url}, reconnecting...`));\n client.on(\"connection_reestablished\", () => console.log(`[opcua-transport] Reconnected to ${endpoint_url}`));\n\n console.log(`[opcua-transport] Connecting to ${endpoint_url}...`);\n await client.connect(endpoint_url);\n this.#session = await client.createSession(this.#userIdentity());\n\n const publishing_interval = this.#config.publishing_interval ?? DEFAULT_PUBLISHING_INTERVAL;\n const subscription = opcua.ClientSubscription.create(this.#session, {\n requestedPublishingInterval: publishing_interval,\n // Both counts are in publishing intervals, and the specification wants the lifetime to\n // be at least three keep-alives.\n requestedLifetimeCount: 100,\n requestedMaxKeepAliveCount: 10,\n // 0 = no limit: the cap exists to protect small servers, and throttling it here would\n // only spread one publication of a wide node list over several.\n maxNotificationsPerPublish: 0,\n publishingEnabled: true,\n priority: 10,\n });\n this.#subscription = subscription;\n subscription.on(\"internal_error\", error => console.error(`[opcua-transport] Subscription failed:`, error));\n // The server answers `create()` asynchronously, and what it answers is the interval that\n // actually holds \u2014 see `#reportRevision`.\n subscription.on(\"started\", () => {\n if (this.#subscription !== subscription) {\n return;\n }\n this.#reportRevision(\"publishing interval\", publishing_interval, subscription.publishingInterval);\n });\n\n for (const node of this.#nodes) {\n const sampling_interval = node.sampling_interval ?? this.#config.sampling_interval ?? publishing_interval;\n const item = opcua.ClientMonitoredItem.create(\n subscription,\n { nodeId: node.node_id, attributeId: ATTRIBUTE_ID_VALUE },\n {\n samplingInterval: sampling_interval,\n discardOldest: true,\n queueSize: this.#config.queue_size ?? DEFAULT_QUEUE_SIZE,\n },\n TIMESTAMPS_TO_RETURN_BOTH,\n );\n item.on(\"changed\", data_value => void this.#handleSample(node, data_value));\n item.on(\"err\", message => console.error(`[opcua-transport] Cannot monitor ${node.node_id}: ${message}`));\n item.on(\"initialized\", () => {\n if (this.#subscription !== subscription) {\n return;\n }\n this.#reportRevision(\n \"sampling interval\",\n sampling_interval,\n item.result?.revisedSamplingInterval,\n node.node_id,\n );\n });\n }\n\n console.log(`[opcua-transport] Connected, monitoring ${this.#nodes.length} node(s)`);\n }\n\n /**\n * The identity to open the session with, or undefined to connect anonymously.\n */\n #userIdentity(): OpcUaUserIdentity | undefined {\n const { username, password } = this.#config;\n if (username === undefined) {\n return undefined;\n }\n return { type: USER_TOKEN_TYPE_USER_NAME, userName: username, password: password ?? \"\" };\n }\n\n /**\n * Push a value change into the sink, on the node's channel, carrying the server's own clock.\n *\n * @param node The node the sample came from.\n * @param data_value The sample, as delivered by the monitored item.\n */\n async #handleSample(node: OpcUaNodeSpec, data_value: OpcUaDataValue): Promise {\n // `stop()` clears the subscription before tearing anything down, so a publication already\n // in flight when it was called never reaches a sink that has been let go of.\n if (this.#subscription === null) {\n return;\n }\n\n const status_code = data_value.statusCode?.value ?? 0;\n const status = data_value.statusCode?.name ?? \"Good\";\n if (status_code >>> 30 > STATUS_SEVERITY_UNCERTAIN) {\n this.#warnOnce(node.node_id, `${node.node_id} reports ${status}, samples dropped`);\n return;\n }\n\n const value = decodeOpcUaVariant(data_value.value);\n if (value === undefined) {\n this.#warnOnce(node.node_id, `${node.node_id} published no value, samples dropped`);\n return;\n }\n this.#warned_nodes.delete(node.node_id);\n\n const source_timestamp = data_value.sourceTimestamp ?? data_value.serverTimestamp ?? undefined;\n try {\n await this.#sink.ingest({\n channel: node.channel ?? node.node_id,\n payload: { node_id: node.node_id, value, status },\n received_at: new Date(),\n ...(source_timestamp ? { source_timestamp } : {}),\n metadata: { transport: \"opcua\", status_code, server_timestamp: data_value.serverTimestamp },\n });\n } catch (error) {\n console.error(`[opcua-transport] Sink failed:`, error);\n }\n }\n\n /**\n * Report an interval the server revised to something slower than what was asked for.\n *\n * Requesting a pace is all a client can do \u2014 the server answers with the one it will hold to, and\n * absorbing that answer silently is how a scene ends up moving at half the rate its configuration\n * describes, with nothing anywhere to say why. Most servers floor the publishing interval at\n * 50 ms; a node can also come back with the fastest its device can be read.\n *\n * A revision to something *faster* than requested costs the caller nothing and is not reported.\n *\n * @param what The interval being reported on, as it reads in the message.\n * @param requested The value asked for, in milliseconds.\n * @param revised The value the server answered with, if it gave one.\n * @param node_id The node the revision applies to, for a per-node interval.\n */\n #reportRevision(what: string, requested: number, revised: number | undefined, node_id?: string): void {\n if (revised === undefined || !(revised > requested + INTERVAL_REVISION_EPSILON_MS)) {\n return;\n }\n\n const key = `${what}:${requested}->${revised}`;\n if (this.#warned_intervals.has(key)) {\n return;\n }\n this.#warned_intervals.add(key);\n\n const subject = node_id === undefined ? what : `${what} of ${node_id}`;\n console.warn(\n `[opcua-transport] The server revised the ${subject} from ${requested} ms up to ${revised} ms \u2014 ` +\n `it will not go faster than that, whatever this transport requests.`,\n );\n }\n\n /**\n * Report a node as unusable, once per outage.\n *\n * @param node_id The node the message is about.\n * @param message The message to log.\n */\n #warnOnce(node_id: string, message: string): void {\n if (this.#warned_nodes.has(node_id)) {\n return;\n }\n this.#warned_nodes.add(node_id);\n console.warn(`[opcua-transport] ${message}`);\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { EventSink, Transport } from \"../Transport\";\nimport { PlaybackTransport, type FileTransportConfig, type PlaybackTransportConfig } from \"./PlaybackTransport\";\nimport { MqttTransport, type MqttTransportConfig } from \"./MqttTransport\";\nimport { AzureEventHubTransport, type AzureEventHubTransportConfig } from \"./AzureEventHubTransport\";\nimport { OpcUaTransport, type OpcUaTransportConfig } from \"./OpcUaTransport\";\n\n/**\n * A fully-resolved transport configuration: the registered kind and its kind-specific config.\n * The built-in kinds are typed below; custom kinds carry whatever config their factory expects.\n *\n * @category Data\n */\nexport type TransportSpec =\n | { kind: \"playback\"; config: PlaybackTransportConfig }\n | { kind: \"file\"; config: FileTransportConfig }\n | { kind: \"mqtt\"; config: MqttTransportConfig }\n | { kind: \"azure-event-hub\"; config: AzureEventHubTransportConfig }\n | { kind: \"opcua\"; config: OpcUaTransportConfig }\n | { kind: string; config: unknown };\n\n/**\n * The transport kinds bundled with the SDK.\n *\n * @category Data\n */\nexport type BuiltinTransportKind = \"playback\" | \"file\" | \"mqtt\" | \"azure-event-hub\" | \"opcua\";\n\n/**\n * A fully-resolved configuration for a **built-in** transport, its config typed per kind.\n *\n * Unlike the open {@link TransportSpec} (whose `{ kind: string; config: unknown }` member defeats\n * per-kind narrowing so custom kinds can be registered), this closed union lets a consumer that\n * only exposes the bundled transports narrow the config by `kind`. Custom kinds still go through\n * {@link TransportSpec}.\n *\n * @category Data\n */\nexport type BuiltinTransportSpec =\n | { kind: \"playback\"; config: PlaybackTransportConfig }\n | { kind: \"file\"; config: FileTransportConfig }\n | { kind: \"mqtt\"; config: MqttTransportConfig }\n | { kind: \"azure-event-hub\"; config: AzureEventHubTransportConfig }\n | { kind: \"opcua\"; config: OpcUaTransportConfig };\n\n/**\n * Builds a {@link Transport} bound to a sink from a kind-specific config.\n *\n * @category Data\n */\nexport type TransportFactory = (config: unknown, sink: EventSink) => Transport | Promise;\n\n/**\n * Registry of transport kinds.\n *\n * The {@link defaultTransportRegistry} ships with the built-in kinds (`\"playback\"`, `\"mqtt\"`,\n * `\"azure-event-hub\"`, `\"opcua\"`, plus `\"file\"` as a deprecated alias of `\"playback\"`); register\n * custom sources (a serial port, a proprietary bus, ...) under their own kind:\n *\n * ```typescript\n * defaultTransportRegistry.register({\n * kind: \"serial\",\n * factory: (config, sink) => new MySerialTransport(config as MySerialConfig, sink),\n * });\n * ```\n *\n * @category Data\n */\nexport class TransportRegistry {\n /**\n * The registered factories, keyed by kind.\n */\n readonly #factories = new Map();\n\n /**\n * The registered transport kinds.\n */\n get kinds(): Array {\n return Array.from(this.#factories.keys());\n }\n\n /**\n * Register a transport factory under a kind.\n *\n * @throws If the kind is already registered.\n */\n register({ kind, factory }: { kind: string; factory: TransportFactory }): void {\n if (this.#factories.has(kind)) {\n throw new Error(`Transport kind \"${kind}\" is already registered.`);\n }\n this.#factories.set(kind, factory);\n }\n\n /**\n * Whether a transport kind is registered.\n */\n has({ kind }: { kind: string }): boolean {\n return this.#factories.has(kind);\n }\n\n /**\n * Build a transport bound to a sink from a spec.\n *\n * @throws If the spec's kind is not registered.\n */\n async create({ spec, sink }: { spec: TransportSpec; sink: EventSink }): Promise {\n const factory = this.#factories.get(spec.kind);\n if (!factory) {\n throw new Error(`Unknown transport kind \"${spec.kind}\". Registered kinds: ${this.kinds.join(\", \")}.`);\n }\n return factory(spec.config, sink);\n }\n}\n\n/**\n * The default transport registry, pre-populated with the built-in transport kinds.\n *\n * @category Data\n */\nexport const defaultTransportRegistry = new TransportRegistry();\n\ndefaultTransportRegistry.register({\n kind: \"playback\",\n factory: (config, sink) => new PlaybackTransport(config as PlaybackTransportConfig, sink),\n});\n// Deprecated alias of `\"playback\"`, kept so a config naming the file-only transport still resolves.\n// It also keeps that transport's old `\"file\"` default channel, which `\"playback\"` has moved on from.\ndefaultTransportRegistry.register({\n kind: \"file\",\n factory: (config, sink) => {\n const { file_path, ...rest } = config as FileTransportConfig;\n return new PlaybackTransport({ default_channel: \"file\", ...rest, source: { file_path } }, sink);\n },\n});\ndefaultTransportRegistry.register({\n kind: \"mqtt\",\n factory: (config, sink) => new MqttTransport(config as MqttTransportConfig, sink),\n});\ndefaultTransportRegistry.register({\n kind: \"azure-event-hub\",\n factory: (config, sink) => new AzureEventHubTransport(config as AzureEventHubTransportConfig, sink),\n});\ndefaultTransportRegistry.register({\n kind: \"opcua\",\n factory: (config, sink) => new OpcUaTransport(config as OpcUaTransportConfig, sink),\n});\n\n/**\n * Builds a transport bound to a sink from a spec, using the\n * {@link defaultTransportRegistry}.\n *\n * @category Data\n */\nexport function createTransport(spec: TransportSpec, sink: EventSink): Promise {\n return defaultTransportRegistry.create({ spec, sink });\n}\n", "//------------------------------------------------------------------------------\nimport type { UUID, ComponentsManifest } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\nimport type { IngestEvent } from \"./IngestEvent\";\nimport type { JsonSchema } from \"./SchemaValidator\";\nimport type { EntityMap, MappedEntity } from \"./resolvers/ExistingEntityResolver\";\nimport type { EntityTemplate } from \"./resolvers/SpawningEntityResolver\";\n\n/**\n * The component patches to apply to one entity, keyed by component name. Values are partial\n * component values, applied through `entity.updateComponent` (which merges top-level attributes).\n *\n * @category Data\n */\nexport type ComponentUpdates = ComponentsManifest;\n\n/**\n * A whole-entity action, written instead of component patches when an event does not *change* the\n * entity but changes whether it is there at all \u2014 a device leaving the fleet, a machine part going\n * out of service.\n *\n * - `\"delete\"` removes the entity from the scene (and forgets its resolution, so a later event\n * carrying the same id resolves \u2014 or respawns \u2014 it);\n * - `\"hide\"` / `\"show\"` toggle `entity.is_visible`, keeping the entity and its resolution.\n *\n * Both `\"delete\"` and `\"hide\"` also stop a {@link continuous} update driving that id \u2014 nothing\n * visible is moving, so nothing should be written for it. `\"delete\"` drops the entity's state with\n * it; `\"hide\"` keeps it, so a later event resumes the motion from where it stopped rather than from\n * the beginning.\n *\n * @category Data\n */\nexport type EntityDirective = \"delete\" | \"hide\" | \"show\";\n\n/**\n * Brands a {@link ContinuousUpdate}, so a plain function is never mistaken for one. Not a lock \u2014\n * `Symbol.for` is reachable by string, and building the object by hand is a supported (if verbose)\n * alternative to {@link continuous}. It exists so `update: () => buildPatch(payload)`, a plausible\n * slip, cannot be read as a motion.\n *\n * Registered rather than module-private on two counts: two copies of the package loaded side by side\n * still recognise each other's continuations, and `tsc` cannot emit a declaration file for a type\n * keyed on a symbol it cannot name.\n *\n * @internal\n */\nexport const CONTINUOUS_UPDATE: unique symbol = Symbol.for(\"@3dverse/livelink-agent.continuous\");\n\n/**\n * What a {@link ContinuousUpdate} is handed every time it is sampled.\n *\n * @category Data\n */\nexport type ContinuousUpdateContext> = {\n /**\n * Seconds since the previous sample, and `0` on the event that installs the continuation \u2014 so a\n * value integrated with it (`state.x += rate * delta_seconds`) never double-counts the install,\n * and never runs away as re-reading {@link since_seconds} would.\n *\n * This is the one to reach for when a value **accumulates**; use {@link since_seconds} when it is\n * a closed-form function of how long the motion has been running.\n */\n delta_seconds: number;\n\n /**\n * Seconds since this continuation was installed \u2014 since the event that set the rate. `0` on that\n * installing event.\n */\n since_seconds: number;\n\n /**\n * Scratch space belonging to the **entity**, not to this motion: it outlives the event that\n * replaces the continuation, so a shaft told a new rpm carries on from the angle it had reached\n * rather than snapping back to zero. It is dropped only when the entity is deleted.\n *\n * This is what a mapping would otherwise keep in a `Map` of its own, with the phase read at event\n * time and written back on every tick \u2014 a pattern that is one misplaced read away from\n * accelerating forever.\n */\n state: TState;\n};\n\n/**\n * An update that keeps producing values after the event that installed it. Build one with\n * {@link continuous}.\n *\n * Some events carry a **rate**, not a value \u2014 \"the shaft is turning at 90 rpm\". A rate still means\n * something once the message that delivered it is gone, so a mapping that returned a finished patch\n * would leave the entity frozen until the next message. Returning one of these instead says *what\n * the entity is doing*, and the pipeline re-samples it on its own clock until a later event for the\n * same id replaces it.\n *\n * @category Data\n */\nexport type ContinuousUpdate> = {\n /** @internal */\n readonly [CONTINUOUS_UPDATE]: true;\n\n /**\n * Where the entity is *now*. Returns component patches, a whole-entity {@link EntityDirective}\n * (so a motion can end by hiding or deleting what it was driving \u2014 both also uninstall it), or\n * `null` when the motion is over \u2014 the continuation is then forgotten and the entity keeps its\n * last value.\n */\n sample(context: ContinuousUpdateContext): ComponentUpdates | EntityDirective | null;\n\n /**\n * The state to start from. Used **only** the first time this entity is given a state, so a later\n * event does not reset a motion already under way.\n */\n readonly initial_state?: TState;\n};\n\n/**\n * A {@link ContinuousUpdate} whose state type has been erased \u2014 what an {@link EntityUpdate} holds,\n * since one `updates` call may return several continuations, each with its own state shape.\n *\n * @category Data\n */\n// The single point where `TState` is erased. `state` sits in both a parameter and a property\n// position, so no concrete type (not `unknown`, not `never`) accepts every `ContinuousUpdate`;\n// the pipeline never reads the state, it only hands it back to the mapping that owns it.\n// eslint-disable-next-line @typescript-eslint/no-explicit-any\nexport type AnyContinuousUpdate = ContinuousUpdate;\n\n/**\n * Declare that an entity **keeps moving** between events, instead of writing one finished value.\n *\n * The function is re-sampled on the pipeline's clock until a later event for the same id replaces\n * it, it returns `null` when the motion is over, and `state` is scratch space that survives those\n * replacements \u2014 which is exactly what a phase needs:\n *\n * ```typescript\n * updates: event => {\n * const rpm = (event.payload as { rpm: number }).rpm;\n * return {\n * id: event.channel.split(\"/\")[2],\n * update: continuous<{ angle_deg: number }>(\n * ({ delta_seconds, state }) => {\n * // 360 degrees a turn, 60 seconds a minute.\n * state.angle_deg = (state.angle_deg + rpm * 6 * delta_seconds) % 360;\n * return { local_transform: { eulerOrientation: [state.angle_deg, 0, 0] } };\n * },\n * { initial_state: { angle_deg: 0 } },\n * ),\n * };\n * };\n * ```\n *\n * A motion runs until something replaces or stops it: a later event for the same id, a sample\n * returning `null`, a `\"hide\"` or `\"delete\"`, or {@link IngestionPipeline.clearContinuations}. An\n * event whose `updates` returns `null` is **not** one of those \u2014 it means \"this message said nothing\n * about this entity\", so a topic carrying payloads of several shapes leaves the motion alone.\n *\n * Wrapping is not ceremony: it is what keeps `update: () => buildPatch(payload)` \u2014 a plausible\n * slip, and a perfectly well-typed function \u2014 from silently installing a motion that never stops.\n *\n * @param sample - Where the entity is now, given the time elapsed and its own state.\n * @param options - `initial_state` for the value the entity's state starts at.\n *\n * @category Data\n */\nexport function continuous>(\n sample: (context: ContinuousUpdateContext) => ComponentUpdates | EntityDirective | null,\n options: { initial_state?: TState } = {},\n): ContinuousUpdate {\n return {\n [CONTINUOUS_UPDATE]: true,\n sample,\n initial_state: options.initial_state,\n };\n}\n\n/**\n * Whether an {@link EntityUpdate.update} is a motion rather than a patch or a directive.\n *\n * @internal\n */\nexport function isContinuousUpdate(update: EntityUpdate[\"update\"]): update is AnyContinuousUpdate {\n return typeof update === \"object\" && update !== null && CONTINUOUS_UPDATE in update;\n}\n\n/**\n * One entity driven by an event: the id addressing it, and what the event does to it. This is what\n * an {@link EventMapping.updates} function returns \u2014 one of these, or an array of them.\n *\n * @category Data\n */\nexport type EntityUpdate = {\n /**\n * The unique id of the object this update addresses \u2014 whatever that object is in the use case\n * (an AGV serial number, a machine part id, ...). It is resolved to an actual scene entity\n * through the mapping's {@link EventMapping.entities}.\n */\n id: string | number;\n\n /**\n * What the event does to that entity: component patches, a whole-entity {@link EntityDirective},\n * or a {@link continuous} update for something that keeps moving between events.\n */\n update: ComponentUpdates | EntityDirective | AnyContinuousUpdate;\n};\n\n/**\n * How an id from the event stream finds an entity **already present** in the scene. Exactly one of:\n *\n * - `byName` \u2014 the entity whose *name* the id produces, from a pattern embedding `{id}` (or a\n * function). Use it when the scene names its entities after the ids the stream carries: it removes\n * the need to collect and configure UUIDs entirely;\n * - `byUuid` \u2014 a fixed `id \u2192 entity UUID` table, for a known, closed population (the moving parts\n * of one machine);\n * - `resolve` \u2014 a function, for anything else (a lookup service, a naming convention with\n * exceptions, an id needing normalization).\n *\n * @category Data\n */\nexport type EntityLookup = {\n /**\n * The linkage to find the entities under \u2014 the chain of scene references leading to them, empty\n * (the default) for entities of the scene itself. A `byUuid` entry declaring its own linkage wins.\n */\n linkage?: Array;\n} & (\n | { byName: string | ((params: { id: string; event: IngestEvent }) => string); byUuid?: never; resolve?: never }\n | { byUuid: EntityMap; byName?: never; resolve?: never }\n | {\n resolve: (params: {\n id: string;\n event: IngestEvent;\n }) => UUID | MappedEntity | null | Promise;\n byName?: never;\n byUuid?: never;\n }\n);\n\n/**\n * The entities **of the 3dverse scene** a mapping drives, and how an id carried by its events finds\n * \u2014 or creates \u2014 one of them. Exactly one of four strategies:\n *\n * - `byName` \u2014 the entity whose *name* the id produces (a pattern embedding `{id}`, or a function);\n * - `byUuid` \u2014 a fixed `id \u2192 entity UUID` table;\n * - `resolve` \u2014 an arbitrary function, for lookups the two above cannot express;\n * - `spawn` \u2014 no pre-existing entity: one is **created** per new id, from a template. Use it when\n * the stream itself defines the population (one entity per device serial number).\n *\n * The first three find entities already in the scene and accept a `linkage` (see\n * {@link EntityLookup}); `spawn` creates at the scene root, and so takes none.\n *\n * @category Data\n */\nexport type SceneEntities =\n | (EntityLookup & { spawn?: never })\n | { spawn: EntityTemplate; byName?: never; byUuid?: never; resolve?: never; linkage?: never };\n\n/**\n * Describes how ONE event type drives entities in the scene: which events it covers (`channel` /\n * `when`), which entities those events drive (`entities`), and what each event does to them\n * (`updates`).\n *\n * A source carrying several event types (e.g. one schema per MQTT topic family) uses several\n * mappings \u2014 each event is handled by every mapping whose selectors match it.\n *\n * `updates` returns one {@link EntityUpdate} when an event is about a single object:\n *\n * ```typescript\n * const mapping: EventMapping = {\n * channel: \"uagv/+/+/+/visualization\",\n * entities: { spawn: { name: \"AGV-{id}\", components: { scene_ref: { value: SCENE } } } },\n * updates: event => ({\n * id: event.channel.split(\"/\")[3], // the serial number, from the topic\n * update: { local_transform: agvPoseToTransform(event.payload.agvPosition) },\n * }),\n * };\n * ```\n *\n * ...or an array of them when one event carries the state of several objects at once, the norm for a\n * machine publishing a whole-state frame:\n *\n * ```typescript\n * const mapping: EventMapping = {\n * entities: { byName: \"{id}\" },\n * updates: ({ payload }) => [\n * { id: \"blade\", update: { local_transform: { eulerOrientation: [0, payload.angle, 0] } } },\n * { id: \"carriage\", update: { local_transform: { position: [0, payload.posZ, 0] } } },\n * ],\n * };\n * ```\n *\n * The ids need not be written out: a controller publishing a whole data block names each value in the\n * payload **key**, so walking the payload into one entry per key drives as many entities as the frame\n * carries. Whichever way they are derived, they must be unique across everything the mapping drives \u2014\n * a key alone is not, once the channel pattern matches a second device.\n *\n * @category Data\n */\nexport type EventMapping = {\n /**\n * Only handle events whose channel matches this MQTT-style pattern (`+`/`*` = one segment,\n * trailing `#` = the rest). Omitted = all channels.\n *\n * Note that `channel` is only a meaningful selector on transports that put routing information\n * in it \u2014 see {@link IngestEvent.channel}. On an Azure Event Hub stream, select with `when`\n * instead.\n */\n channel?: string;\n\n /**\n * Only handle events for which this predicate returns true. Omitted = all events.\n */\n when?: (event: IngestEvent) => boolean;\n\n /**\n * JSON Schema of this event type. The **first** matching event is validated against it (a\n * cheap sanity check of the stream's shape); every event is validated when the\n * pipeline's `validate` option is on (debugging).\n */\n schema?: JsonSchema;\n\n /**\n * The scene entities this mapping's events drive, and how the ids they carry find \u2014 or create \u2014\n * one. See {@link SceneEntities}.\n */\n entities: SceneEntities;\n\n /**\n * What one event does: one {@link EntityUpdate} when it is about a single object, an array of\n * them when it carries several at once. Return `null` (or an empty array) to ignore the event.\n *\n * The whole event is passed, so an id can come from the payload, the channel, the metadata, or\n * several fields combined.\n *\n * Note that extracting this function to a bare `const` loses TypeScript's contextual typing of\n * its parameter; annotate it `EventMapping[\"updates\"]` if you do.\n */\n updates: (event: IngestEvent) => EntityUpdate | Array | null;\n};\n", "/**\n * A console reporter that emits each distinct warning only once, to keep high-frequency event\n * streams from flooding the logs with the same message.\n *\n * @internal\n */\nexport class WarnOnceReporter {\n readonly #seen = new Set();\n\n /**\n * Log `message` as a warning, unless a message was already logged under the same `key`.\n */\n warnOnce(key: string, message: string): void {\n if (this.#seen.has(key)) {\n return;\n }\n this.#seen.add(key);\n console.warn(message);\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { Entity } from \"@livelink.base/scene/Entity\";\nimport type { Scene } from \"@livelink.base/scene/Scene\";\nimport type { EntitiesCreatedEvent, EntitiesDeletedEvent } from \"@livelink.base/scene/SceneEvents\";\n\n//------------------------------------------------------------------------------\nimport type { IngestEvent } from \"../IngestEvent\";\nimport { WarnOnceReporter } from \"../util/reporting\";\n\n/**\n * Resolves the entity an ingested event addresses, from the unique id extracted from the\n * event (a serial number, a part id, ...).\n *\n * The SDK ships two strategies:\n * - {@link ExistingEntityResolver}: ids address entities already in the scene (by map, by name, or\n * through a resolve function),\n * - {@link SpawningEntityResolver}: an entity is spawned live for each new id.\n *\n * @internal\n */\nexport interface EntityResolver {\n /**\n * Resolve the entity for an id, or null when it cannot be resolved (unknown id, entity\n * not found, creation failed...).\n */\n resolve(params: { id: string; event: IngestEvent }): Promise;\n\n /**\n * Drop whatever is remembered about an id, so the next event carrying it resolves afresh.\n *\n * Called by the pipeline after a `\"delete\"` directive: the scene does **not** announce a\n * deletion the client itself performed, so the resolution has to be dropped explicitly (see\n * {@link CachingEntityResolver}).\n */\n forget(id: string): void;\n\n /**\n * Release whatever the resolver holds on the scene (event listeners, caches). Called when the\n * binding this resolver belongs to is unbound.\n */\n dispose?(): void;\n}\n\n/**\n * Base class for entity resolvers, factoring the concerns every strategy needs:\n *\n * - resolutions are cached per id (including null results, so a missing entity is looked up once),\n * - concurrent resolutions of the same id share a single in-flight production (events arriving\n * while an entity is being looked up or created await it instead of duplicating the work),\n * - production errors are logged, not cached, and resolve to null (so the next event retries),\n * - {@link CachingEntityResolver._warnOnce} avoids log spam for repeated unresolvable ids.\n *\n * **The cache largely invalidates itself from the scene's own events**: an id that resolved to\n * nothing is retried as soon as an entity that could satisfy it appears, and a resolution is dropped\n * when another client deletes its entity.\n *\n * Unless told not to (`manage_auto_broadcast: false`), the first successful resolution of an id sets\n * `entity.auto_broadcast = false` \u2014 the entity is being driven by this stream, so it should not\n * re-broadcast those writes to other clients.\n *\n * The one case the scene cannot announce is a deletion *this* client performed \u2014 `Scene.deleteEntities`\n * removes the entities from its registry and dispatches nothing, and the server's echo then matches\n * no registered entity. So a mapping returning the `\"delete\"` directive has its id dropped through an\n * explicit {@link forget}, which the pipeline calls.\n *\n * Subclasses implement {@link CachingEntityResolver._produce}.\n *\n * @internal\n */\nexport abstract class CachingEntityResolver implements EntityResolver {\n /**\n * Resolved entities (or null when unresolvable), keyed by id.\n */\n readonly #cache = new Map();\n\n /**\n * Productions in flight, to dedup concurrent resolutions of the same id.\n */\n readonly #in_flight = new Map>();\n\n /**\n * Warn-once reporter shared by the strategy implementations.\n */\n readonly #reporter = new WarnOnceReporter();\n\n /**\n * The scene this resolver resolves against, and whose events invalidate its cache.\n */\n readonly #scene: Scene;\n\n /**\n * Whether the first successful resolution of an id forces `entity.auto_broadcast = false`.\n */\n readonly #manage_auto_broadcast: boolean;\n\n /**\n * @param params\n * @param params.scene - The scene to resolve entities against.\n * @param params.manage_auto_broadcast - Whether to force `auto_broadcast = false` on the first\n * resolution of an id. See the class doc.\n */\n constructor({ scene, manage_auto_broadcast }: { scene: Scene; manage_auto_broadcast: boolean }) {\n this.#scene = scene;\n this.#manage_auto_broadcast = manage_auto_broadcast;\n this.#scene.addEventListener(\"on-entities-created\", this.#onEntitiesCreated);\n this.#scene.addEventListener(\"on-entities-deleted\", this.#onEntitiesDeleted);\n }\n\n /**\n * The scene this resolver resolves against.\n */\n protected get _scene(): Scene {\n return this.#scene;\n }\n\n /**\n * Resolve the entity for an id, producing (and caching) it on first sight.\n */\n async resolve({ id, event }: { id: string; event: IngestEvent }): Promise {\n const cached = this.#cache.get(id);\n if (cached !== undefined) {\n return cached;\n }\n\n const pending = this.#in_flight.get(id);\n if (pending) {\n return pending;\n }\n\n const production: Promise = this._produce({ id, event })\n .then(entity => {\n if (entity && this.#manage_auto_broadcast) {\n entity.auto_broadcast = false;\n }\n\n // A `forget` (or a `dispose`) landing while this was in flight drops the in-flight\n // entry; caching the result then would resurrect exactly what was asked to go.\n if (this.#in_flight.get(id) === production) {\n this.#cache.set(id, entity);\n }\n return entity;\n })\n .catch(error => {\n console.error(`[entity-resolver] Failed to resolve entity for id \"${id}\":`, error);\n return null;\n })\n .finally(() => {\n if (this.#in_flight.get(id) === production) {\n this.#in_flight.delete(id);\n }\n });\n\n this.#in_flight.set(id, production);\n return production;\n }\n\n /**\n * Drop what is remembered about an id \u2014 its cached resolution and any production in\n * flight \u2014 so the next event carrying it resolves (or respawns) afresh.\n */\n forget(id: string): void {\n this.#cache.delete(id);\n this.#in_flight.delete(id);\n }\n\n /**\n * Stop listening to the scene and drop everything cached.\n */\n dispose(): void {\n this.#scene.removeEventListener(\"on-entities-created\", this.#onEntitiesCreated);\n this.#scene.removeEventListener(\"on-entities-deleted\", this.#onEntitiesDeleted);\n this.#cache.clear();\n this.#in_flight.clear();\n }\n\n /**\n * Entities appeared in the scene: the ids that resolved to *nothing* and could be satisfied by\n * one of them are dropped, so they resolve again. Successful resolutions are untouched \u2014 they\n * are still valid.\n *\n * This is what makes an id mentioned by the stream before its entity exists work on its own,\n * instead of needing the caller to invalidate the cache by hand. {@link _couldBeSatisfiedBy}\n * keeps it from turning into a lookup storm when something else is spawning entities into the\n * same scene at stream rate.\n */\n #onEntitiesCreated = (event: EntitiesCreatedEvent): void => {\n for (const [id, entity] of this.#cache) {\n if (entity === null && this._couldBeSatisfiedBy({ id, created: event.entities })) {\n this.#cache.delete(id);\n }\n }\n };\n\n /**\n * An entity was deleted: drop the resolutions pointing at it, so the next event carrying that\n * id resolves again (and, with a spawning resolver, recreates it).\n */\n #onEntitiesDeleted = (event: EntitiesDeletedEvent): void => {\n for (const [id, entity] of this.#cache) {\n if (entity !== null && event.includes(entity)) {\n this.#cache.delete(id);\n }\n }\n };\n\n /**\n * Produce the entity for an id seen for the first time. Return null when the id is\n * unresolvable (the null is cached); throw to leave the id unresolved (the next event\n * retries).\n */\n protected abstract _produce(params: { id: string; event: IngestEvent }): Promise;\n\n /**\n * Whether any of the entities that just appeared could be the one an unresolved id addresses \u2014\n * i.e. whether it is worth paying for another lookup.\n *\n * Defaults to yes, which is always correct but re-looks-up every unresolved id on every\n * creation. A strategy that knows what it is looking for should narrow it: with a spawning\n * mapping feeding the same scene, an unnarrowed retry means one round trip per unresolved id\n * per spawn.\n */\n protected _couldBeSatisfiedBy(_params: { id: string; created: Array }): boolean {\n return true;\n }\n\n /**\n * Log a warning for an id once.\n */\n protected _warnOnce({ id, message }: { id: string; message: string }): void {\n this.#reporter.warnOnce(id, message);\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { UUID } from \"@3dverse/livelink.core\";\nimport type { Entity } from \"@livelink.base/scene/Entity\";\nimport type { Scene } from \"@livelink.base/scene/Scene\";\n\n//------------------------------------------------------------------------------\nimport type { IngestEvent } from \"../IngestEvent\";\nimport type { EntityLookup } from \"../EventMapping\";\nimport { CachingEntityResolver } from \"./EntityResolver\";\n\n/**\n * One entry of an {@link EntityMap}: the UUID of the entity an id drives, either bare or paired with\n * the linkage to find it under (the chain of scene references leading to it, empty for an entity of\n * the scene itself). A bare UUID takes the linkage declared alongside the map.\n *\n * @category Data\n */\nexport type MappedEntity = {\n /**\n * The UUID of the existing entity the id drives.\n */\n entity_uuid: UUID;\n\n /**\n * The linkage to find this entity under. Overrides the linkage declared alongside the map when\n * defined.\n */\n linkage?: Array;\n};\n\n/**\n * The mapping of ids (as carried by the events) to the existing entities they drive \u2014 the `byUuid`\n * strategy of an {@link EntityLookup}.\n *\n * @category Data\n */\nexport type EntityMap = Record;\n\n/**\n * The entry an id maps to, or null when the map does not declare it.\n *\n * An own-property test rather than an index read: an id is stream data, and a mapping is free to\n * take it straight from a payload key. `payload[\"constructor\"]` would otherwise reach\n * `Object.prototype`, pass the null check below, and send an `undefined` UUID to the scene instead of\n * being reported as the unmapped id it is.\n */\nfunction entryFor(by_uuid: EntityMap | undefined, id: string): UUID | MappedEntity | null {\n if (by_uuid === undefined || !Object.hasOwn(by_uuid, id)) {\n return null;\n }\n return by_uuid[id];\n}\n\n/**\n * Whether an entity sits under exactly the given linkage \u2014 the same lineage test\n * `Scene.findEntity` applies, needed because name lookups cannot express one.\n */\nfunction isUnderLinkage(entity: Entity, linkage: Array): boolean {\n const lineage = entity.lineage?.value ?? [];\n return lineage.length === linkage.length && lineage.every((uuid, index) => uuid === linkage[index]);\n}\n\n/**\n * Resolves ids against entities **already present** in the scene, through any of the three\n * {@link EntityLookup} strategies:\n *\n * - `byName` \u2014 the entity whose *name* the id produces (pattern with `{id}`, or a function), so a\n * scene that names its entities after the ids the stream carries needs no UUID configuration at\n * all;\n * - `byUuid` \u2014 a fixed `id \u2192 entity UUID` table, for a known, closed population;\n * - `resolve` \u2014 an arbitrary function, for lookups the two above cannot express.\n *\n * Ids that resolve to nothing, or to an entity missing from the scene, resolve to null with a\n * single warning \u2014 and are retried automatically once any entity appears in the scene (see\n * {@link CachingEntityResolver}).\n *\n * @internal\n */\nexport class ExistingEntityResolver extends CachingEntityResolver {\n /**\n * The lookup strategy and its shared linkage.\n */\n readonly #lookup: EntityLookup;\n\n /**\n * The linkage applied to the lookups that do not define one of their own.\n */\n readonly #linkage: Array;\n\n /**\n * What each id that failed to resolve was looking for \u2014 a name for `byName`, a UUID for\n * `byUuid` / `resolve` \u2014 so a later creation only triggers another lookup when it could actually\n * satisfy it. See {@link CachingEntityResolver._couldBeSatisfiedBy}.\n */\n readonly #sought = new Map();\n\n /**\n * @param params\n * @param params.scene - The scene holding the pre-existing entities.\n * @param params.lookup - The lookup strategy (`byName`, `byUuid` or `resolve`) and its linkage.\n * @param params.manage_auto_broadcast - Whether to force `auto_broadcast = false` on the entity\n * resolved for each new id. Defaults to `true`. See {@link CachingEntityResolver}.\n */\n constructor({\n scene,\n lookup,\n manage_auto_broadcast,\n }: {\n scene: Scene;\n lookup: EntityLookup;\n manage_auto_broadcast?: boolean;\n }) {\n super({ scene, manage_auto_broadcast: manage_auto_broadcast ?? true });\n this.#lookup = lookup;\n this.#linkage = lookup.linkage ?? [];\n }\n\n /**\n * Produce the entity for the given id and event.\n */\n protected async _produce({ id, event }: { id: string; event: IngestEvent }): Promise {\n // Cleared up front, so what is remembered is always this attempt's outcome: the lookup paths\n // below record what they failed to find, and record nothing when they succeed.\n this.#sought.delete(id);\n\n if (this.#lookup.byName !== undefined) {\n return this.#produceByName({ id, event });\n }\n return this.#produceByUuid({ id, event });\n }\n\n /**\n * Resolve through the `byName` strategy: find the entity carrying the name the id produces,\n * keeping only the candidates sitting under the configured linkage.\n */\n async #produceByName({ id, event }: { id: string; event: IngestEvent }): Promise {\n const by_name = this.#lookup.byName!;\n const name = typeof by_name === \"function\" ? by_name({ id, event }) : by_name.replaceAll(\"{id}\", id);\n\n const candidates = await this._scene.findEntitiesByNames({ entity_names: [name] });\n const matching = candidates.filter(entity => isUnderLinkage(entity, this.#linkage));\n\n if (matching.length === 0) {\n this.#sought.set(id, { name });\n this._warnOnce({\n id,\n message:\n `[entity-resolver] No entity named \"${name}\" (id \"${id}\") found in the scene` +\n `${this.#linkage.length > 0 ? ` under linkage [${this.#linkage.join(\", \")}]` : \"\"}; ` +\n `ignoring its events until one appears.`,\n });\n return null;\n }\n if (matching.length > 1) {\n this._warnOnce({\n id,\n message:\n `[entity-resolver] ${matching.length} entities are named \"${name}\" (id \"${id}\"); ` +\n `driving the first one. Give them distinct names, or use a linkage, to disambiguate.`,\n });\n }\n return matching[0];\n }\n\n /**\n * Resolve through the `byUuid` or `resolve` strategies, both of which produce a UUID (+ optional\n * per-entry linkage) to look up.\n */\n async #produceByUuid({ id, event }: { id: string; event: IngestEvent }): Promise {\n const entry = this.#lookup.resolve\n ? await this.#lookup.resolve({ id, event })\n : entryFor(this.#lookup.byUuid, id);\n\n if (!entry) {\n this._warnOnce({\n id,\n message: `[entity-resolver] No entity mapping for id \"${id}\"; ignoring its events.`,\n });\n return null;\n }\n\n const entity_uuid = typeof entry === \"string\" ? entry : entry.entity_uuid;\n const linkage = (typeof entry === \"string\" ? undefined : entry.linkage) ?? this.#linkage;\n\n const entity = await this._scene.findEntity({ entity_uuid, linkage });\n if (!entity) {\n this.#sought.set(id, { entity_uuid });\n this._warnOnce({\n id,\n message: `[entity-resolver] Entity ${entity_uuid} (id \"${id}\") not found in the scene; ignoring its events.`,\n });\n }\n return entity;\n }\n\n /**\n * Retry an unresolved id only when one of the entities that just appeared carries the name (or\n * the UUID) that id was looking for. An id whose lookup never got that far \u2014 a `resolve`\n * function returning null, an unmapped id \u2014 has nothing to match on, so it keeps the broad\n * retry.\n */\n protected override _couldBeSatisfiedBy({ id, created }: { id: string; created: Array }): boolean {\n const sought = this.#sought.get(id);\n if (!sought) {\n return true;\n }\n return created.some(entity => entity.name === sought.name || entity.id === sought.entity_uuid);\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { ComponentsManifest } from \"@3dverse/livelink.core\";\nimport type { Entity } from \"@livelink.base/scene/Entity\";\nimport type { Scene, EntityCreationOptions } from \"@livelink.base/scene/Scene\";\n\n//------------------------------------------------------------------------------\nimport type { IngestEvent } from \"../IngestEvent\";\nimport { CachingEntityResolver } from \"./EntityResolver\";\n\n/**\n * Describes the entity the pipeline creates for each new id, under a mapping whose `entities`\n * declares `spawn`.\n *\n * @category Data\n */\nexport type EntityTemplate = {\n /**\n * The name of the spawned entity. A string may embed the `{id}` placeholder\n * (e.g. `\"AGV-{id}\"`); a function receives the id and the triggering event.\n */\n name: string | ((params: { id: string; event: IngestEvent }) => string);\n\n /**\n * The components of the spawned entity. A function receives the id and the triggering event, to\n * derive initial values (e.g. the initial transform) from the first sighting.\n */\n components: ComponentsManifest | ((params: { id: string; event: IngestEvent }) => ComponentsManifest);\n\n /**\n * Additional entity creation options. Consider `delete_on_client_disconnection: true` so\n * spawned entities vanish with the agent.\n */\n options?: EntityCreationOptions;\n};\n\n/**\n * Spawns an entity for each new id, from a template.\n *\n * Use it when the data stream itself defines the population (e.g. one entity per device serial\n * number). The entity is created on the id's first sighting; concurrent events for the same id\n * await the single in-flight creation.\n *\n * @internal\n */\nexport class SpawningEntityResolver extends CachingEntityResolver {\n /**\n * The template describing the entity spawned for each new id.\n */\n readonly #template: EntityTemplate;\n\n /**\n * @param params\n * @param params.scene - The scene to spawn entities in.\n * @param params.template - The template describing the entity spawned for each new id.\n * @param params.manage_auto_broadcast - Whether to force `auto_broadcast = false` on the entity\n * spawned for each new id. Defaults to `true`. See {@link CachingEntityResolver}.\n */\n constructor({\n scene,\n template,\n manage_auto_broadcast,\n }: {\n scene: Scene;\n template: EntityTemplate;\n manage_auto_broadcast?: boolean;\n }) {\n super({ scene, manage_auto_broadcast: manage_auto_broadcast ?? true });\n this.#template = template;\n }\n\n /**\n * Produce the entity for the given id and event.\n */\n protected async _produce({ id, event }: { id: string; event: IngestEvent }): Promise {\n const { name, components, options } = this.#template;\n return this._scene.newEntity({\n name: typeof name === \"function\" ? name({ id, event }) : name.replaceAll(\"{id}\", id),\n components: typeof components === \"function\" ? components({ id, event }) : components,\n options,\n });\n }\n}\n", "//------------------------------------------------------------------------------\nimport isEqual from \"lodash/isEqual\";\nimport cloneDeep from \"lodash/cloneDeep\";\n\n//------------------------------------------------------------------------------\nimport type { ComponentName } from \"@3dverse/livelink.core\";\nimport type { Entity } from \"@livelink.base/scene/Entity\";\n\n//------------------------------------------------------------------------------\nimport type { ComponentUpdates } from \"../EventMapping\";\n\n/**\n * Applies component updates to entities, skipping redundant writes: the last patch applied per\n * (entity, component) is remembered and a deep-equal patch is a no-op \u2014 so a high-frequency stream\n * repeating the same values does not flood the update loop. (If another client rewrites the\n * component in between, the skip keeps the other client's value until the stream produces a\n * different one.)\n *\n * @internal\n */\nexport class ComponentPatchApplier {\n /**\n * The last patch applied, per entity and component.\n */\n readonly #last_applied = new WeakMap>();\n\n /**\n * Apply component updates to an entity.\n *\n * @returns How many component writes reached the scene and how many were skipped as redundant\n * \u2014 the pipeline reports both, so a stream that looks idle can be told apart from one whose\n * values simply are not changing.\n */\n apply({ entity, updates }: { entity: Entity; updates: ComponentUpdates }): {\n written: number;\n deduped: number;\n } {\n let written = 0;\n let deduped = 0;\n\n for (const [component_name, patch] of Object.entries(updates)) {\n if (patch === undefined) {\n continue;\n }\n\n let last_per_component = this.#last_applied.get(entity);\n if (!last_per_component) {\n last_per_component = new Map();\n this.#last_applied.set(entity, last_per_component);\n }\n if (isEqual(last_per_component.get(component_name), patch)) {\n deduped++;\n continue;\n }\n last_per_component.set(component_name, cloneDeep(patch));\n\n entity.updateComponent(component_name as ComponentName, patch);\n written++;\n }\n\n return { written, deduped };\n }\n}\n", "/**\n * A JSON Schema, as a plain JSON object.\n *\n * @category Data\n */\nexport type JsonSchema = Record;\n\n/**\n * Minimal structural view of the ajv module, avoiding a hard type dependency on its dual\n * (ESM/CJS) type declarations.\n *\n * @internal\n */\ntype AjvValidateFn = ((payload: unknown) => boolean) & { errors?: unknown };\ntype AjvLike = {\n compile(schema: object): AjvValidateFn;\n errorsText(errors?: unknown): string;\n};\ntype AjvConstructor = new (options?: object) => AjvLike;\n\n/**\n * The outcome of validating a payload.\n *\n * @inline\n * @internal\n */\nexport type ValidationResult = { valid: true } | { valid: false; errors: string };\n\n/**\n * Validates event payloads against a JSON Schema.\n *\n * Requires the optional dependency `ajv`, loaded lazily by {@link SchemaValidator.create} \u2014 the\n * rest of the data module works without it when no schema is configured.\n *\n * @internal\n */\nexport class SchemaValidator {\n /**\n * The validation function.\n *\n * @param payload The payload to validate.\n * @returns `true` if the payload is valid, `false` otherwise.\n */\n readonly #validate: (payload: unknown) => boolean;\n\n /**\n * Returns a human-readable string of the last validation errors.\n *\n * @returns A string describing the last validation errors.\n */\n readonly #errorsText: () => string;\n\n /**\n * Compile a validator for a schema.\n *\n * @throws If `ajv` is not installed or the schema does not compile.\n */\n static async create({ schema }: { schema: JsonSchema }): Promise {\n let ajv_module: { default?: AjvConstructor };\n try {\n ajv_module = (await import(\"ajv\")) as unknown as { default?: AjvConstructor };\n } catch {\n throw new Error(\n 'Event schema validation requires the optional dependency \"ajv\". Install it with `npm install ajv`.',\n );\n }\n\n // Depending on the module system the default export is either on `.default` or is the\n // module itself.\n const Ajv = ajv_module.default ?? (ajv_module as unknown as AjvConstructor);\n const ajv = new Ajv({ allErrors: true });\n const validate = ajv.compile(schema);\n return new SchemaValidator({\n validate: payload => validate(payload),\n errorsText: () => ajv.errorsText(validate.errors),\n });\n }\n\n /**\n *\n */\n private constructor({\n validate,\n errorsText,\n }: {\n validate: (payload: unknown) => boolean;\n errorsText: () => string;\n }) {\n this.#validate = validate;\n this.#errorsText = errorsText;\n }\n\n /**\n * Validate a payload against the schema.\n */\n validate(payload: unknown): ValidationResult {\n if (this.#validate(payload)) {\n return { valid: true };\n }\n return { valid: false, errors: this.#errorsText() };\n }\n}\n", "/**\n * Why an event (or one of the entity updates it produced) did not reach an entity.\n *\n * `no_binding` and `no_mapping_matched` are the two that matter during bring-up: they are the\n * difference between \"the stream is not arriving\", \"it arrives but nothing is listening yet\" and\n * \"it arrives but no mapping wants it\" \u2014 three failures that otherwise look identical from outside.\n *\n * @category Data\n */\nexport type IngestionDropReason =\n /** No scene was bound yet (no session ready), so the event had nowhere to go. */\n | \"no_binding\"\n /** No mapping's `channel` / `when` selectors matched the event. */\n | \"no_mapping_matched\"\n /** The payload did not match the mapping's JSON Schema. */\n | \"schema\"\n /** The mapping produced an update carrying no usable `id`. */\n | \"no_id\"\n /**\n * The event produced nothing to write: the mapping's `updates` returned null (or nothing) \u2014 a\n * deliberate ignore \u2014 or every entry it did return was a {@link continuous} update that reported\n * itself already over on its first sample, leaving nothing installed and nothing to apply.\n */\n | \"no_updates\"\n /** The id resolved to no entity in the scene. */\n | \"unresolved_entity\";\n\n/**\n * The ingestion counters of one {@link EventMapping}.\n *\n * @category Data\n */\nexport type MappingStats = {\n /** Index of the mapping in the pipeline's mapping list. */\n index: number;\n /** The mapping's channel pattern, when it declares one. */\n channel?: string;\n /** Events whose selectors matched this mapping. */\n events_matched: number;\n /** (entity update, scene) pairs this mapping successfully applied. */\n updates_applied: number;\n /** Events this mapping matched but did not apply, by reason. */\n drops: Partial>;\n /** When this mapping last matched an event. */\n last_event_at: Date | null;\n /**\n * {@link ContinuousUpdate}s this mapping currently drives. The global gauge answers \"is anything\n * moving?\"; this one answers \"which mapping is moving it?\", which is the question with more than\n * one mapping in play \u2014 and the one that tells a motion nobody replaced apart from a stream that\n * genuinely stopped.\n */\n continuations_active: number;\n};\n\n/**\n * A snapshot of what an {@link IngestionPipeline} has actually done \u2014 the answer to \"is data\n * flowing?\", which the transports and the scene cannot give on their own.\n *\n * Note that {@link events_matched} and {@link events_dropped} **overlap**: an event a mapping\n * selected but then applied nothing for (no id, no updates, unresolved entity) counts in both, so\n * their sum can exceed {@link events_received}.\n *\n * @category Data\n */\nexport type IngestionStats = {\n /** Events submitted to the pipeline, whatever became of them. */\n events_received: number;\n /** Events at least one mapping matched. Overlaps {@link events_dropped}. */\n events_matched: number;\n /** Events no mapping applied at all, for any reason. Overlaps {@link events_matched}. */\n events_dropped: number;\n /** (entity update, scene) pairs successfully applied. */\n updates_applied: number;\n /**\n * Component writes actually sent to the scene. Includes writes produced by a\n * {@link ContinuousUpdate} on a clock tick, not only those an event caused directly.\n */\n components_written: number;\n /** Component writes skipped because the value was unchanged. */\n components_deduped: number;\n /** Whole-entity directives (`delete` / `hide` / `show`) carried out. */\n directives_applied: number;\n /** Drop totals across every mapping. */\n drops: Partial>;\n /** When the pipeline last received an event, whatever became of it. */\n last_event_at: Date | null;\n /** When the pipeline last wrote to a scene. */\n last_applied_at: Date | null;\n /** Scenes currently bound. */\n bound_scene_count: number;\n /**\n * Clock ticks the pipeline has processed. Ticks are deliberately **not** counted as events:\n * {@link events_received} and {@link last_event_at} keep meaning \"data is arriving\" even while a\n * continuous update drives the scene on its own.\n */\n ticks_processed: number;\n /**\n * {@link ContinuousUpdate}s currently installed, across every mapping \u2014 the answer to \"the\n * stream is fine, so why is nothing moving?\". {@link MappingStats.continuations_active} breaks\n * it down by mapping.\n */\n continuations_active: number;\n /** Per-mapping breakdown, index-aligned with the pipeline's mappings. */\n per_mapping: Array;\n};\n\n/**\n * What an {@link IngestionPipeline} reports its work to. Two implementations: {@link StatsCollector},\n * which counts, and {@link NoopStatsCollector}, which does nothing \u2014 chosen by the pipeline's\n * `stats` option.\n *\n * Timestamps travel as epoch milliseconds so the counting path allocates nothing; `Date`s are\n * materialized in {@link snapshot} only.\n *\n * @internal\n */\nexport interface IngestionStatsCollector {\n eventReceived(at_ms: number): void;\n eventMatched(): void;\n eventDropped(): void;\n mappingMatched(index: number, at_ms: number): void;\n dropped(reason: IngestionDropReason, mapping_index?: number): void;\n applied(params: { mapping_index: number; written: number; deduped: number; directive: boolean }): void;\n tickProcessed(): void;\n /**\n * @param params.continuations_active - How many continuations each mapping currently drives,\n * index-aligned with them. A gauge rather than a counter: it is read off the pipeline at snapshot\n * time instead of being tracked here, so it cannot drift from the maps it describes.\n */\n snapshot(params: { bound_scene_count: number; continuations_active: Array }): IngestionStats;\n}\n\n/**\n * Mutable counters behind {@link IngestionStats}. Kept internal: consumers read immutable snapshots\n * through `pipeline.stats`.\n *\n * @internal\n */\nexport class StatsCollector implements IngestionStatsCollector {\n #events_received = 0;\n #events_matched = 0;\n #events_dropped = 0;\n #updates_applied = 0;\n #components_written = 0;\n #components_deduped = 0;\n #directives_applied = 0;\n #ticks_processed = 0;\n #last_event_at_ms: number | null = null;\n #last_applied_at_ms: number | null = null;\n readonly #drops = new Map();\n readonly #per_mapping: Array<{\n index: number;\n channel?: string;\n events_matched: number;\n updates_applied: number;\n drops: Map;\n last_event_at_ms: number | null;\n }>;\n\n constructor({ channels }: { channels: Array }) {\n this.#per_mapping = channels.map((channel, index) => ({\n index,\n ...(channel !== undefined ? { channel } : {}),\n events_matched: 0,\n updates_applied: 0,\n drops: new Map(),\n last_event_at_ms: null,\n }));\n }\n\n eventReceived(at_ms: number): void {\n this.#events_received++;\n this.#last_event_at_ms = at_ms;\n }\n\n eventMatched(): void {\n this.#events_matched++;\n }\n\n eventDropped(): void {\n this.#events_dropped++;\n }\n\n mappingMatched(index: number, at_ms: number): void {\n const mapping = this.#per_mapping[index];\n mapping.events_matched++;\n mapping.last_event_at_ms = at_ms;\n }\n\n dropped(reason: IngestionDropReason, mapping_index?: number): void {\n this.#drops.set(reason, (this.#drops.get(reason) ?? 0) + 1);\n if (mapping_index !== undefined) {\n const drops = this.#per_mapping[mapping_index].drops;\n drops.set(reason, (drops.get(reason) ?? 0) + 1);\n }\n }\n\n applied({\n mapping_index,\n written,\n deduped,\n directive,\n }: {\n mapping_index: number;\n written: number;\n deduped: number;\n directive: boolean;\n }): void {\n this.#updates_applied++;\n this.#components_written += written;\n this.#components_deduped += deduped;\n if (directive) {\n this.#directives_applied++;\n }\n this.#last_applied_at_ms = Date.now();\n this.#per_mapping[mapping_index].updates_applied++;\n }\n\n tickProcessed(): void {\n this.#ticks_processed++;\n }\n\n snapshot({\n bound_scene_count,\n continuations_active,\n }: {\n bound_scene_count: number;\n continuations_active: Array;\n }): IngestionStats {\n return {\n events_received: this.#events_received,\n events_matched: this.#events_matched,\n events_dropped: this.#events_dropped,\n updates_applied: this.#updates_applied,\n components_written: this.#components_written,\n components_deduped: this.#components_deduped,\n directives_applied: this.#directives_applied,\n drops: Object.fromEntries(this.#drops),\n last_event_at: toDate(this.#last_event_at_ms),\n last_applied_at: toDate(this.#last_applied_at_ms),\n bound_scene_count,\n ticks_processed: this.#ticks_processed,\n // Summed rather than passed in twice, so the total and the breakdown cannot disagree.\n continuations_active: continuations_active.reduce((total, count) => total + count, 0),\n per_mapping: this.#per_mapping.map(mapping => ({\n index: mapping.index,\n ...(mapping.channel !== undefined ? { channel: mapping.channel } : {}),\n events_matched: mapping.events_matched,\n updates_applied: mapping.updates_applied,\n drops: Object.fromEntries(mapping.drops),\n last_event_at: toDate(mapping.last_event_at_ms),\n continuations_active: continuations_active[mapping.index] ?? 0,\n })),\n };\n }\n}\n\n/**\n * The collector used when a pipeline is built with `stats: false`: every call is a no-op, so the\n * applied path costs nothing at all. Its {@link snapshot} is never called \u2014 a pipeline with stats\n * off reports `null` rather than a snapshot of zeros, which would read as \"nothing flowed\".\n *\n * @internal\n */\nexport class NoopStatsCollector implements IngestionStatsCollector {\n eventReceived(): void {}\n eventMatched(): void {}\n eventDropped(): void {}\n mappingMatched(): void {}\n dropped(): void {}\n applied(): void {}\n tickProcessed(): void {}\n snapshot(): IngestionStats {\n throw new Error(\"Stats are disabled on this pipeline (`stats: false`).\");\n }\n}\n\n/**\n * An epoch-millisecond timestamp as a `Date`, for a snapshot.\n */\nfunction toDate(at_ms: number | null): Date | null {\n return at_ms === null ? null : new Date(at_ms);\n}\n", "//------------------------------------------------------------------------------\nimport type { Entity } from \"@livelink.base/scene/Entity\";\nimport type { Scene } from \"@livelink.base/scene/Scene\";\n\n//------------------------------------------------------------------------------\nimport type { IngestEvent } from \"./IngestEvent\";\nimport type {\n AnyContinuousUpdate,\n ComponentUpdates,\n EntityDirective,\n EntityUpdate,\n EventMapping,\n SceneEntities,\n} from \"./EventMapping\";\nimport { isContinuousUpdate } from \"./EventMapping\";\nimport type { EntityResolver } from \"./resolvers/EntityResolver\";\nimport { ExistingEntityResolver } from \"./resolvers/ExistingEntityResolver\";\nimport { SpawningEntityResolver } from \"./resolvers/SpawningEntityResolver\";\nimport { ComponentPatchApplier } from \"./apply/ComponentPatchApplier\";\nimport { SchemaValidator } from \"./SchemaValidator\";\nimport {\n NoopStatsCollector,\n StatsCollector,\n type IngestionStats,\n type IngestionStatsCollector,\n} from \"./IngestionStats\";\nimport { matchChannel } from \"./util/channel\";\nimport { WarnOnceReporter } from \"./util/reporting\";\n\n/**\n * A scene attached to an {@link IngestionPipeline}. Hold it to detach that scene again; the\n * pipeline keeps ingesting into whatever is still bound.\n *\n * @category Data\n */\nexport type PipelineBinding = {\n /** The bound scene. */\n readonly scene: Scene;\n\n /** Detach the scene and release the per-scene resolvers (and their scene listeners). */\n unbind(): void;\n};\n\n/**\n * Options for an {@link IngestionPipeline}.\n *\n * @category Data\n */\nexport type IngestionPipelineOptions = {\n /**\n * The mapping(s) describing how events drive entities. An event is handled by every mapping\n * whose `channel` / `when` selectors match it.\n */\n mappings: EventMapping | Array;\n\n /**\n * Validate **every** event against the schema of the mappings that declare one (requires the\n * optional `ajv` dependency). Off by default: only the first matching event of each such\n * mapping is validated; full per-event validation is a debugging tool.\n */\n validate?: boolean;\n\n /**\n * Count what the pipeline does, readable through {@link IngestionPipeline.stats}. On by default:\n * the counting path allocates nothing and costs a handful of integer increments, well under what\n * a single component write already costs, and the `no_binding` / `no_mapping_matched` /\n * `unresolved_entity` breakdown is the only thing that tells \"the stream is not arriving\" apart\n * from \"nothing is listening yet\" and \"no mapping wants it\".\n *\n * Set it to `false` for the very highest-frequency streams; `stats` then reports `null`.\n */\n stats?: boolean;\n\n /**\n * Called when a mapping's `updates` function throws or returns something unusable, or when an\n * entity write fails. Ingestion continues \u2014 one bad event does not stop the stream.\n */\n onError?: (error: Error) => void;\n\n /**\n * On by default: the first time the pipeline resolves or spawns an entity for an id, it sets\n * `entity.auto_broadcast = false` \u2014 the entity is being driven by this stream, so it should not\n * re-broadcast those writes to other clients. Set to `false` to leave `auto_broadcast` untouched\n * and manage it yourself, e.g. through a `spawn` template's `options.auto_broadcast`, or directly\n * on entities found by `byName` / `byUuid` / `resolve`.\n */\n manage_auto_broadcast?: boolean;\n};\n\n/**\n * A continuous update currently driving one id, with what it needs to be re-sampled.\n */\ntype InstalledContinuation = {\n update: AnyContinuousUpdate;\n /**\n * Seconds this continuation has been advanced, accumulated from the ticks themselves rather\n * than read off the wall clock \u2014 so `tick` is the only thing that moves a motion forward, and\n * replaying the same ticks replays the same motion.\n */\n since_seconds: number;\n /**\n * The event to resolve this id against: a tick has none of its own, and resolution takes one.\n * Deliberately **stale** \u2014 it is the message that said which entity this motion is about.\n */\n event: IngestEvent;\n};\n\n/**\n * One mapping, its schema-validation state, the continuations it currently drives and the per-entity\n * state those hand back to it \u2014 all held once for the pipeline's lifetime.\n *\n * Continuations sit here, per mapping and keyed by id, rather than on a {@link BindingState} slot:\n * `updates` runs once per event and fans out to every bound scene, so a continuation must be sampled\n * once per tick and fan out the same way. Per binding, a stateful closure would advance once per\n * session \u2014 two sessions, and a shaft turns at double speed.\n *\n * `states` is keyed the same way and deliberately **outlives** the continuations reading it: a new\n * rate installs a new continuation, and the shaft must carry on from the angle it had reached.\n */\ntype CompiledMapping = {\n config: EventMapping;\n validator_promise: Promise | null;\n validated_first: boolean;\n continuations: Map;\n states: Map;\n};\n\n/**\n * One entity update on its way to the bound scenes, with the event that produced it \u2014 the event\n * itself for an ingested update, the installing event for one a continuation produced.\n */\ntype PendingUpdate = {\n entry: EntityUpdate;\n event: IngestEvent;\n};\n\n/**\n * The per-scene resolve+apply state of one mapping (index-aligned with the compiled mappings).\n */\ntype BindingState = {\n scene: Scene;\n slots: Array<{ resolver: EntityResolver; applier: ComponentPatchApplier }>;\n};\n\n/**\n * Turns ingested events into entity updates, in every scene bound to it, according to one or more\n * {@link EventMapping}s.\n *\n * This is the whole data layer, with **no** dependency on an {@link Agent}, a {@link Transport} or a\n * session: you bind scenes to it and push events in. That makes {@link IngestionPipeline.ingest} the\n * primary verb of the SDK's data module \u2014 a mapping can be exercised from a test, a webhook, a REST\n * handler or a replay tool without a broker anywhere in sight:\n *\n * ```typescript\n * const pipeline = new IngestionPipeline({ mappings });\n * pipeline.bind({ scene });\n * await pipeline.ingest({ channel: \"uagv/v2/m/AGV-1/visualization\", payload });\n * ```\n *\n * For each event: pick the matching mappings; per mapping, (opt.) validate the payload against its\n * schema, call its `updates` function to get one entity update or several \u2014 then, in each bound\n * scene, resolve every id to an entity (found or spawned per the mapping's `entities`) and apply its\n * update, skipping redundant component writes.\n *\n * To drive the scenes an {@link Agent} is attached to, and to feed the pipeline from a transport,\n * use {@link SceneIngestion} \u2014 it owns a pipeline and binds/unbinds sessions for you.\n *\n * @category Data\n */\nexport class IngestionPipeline {\n /**\n * The mappings, compiled once at construction.\n */\n readonly #mappings: Array;\n\n /**\n * Whether to validate every event against its schema (requires the optional `ajv` dependency).\n */\n readonly #validate_all: boolean;\n\n /**\n * Called when a mapping's own code throws or an entity write fails.\n */\n readonly #on_error: (error: Error) => void;\n\n /**\n * Whether the pipeline forces `auto_broadcast = false` on entities it resolves or spawns.\n */\n readonly #manage_auto_broadcast: boolean;\n\n /**\n * Warns once per unique message, to avoid log spam when many events fail the same way.\n */\n readonly #reporter = new WarnOnceReporter();\n\n /**\n * The bound scenes and their per-mapping resolve+apply state.\n */\n readonly #bindings = new Map();\n\n /**\n * What the pipeline has actually done, exposed as immutable snapshots through {@link stats}.\n * A {@link NoopStatsCollector} when the `stats` option is off.\n */\n readonly #stats: IngestionStatsCollector;\n\n /**\n * Whether {@link #stats} counts anything, so {@link stats} can report `null` instead of zeros.\n */\n readonly #stats_enabled: boolean;\n\n /**\n * @throws If no mapping is given, or a mapping is malformed \u2014 its `entities` declaring none of\n * the four strategies, or its `updates` not being a function. Both are unreachable from\n * TypeScript; they are what a JavaScript consumer gets instead of a compile error.\n */\n constructor({ mappings, validate, stats, onError, manage_auto_broadcast }: IngestionPipelineOptions) {\n this.#validate_all = validate ?? false;\n this.#on_error = onError ?? ((error): void => console.error(\"[ingestion-pipeline]\", error));\n this.#manage_auto_broadcast = manage_auto_broadcast ?? true;\n\n const list = Array.isArray(mappings) ? mappings : [mappings];\n if (list.length === 0) {\n throw new Error(\"IngestionPipeline requires at least one mapping.\");\n }\n this.#mappings = list.map((config, index) => {\n validateMapping(config, index);\n return {\n config,\n validator_promise: null,\n validated_first: false,\n continuations: new Map(),\n states: new Map(),\n };\n });\n\n this.#stats_enabled = stats ?? true;\n this.#stats = this.#stats_enabled\n ? new StatsCollector({ channels: list.map(mapping => mapping.channel) })\n : new NoopStatsCollector();\n }\n\n /**\n * What the pipeline has done so far \u2014 events in, updates out, and why anything was dropped.\n * `null` when the pipeline was built with `stats: false`.\n */\n get stats(): IngestionStats | null {\n if (!this.#stats_enabled) {\n return null;\n }\n return this.#stats.snapshot({\n bound_scene_count: this.#bindings.size,\n continuations_active: this.#continuationCounts(),\n });\n }\n\n /**\n * How many {@link ContinuousUpdate}s are installed across every mapping \u2014 the answer to \"the\n * stream is fine, so why is nothing moving?\".\n *\n * Also readable as `stats.continuations_active`; this getter works with `stats: false` too, and\n * is what {@link SceneIngestion} checks to know whether its clock has anything to advance.\n */\n get continuationCount(): number {\n let count = 0;\n for (const mapping of this.#mappings) {\n count += mapping.continuations.size;\n }\n return count;\n }\n\n /**\n * How many continuations each mapping drives, index-aligned with the mappings \u2014 what\n * {@link MappingStats.continuations_active} reports.\n */\n #continuationCounts(): Array {\n return this.#mappings.map(mapping => mapping.continuations.size);\n }\n\n /**\n * The number of scenes currently bound.\n */\n get boundSceneCount(): number {\n return this.#bindings.size;\n }\n\n /**\n * Attach a scene: ingested events start driving its entities. Each scene gets its own resolvers,\n * because a resolution (and its cache) is only meaningful against one scene.\n *\n * Binding the same scene twice returns two independent bindings; unbind the one you no longer\n * want.\n */\n bind({ scene }: { scene: Scene }): PipelineBinding {\n const binding: PipelineBinding = {\n scene,\n unbind: (): void => {\n const state = this.#bindings.get(binding);\n if (!state) {\n return;\n }\n this.#bindings.delete(binding);\n for (const { resolver } of state.slots) {\n resolver.dispose?.();\n }\n },\n };\n\n this.#bindings.set(binding, {\n scene,\n slots: this.#mappings.map(mapping => ({\n resolver: createResolver(mapping.config.entities, scene, this.#manage_auto_broadcast),\n applier: new ComponentPatchApplier(),\n })),\n });\n\n return binding;\n }\n\n /**\n * Stop the {@link ContinuousUpdate}s currently installed \u2014 one id's, or every one of them. The\n * entities keep their last value, and a later event carrying the same id installs a fresh motion.\n *\n * The answer to \"the broker died, why is the scene still moving?\". Nothing expires a motion on\n * its own, because \"no event replaced it\" is not the same fact as \"the stream is dead\" \u2014 one\n * topic may carry payloads of several shapes. {@link SceneIngestion} calls this when it stops\n * its sources.\n *\n * The per-entity state is **not** dropped, so a motion started again picks up where this one\n * stopped rather than snapping back.\n */\n clearContinuations({ id }: { id?: string } = {}): void {\n for (const mapping of this.#mappings) {\n if (id === undefined) {\n mapping.continuations.clear();\n } else {\n mapping.continuations.delete(id);\n }\n }\n }\n\n /**\n * Detach every bound scene.\n */\n unbindAll(): void {\n for (const binding of Array.from(this.#bindings.keys())) {\n binding.unbind();\n }\n }\n\n /**\n * Push one event through the pipeline: every mapping whose selectors match it drives the\n * entities it addresses, in every bound scene.\n *\n * Never throws \u2014 a mapping that throws is reported to `onError` and the stream continues.\n */\n async ingest(event: IngestEvent): Promise {\n const received_at_ms = event.received_at?.getTime() ?? Date.now();\n this.#stats.eventReceived(received_at_ms);\n\n if (this.#bindings.size === 0) {\n this.#stats.dropped(\"no_binding\");\n this.#stats.eventDropped();\n return;\n }\n\n let matched = false;\n let applied = false;\n for (let index = 0; index < this.#mappings.length; index++) {\n const mapping = this.#mappings[index];\n if (!this.#matches(mapping.config, event)) {\n continue;\n }\n matched = true;\n this.#stats.mappingMatched(index, received_at_ms);\n applied = (await this.#processWithMapping(mapping, index, event)) || applied;\n }\n\n if (!matched) {\n this.#stats.dropped(\"no_mapping_matched\");\n } else {\n this.#stats.eventMatched();\n }\n if (!applied) {\n this.#stats.eventDropped();\n }\n }\n\n /**\n * Advance every {@link ContinuousUpdate} currently installed, and write what they produce.\n *\n * This is what keeps a machine moving between two messages: an event that reported a *rate*\n * installed a continuation, and each tick asks it where the entity is now. It owns **no timer** \u2014\n * the caller decides the cadence, which is what makes a moving scene reproducible from a test:\n *\n * ```typescript\n * await pipeline.ingest(event); // \"turning at 90 rpm\"\n * await pipeline.tick(0.5); // half a second later, wherever that puts it\n * ```\n *\n * {@link SceneIngestion} calls this on its own interval, so a consumer using it has nothing to\n * do. A tick is deliberately **not** an event: it leaves `events_received` and `last_event_at`\n * alone, so those keep answering \"is data still arriving?\" while the scene moves.\n *\n * Never throws \u2014 a continuation that throws is reported to `onError` and dropped.\n */\n async tick(elapsed_seconds: number): Promise {\n this.#stats.tickProcessed();\n if (this.#bindings.size === 0) {\n return;\n }\n\n for (let index = 0; index < this.#mappings.length; index++) {\n const mapping = this.#mappings[index];\n if (mapping.continuations.size === 0) {\n continue;\n }\n const pending = this.#sampleContinuations(mapping, elapsed_seconds);\n if (pending.length === 0) {\n continue;\n }\n await Promise.all(\n Array.from(this.#bindings, ([binding, state]) =>\n this.#applyToBinding(binding, state, index, pending, { from_tick: true }),\n ),\n );\n }\n }\n\n /**\n * Sample one mapping's continuations once, dropping those that report they are done.\n *\n * Sampling happens here, once, rather than inside {@link #applyToBinding}: a continuation is\n * usually stateful, and running it once per bound scene would advance it once per session.\n */\n #sampleContinuations(mapping: CompiledMapping, elapsed_seconds: number): Array {\n const pending: Array = [];\n\n for (const [id, installed] of mapping.continuations) {\n installed.since_seconds += elapsed_seconds;\n\n const sampled = this.#sample(mapping, id, installed.update, {\n delta_seconds: elapsed_seconds,\n since_seconds: installed.since_seconds,\n });\n if (sampled === null) {\n mapping.continuations.delete(id);\n continue;\n }\n pending.push({ entry: { id, update: sampled }, event: installed.event });\n }\n\n return pending;\n }\n\n /**\n * Ask one continuous update where its entity is now, against the state the pipeline holds for\n * that id.\n *\n * @returns What to write, or null when the motion is over (or reported a failure) \u2014 in both cases\n * the caller uninstalls it.\n */\n #sample(\n mapping: CompiledMapping,\n id: string,\n update: AnyContinuousUpdate,\n time: { delta_seconds: number; since_seconds: number },\n ): ComponentUpdates | EntityDirective | null {\n // `initial_state` applies only to an id that has no state yet, so a later event carrying a\n // fresh rate cannot reset a motion already under way. Copied rather than shared, so one\n // `initial_state` object declared once in a mapping cannot end up driving every entity.\n const held = mapping.states.get(id);\n const state: object = held ?? { ...(update.initial_state ?? {}) };\n if (held === undefined) {\n mapping.states.set(id, state);\n }\n\n try {\n return update.sample({ ...time, state }) ?? null;\n } catch (error) {\n // A throwing continuation would throw again on every tick: drop it rather than report the\n // same failure thirty times a second.\n this.#on_error(error as Error);\n return null;\n }\n }\n\n /**\n * Whether an event is covered by a mapping's `channel`/`when` selectors.\n */\n #matches(config: EventMapping, event: IngestEvent): boolean {\n if (config.channel !== undefined && !matchChannel(config.channel, event.channel)) {\n return false;\n }\n return config.when === undefined || config.when(event);\n }\n\n /**\n * One mapping's pipeline: validate \u2192 work out the updates \u2192 resolve+apply in each bound scene.\n *\n * @returns Whether anything reached a scene.\n */\n async #processWithMapping(mapping: CompiledMapping, index: number, event: IngestEvent): Promise {\n if (!(await this.#validatePayload(mapping, event))) {\n this.#stats.dropped(\"schema\", index);\n return false;\n }\n\n const updates = this.#resolveUpdates(mapping, index, event);\n if (!updates) {\n return false;\n }\n\n const results = await Promise.all(\n Array.from(this.#bindings, ([binding, state]) =>\n this.#applyToBinding(\n binding,\n state,\n index,\n updates.map(entry => ({ entry, event })),\n { from_tick: false },\n ),\n ),\n );\n return results.some(Boolean);\n }\n\n /**\n * The entity updates one event produces through one mapping, normalized to an array: `updates`\n * may return a single {@link EntityUpdate}, an array of them, or null.\n *\n * Entries carrying no usable id are dropped here rather than in {@link #applyToBinding}, which\n * runs once per bound scene and would count each one twice over.\n */\n #resolveUpdates(mapping: CompiledMapping, index: number, event: IngestEvent): Array | null {\n let produced: EntityUpdate | Array | null;\n try {\n produced = mapping.config.updates(event);\n } catch (error) {\n this.#on_error(error as Error);\n return null;\n }\n\n if (produced === null || produced === undefined) {\n this.#stats.dropped(\"no_updates\", index);\n return null;\n }\n\n const updates = Array.isArray(produced) ? produced : [produced];\n if (updates.length === 0) {\n this.#stats.dropped(\"no_updates\", index);\n return null;\n }\n\n // The id is the only part of an entry the pipeline cannot work without \u2014 see `hasUsableId`.\n let usable = updates;\n if (!updates.every(hasUsableId)) {\n usable = updates.filter(hasUsableId);\n for (let dropped = usable.length; dropped < updates.length; dropped++) {\n this.#stats.dropped(\"no_id\", index);\n }\n this.#reporter.warnOnce(\n `no-id:${index}`,\n `[ingestion-pipeline] Mapping #${index} produced an update with no usable \\`id\\` for an event ` +\n `on channel \"${event.channel}\"; ignoring such updates. Its \\`updates\\` must return ` +\n `\\`{ id, update }\\` entries.`,\n );\n }\n\n const installed = this.#installContinuations(mapping, usable, event);\n if (installed.length === 0) {\n // Every entry was a motion already over on its first sample. Counted, so `events_dropped`\n // never lands with nothing in `drops` \u2014 which reads as the pipeline losing the event\n // rather than the mapping declining it. `usable` is empty only when `no_id` already\n // counted every entry.\n if (usable.length > 0) {\n this.#stats.dropped(\"no_updates\", index);\n }\n return null;\n }\n return installed;\n }\n\n /**\n * Install every continuation this event produced, and turn each into the patch it is worth right\n * now, so the entity moves on the event rather than waiting for the first tick.\n *\n * Installing here \u2014 where `updates` ran, once per event \u2014 is what keeps a continuation shared by\n * every bound scene instead of one per session.\n */\n #installContinuations(\n mapping: CompiledMapping,\n updates: Array,\n event: IngestEvent,\n ): Array {\n if (!updates.some(entry => isContinuousUpdate(entry.update))) {\n return updates;\n }\n\n const entries: Array = [];\n\n for (const entry of updates) {\n const update = entry.update;\n if (!isContinuousUpdate(update)) {\n entries.push(entry);\n continue;\n }\n\n const id = String(entry.id);\n mapping.continuations.set(id, { update, since_seconds: 0, event });\n\n // `delta_seconds` is 0 here: the install itself covers no time, so a value integrated\n // with it starts from wherever the entity's state already stood.\n const sampled = this.#sample(mapping, id, update, { delta_seconds: 0, since_seconds: 0 });\n // A continuation that is already done on its first sample never had anything to say.\n if (sampled === null) {\n mapping.continuations.delete(id);\n continue;\n }\n entries.push({ id: entry.id, update: sampled });\n }\n\n return entries;\n }\n\n /**\n * Resolve and apply every update of one mapping in one bound scene.\n *\n * @param from_tick - Whether these came from a clock tick rather than an event, which is what\n * decides whether a miss is worth counting: `drops` is an event-level story, and a continuation\n * driving an id one scene does not have would otherwise post a drop thirty times a second.\n *\n * @returns Whether at least one update reached an entity.\n */\n async #applyToBinding(\n binding: PipelineBinding,\n state: BindingState,\n index: number,\n updates: Array,\n { from_tick }: { from_tick: boolean },\n ): Promise {\n const { resolver, applier } = state.slots[index];\n\n // Nothing here can address an entity that does not exist yet: a scene pulling others in\n // through `scene_ref` components is streamed in progressively, and resolving against a\n // half-loaded one would answer misses for entities that are simply still on their way.\n //\n // This wait has no deadline of its own, so a scene the server never reports as loaded parks\n // every event and every tick until the session disconnects \u2014 which settles them all and lets\n // them drain. Deliberate: a scene still loading has nothing to drive, and going ahead would\n // only cache misses for entities that are on their way.\n await state.scene.waitForSceneLoaded();\n\n const results = await Promise.all(\n updates.map(async ({ entry, event }) => {\n const id = String(entry.id);\n // The resolver caches every answer, misses included, so a tick costs a map lookup\n // rather than a trip through the mapping's own `byName` / `resolve`.\n const entity = await resolver.resolve({ id, event });\n if (!entity) {\n if (!from_tick) {\n this.#stats.dropped(\"unresolved_entity\", index);\n }\n // A continuation is deliberately left installed. This runs once per bound scene\n // against a map shared by all of them, so uninstalling would stop the motion in\n // every other scene \u2014 and at bring-up it would stop it inside the very\n // `ingest()` that installed it. The scene's own `on-entities-created` drops the\n // cached miss, so the motion starts by itself once the entity appears.\n return false;\n }\n // The scene may have gone while the resolution was in flight: writing now would\n // drive a session this pipeline no longer has anything to do with.\n if (!this.#bindings.has(binding)) {\n return false;\n }\n try {\n await this.#applyUpdate({\n scene: state.scene,\n entity,\n update: entry.update,\n resolver,\n applier,\n id,\n index,\n });\n return true;\n } catch (error) {\n this.#on_error(error as Error);\n return false;\n }\n }),\n );\n return results.some(Boolean);\n }\n\n /**\n * Apply one entry's update to its entity: component patches, or a whole-entity directive.\n *\n * A `\"delete\"` drops the id from the resolver explicitly: `Scene.deleteEntities` does not\n * announce a deletion the client performed itself (it empties its registry, so the server's echo\n * then matches nothing), so the resolver's `on-entities-deleted` listener \u2014 which does cover\n * deletions by *other* clients \u2014 never fires for this one.\n */\n async #applyUpdate({\n scene,\n entity,\n update,\n resolver,\n applier,\n id,\n index,\n }: {\n scene: Scene;\n entity: Entity;\n update: EntityUpdate[\"update\"];\n resolver: EntityResolver;\n applier: ComponentPatchApplier;\n id: string;\n index: number;\n }): Promise {\n if (typeof update === \"string\") {\n switch (update) {\n case \"delete\":\n await scene.deleteEntities({ entities: [entity] });\n resolver.forget(id);\n // Whatever this entity was doing, it is not doing it any more \u2014 and the state it\n // was doing it with goes with it, so an id that comes back starts clean.\n this.#mappings[index].continuations.delete(id);\n this.#mappings[index].states.delete(id);\n break;\n case \"hide\":\n entity.is_visible = false;\n // Nothing anyone can see is moving, so stop paying thirty writes a second for\n // it. The entity's state stays \u2014 a later event can pick the motion back up from\n // where it left off, which is what \"hide\" rather than \"delete\" asked for.\n this.#mappings[index].continuations.delete(id);\n break;\n case \"show\":\n entity.is_visible = true;\n break;\n default:\n // A string that is not a directive is a mapping bug, not a silent no-op: report\n // it rather than counting it as something that reached the scene.\n this.#on_error(\n new Error(\n `Mapping #${index} returned \"${update}\", which is not an entity directive ` +\n `(\"delete\", \"hide\" or \"show\"); ignoring it.`,\n ),\n );\n return;\n }\n this.#stats.applied({ mapping_index: index, written: 0, deduped: 0, directive: true });\n return;\n }\n\n if (typeof update === \"function\") {\n // A bare function is not a motion \u2014 `continuous()` is. Caught here rather than passed to\n // the applier, which would write a function's enumerable properties (nothing at all) and\n // silently move nothing.\n this.#on_error(\n new Error(\n `Mapping #${index} returned a bare function as an \\`update\\`; ignoring it. ` +\n `Wrap it in \\`continuous(fn)\\` to declare an entity that keeps moving between events.`,\n ),\n );\n return;\n }\n\n if (isContinuousUpdate(update)) {\n // Unreachable: continuations are installed and sampled into patches before they get here.\n this.#on_error(\n new Error(\n `Mapping #${index} produced a continuous update that reached the applier unsampled; ` +\n `ignoring it. This is an SDK bug, please report it.`,\n ),\n );\n return;\n }\n\n const { written, deduped } = applier.apply({ entity, updates: update as ComponentUpdates });\n this.#stats.applied({ mapping_index: index, written, deduped, directive: false });\n }\n\n /**\n * Validate the event payload against the mapping's schema: the first matching event always,\n * every event when the `validate` option is on. Mappings without a schema always pass.\n */\n async #validatePayload(mapping: CompiledMapping, event: IngestEvent): Promise {\n const schema = mapping.config.schema;\n if (!schema) {\n return true;\n }\n if (!this.#validate_all && mapping.validated_first) {\n return true;\n }\n mapping.validated_first = true;\n\n // Lazy ajv import + compilation, shared across events; a schema that cannot compile (or a\n // missing ajv install) is reported once and skips validation from then on.\n mapping.validator_promise ??= SchemaValidator.create({ schema });\n let validator: SchemaValidator;\n try {\n validator = await mapping.validator_promise;\n } catch (error) {\n this.#reporter.warnOnce(\n `validator:${event.channel}`,\n `[ingestion-pipeline] ${error instanceof Error ? error.message : String(error)}`,\n );\n return true;\n }\n\n const result = validator.validate(event.payload);\n if (!result.valid) {\n this.#reporter.warnOnce(\n `invalid:${result.errors}`,\n `[ingestion-pipeline] Event on channel \"${event.channel}\" does not match the mapping's schema: ` +\n result.errors,\n );\n return false;\n }\n return true;\n }\n}\n\n/**\n * Whether an update entry carries an id the pipeline can resolve.\n *\n * Not defensive typing, despite `id` being typed: `String(undefined)` is `\"undefined\"`, a\n * valid-looking id that would silently drive \u2014 or spawn \u2014 one wrong entity for every entry missing\n * one. And it is reachable from clean TypeScript through the documented idiom, since\n * `event.channel.split(\"/\")[3]` is typed `string` but is `undefined` on a shorter channel. Catching\n * it here turns that into a counted `no_id` drop and one warning.\n */\nfunction hasUsableId(entry: EntityUpdate): boolean {\n return typeof entry.id === \"string\" || typeof entry.id === \"number\";\n}\n\n/**\n * Check a mapping is well-formed, at construction rather than on the first event (or, for\n * `entities`, rather than on the first `bind`, where the failure would surface from a session-ready\n * handler and read as a session error).\n *\n * Neither condition is reachable from TypeScript; this is what a JavaScript consumer gets in place\n * of a compile error, so both messages name the whole shape rather than the missing key.\n */\nfunction validateMapping(config: EventMapping, index: number): void {\n const entities = config.entities as SceneEntities | undefined;\n if (\n entities === undefined ||\n (entities.byName === undefined &&\n entities.byUuid === undefined &&\n entities.resolve === undefined &&\n entities.spawn === undefined)\n ) {\n throw new Error(\n `Mapping #${index}: \\`entities\\` must declare exactly one of \\`byName\\`, \\`byUuid\\`, ` +\n `\\`resolve\\` (entities already in the scene) or \\`spawn\\` (one created per new id).`,\n );\n }\n if (typeof config.updates !== \"function\") {\n throw new Error(\n `Mapping #${index}: \\`updates\\` must be a function of the event, returning one ` +\n `\\`{ id, update }\\` entry, an array of them, or null.`,\n );\n }\n}\n\n/**\n * Build the resolver of one mapping for one scene, per its `entities` declaration. Total: a mapping\n * declaring no strategy was rejected at construction by {@link validateMapping}.\n */\nfunction createResolver(entities: SceneEntities, scene: Scene, manage_auto_broadcast: boolean): EntityResolver {\n return entities.spawn !== undefined\n ? new SpawningEntityResolver({ scene, template: entities.spawn, manage_auto_broadcast })\n : new ExistingEntityResolver({ scene, lookup: entities, manage_auto_broadcast });\n}\n", "//------------------------------------------------------------------------------\nimport { TypedEventTarget } from \"@livelink.base/TypedEventTarget\";\n\n/**\n * A {@link TypedEventTarget} that knows whether anyone is listening to it.\n *\n * A plain `EventTarget` cannot answer that \u2014 `dispatchEvent` returns whether the event was\n * cancelled, not whether it reached anybody \u2014 so an emitter with something worth saying when nobody\n * subscribed (an error that would otherwise vanish) has no way to tell. This subclass tracks its own\n * listeners to answer it, and stays out of `livelink.base` because only {@link SceneIngestion} needs\n * the capability.\n *\n * It is not exported from the package root, but it deliberately carries **no** internal-marker tag:\n * this tsconfig sets `stripInternal`, which erases a marked declaration from the emitted `.d.ts`\n * altogether \u2014 and since {@link SceneIngestion} extends this class, stripping it would take\n * `addEventListener` and every other inherited member off `SceneIngestion`'s public type with it.\n * (Beware: `stripInternal` scans the comment text, so even naming that tag in prose here triggers\n * it.)\n */\nexport class ObservedEventTarget> extends TypedEventTarget {\n /**\n * The listeners currently registered, per event name, mapping the listener the caller passed to\n * the function actually registered on the underlying target (they differ for a `once` listener,\n * which is wrapped to keep this bookkeeping honest).\n *\n * Capture is deliberately not part of the identity: the underlying {@link EventTarget} is not in\n * a DOM tree, so nothing ever propagates and the capture flag cannot distinguish two listeners.\n */\n readonly #listeners = new Map void>>();\n\n /**\n * Register a listener, remembering it so {@link _hasListeners} can report on it.\n */\n override addEventListener<_EventName extends keyof EventMap & string>(\n event_name: _EventName,\n listener: (event: EventMap[_EventName]) => void,\n options?: AddEventListenerOptions | boolean,\n ): void {\n let registered = this.#listeners.get(event_name);\n if (!registered) {\n registered = new Map();\n this.#listeners.set(event_name, registered);\n }\n // The underlying target ignores a duplicate (name, listener) pair; mirror that here so the\n // tracking cannot double-count.\n if (registered.has(listener)) {\n return;\n }\n\n // A `once` listener is dropped by the underlying target without going through\n // `removeEventListener`, and an aborted `signal` does the same \u2014 both would otherwise leave\n // this map claiming a listener that is gone.\n const once = typeof options === \"object\" && options.once === true;\n const actual: (event: EventMap[_EventName]) => void = once\n ? (event): void => {\n this.#untrack(event_name, listener);\n listener(event);\n }\n : listener;\n\n if (typeof options === \"object\" && options.signal) {\n options.signal.addEventListener(\"abort\", () => this.#untrack(event_name, listener), { once: true });\n }\n\n registered.set(listener, actual as (event: never) => void);\n super.addEventListener(event_name, actual, options);\n }\n\n /**\n * Remove a listener \u2014 the function that was actually registered for it, which for a `once`\n * listener is the wrapper rather than the listener itself.\n */\n override removeEventListener<_EventName extends keyof EventMap & string>(\n event_name: _EventName,\n listener: (event: EventMap[_EventName]) => void,\n options?: EventListenerOptions | boolean,\n ): void {\n const actual = this.#listeners.get(event_name)?.get(listener);\n if (!actual) {\n return;\n }\n this.#untrack(event_name, listener);\n super.removeEventListener(event_name, actual as (event: EventMap[_EventName]) => void, options);\n }\n\n /**\n * Whether anything is currently listening for an event. Lets an emitter fall back to another\n * channel \u2014 a console log for an error nobody observes \u2014 instead of dispatching into the void.\n */\n protected _hasListeners<_EventName extends keyof EventMap & string>(event_name: _EventName): boolean {\n return (this.#listeners.get(event_name)?.size ?? 0) > 0;\n }\n\n /**\n * Drop a listener from the tracking map, without touching the underlying target.\n */\n #untrack(event_name: string, listener: unknown): void {\n const registered = this.#listeners.get(event_name);\n if (!registered) {\n return;\n }\n registered.delete(listener);\n if (registered.size === 0) {\n this.#listeners.delete(event_name);\n }\n }\n}\n", "//------------------------------------------------------------------------------\nimport type { Livelink } from \"../Livelink\";\nimport type {\n AgentStoppedEvent,\n SessionCreatedEvent,\n SessionJoinedEvent,\n SessionLeftEvent,\n SessionReadyEvent,\n} from \"../AgentEvents\";\n\n/**\n * Event emitted once the sources have started and the ingestion is live.\n *\n * Dispatched by {@link SceneIngestion} as `on-running`.\n *\n * @event\n * @noInheritDoc\n * @category Data / Events\n */\nexport class IngestionRunningEvent extends Event {\n /**\n * @internal\n */\n constructor() {\n super(\"on-running\");\n }\n}\n\n/**\n * Event emitted when a session's scene has been bound to the pipeline \u2014 from here on, ingested\n * events drive its entities.\n *\n * Dispatched by {@link SceneIngestion} as `on-session-bound`.\n *\n * @event\n * @noInheritDoc\n * @category Data / Events\n */\nexport class SessionBoundEvent extends Event {\n /**\n * The livelink of the bound session.\n */\n public readonly livelink: Livelink;\n\n /**\n * @internal\n */\n constructor({ livelink }: { livelink: Livelink }) {\n super(\"on-session-bound\");\n this.livelink = livelink;\n }\n}\n\n/**\n * Event emitted when a session's scene has been unbound from the pipeline.\n *\n * Dispatched by {@link SceneIngestion} as `on-session-unbound`.\n *\n * @event\n * @noInheritDoc\n * @category Data / Events\n */\nexport class SessionUnboundEvent extends Event {\n /**\n * The livelink of the unbound session.\n */\n public readonly livelink: Livelink;\n\n /**\n * @internal\n */\n constructor({ livelink }: { livelink: Livelink }) {\n super(\"on-session-unbound\");\n this.livelink = livelink;\n }\n}\n\n/**\n * Event emitted when a source fails to start, a mapping throws, or the underlying agent errors.\n * Ingestion continues \u2014 this reports, it does not stop.\n *\n * Dispatched by {@link SceneIngestion} as `on-error`.\n *\n * @event\n * @noInheritDoc\n * @category Data / Events\n */\nexport class IngestionErrorEvent extends Event {\n /**\n * The error that occurred.\n */\n public readonly error: Error;\n\n /**\n * @internal\n */\n constructor({ error }: { error: Error }) {\n super(\"on-error\");\n this.error = error;\n }\n}\n\n/**\n * Events emitted by a {@link SceneIngestion}.\n *\n * The {@link Agent}'s own session-lifecycle events are **re-emitted here as they happen**, so a\n * consumer observes one object instead of reaching through `ingestion.agent` for half of what it\n * needs. `on-error` covers both the agent's errors and the ingestion's own.\n *\n * Declared key by key rather than as `Omit & { \u2026 }`: TypeDoc expands only\n * the literal half of an intersection, so the re-emitted session events went undocumented.\n * `livelink.agent/tests/EventMaps.test.ts` fails to compile if this drifts from {@link AgentEvents}.\n *\n * @event\n * @category Data / Events\n */\nexport type SceneIngestionEvents = {\n \"on-session-created\": SessionCreatedEvent;\n \"on-session-joined\": SessionJoinedEvent;\n \"on-session-ready\": SessionReadyEvent;\n \"on-session-left\": SessionLeftEvent;\n \"on-stopped\": AgentStoppedEvent;\n \"on-running\": IngestionRunningEvent;\n \"on-session-bound\": SessionBoundEvent;\n \"on-session-unbound\": SessionUnboundEvent;\n \"on-error\": IngestionErrorEvent;\n};\n", "//------------------------------------------------------------------------------\nimport type { UUID } from \"@3dverse/livelink.core\";\n\n//------------------------------------------------------------------------------\n// Not a plain `TypedEventTarget`: `#reportError` falls back to the console when nobody is listening\n// for `on-error`, which needs to know whether anybody is.\nimport { ObservedEventTarget } from \"../ObservedEventTarget\";\n\n//------------------------------------------------------------------------------\n// `SceneIngestion` receives a pre-built `Agent` rather than constructing one \u2014 the caller owns the\n// agent's attachment policy (mode, watch, leave-on-condition) and can observe it before start. It\n// only ever references `Agent`/`Livelink` as types (never `new`s them), so these stay `import type`.\nimport type { Agent } from \"../Agent\";\nimport type { Livelink } from \"../Livelink\";\nimport {\n SessionCreatedEvent,\n SessionJoinedEvent,\n SessionLeftEvent,\n SessionReadyEvent,\n type AgentErrorEvent,\n AgentStoppedEvent,\n} from \"../AgentEvents\";\n\n//------------------------------------------------------------------------------\nimport type { EventSink, Transport } from \"./Transport\";\nimport type { IngestEvent } from \"./IngestEvent\";\nimport type { IngestionStats } from \"./IngestionStats\";\nimport type { IngestionPipeline, PipelineBinding } from \"./IngestionPipeline\";\nimport {\n IngestionErrorEvent,\n IngestionRunningEvent,\n SessionBoundEvent,\n SessionUnboundEvent,\n type SceneIngestionEvents,\n} from \"./SceneIngestionEvents\";\nimport { createTransport, type TransportSpec } from \"./transports/TransportRegistry\";\n\n//------------------------------------------------------------------------------\n// The same guard every rate in the SDK goes through, so `ticks_per_second` and `updates_per_second`\n// reject the same things \u2014 and so `NaN` never reaches `setInterval`.\nimport { computeIntervalInMs } from \"@livelink.base/rates\";\n\n/**\n * The most time one tick may report, in seconds. A process that was suspended \u2014 a laptop lid, a\n * debugger stopped on a breakpoint, a container throttled \u2014 comes back with minutes of wall clock to\n * account for, and handing that to a motion teleports it. Clamping loses that time on purpose: the\n * scene resumes where it was rather than where it would have been.\n */\nconst MAX_TICK_SECONDS = 0.5;\n\n/**\n * The clock rate to use when the caller does not choose one: twice the client's own flush rate,\n * capped at what a timer will accept.\n *\n * Ticking *at* the flush rate reads as free \u2014 the extra samples merge away \u2014 but the two timers are\n * free-running and beat against each other, so the age of the sample at flush time wanders across a\n * whole flush window (33 ms at 30 Hz) and the motion visibly jitters. Sampling twice as often bounds\n * that wander to half a window. Falls back to 60, twice `LivelinkBase`'s own default of 30.\n */\nfunction defaultTicksPerSecond(agent: Agent): number {\n const updates_per_second = agent.config.headless_client?.updates_per_second;\n if (typeof updates_per_second !== \"number\" || !(updates_per_second > 0)) {\n return 60;\n }\n return Math.min(updates_per_second * 2, 125);\n}\n\n/**\n * Builds a {@link Transport} bound to the ingestion, for a source a {@link TransportSpec} cannot\n * describe.\n *\n * Reach for it when you want **this ingestion to own the transport's lifecycle** \u2014 started lazily\n * with the others on the first bound session, stopped with them on `stop()` \u2014 but the transport is a\n * one-off you would rather not publish as a kind on the process-wide\n * {@link defaultTransportRegistry}. Register a kind instead when several ingestions (or an HTTP API)\n * need to name that transport; construct the transport yourself against the ingestion \u2014 it *is* an\n * {@link EventSink} \u2014 when you would rather own its start and stop.\n *\n * Distinct from the registry's `TransportFactory`, which also takes the kind-specific config.\n *\n * @category Data\n */\nexport type IngestionTransportFactory = (sink: EventSink) => Transport | Promise;\n\n/**\n * One upstream data source of a {@link SceneIngestion}.\n *\n * @category Data\n */\nexport type IngestionSource = TransportSpec | IngestionTransportFactory;\n\n/**\n * Options for a {@link SceneIngestion}.\n *\n * @category Data\n */\nexport type SceneIngestionOptions = {\n /**\n * The (pre-built, not-yet-started) agent to drive. `SceneIngestion` owns its start/stop; do not\n * start it yourself. Built by the caller so its attachment policy (mode, watch,\n * leave-on-condition) stays the caller's choice \u2014 `mode: \"join-all\"` for many sessions,\n * `mode: \"join-or-start\"` for a single shared session.\n */\n agent: Agent;\n\n /**\n * The mapping engine driving the scenes, built by the caller:\n *\n * ```typescript\n * pipeline: new IngestionPipeline({ mappings, onError })\n * ```\n *\n * Always the caller's to build, so it can be unit-tested on its own, shared between ingestions,\n * fed from somewhere else as well, and \u2014 the reason it is not sugar here \u2014 so its `onError`\n * always reaches the caller, whoever constructed it.\n *\n * **Errors split by layer**: the pipeline's own `onError` reports a mapping that throws or an\n * entity write that fails; this object's `on-error` event reports a source that fails to start\n * or an underlying agent error. Point both at the same handler for one channel.\n */\n pipeline: IngestionPipeline;\n\n /**\n * The upstream data sources, as {@link TransportSpec}s or factories.\n *\n * **Started lazily, when the first session becomes ready**, and shared by every session (one\n * subscription, one timeline). Until then \u2014 and again once every session is gone \u2014 nothing is\n * subscribed and events that would have arrived are simply not received; the pipeline counts\n * anything that does arrive with no scene bound under the `no_binding` drop reason.\n *\n * Optional: events can be pushed straight in with {@link SceneIngestion.ingest}, and any\n * transport can be pointed at the ingestion itself (it *is* a {@link EventSink}), in which\n * case you own that transport's lifecycle.\n */\n sources?: Array;\n\n /**\n * How often per second to advance the pipeline's continuous updates \u2014 the mappings that returned\n * a {@link continuous} update rather than a patch, because what they were told was a rate.\n *\n * Defaults to **twice** the agent's `headless_client.updates_per_second` (60 when it declares\n * none). Not once: the two timers free-run and beat against each other, so ticking at exactly\n * the flush rate lets the age of the sample at flush time wander across a whole flush window and\n * the motion jitters. Set it to `0` to run no clock at all and call\n * {@link IngestionPipeline.tick} yourself, from your own loop.\n *\n * The clock starts with the sources, on the first ready session, and stops again when the last\n * session goes \u2014 so a process with nothing bound is not left holding a timer. It costs nothing\n * while no mapping has installed a continuation.\n *\n * @throws RangeError unless it is `0` or a finite rate in the `(0, 125]` range \u2014 the same rule\n * `updates_per_second` follows, since both end up in a `setInterval`.\n */\n ticks_per_second?: number;\n};\n\n/**\n * Binds data sources to the scenes an {@link Agent} is attached to.\n *\n * It is the wiring layer, and only that: the mapping work lives in its {@link IngestionPipeline},\n * the attachment policy in its {@link Agent}. It binds each ready session's scene to the pipeline,\n * unbinds it when the session goes, and starts the shared sources on the first binding.\n *\n * It **is** a {@link EventSink}, so any transport \u2014 the bundled ones, or your own \u2014 can be\n * pointed straight at it, and events can be pushed in by hand with {@link ingest}:\n *\n * ```typescript\n * const ingestion = new SceneIngestion({\n * agent: new Agent({ config: { scene_id, token } }),\n * pipeline: new IngestionPipeline({ mappings, onError }),\n * sources: [{ kind: \"mqtt\", config: { broker_url, topics } }],\n * });\n * ingestion.addEventListener(\"on-error\", ({ error }) => report(error));\n * await ingestion.start();\n *\n * // ...or with no source at all, driven by whatever you like:\n * await ingestion.ingest({ channel: \"devices/42\", payload });\n *\n * await ingestion.stop();\n * ```\n *\n * The agent's session-lifecycle events are re-emitted here, so one object is enough to observe the\n * whole thing. An error nobody is listening for falls back to the console rather than vanishing.\n *\n * @category Data\n */\nexport class SceneIngestion extends ObservedEventTarget implements EventSink {\n /**\n * The agent whose sessions are driven.\n */\n readonly #agent: Agent;\n\n /**\n * The mapping engine every bound scene goes through.\n */\n readonly #pipeline: IngestionPipeline;\n\n /**\n * The upstream data sources, started lazily on the first bound session.\n */\n readonly #sources: Array;\n\n /**\n * The per-session pipeline bindings, keyed by session id.\n */\n readonly #bindings = new Map();\n\n /**\n * The started transports, published only once they have all successfully started.\n */\n #transports: Array = [];\n\n /**\n * The interval between two advances of the pipeline's continuous updates, in milliseconds;\n * `null` when the clock is switched off. Validated at construction, so nothing unusable \u2014 `NaN`\n * above all \u2014 can reach `setInterval`.\n */\n readonly #tick_interval_ms: number | null;\n\n /**\n * The clock advancing continuous updates, running while a session is bound.\n */\n #tick_interval: ReturnType | null = null;\n\n /**\n * When the clock last advanced, on a **monotonic** reading, so each tick reports the time it\n * actually covered. `performance.now()` and not `Date.now()`: an NTP step backwards would\n * otherwise hand every motion a negative elapsed time and rewind the whole scene, and a step\n * forwards would jump it.\n */\n #last_tick_ms = 0;\n\n /**\n * The advance currently in flight, or `null`. Ticks must not overlap: a resolution can take a\n * round trip (a `spawn`, a user `resolve` hitting a service), and two overlapping ticks can\n * apply their samples out of order \u2014 which also poisons {@link ComponentPatchApplier}'s dedup\n * memory, so the stale value is remembered as the last written and the next correct one skipped.\n */\n #tick_in_flight: Promise | null = null;\n\n /**\n * Elapsed time an overlapping tick could not deliver, folded into the next one so a motion runs\n * at the right speed under load rather than losing whatever the skipped ticks covered.\n */\n #carried_seconds = 0;\n\n /**\n * True while the sources are starting, so concurrent first-bindings share the one start.\n */\n #sources_starting = false;\n\n /**\n * True after `start()` and before `stop()`. Makes a second `start()` throw and a second (or\n * premature) `stop()` a no-op.\n */\n #started = false;\n\n /**\n * @throws RangeError if `ticks_per_second` is neither `0` nor a finite rate in `(0, 125]`.\n */\n constructor({ agent, pipeline, sources, ticks_per_second: requested_ticks_per_second }: SceneIngestionOptions) {\n super();\n\n this.#agent = agent;\n this.#pipeline = pipeline;\n this.#sources = sources ?? [];\n\n const ticks_per_second = requested_ticks_per_second ?? defaultTicksPerSecond(agent);\n this.#tick_interval_ms =\n ticks_per_second === 0 ? null : computeIntervalInMs({ name: \"ticks_per_second\", rate: ticks_per_second });\n }\n\n /**\n * The underlying agent. Its lifecycle events are re-emitted on this object, so reaching for it\n * is only needed to act on it (`join`, `leave`) \u2014 not to observe it.\n */\n get agent(): Agent {\n return this.#agent;\n }\n\n /**\n * The mapping engine. Push events straight into it, or read its {@link IngestionStats}.\n */\n get pipeline(): IngestionPipeline {\n return this.#pipeline;\n }\n\n /**\n * What the ingestion has actually done \u2014 events in, updates out, and why anything was dropped.\n * `null` when the pipeline was built with `stats: false`.\n */\n get stats(): IngestionStats | null {\n return this.#pipeline.stats;\n }\n\n /**\n * The number of sessions currently bound to the pipeline.\n */\n get boundSessionCount(): number {\n return this.#bindings.size;\n }\n\n /**\n * Push one event through the pipeline, into every bound session's scene.\n *\n * This is both the {@link EventSink} implementation \u2014 which is how the configured sources feed\n * it \u2014 and the direct entry point for events that come from anywhere else: a webhook, a test, a\n * replay tool, a \"send one frame\" debug control.\n */\n async ingest(event: IngestEvent): Promise {\n // Settle the motions up to *now* before the event gets to replace any of them. Otherwise the\n // slice between the last tick and this event is credited to whatever the event installs, at\n // its new rate, instead of to the rate that was actually in force during it \u2014 a sub-tick\n // misattribution paid once per event, which a rate that keeps changing turns into a\n // persistent lead. Costs nothing while nothing is moving, and this is the one layer that\n // owns both the clock and the events, so the split can be made exact.\n if (this.#tick_interval !== null && this.#pipeline.continuationCount > 0) {\n await this.#advance();\n }\n await this.#pipeline.ingest(event);\n }\n\n /**\n * Attach the session-lifecycle wiring and start the agent. The sources start lazily on the\n * first ready session.\n *\n * @throws If already started, or if the agent fails to start.\n */\n async start(): Promise {\n if (this.#started) {\n throw new Error(\"SceneIngestion is already started.\");\n }\n this.#started = true;\n\n this.#agent.addEventListener(\"on-session-created\", this.#onSessionCreated);\n this.#agent.addEventListener(\"on-session-joined\", this.#onSessionJoined);\n this.#agent.addEventListener(\"on-session-ready\", this.#onSessionReady);\n this.#agent.addEventListener(\"on-session-left\", this.#onSessionLeft);\n this.#agent.addEventListener(\"on-stopped\", this.#onAgentStopped);\n this.#agent.addEventListener(\"on-error\", this.#onAgentError);\n\n await this.#agent.start();\n }\n\n /**\n * Stop the sources, then stop the agent (leaving all sessions). A no-op when not started.\n */\n async stop(): Promise {\n if (!this.#started) {\n return;\n }\n // Cleared first, before any await: a source start still in flight must be able to see the\n // stop and close itself instead of publishing a connection nobody will ever close.\n this.#started = false;\n\n this.#agent.removeEventListener(\"on-session-created\", this.#onSessionCreated);\n this.#agent.removeEventListener(\"on-session-joined\", this.#onSessionJoined);\n this.#agent.removeEventListener(\"on-session-ready\", this.#onSessionReady);\n this.#agent.removeEventListener(\"on-session-left\", this.#onSessionLeft);\n this.#agent.removeEventListener(\"on-stopped\", this.#onAgentStopped);\n this.#agent.removeEventListener(\"on-error\", this.#onAgentError);\n\n this.#stopClock();\n // The sources are going: whatever rate a mapping was last told is now unconfirmed, and this\n // is the closest thing the SDK has to \"the data stopped\". Leaving the motions installed\n // would have them resume on that stale rate if this ingestion is ever started again.\n this.#pipeline.clearContinuations();\n\n const transports = this.#transports;\n this.#transports = [];\n try {\n await Promise.all(transports.map(transport => transport.stop()));\n } finally {\n try {\n await this.#agent.stop();\n } finally {\n this.#pipeline.unbindAll();\n this.#bindings.clear();\n }\n }\n }\n\n //--------------------------------------------------------------------------\n // Agent lifecycle. Each event is re-emitted as a fresh instance: an Event object that is being\n // dispatched cannot be dispatched again.\n\n #onSessionCreated = (event: SessionCreatedEvent): void => {\n this._dispatchEvent(new SessionCreatedEvent({ livelink: event.livelink }));\n };\n\n #onSessionJoined = (event: SessionJoinedEvent): void => {\n this._dispatchEvent(new SessionJoinedEvent({ livelink: event.livelink }));\n };\n\n #onSessionReady = (event: SessionReadyEvent): void => {\n this._dispatchEvent(new SessionReadyEvent({ livelink: event.livelink }));\n this.#bindSession(event.livelink);\n };\n\n #onSessionLeft = (event: SessionLeftEvent): void => {\n this.#unbindSession(event.livelink);\n this._dispatchEvent(new SessionLeftEvent({ livelink: event.livelink, reason: event.reason }));\n };\n\n // The agent is done, either by its own decision or because someone stopped it directly. Nothing\n // will bind another session, so the sources have to go too: a broker connection or a playback\n // timer left running holds a Node process open with no session left to drive.\n // Our own stop() detaches this listener before stopping the agent, so it never re-enters.\n #onAgentStopped = (event: AgentStoppedEvent): void => {\n this._dispatchEvent(new AgentStoppedEvent({ is_automatic: event.is_automatic }));\n void this.stop().catch((error: Error) => this.#reportError(error));\n };\n\n #onAgentError = (event: AgentErrorEvent): void => {\n this.#reportError(event.error);\n };\n\n //--------------------------------------------------------------------------\n\n /**\n * Bind a ready session's scene to the pipeline, and ensure the shared sources run.\n */\n async #bindSession(livelink: Livelink): Promise {\n const session_id = livelink.session.session_id;\n if (this.#bindings.has(session_id)) {\n return;\n }\n\n const binding = this.#pipeline.bind({ scene: livelink.scene });\n this.#bindings.set(session_id, { binding, livelink });\n this._dispatchEvent(new SessionBoundEvent({ livelink }));\n\n this.#startClock();\n await this.#ensureSourcesStarted();\n }\n\n /**\n * Start the clock advancing continuous updates, on the first bound session. Idempotent, and a\n * no-op when the clock is switched off.\n */\n #startClock(): void {\n if (this.#tick_interval !== null || this.#tick_interval_ms === null) {\n return;\n }\n this.#last_tick_ms = performance.now();\n this.#carried_seconds = 0;\n this.#tick_interval = setInterval(() => void this.#advance(), this.#tick_interval_ms);\n }\n\n /**\n * Stop the clock. Safe to call when it never started.\n */\n #stopClock(): void {\n if (this.#tick_interval === null) {\n return;\n }\n clearInterval(this.#tick_interval);\n this.#tick_interval = null;\n }\n\n /**\n * Advance the pipeline's continuous updates by the time since the last advance.\n *\n * @returns The advance that will cover this call's elapsed time \u2014 the one it started, or the one\n * already in flight that this call folded its time into.\n */\n #advance(): Promise {\n const now_ms = performance.now();\n this.#carried_seconds += Math.min((now_ms - this.#last_tick_ms) / 1000, MAX_TICK_SECONDS);\n this.#last_tick_ms = now_ms;\n\n // Already advancing: the time just measured is kept rather than dropped, and the advance in\n // flight is what the caller waits on. Nothing is lost and nothing is applied out of order.\n if (this.#tick_in_flight !== null) {\n return this.#tick_in_flight;\n }\n\n const seconds = this.#carried_seconds;\n this.#carried_seconds = 0;\n // `tick` never throws; it reports to the pipeline's own `onError`.\n const running = this.#pipeline.tick(seconds).finally(() => {\n if (this.#tick_in_flight === running) {\n this.#tick_in_flight = null;\n }\n });\n this.#tick_in_flight = running;\n return running;\n }\n\n /**\n * Unbind a session's scene, releasing its resolvers.\n */\n #unbindSession(livelink: Livelink): void {\n const session_id = livelink.session.session_id;\n const bound = this.#bindings.get(session_id);\n if (!bound) {\n return;\n }\n this.#bindings.delete(session_id);\n bound.binding.unbind();\n\n // Nothing left to drive: a timer firing thirty times a second into an empty pipeline keeps\n // `ticks_processed` climbing and keeps a Node process from idling. `#bindSession` starts it\n // again on the next ready session.\n if (this.#bindings.size === 0) {\n this.#stopClock();\n }\n\n this._dispatchEvent(new SessionUnboundEvent({ livelink }));\n }\n\n /**\n * Start the shared sources on the first binding. Concurrent first-bindings share the one start.\n *\n * A failed start is reported and leaves `#transports` empty, so the next session to bind retries\n * it \u2014 a broker that is down when the first session comes up does not disable the ingestion for\n * good. (Nothing retries on its own while the bound sessions are unchanged.)\n */\n async #ensureSourcesStarted(): Promise {\n if (this.#sources.length === 0 || this.#transports.length > 0 || this.#sources_starting) {\n return;\n }\n this.#sources_starting = true;\n\n const started: Array = [];\n try {\n for (const source of this.#sources) {\n const transport =\n typeof source === \"function\" ? await source(this) : await createTransport(source, this);\n await transport.start();\n started.push(transport);\n }\n\n // `stop()` may have landed while these were being built or started: it saw an empty\n // `#transports` and had nothing to stop, so close them here rather than leak live broker\n // connections (which would also keep a Node process alive).\n if (!this.#started) {\n await Promise.all(started.map(transport => transport.stop()));\n return;\n }\n\n // Published only once every source started, so a failure above leaves the field empty.\n this.#transports = started;\n this._dispatchEvent(new IngestionRunningEvent());\n } catch (error) {\n await Promise.all(started.map(transport => transport.stop().catch(() => {})));\n this.#reportError(error as Error);\n } finally {\n this.#sources_starting = false;\n }\n }\n\n /**\n * Emit an error, falling back to the console when nobody is listening \u2014 an ingestion failing\n * silently is the one outcome worth avoiding.\n */\n #reportError(error: Error): void {\n if (!this._hasListeners(\"on-error\")) {\n console.error(\"[scene-ingestion]\", error);\n }\n this._dispatchEvent(new IngestionErrorEvent({ error }));\n }\n}\n"], "mappings": 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