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// if the variable is defined\r\nexport const exists = what => typeof what !== 'undefined'\r\n\r\n// used for JSON object type checking\r\nconst object_constructor = {}.constructor\r\n\r\n// detects a JSON object\r\nexport function is_object(object)\r\n{\r\n\treturn exists(object) && (object !== null) && object.constructor === object_constructor\r\n}\r\n\r\n// extends the first object with \r\n/* istanbul ignore next: some weird transpiled code, not testable */\r\nexport function extend(...objects)\r\n{\r\n\tobjects = objects.filter(x => exists(x))\r\n\r\n\tif (objects.length === 0)\r\n\t{\r\n\t\treturn\r\n\t}\r\n\t\r\n\tif (objects.length === 1)\r\n\t{\r\n\t\treturn objects[0]\r\n\t}\r\n\r\n\tconst to = objects[0]\r\n\tconst from = objects[1]\r\n\r\n\tif (objects.length > 2)\r\n\t{\r\n\t\tconst last = objects.pop()\r\n\t\tconst intermediary_result = extend.apply(this, objects)\r\n\t\treturn extend(intermediary_result, last)\r\n\t}\r\n\r\n\tfor (let key of Object.keys(from))\r\n\t{\r\n\t\tif (is_object(from[key]))\r\n\t\t{\r\n\t\t\tif (!is_object(to[key]))\r\n\t\t\t{\r\n\t\t\t\tto[key] = {}\r\n\t\t\t}\r\n\r\n\t\t\textend(to[key], from[key])\r\n\t\t}\r\n\t\telse if (Array.isArray(from[key]))\r\n\t\t{\r\n\t\t\tif (!Array.isArray(to[key]))\r\n\t\t\t{\r\n\t\t\t\tto[key] = []\r\n\t\t\t}\r\n\r\n\t\t\tto[key] = to[key].concat(clone(from[key]))\r\n\t\t}\r\n\t\telse\r\n\t\t{\r\n\t\t\tto[key] = from[key]\r\n\t\t}\r\n\t}\r\n\r\n\treturn to\r\n}\r\n\r\nexport function merge()\r\n{\r\n\tconst parameters = Array.prototype.slice.call(arguments, 0)\r\n\tparameters.unshift({})\r\n\treturn extend.apply(this, parameters)\r\n}\r\n\r\nexport function clone(object)\r\n{\r\n\tif (is_object(object))\r\n\t{\r\n\t\treturn merge({}, object)\r\n\t}\r\n\telse if (Array.isArray(object))\r\n\t{\r\n\t\treturn object.map(x => clone(x))\r\n\t}\r\n\telse\r\n\t{\r\n\t\treturn object\r\n\t}\r\n}\r\n\r\n// converts all camelCased keys of an object to lodash style\r\nexport function convert_from_camel_case(object)\r\n{\r\n\tfor (let key of Object.keys(object))\r\n\t{\r\n\t\tif (/[A-Z]/.test(key))\r\n\t\t{\r\n\t\t\tconst lo_dashed_key = key.replace(/([A-Z])/g, function(match, group_1)\r\n\t\t\t{\r\n\t\t\t\treturn '_' + group_1.toLowerCase()\r\n\t\t\t})\r\n\r\n\t\t\tif (!exists(object[lo_dashed_key]))\r\n\t\t\t{\r\n\t\t\t\tobject[lo_dashed_key] = object[key]\r\n\t\t\t\tdelete object[key]\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\r\n\treturn object\r\n}\r\n\r\nfunction escape_regexp(string)\r\n{\r\n\tconst specials = new RegExp(\"[.*+?|()\\\\[\\\\]{}\\\\\\\\]\", 'g')\r\n\treturn string.replace(specials, \"\\\\$&\")\r\n}\r\n\r\nexport function replace_all(where, what, with_what)\r\n{\r\n\tconst regexp = new RegExp(escape_regexp(what), 'g')\r\n\treturn where.replace(regexp, with_what)\r\n}\r\n\r\nexport function starts_with(string, substring)\r\n{\r\n\tlet j = substring.length\r\n\r\n\tif (j > string.length)\r\n\t{\r\n\t\treturn false\r\n\t}\r\n\r\n\twhile (j > 0)\r\n\t{\r\n\t\tj--\r\n\r\n\t\tif (string[j] !== substring[j])\r\n\t\t{\r\n\t\t\treturn false\r\n\t\t}\r\n\t}\r\n\r\n\treturn true\r\n}\r\n\r\nexport function ends_with(string, substring)\r\n{\r\n\tlet i = string.length\r\n\tlet j = substring.length\r\n\r\n\tif (j > i)\r\n\t{\r\n\t\treturn false\r\n\t}\r\n\r\n\twhile (j > 0)\r\n\t{\r\n\t\ti--\r\n\t\tj--\r\n\r\n\t\tif (string[i] !== substring[j])\r\n\t\t{\r\n\t\t\treturn false\r\n\t\t}\r\n\t}\r\n\r\n\treturn true\r\n\r\n\t// const index = string.lastIndexOf(substring)\r\n\t// return index >= 0 && index === string.length - substring.length\r\n}\r\n\r\nexport function is_empty(array)\r\n{\r\n\treturn array.length === 0\r\n}\r\n\r\nexport function not_empty(array)\r\n{\r\n\treturn array.length > 0\r\n}\r\n\r\n// repeat string N times\r\nexport function repeat(what, times)\r\n{\r\n\tlet result = ''\r\n\twhile (times > 0)\r\n\t{\r\n\t\tresult += what\r\n\t\ttimes--\r\n\t}\r\n\treturn result\r\n}\r\n\r\n// if the text is blank\r\nexport function is_blank(text)\r\n{\r\n\treturn !exists(text) || !text.replace(/\\s/g, '')\r\n}\r\n\r\n// zips two arrays\r\nexport function zip(a, b)\r\n{\r\n\treturn a.map(function(_, index) \r\n\t{\r\n\t\treturn [a[index], b[index]]\r\n\t})\r\n}\r\n\r\n// last element of an array\r\nexport function last(array)\r\n{\r\n\treturn array[array.length - 1]\r\n}\r\n\r\n/**\r\n * Returns a camel case variant of the string, unless it's in TitleCase.\r\n * @param {string} string\r\n */\r\nexport function camel_case(string)\r\n{\r\n\tconst nameParts = string.split('_')\r\n\treturn nameParts.slice(1).reduce((reduced, current) =>\r\n\t{\r\n\t\treturn reduced + current.charAt(0).toUpperCase() + current.slice(1)\r\n\t},\r\n\tnameParts[0])\r\n}\r\n\r\n// detects \"private\" object properties (just in case there are any)\r\nconst is_private_property = name => starts_with(name, '__')\r\n\r\n/**\r\n * Creates camel case variants of the attributes on the object\r\n * @param {object} object\r\n */\r\nexport function alias_properties_with_camel_case(object)\r\n{\r\n\tfor (let key of Object.keys(object).filter(key => !is_private_property(key)))\r\n\t{\r\n\t\tobject[camel_case(key)] = object[key]\r\n\t}\r\n}\r\n"]} |