super-ecs/dist/super-ecs.umd.js

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    typeof define === 'function' && define.amd ? define(['exports'], factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.superECS = {}));
}(this, (function (exports) { 'use strict';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */
    /* global Reflect, Promise */

    var extendStatics = function(d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };

    function __extends(d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    }

    function __awaiter(thisArg, _arguments, P, generator) {
        function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
        return new (P || (P = Promise))(function (resolve, reject) {
            function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
            function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
            function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
            step((generator = generator.apply(thisArg, _arguments || [])).next());
        });
    }

    function __generator(thisArg, body) {
        var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
        return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
        function verb(n) { return function (v) { return step([n, v]); }; }
        function step(op) {
            if (f) throw new TypeError("Generator is already executing.");
            while (_) try {
                if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
                if (y = 0, t) op = [op[0] & 2, t.value];
                switch (op[0]) {
                    case 0: case 1: t = op; break;
                    case 4: _.label++; return { value: op[1], done: false };
                    case 5: _.label++; y = op[1]; op = [0]; continue;
                    case 7: op = _.ops.pop(); _.trys.pop(); continue;
                    default:
                        if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                        if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                        if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                        if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                        if (t[2]) _.ops.pop();
                        _.trys.pop(); continue;
                }
                op = body.call(thisArg, _);
            } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
            if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
        }
    }

    function __values(o) {
        var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
        if (m) return m.call(o);
        if (o && typeof o.length === "number") return {
            next: function () {
                if (o && i >= o.length) o = void 0;
                return { value: o && o[i++], done: !o };
            }
        };
        throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
    }

    function __read(o, n) {
        var m = typeof Symbol === "function" && o[Symbol.iterator];
        if (!m) return o;
        var i = m.call(o), r, ar = [], e;
        try {
            while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
        }
        catch (error) { e = { error: error }; }
        finally {
            try {
                if (r && !r.done && (m = i["return"])) m.call(i);
            }
            finally { if (e) throw e.error; }
        }
        return ar;
    }

    function __spreadArray(to, from) {
        for (var i = 0, il = from.length, j = to.length; i < il; i++, j++)
            to[j] = from[i];
        return to;
    }

    function __await(v) {
        return this instanceof __await ? (this.v = v, this) : new __await(v);
    }

    function __asyncGenerator(thisArg, _arguments, generator) {
        if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
        var g = generator.apply(thisArg, _arguments || []), i, q = [];
        return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
        function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
        function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
        function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
        function fulfill(value) { resume("next", value); }
        function reject(value) { resume("throw", value); }
        function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
    }

    function __asyncValues(o) {
        if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
        var m = o[Symbol.asyncIterator], i;
        return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
        function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
        function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
    }

    function isFunction(value) {
        return typeof value === 'function';
    }

    function createErrorClass(createImpl) {
        var _super = function (instance) {
            Error.call(instance);
            instance.stack = new Error().stack;
        };
        var ctorFunc = createImpl(_super);
        ctorFunc.prototype = Object.create(Error.prototype);
        ctorFunc.prototype.constructor = ctorFunc;
        return ctorFunc;
    }

    var UnsubscriptionError = createErrorClass(function (_super) {
        return function UnsubscriptionErrorImpl(errors) {
            _super(this);
            this.message = errors
                ? errors.length + " errors occurred during unsubscription:\n" + errors.map(function (err, i) { return i + 1 + ") " + err.toString(); }).join('\n  ')
                : '';
            this.name = 'UnsubscriptionError';
            this.errors = errors;
        };
    });

    function arrRemove(arr, item) {
        if (arr) {
            var index = arr.indexOf(item);
            0 <= index && arr.splice(index, 1);
        }
    }

    var Subscription = (function () {
        function Subscription(initialTeardown) {
            this.initialTeardown = initialTeardown;
            this.closed = false;
            this._parentage = null;
            this._teardowns = null;
        }
        Subscription.prototype.unsubscribe = function () {
            var e_1, _a, e_2, _b;
            var errors;
            if (!this.closed) {
                this.closed = true;
                var _parentage = this._parentage;
                if (_parentage) {
                    this._parentage = null;
                    if (Array.isArray(_parentage)) {
                        try {
                            for (var _parentage_1 = __values(_parentage), _parentage_1_1 = _parentage_1.next(); !_parentage_1_1.done; _parentage_1_1 = _parentage_1.next()) {
                                var parent_1 = _parentage_1_1.value;
                                parent_1.remove(this);
                            }
                        }
                        catch (e_1_1) { e_1 = { error: e_1_1 }; }
                        finally {
                            try {
                                if (_parentage_1_1 && !_parentage_1_1.done && (_a = _parentage_1.return)) _a.call(_parentage_1);
                            }
                            finally { if (e_1) throw e_1.error; }
                        }
                    }
                    else {
                        _parentage.remove(this);
                    }
                }
                var initialTeardown = this.initialTeardown;
                if (isFunction(initialTeardown)) {
                    try {
                        initialTeardown();
                    }
                    catch (e) {
                        errors = e instanceof UnsubscriptionError ? e.errors : [e];
                    }
                }
                var _teardowns = this._teardowns;
                if (_teardowns) {
                    this._teardowns = null;
                    try {
                        for (var _teardowns_1 = __values(_teardowns), _teardowns_1_1 = _teardowns_1.next(); !_teardowns_1_1.done; _teardowns_1_1 = _teardowns_1.next()) {
                            var teardown_1 = _teardowns_1_1.value;
                            try {
                                execTeardown(teardown_1);
                            }
                            catch (err) {
                                errors = errors !== null && errors !== void 0 ? errors : [];
                                if (err instanceof UnsubscriptionError) {
                                    errors = __spreadArray(__spreadArray([], __read(errors)), __read(err.errors));
                                }
                                else {
                                    errors.push(err);
                                }
                            }
                        }
                    }
                    catch (e_2_1) { e_2 = { error: e_2_1 }; }
                    finally {
                        try {
                            if (_teardowns_1_1 && !_teardowns_1_1.done && (_b = _teardowns_1.return)) _b.call(_teardowns_1);
                        }
                        finally { if (e_2) throw e_2.error; }
                    }
                }
                if (errors) {
                    throw new UnsubscriptionError(errors);
                }
            }
        };
        Subscription.prototype.add = function (teardown) {
            var _a;
            if (teardown && teardown !== this) {
                if (this.closed) {
                    execTeardown(teardown);
                }
                else {
                    if (teardown instanceof Subscription) {
                        if (teardown.closed || teardown._hasParent(this)) {
                            return;
                        }
                        teardown._addParent(this);
                    }
                    (this._teardowns = (_a = this._teardowns) !== null && _a !== void 0 ? _a : []).push(teardown);
                }
            }
        };
        Subscription.prototype._hasParent = function (parent) {
            var _parentage = this._parentage;
            return _parentage === parent || (Array.isArray(_parentage) && _parentage.includes(parent));
        };
        Subscription.prototype._addParent = function (parent) {
            var _parentage = this._parentage;
            this._parentage = Array.isArray(_parentage) ? (_parentage.push(parent), _parentage) : _parentage ? [_parentage, parent] : parent;
        };
        Subscription.prototype._removeParent = function (parent) {
            var _parentage = this._parentage;
            if (_parentage === parent) {
                this._parentage = null;
            }
            else if (Array.isArray(_parentage)) {
                arrRemove(_parentage, parent);
            }
        };
        Subscription.prototype.remove = function (teardown) {
            var _teardowns = this._teardowns;
            _teardowns && arrRemove(_teardowns, teardown);
            if (teardown instanceof Subscription) {
                teardown._removeParent(this);
            }
        };
        Subscription.EMPTY = (function () {
            var empty = new Subscription();
            empty.closed = true;
            return empty;
        })();
        return Subscription;
    }());
    var EMPTY_SUBSCRIPTION = Subscription.EMPTY;
    function isSubscription(value) {
        return (value instanceof Subscription ||
            (value && 'closed' in value && isFunction(value.remove) && isFunction(value.add) && isFunction(value.unsubscribe)));
    }
    function execTeardown(teardown) {
        if (isFunction(teardown)) {
            teardown();
        }
        else {
            teardown.unsubscribe();
        }
    }

    var config = {
        onUnhandledError: null,
        onStoppedNotification: null,
        Promise: undefined,
        useDeprecatedSynchronousErrorHandling: false,
        useDeprecatedNextContext: false,
    };

    var timeoutProvider = {
        setTimeout: function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            return (setTimeout).apply(void 0, __spreadArray([], __read(args)));
        },
        clearTimeout: function (handle) {
            return (clearTimeout)(handle);
        },
        delegate: undefined,
    };

    function reportUnhandledError(err) {
        timeoutProvider.setTimeout(function () {
            {
                throw err;
            }
        });
    }

    function noop() { }

    function errorContext(cb) {
        {
            cb();
        }
    }

    var Subscriber = (function (_super) {
        __extends(Subscriber, _super);
        function Subscriber(destination) {
            var _this = _super.call(this) || this;
            _this.isStopped = false;
            if (destination) {
                _this.destination = destination;
                if (isSubscription(destination)) {
                    destination.add(_this);
                }
            }
            else {
                _this.destination = EMPTY_OBSERVER;
            }
            return _this;
        }
        Subscriber.create = function (next, error, complete) {
            return new SafeSubscriber(next, error, complete);
        };
        Subscriber.prototype.next = function (value) {
            if (this.isStopped) ;
            else {
                this._next(value);
            }
        };
        Subscriber.prototype.error = function (err) {
            if (this.isStopped) ;
            else {
                this.isStopped = true;
                this._error(err);
            }
        };
        Subscriber.prototype.complete = function () {
            if (this.isStopped) ;
            else {
                this.isStopped = true;
                this._complete();
            }
        };
        Subscriber.prototype.unsubscribe = function () {
            if (!this.closed) {
                this.isStopped = true;
                _super.prototype.unsubscribe.call(this);
                this.destination = null;
            }
        };
        Subscriber.prototype._next = function (value) {
            this.destination.next(value);
        };
        Subscriber.prototype._error = function (err) {
            try {
                this.destination.error(err);
            }
            finally {
                this.unsubscribe();
            }
        };
        Subscriber.prototype._complete = function () {
            try {
                this.destination.complete();
            }
            finally {
                this.unsubscribe();
            }
        };
        return Subscriber;
    }(Subscription));
    var _bind = Function.prototype.bind;
    function bind(fn, thisArg) {
        return _bind.call(fn, thisArg);
    }
    var ConsumerObserver = (function () {
        function ConsumerObserver(partialObserver) {
            this.partialObserver = partialObserver;
        }
        ConsumerObserver.prototype.next = function (value) {
            var partialObserver = this.partialObserver;
            if (partialObserver.next) {
                try {
                    partialObserver.next(value);
                }
                catch (error) {
                    handleUnhandledError(error);
                }
            }
        };
        ConsumerObserver.prototype.error = function (err) {
            var partialObserver = this.partialObserver;
            if (partialObserver.error) {
                try {
                    partialObserver.error(err);
                }
                catch (error) {
                    handleUnhandledError(error);
                }
            }
            else {
                handleUnhandledError(err);
            }
        };
        ConsumerObserver.prototype.complete = function () {
            var partialObserver = this.partialObserver;
            if (partialObserver.complete) {
                try {
                    partialObserver.complete();
                }
                catch (error) {
                    handleUnhandledError(error);
                }
            }
        };
        return ConsumerObserver;
    }());
    var SafeSubscriber = (function (_super) {
        __extends(SafeSubscriber, _super);
        function SafeSubscriber(observerOrNext, error, complete) {
            var _this = _super.call(this) || this;
            var partialObserver;
            if (isFunction(observerOrNext) || !observerOrNext) {
                partialObserver = {
                    next: observerOrNext !== null && observerOrNext !== void 0 ? observerOrNext : undefined,
                    error: error !== null && error !== void 0 ? error : undefined,
                    complete: complete !== null && complete !== void 0 ? complete : undefined,
                };
            }
            else {
                var context_1;
                if (_this && config.useDeprecatedNextContext) {
                    context_1 = Object.create(observerOrNext);
                    context_1.unsubscribe = function () { return _this.unsubscribe(); };
                    partialObserver = {
                        next: observerOrNext.next && bind(observerOrNext.next, context_1),
                        error: observerOrNext.error && bind(observerOrNext.error, context_1),
                        complete: observerOrNext.complete && bind(observerOrNext.complete, context_1),
                    };
                }
                else {
                    partialObserver = observerOrNext;
                }
            }
            _this.destination = new ConsumerObserver(partialObserver);
            return _this;
        }
        return SafeSubscriber;
    }(Subscriber));
    function handleUnhandledError(error) {
        {
            reportUnhandledError(error);
        }
    }
    function defaultErrorHandler(err) {
        throw err;
    }
    var EMPTY_OBSERVER = {
        closed: true,
        next: noop,
        error: defaultErrorHandler,
        complete: noop,
    };

    var observable = (function () { return (typeof Symbol === 'function' && Symbol.observable) || '@@observable'; })();

    function identity(x) {
        return x;
    }

    function pipeFromArray(fns) {
        if (fns.length === 0) {
            return identity;
        }
        if (fns.length === 1) {
            return fns[0];
        }
        return function piped(input) {
            return fns.reduce(function (prev, fn) { return fn(prev); }, input);
        };
    }

    var Observable = (function () {
        function Observable(subscribe) {
            if (subscribe) {
                this._subscribe = subscribe;
            }
        }
        Observable.prototype.lift = function (operator) {
            var observable = new Observable();
            observable.source = this;
            observable.operator = operator;
            return observable;
        };
        Observable.prototype.subscribe = function (observerOrNext, error, complete) {
            var _this = this;
            var subscriber = isSubscriber(observerOrNext) ? observerOrNext : new SafeSubscriber(observerOrNext, error, complete);
            errorContext(function () {
                var _a = _this, operator = _a.operator, source = _a.source;
                subscriber.add(operator
                    ?
                        operator.call(subscriber, source)
                    : source
                        ?
                            _this._subscribe(subscriber)
                        :
                            _this._trySubscribe(subscriber));
            });
            return subscriber;
        };
        Observable.prototype._trySubscribe = function (sink) {
            try {
                return this._subscribe(sink);
            }
            catch (err) {
                sink.error(err);
            }
        };
        Observable.prototype.forEach = function (next, promiseCtor) {
            var _this = this;
            promiseCtor = getPromiseCtor(promiseCtor);
            return new promiseCtor(function (resolve, reject) {
                var subscriber = new SafeSubscriber({
                    next: function (value) {
                        try {
                            next(value);
                        }
                        catch (err) {
                            reject(err);
                            subscriber.unsubscribe();
                        }
                    },
                    error: reject,
                    complete: resolve,
                });
                _this.subscribe(subscriber);
            });
        };
        Observable.prototype._subscribe = function (subscriber) {
            var _a;
            return (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber);
        };
        Observable.prototype[observable] = function () {
            return this;
        };
        Observable.prototype.pipe = function () {
            var operations = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                operations[_i] = arguments[_i];
            }
            return pipeFromArray(operations)(this);
        };
        Observable.prototype.toPromise = function (promiseCtor) {
            var _this = this;
            promiseCtor = getPromiseCtor(promiseCtor);
            return new promiseCtor(function (resolve, reject) {
                var value;
                _this.subscribe(function (x) { return (value = x); }, function (err) { return reject(err); }, function () { return resolve(value); });
            });
        };
        Observable.create = function (subscribe) {
            return new Observable(subscribe);
        };
        return Observable;
    }());
    function getPromiseCtor(promiseCtor) {
        var _a;
        return (_a = promiseCtor !== null && promiseCtor !== void 0 ? promiseCtor : config.Promise) !== null && _a !== void 0 ? _a : Promise;
    }
    function isObserver(value) {
        return value && isFunction(value.next) && isFunction(value.error) && isFunction(value.complete);
    }
    function isSubscriber(value) {
        return (value && value instanceof Subscriber) || (isObserver(value) && isSubscription(value));
    }

    function hasLift(source) {
        return isFunction(source === null || source === void 0 ? void 0 : source.lift);
    }
    function operate(init) {
        return function (source) {
            if (hasLift(source)) {
                return source.lift(function (liftedSource) {
                    try {
                        return init(liftedSource, this);
                    }
                    catch (err) {
                        this.error(err);
                    }
                });
            }
            throw new TypeError('Unable to lift unknown Observable type');
        };
    }

    function createOperatorSubscriber(destination, onNext, onComplete, onError, onFinalize) {
        return new OperatorSubscriber(destination, onNext, onComplete, onError, onFinalize);
    }
    var OperatorSubscriber = (function (_super) {
        __extends(OperatorSubscriber, _super);
        function OperatorSubscriber(destination, onNext, onComplete, onError, onFinalize, shouldUnsubscribe) {
            var _this = _super.call(this, destination) || this;
            _this.onFinalize = onFinalize;
            _this.shouldUnsubscribe = shouldUnsubscribe;
            _this._next = onNext
                ? function (value) {
                    try {
                        onNext(value);
                    }
                    catch (err) {
                        destination.error(err);
                    }
                }
                : _super.prototype._next;
            _this._error = onError
                ? function (err) {
                    try {
                        onError(err);
                    }
                    catch (err) {
                        destination.error(err);
                    }
                    finally {
                        this.unsubscribe();
                    }
                }
                : _super.prototype._error;
            _this._complete = onComplete
                ? function () {
                    try {
                        onComplete();
                    }
                    catch (err) {
                        destination.error(err);
                    }
                    finally {
                        this.unsubscribe();
                    }
                }
                : _super.prototype._complete;
            return _this;
        }
        OperatorSubscriber.prototype.unsubscribe = function () {
            var _a;
            if (!this.shouldUnsubscribe || this.shouldUnsubscribe()) {
                var closed_1 = this.closed;
                _super.prototype.unsubscribe.call(this);
                !closed_1 && ((_a = this.onFinalize) === null || _a === void 0 ? void 0 : _a.call(this));
            }
        };
        return OperatorSubscriber;
    }(Subscriber));

    var ObjectUnsubscribedError = createErrorClass(function (_super) {
        return function ObjectUnsubscribedErrorImpl() {
            _super(this);
            this.name = 'ObjectUnsubscribedError';
            this.message = 'object unsubscribed';
        };
    });

    var Subject = (function (_super) {
        __extends(Subject, _super);
        function Subject() {
            var _this = _super.call(this) || this;
            _this.closed = false;
            _this.observers = [];
            _this.isStopped = false;
            _this.hasError = false;
            _this.thrownError = null;
            return _this;
        }
        Subject.prototype.lift = function (operator) {
            var subject = new AnonymousSubject(this, this);
            subject.operator = operator;
            return subject;
        };
        Subject.prototype._throwIfClosed = function () {
            if (this.closed) {
                throw new ObjectUnsubscribedError();
            }
        };
        Subject.prototype.next = function (value) {
            var _this = this;
            errorContext(function () {
                var e_1, _a;
                _this._throwIfClosed();
                if (!_this.isStopped) {
                    var copy = _this.observers.slice();
                    try {
                        for (var copy_1 = __values(copy), copy_1_1 = copy_1.next(); !copy_1_1.done; copy_1_1 = copy_1.next()) {
                            var observer = copy_1_1.value;
                            observer.next(value);
                        }
                    }
                    catch (e_1_1) { e_1 = { error: e_1_1 }; }
                    finally {
                        try {
                            if (copy_1_1 && !copy_1_1.done && (_a = copy_1.return)) _a.call(copy_1);
                        }
                        finally { if (e_1) throw e_1.error; }
                    }
                }
            });
        };
        Subject.prototype.error = function (err) {
            var _this = this;
            errorContext(function () {
                _this._throwIfClosed();
                if (!_this.isStopped) {
                    _this.hasError = _this.isStopped = true;
                    _this.thrownError = err;
                    var observers = _this.observers;
                    while (observers.length) {
                        observers.shift().error(err);
                    }
                }
            });
        };
        Subject.prototype.complete = function () {
            var _this = this;
            errorContext(function () {
                _this._throwIfClosed();
                if (!_this.isStopped) {
                    _this.isStopped = true;
                    var observers = _this.observers;
                    while (observers.length) {
                        observers.shift().complete();
                    }
                }
            });
        };
        Subject.prototype.unsubscribe = function () {
            this.isStopped = this.closed = true;
            this.observers = null;
        };
        Object.defineProperty(Subject.prototype, "observed", {
            get: function () {
                var _a;
                return ((_a = this.observers) === null || _a === void 0 ? void 0 : _a.length) > 0;
            },
            enumerable: false,
            configurable: true
        });
        Subject.prototype._trySubscribe = function (subscriber) {
            this._throwIfClosed();
            return _super.prototype._trySubscribe.call(this, subscriber);
        };
        Subject.prototype._subscribe = function (subscriber) {
            this._throwIfClosed();
            this._checkFinalizedStatuses(subscriber);
            return this._innerSubscribe(subscriber);
        };
        Subject.prototype._innerSubscribe = function (subscriber) {
            var _a = this, hasError = _a.hasError, isStopped = _a.isStopped, observers = _a.observers;
            return hasError || isStopped
                ? EMPTY_SUBSCRIPTION
                : (observers.push(subscriber), new Subscription(function () { return arrRemove(observers, subscriber); }));
        };
        Subject.prototype._checkFinalizedStatuses = function (subscriber) {
            var _a = this, hasError = _a.hasError, thrownError = _a.thrownError, isStopped = _a.isStopped;
            if (hasError) {
                subscriber.error(thrownError);
            }
            else if (isStopped) {
                subscriber.complete();
            }
        };
        Subject.prototype.asObservable = function () {
            var observable = new Observable();
            observable.source = this;
            return observable;
        };
        Subject.create = function (destination, source) {
            return new AnonymousSubject(destination, source);
        };
        return Subject;
    }(Observable));
    var AnonymousSubject = (function (_super) {
        __extends(AnonymousSubject, _super);
        function AnonymousSubject(destination, source) {
            var _this = _super.call(this) || this;
            _this.destination = destination;
            _this.source = source;
            return _this;
        }
        AnonymousSubject.prototype.next = function (value) {
            var _a, _b;
            (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.next) === null || _b === void 0 ? void 0 : _b.call(_a, value);
        };
        AnonymousSubject.prototype.error = function (err) {
            var _a, _b;
            (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.error) === null || _b === void 0 ? void 0 : _b.call(_a, err);
        };
        AnonymousSubject.prototype.complete = function () {
            var _a, _b;
            (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.complete) === null || _b === void 0 ? void 0 : _b.call(_a);
        };
        AnonymousSubject.prototype._subscribe = function (subscriber) {
            var _a, _b;
            return (_b = (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber)) !== null && _b !== void 0 ? _b : EMPTY_SUBSCRIPTION;
        };
        return AnonymousSubject;
    }(Subject));

    var isArrayLike = (function (x) { return x && typeof x.length === 'number' && typeof x !== 'function'; });

    function isPromise(value) {
        return isFunction(value === null || value === void 0 ? void 0 : value.then);
    }

    function isInteropObservable(input) {
        return isFunction(input[observable]);
    }

    function isAsyncIterable(obj) {
        return Symbol.asyncIterator && isFunction(obj === null || obj === void 0 ? void 0 : obj[Symbol.asyncIterator]);
    }

    function createInvalidObservableTypeError(input) {
        return new TypeError("You provided " + (input !== null && typeof input === 'object' ? 'an invalid object' : "'" + input + "'") + " where a stream was expected. You can provide an Observable, Promise, ReadableStream, Array, AsyncIterable, or Iterable.");
    }

    function getSymbolIterator() {
        if (typeof Symbol !== 'function' || !Symbol.iterator) {
            return '@@iterator';
        }
        return Symbol.iterator;
    }
    var iterator = getSymbolIterator();

    function isIterable(input) {
        return isFunction(input === null || input === void 0 ? void 0 : input[iterator]);
    }

    function readableStreamLikeToAsyncGenerator(readableStream) {
        return __asyncGenerator(this, arguments, function readableStreamLikeToAsyncGenerator_1() {
            var reader, _a, value, done;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        reader = readableStream.getReader();
                        _b.label = 1;
                    case 1:
                        _b.trys.push([1, , 9, 10]);
                        _b.label = 2;
                    case 2:
                        return [4, __await(reader.read())];
                    case 3:
                        _a = _b.sent(), value = _a.value, done = _a.done;
                        if (!done) return [3, 5];
                        return [4, __await(void 0)];
                    case 4: return [2, _b.sent()];
                    case 5: return [4, __await(value)];
                    case 6: return [4, _b.sent()];
                    case 7:
                        _b.sent();
                        return [3, 2];
                    case 8: return [3, 10];
                    case 9:
                        reader.releaseLock();
                        return [7];
                    case 10: return [2];
                }
            });
        });
    }
    function isReadableStreamLike(obj) {
        return isFunction(obj === null || obj === void 0 ? void 0 : obj.getReader);
    }

    function innerFrom(input) {
        if (input instanceof Observable) {
            return input;
        }
        if (input != null) {
            if (isInteropObservable(input)) {
                return fromInteropObservable(input);
            }
            if (isArrayLike(input)) {
                return fromArrayLike(input);
            }
            if (isPromise(input)) {
                return fromPromise(input);
            }
            if (isAsyncIterable(input)) {
                return fromAsyncIterable(input);
            }
            if (isIterable(input)) {
                return fromIterable(input);
            }
            if (isReadableStreamLike(input)) {
                return fromReadableStreamLike(input);
            }
        }
        throw createInvalidObservableTypeError(input);
    }
    function fromInteropObservable(obj) {
        return new Observable(function (subscriber) {
            var obs = obj[observable]();
            if (isFunction(obs.subscribe)) {
                return obs.subscribe(subscriber);
            }
            throw new TypeError('Provided object does not correctly implement Symbol.observable');
        });
    }
    function fromArrayLike(array) {
        return new Observable(function (subscriber) {
            for (var i = 0; i < array.length && !subscriber.closed; i++) {
                subscriber.next(array[i]);
            }
            subscriber.complete();
        });
    }
    function fromPromise(promise) {
        return new Observable(function (subscriber) {
            promise
                .then(function (value) {
                if (!subscriber.closed) {
                    subscriber.next(value);
                    subscriber.complete();
                }
            }, function (err) { return subscriber.error(err); })
                .then(null, reportUnhandledError);
        });
    }
    function fromIterable(iterable) {
        return new Observable(function (subscriber) {
            var e_1, _a;
            try {
                for (var iterable_1 = __values(iterable), iterable_1_1 = iterable_1.next(); !iterable_1_1.done; iterable_1_1 = iterable_1.next()) {
                    var value = iterable_1_1.value;
                    subscriber.next(value);
                    if (subscriber.closed) {
                        return;
                    }
                }
            }
            catch (e_1_1) { e_1 = { error: e_1_1 }; }
            finally {
                try {
                    if (iterable_1_1 && !iterable_1_1.done && (_a = iterable_1.return)) _a.call(iterable_1);
                }
                finally { if (e_1) throw e_1.error; }
            }
            subscriber.complete();
        });
    }
    function fromAsyncIterable(asyncIterable) {
        return new Observable(function (subscriber) {
            process(asyncIterable, subscriber).catch(function (err) { return subscriber.error(err); });
        });
    }
    function fromReadableStreamLike(readableStream) {
        return fromAsyncIterable(readableStreamLikeToAsyncGenerator(readableStream));
    }
    function process(asyncIterable, subscriber) {
        var asyncIterable_1, asyncIterable_1_1;
        var e_2, _a;
        return __awaiter(this, void 0, void 0, function () {
            var value, e_2_1;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        _b.trys.push([0, 5, 6, 11]);
                        asyncIterable_1 = __asyncValues(asyncIterable);
                        _b.label = 1;
                    case 1: return [4, asyncIterable_1.next()];
                    case 2:
                        if (!(asyncIterable_1_1 = _b.sent(), !asyncIterable_1_1.done)) return [3, 4];
                        value = asyncIterable_1_1.value;
                        subscriber.next(value);
                        if (subscriber.closed) {
                            return [2];
                        }
                        _b.label = 3;
                    case 3: return [3, 1];
                    case 4: return [3, 11];
                    case 5:
                        e_2_1 = _b.sent();
                        e_2 = { error: e_2_1 };
                        return [3, 11];
                    case 6:
                        _b.trys.push([6, , 9, 10]);
                        if (!(asyncIterable_1_1 && !asyncIterable_1_1.done && (_a = asyncIterable_1.return))) return [3, 8];
                        return [4, _a.call(asyncIterable_1)];
                    case 7:
                        _b.sent();
                        _b.label = 8;
                    case 8: return [3, 10];
                    case 9:
                        if (e_2) throw e_2.error;
                        return [7];
                    case 10: return [7];
                    case 11:
                        subscriber.complete();
                        return [2];
                }
            });
        });
    }

    function takeUntil(notifier) {
        return operate(function (source, subscriber) {
            innerFrom(notifier).subscribe(createOperatorSubscriber(subscriber, function () { return subscriber.complete(); }, noop));
            !subscriber.closed && source.subscribe(subscriber);
        });
    }

    var entityId = 0;
    /**
     * The entity is the container of components.
     */
    var Entity = /** @class */ (function () {
        function Entity() {
            this._componentAddedSubject$ = new Subject();
            this._componentRemovedSubject$ = new Subject();
            this._componentMap = new Map();
            this.id = entityId++;
        }
        /**
         * Check if this entity has a component by name.
         * @param componentName
         */
        Entity.prototype.hasComponent = function (componentName) {
            return this._componentMap.has(componentName);
        };
        /**
         * Get a component of this entity by name.
         * @param componentName
         */
        Entity.prototype.getComponent = function (componentName) {
            var component = this._componentMap.get(componentName);
            if (typeof component !== 'undefined') {
                return component;
            }
            return undefined;
        };
        /**
         * Add a component to this entity.
         * @param component
         */
        Entity.prototype.addComponent = function (component) {
            this._componentMap.set(component.name, component);
            this._componentAddedSubject$.next(component);
            return this;
        };
        /**
         * Remove a component from this entity by name.
         * @param componentName
         */
        Entity.prototype.removeComponent = function (componentName) {
            var component = this._componentMap.get(componentName);
            if (typeof component !== 'undefined') {
                this._componentMap.delete(componentName);
                this._componentRemovedSubject$.next(component);
            }
            return this;
        };
        Object.defineProperty(Entity.prototype, "componentAdded$", {
            /**
             * Stream triggered when a component is added
             * Note: make sure to unsubscribe. If needed, use `DisposeBag` util
             */
            get: function () {
                return this._componentAddedSubject$.asObservable();
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(Entity.prototype, "componentRemoved$", {
            /**
             * Stream triggered when a component is removed
             * Note: make sure to unsubscribe. If needed, use `DisposeBag` util
             */
            get: function () {
                return this._componentRemovedSubject$.asObservable();
            },
            enumerable: false,
            configurable: true
        });
        return Entity;
    }());

    /**
     * The system is responsible for updating the entities.
     */
    var System = /** @class */ (function () {
        function System() {
        }
        /**
         * Called when system is added to the world
         * @param world
         */
        System.prototype.addedToWorld = function (world) {
            this._world = world;
        };
        /**
         * Called when system is removed from the world
         * @param world
         */
        System.prototype.removedFromWorld = function (world) {
            this._world = undefined;
        };
        /**
         * Update loop
         * @param tickerData
         */
        System.prototype.update = function (tickerData) {
            // empty
        };
        Object.defineProperty(System.prototype, "world", {
            /**
             * Reference to the world
             */
            get: function () {
                if (!this._world) {
                    throw Error('wait till the system is added to the world');
                }
                return this._world;
            },
            enumerable: false,
            configurable: true
        });
        return System;
    }());

    var EntityNode = /** @class */ (function () {
        function EntityNode(entity) {
            this.prev = null;
            this.next = null;
            this.entity = entity;
        }
        return EntityNode;
    }());

    /**
     * The entity list is a doubly-linked-list which allows the
     * entities to be added and removed efficiently.
     */
    var EntityList = /** @class */ (function () {
        function EntityList() {
            this.length = 0;
            this.head = null;
            this.tail = null;
            this._entityMap = new Map();
            //
        }
        /**
         * Add an entity into this list.
         * @param entity
         */
        EntityList.prototype.add = function (entity) {
            var node = new EntityNode(entity);
            if (this.head === null) {
                this.head = this.tail = node;
            }
            else {
                node.prev = this.tail;
                if (this.tail) {
                    this.tail.next = node;
                }
                this.tail = node;
            }
            this.length += 1;
            this._entityMap.set(entity.id, node);
        };
        /**
         * Remove an entity from this list.
         * @param entity
         */
        EntityList.prototype.remove = function (entity) {
            var entityId = entity.id;
            var node = this._entityMap.get(entityId);
            if (typeof node === 'undefined') {
                return;
            }
            if (node.prev === null) {
                this.head = node.next;
            }
            else {
                node.prev.next = node.next;
            }
            if (node.next === null) {
                this.tail = node.prev;
            }
            else {
                node.next.prev = node.prev;
            }
            this.length -= 1;
            this._entityMap.delete(entityId);
        };
        /**
         * Check if this list has the entity
         * @param entity
         */
        EntityList.prototype.has = function (entity) {
            return this._entityMap.has(entity.id);
        };
        /**
         * Remove all the entities from this list.
         */
        EntityList.prototype.clear = function () {
            this.head = this.tail = null;
            this.length = 0;
            this._entityMap.clear();
        };
        /**
         * Return an array holding all the entities in this list.
         */
        EntityList.prototype.toArray = function () {
            var array = [], node;
            for (node = this.head; node; node = node.next) {
                array.push(node.entity);
            }
            return array;
        };
        return EntityList;
    }());

    var Family = /** @class */ (function () {
        function Family(componentNames) {
            this._entityAddedSubject$ = new Subject();
            this._entityRemovedSubject$ = new Subject();
            this._entities = new EntityList();
            this._componentNames = componentNames;
        }
        /**
         * Get the entities of this family.
         */
        Family.prototype.getEntities = function () {
            return this._entities.toArray();
        };
        /**
         * Add the entity into the family if match.
         * @param entity
         */
        Family.prototype.addEntityIfMatch = function (entity) {
            if (!this._entities.has(entity) && this.matchEntity(entity)) {
                this._entities.add(entity);
                this._entityAddedSubject$.next(entity);
            }
        };
        /**
         * Remove the entity into the family if match.
         * @param entity
         */
        Family.prototype.removeEntity = function (entity) {
            if (this._entities.has(entity)) {
                this._entities.remove(entity);
                this._entityRemovedSubject$.next(entity);
            }
        };
        Family.prototype.onComponentAdded = function (entity, component) {
            this.addEntityIfMatch(entity);
        };
        Family.prototype.onComponentRemoved = function (entity, component) {
            // return if the entity is not in this family
            if (!this._entities.has(entity)) {
                return;
            }
            // remove the node if the removed component is required by this family
            var names = this._componentNames;
            var len = names.length;
            for (var i = 0; i < len; ++i) {
                if (names[i] === component.name) {
                    this._entities.remove(entity);
                    this._entityRemovedSubject$.next(entity);
                }
            }
        };
        Object.defineProperty(Family.prototype, "entityAdded$", {
            /**
             * Note: make sure to unsubscribe. If needed, use `DisposeBag` util
             */
            get: function () {
                return this._entityAddedSubject$.asObservable();
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(Family.prototype, "entityRemoved$", {
            /**
             * Note: make sure to unsubscribe. If needed, use `DisposeBag` util
             */
            get: function () {
                return this._entityRemovedSubject$.asObservable();
            },
            enumerable: false,
            configurable: true
        });
        Family.prototype.matchEntity = function (entity) {
            var componentNames = this._componentNames;
            var len = componentNames.length;
            for (var i = 0; i < len; ++i) {
                if (!entity.hasComponent(componentNames[i])) {
                    return false;
                }
            }
            return true;
        };
        return Family;
    }());

    var World = /** @class */ (function () {
        function World() {
            this._systems = [];
            this._entities = new EntityList();
            this._families = new Map();
            this._disposeEntityMap = new Map();
            // empty
        }
        /**
         * Add a system to this world.
         * @param system
         */
        World.prototype.addSystem = function (system) {
            this._systems.push(system);
            system.addedToWorld(this);
            return this;
        };
        /**
         * Remove a system from this world.
         * @param system
         */
        World.prototype.removeSystem = function (system) {
            var systems = this._systems;
            var len = systems.length;
            for (var i = 0; i < len; ++i) {
                if (systems[i] === system) {
                    systems.splice(i, 1);
                    system.removedFromWorld(this);
                }
            }
            return this;
        };
        /**
         * Remove all systems from this world
         */
        World.prototype.removeAllSystems = function () {
            var _this = this;
            this._systems.forEach(function (system) { return system.removedFromWorld(_this); });
            this._systems.length = 0;
            return this;
        };
        /**
         * Add an entity to this world.
         * @param entity
         */
        World.prototype.addEntity = function (entity) {
            var _this = this;
            // try to add the entity into each family
            this._families.forEach(function (family) { return family.addEntityIfMatch(entity); });
            var dispose$ = new Subject();
            this._disposeEntityMap.set(entity, dispose$);
            // update the entity-family relationship whenever components are
            // added to or removed from the entities
            var componentAdded$ = entity.componentAdded$, componentRemoved$ = entity.componentRemoved$;
            componentAdded$.pipe(takeUntil(dispose$)).subscribe(function (component) { return _this.onComponentAdded(entity, component); });
            componentRemoved$.pipe(takeUntil(dispose$)).subscribe(function (component) { return _this.onComponentRemoved(entity, component); });
            this._entities.add(entity);
            return this;
        };
        /**
         * Remove and entity from this world.
         * @param entity
         */
        World.prototype.removeEntity = function (entity) {
            this._families.forEach(function (family) { return family.removeEntity(entity); });
            this._entities.remove(entity);
            var dispose$ = this._disposeEntityMap.get(entity);
            if (typeof dispose$ !== 'undefined') {
                dispose$.next();
                this._disposeEntityMap.delete(entity);
            }
            return this;
        };
        /**
         * Removes all entities
         */
        World.prototype.removeAllEntities = function () {
            var _this = this;
            this._entities.toArray().forEach(function (entity) { return _this.removeEntity(entity); });
            return this;
        };
        /**
         * Get the entities having all the specified components.
         * @param componentNames
         */
        World.prototype.getEntities = function (componentNames) {
            var familyId = this.generateFamilyId(componentNames);
            this.ensureFamilyExists(componentNames, familyId);
            var family = this._families.get(familyId);
            if (typeof family !== 'undefined') {
                return family.getEntities();
            }
            throw Error("unable to getEntities, " + componentNames);
        };
        /**
         * For each system in the world, call its `update` method.
         * @param tickerData
         */
        World.prototype.update = function (tickerData) {
            var systems = this._systems;
            var len = systems.length;
            for (var i = 0; i < len; ++i) {
                systems[i].update(tickerData);
            }
        };
        /**
         * Returns the Observable for entities added with the specified components. The
         * Observable is also emitted when a component is added to an entity causing it
         * match the specified component names.
         * Note: make sure to unsubscribe. If needed, use `DisposeBag` util
         * @param componentNames
         */
        World.prototype.entityAdded$ = function (componentNames) {
            var familyId = this.generateFamilyId(componentNames);
            this.ensureFamilyExists(componentNames, familyId);
            var family = this._families.get(familyId);
            if (typeof family !== 'undefined') {
                return family.entityAdded$;
            }
            throw Error("unable to perform entityAdded, " + componentNames);
        };
        /**
         * Returns the Observable for entities removed with the specified components.
         * The Observable is also emitted when a component is removed from an entity
         * causing it to no longer match the specified component names.
         * Note: make sure to unsubscribe. If needed, use `DisposeBag` util
         * @param componentNames
         */
        World.prototype.entityRemoved$ = function (componentNames) {
            var familyId = this.generateFamilyId(componentNames);
            this.ensureFamilyExists(componentNames, familyId);
            var family = this._families.get(familyId);
            if (typeof family !== 'undefined') {
                return family.entityRemoved$;
            }
            throw Error("unable to perform entityRemoved, " + componentNames);
        };
        World.prototype.generateFamilyId = function (componentNames) {
            var keys = componentNames.map(function (data) { return data.toString(); });
            return "$-" + keys.join(',');
        };
        World.prototype.ensureFamilyExists = function (componentNames, familyId) {
            var families = this._families;
            if (families.has(familyId)) {
                return;
            }
            var family = new Family(__spreadArray([], componentNames));
            families.set(familyId, family);
            for (var node = this._entities.head; node; node = node.next) {
                var family_1 = families.get(familyId);
                if (typeof family_1 !== 'undefined') {
                    family_1.addEntityIfMatch(node.entity);
                }
            }
        };
        World.prototype.onComponentAdded = function (entity, component) {
            this._families.forEach(function (family) { return family.onComponentAdded(entity, component); });
        };
        World.prototype.onComponentRemoved = function (entity, component) {
            this._families.forEach(function (family) { return family.onComponentRemoved(entity, component); });
        };
        return World;
    }());

    exports.Entity = Entity;
    exports.System = System;
    exports.World = World;

    Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=super-ecs.umd.js.map