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{ ObjectLiteral } from \"../common/ObjectLiteral\";\n\nexport class OrmUtils {\n\n // -------------------------------------------------------------------------\n // Public methods\n // -------------------------------------------------------------------------\n\n /**\n * Chunks array into peaces.\n */\n static chunk<T>(array: T[], size: number): T[][] {\n return Array.from(Array(Math.ceil(array.length / size)), (_, i) => {\n return array.slice(i * size, i * size + size);\n });\n }\n\n static splitClassesAndStrings<T>(clsesAndStrings: (string | T)[]): [T[], string[]] {\n return [\n (clsesAndStrings).filter((cls): cls is T => typeof cls !== \"string\"),\n (clsesAndStrings).filter((str): str is string => typeof str === \"string\"),\n ];\n }\n\n static groupBy<T, R>(array: T[], propertyCallback: (item: T) => R): { id: R, items: T[] }[] {\n return array.reduce((groupedArray, value) => {\n const key = propertyCallback(value);\n let grouped = groupedArray.find(i => i.id === key);\n if (!grouped) {\n grouped = { id: key, items: [] };\n groupedArray.push(grouped);\n }\n grouped.items.push(value);\n return groupedArray;\n }, [] as Array<{ id: R, items: T[] }>);\n }\n\n static uniq<T>(array: T[], criteria?: (item: T) => any): T[];\n static uniq<T, K extends keyof T>(array: T[], property: K): T[];\n static uniq<T, K extends keyof T>(array: T[], criteriaOrProperty?: ((item: T) => any) | K): T[] {\n return array.reduce((uniqueArray, item) => {\n let found: boolean = false;\n if (criteriaOrProperty instanceof Function) {\n const itemValue = criteriaOrProperty(item);\n found = !!uniqueArray.find(uniqueItem => criteriaOrProperty(uniqueItem) === itemValue);\n\n } else if (typeof criteriaOrProperty === \"string\") {\n found = !!uniqueArray.find(uniqueItem => uniqueItem[criteriaOrProperty] === item[criteriaOrProperty]);\n\n } else {\n found = uniqueArray.indexOf(item) !== -1;\n }\n\n if (!found)\n uniqueArray.push(item);\n\n return uniqueArray;\n }, [] as T[]);\n }\n\n static isObject(item: any) {\n return (item && typeof item === \"object\" && !Array.isArray(item));\n }\n\n /**\n * Deep Object.assign.\n *\n * @see http://stackoverflow.com/a/34749873\n */\n static mergeDeep(target: any, ...sources: any[]): any {\n if (!sources.length) return target;\n const source = sources.shift();\n\n if (this.isObject(target) && this.isObject(source)) {\n for (const key in source) {\n let propertyKey = key;\n if (source[key] instanceof Promise)\n continue;\n\n // if (source[key] instanceof Promise) {\n // propertyKey = \"__\" + key + \"__\";\n // }\n\n if (this.isObject(source[propertyKey])\n && !(source[propertyKey] instanceof Map)\n && !(source[propertyKey] instanceof Set)\n && !(source[propertyKey] instanceof Date)\n && !(source[propertyKey] instanceof Buffer)) {\n if (!target[key]) Object.assign(target, { [key]: Object.create(Object.getPrototypeOf(source[propertyKey])) });\n this.mergeDeep(target[key], source[propertyKey]);\n } else {\n Object.assign(target, { [key]: source[propertyKey] });\n }\n }\n }\n\n return this.mergeDeep(target, ...sources);\n }\n\n /**\n * Deep compare objects.\n *\n * @see http://stackoverflow.com/a/1144249\n */\n static deepCompare(...args: any[]) {\n let i: any, l: any, leftChain: any, rightChain: any;\n\n if (arguments.length < 1) {\n return true; // Die silently? Don't know how to handle such case, please help...\n // throw \"Need two or more arguments to compare\";\n }\n\n for (i = 1, l = arguments.length; i < l; i++) {\n\n leftChain = []; // Todo: this can be cached\n rightChain = [];\n\n if (!this.compare2Objects(leftChain, rightChain, arguments[0], arguments[i])) {\n return false;\n }\n }\n\n return true;\n }\n\n /**\n * Transforms given value into boolean value.\n */\n static toBoolean(value: any): boolean {\n if (typeof value === \"boolean\")\n return value;\n\n if (typeof value === \"string\")\n return value === \"true\" || value === \"1\";\n\n if (typeof value === \"number\")\n return value > 0;\n\n return false;\n }\n\n /**\n * Composes an object from the given array of keys and values.\n */\n static zipObject(keys: any[], values: any[]): ObjectLiteral {\n return keys.reduce((object, column, index) => {\n object[column] = values[index];\n return object;\n }, {} as ObjectLiteral);\n }\n\n /**\n * Compares two arrays.\n */\n static isArraysEqual(arr1: any[], arr2: any[]): boolean {\n if (arr1.length !== arr2.length) return false;\n return arr1.every(element => {\n return arr2.indexOf(element) !== -1;\n });\n }\n\n // -------------------------------------------------------------------------\n // Private methods\n // -------------------------------------------------------------------------\n\n private static compare2Objects(leftChain: any, rightChain: any, x: any, y: any) {\n let p;\n\n // remember that NaN === NaN returns false\n // and isNaN(undefined) returns true\n if (isNaN(x) && isNaN(y) && typeof x === \"number\" && typeof y === \"number\")\n return true;\n\n // Compare primitives and functions.\n // Check if both arguments link to the same object.\n // Especially useful on the step where we compare prototypes\n if (x === y)\n return true;\n\n // Unequal, but either is null or undefined (use case: jsonb comparasion)\n // PR #3776, todo: add tests\n if (x === null || y === null || x === undefined || y === undefined)\n return false;\n\n // Fix the buffer compare bug.\n // See: https://github.com/typeorm/typeorm/issues/3654\n if ((typeof x.equals === \"function\" || x.equals instanceof Function) && x.equals(y))\n return true;\n\n // Works in case when functions are created in constructor.\n // Comparing dates is a common scenario. Another built-ins?\n // We can even handle functions passed across iframes\n if ((typeof x === \"function\" && typeof y === \"function\") ||\n (x instanceof Date && y instanceof Date) ||\n (x instanceof RegExp && y instanceof RegExp) ||\n (x instanceof String && y instanceof String) ||\n (x instanceof Number && y instanceof Number))\n return x.toString() === y.toString();\n\n // At last checking prototypes as good as we can\n if (!(x instanceof Object && y instanceof Object))\n return false;\n\n if (x.isPrototypeOf(y) || y.isPrototypeOf(x))\n return false;\n\n if (x.constructor !== y.constructor)\n return false;\n\n if (x.prototype !== y.prototype)\n return false;\n\n // Check for infinitive linking loops\n if (leftChain.indexOf(x) > -1 || rightChain.indexOf(y) > -1)\n return false;\n\n // Quick checking of one object being a subset of another.\n // todo: cache the structure of arguments[0] for performance\n for (p in y) {\n if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {\n return false;\n }\n else if (typeof y[p] !== typeof x[p]) {\n return false;\n }\n }\n\n for (p in x) {\n if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {\n return false;\n }\n else if (typeof y[p] !== typeof x[p]) {\n return false;\n }\n\n switch (typeof (x[p])) {\n case \"object\":\n case \"function\":\n\n leftChain.push(x);\n rightChain.push(y);\n\n if (!this.compare2Objects(leftChain, rightChain, x[p], y[p])) {\n return false;\n }\n\n leftChain.pop();\n rightChain.pop();\n break;\n\n default:\n if (x[p] !== y[p]) {\n return false;\n }\n break;\n }\n }\n\n return true;\n }\n\n}\n"],"sourceRoot":".."}
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