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107 lines
2.6 KiB
107 lines
2.6 KiB
'use strict'; |
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//This file contains the ES6 extensions to the core Promises/A+ API |
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var Promise = require('./core.js'); |
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module.exports = Promise; |
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/* Static Functions */ |
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var TRUE = valuePromise(true); |
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var FALSE = valuePromise(false); |
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var NULL = valuePromise(null); |
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var UNDEFINED = valuePromise(undefined); |
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var ZERO = valuePromise(0); |
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var EMPTYSTRING = valuePromise(''); |
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function valuePromise(value) { |
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var p = new Promise(Promise._61); |
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p._65 = 1; |
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p._55 = value; |
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return p; |
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} |
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Promise.resolve = function (value) { |
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if (value instanceof Promise) return value; |
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if (value === null) return NULL; |
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if (value === undefined) return UNDEFINED; |
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if (value === true) return TRUE; |
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if (value === false) return FALSE; |
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if (value === 0) return ZERO; |
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if (value === '') return EMPTYSTRING; |
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if (typeof value === 'object' || typeof value === 'function') { |
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try { |
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var then = value.then; |
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if (typeof then === 'function') { |
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return new Promise(then.bind(value)); |
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} |
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} catch (ex) { |
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return new Promise(function (resolve, reject) { |
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reject(ex); |
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}); |
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} |
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} |
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return valuePromise(value); |
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}; |
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Promise.all = function (arr) { |
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var args = Array.prototype.slice.call(arr); |
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return new Promise(function (resolve, reject) { |
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if (args.length === 0) return resolve([]); |
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var remaining = args.length; |
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function res(i, val) { |
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if (val && (typeof val === 'object' || typeof val === 'function')) { |
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if (val instanceof Promise && val.then === Promise.prototype.then) { |
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while (val._65 === 3) { |
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val = val._55; |
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} |
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if (val._65 === 1) return res(i, val._55); |
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if (val._65 === 2) reject(val._55); |
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val.then(function (val) { |
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res(i, val); |
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}, reject); |
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return; |
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} else { |
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var then = val.then; |
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if (typeof then === 'function') { |
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var p = new Promise(then.bind(val)); |
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p.then(function (val) { |
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res(i, val); |
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}, reject); |
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return; |
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} |
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} |
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} |
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args[i] = val; |
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if (--remaining === 0) { |
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resolve(args); |
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} |
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} |
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for (var i = 0; i < args.length; i++) { |
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res(i, args[i]); |
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} |
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}); |
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}; |
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Promise.reject = function (value) { |
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return new Promise(function (resolve, reject) { |
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reject(value); |
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}); |
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}; |
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Promise.race = function (values) { |
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return new Promise(function (resolve, reject) { |
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values.forEach(function(value){ |
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Promise.resolve(value).then(resolve, reject); |
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}); |
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}); |
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}; |
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/* Prototype Methods */ |
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Promise.prototype['catch'] = function (onRejected) { |
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return this.then(null, onRejected); |
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};
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