1 | 'use strict';
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2 |
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3 |
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4 |
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5 | var Promise = require('./core.js');
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6 |
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7 | module.exports = Promise;
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8 |
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9 |
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10 |
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11 | var TRUE = valuePromise(true);
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12 | var FALSE = valuePromise(false);
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13 | var NULL = valuePromise(null);
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14 | var UNDEFINED = valuePromise(undefined);
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15 | var ZERO = valuePromise(0);
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16 | var EMPTYSTRING = valuePromise('');
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17 |
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18 | function valuePromise(value) {
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19 | var p = new Promise(Promise._noop);
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20 | p._state = 1;
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21 | p._value = value;
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22 | return p;
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23 | }
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24 | Promise.resolve = function (value) {
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25 | if (value instanceof Promise) return value;
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26 |
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27 | if (value === null) return NULL;
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28 | if (value === undefined) return UNDEFINED;
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29 | if (value === true) return TRUE;
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30 | if (value === false) return FALSE;
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31 | if (value === 0) return ZERO;
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32 | if (value === '') return EMPTYSTRING;
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33 |
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34 | if (typeof value === 'object' || typeof value === 'function') {
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35 | try {
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36 | var then = value.then;
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37 | if (typeof then === 'function') {
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38 | return new Promise(then.bind(value));
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39 | }
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40 | } catch (ex) {
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41 | return new Promise(function (resolve, reject) {
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42 | reject(ex);
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43 | });
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44 | }
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45 | }
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46 | return valuePromise(value);
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47 | };
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48 |
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49 | Promise.all = function (arr) {
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50 | var args = Array.prototype.slice.call(arr);
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51 |
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52 | return new Promise(function (resolve, reject) {
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53 | if (args.length === 0) return resolve([]);
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54 | var remaining = args.length;
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55 | function res(i, val) {
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56 | if (val && (typeof val === 'object' || typeof val === 'function')) {
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57 | if (val instanceof Promise && val.then === Promise.prototype.then) {
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58 | while (val._state === 3) {
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59 | val = val._value;
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60 | }
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61 | if (val._state === 1) return res(i, val._value);
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62 | if (val._state === 2) reject(val._value);
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63 | val.then(function (val) {
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64 | res(i, val);
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65 | }, reject);
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66 | return;
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67 | } else {
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68 | var then = val.then;
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69 | if (typeof then === 'function') {
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70 | var p = new Promise(then.bind(val));
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71 | p.then(function (val) {
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72 | res(i, val);
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73 | }, reject);
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74 | return;
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75 | }
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76 | }
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77 | }
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78 | args[i] = val;
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79 | if (--remaining === 0) {
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80 | resolve(args);
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81 | }
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82 | }
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83 | for (var i = 0; i < args.length; i++) {
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84 | res(i, args[i]);
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85 | }
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86 | });
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87 | };
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88 |
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89 | Promise.reject = function (value) {
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90 | return new Promise(function (resolve, reject) {
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91 | reject(value);
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92 | });
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93 | };
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94 |
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95 | Promise.race = function (values) {
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96 | return new Promise(function (resolve, reject) {
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97 | values.forEach(function(value){
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98 | Promise.resolve(value).then(resolve, reject);
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99 | });
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100 | });
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101 | };
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102 |
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103 |
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104 |
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105 | Promise.prototype['catch'] = function (onRejected) {
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106 | return this.then(null, onRejected);
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107 | };
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