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9 |
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10 | (function(define) { 'use strict';
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11 | define(function(require) {
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12 |
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13 | var when = require('./when');
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14 | var Promise = when.Promise;
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15 | var toPromise = when.resolve;
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16 |
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17 | return {
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18 | all: when.lift(all),
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19 | map: map,
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20 | settle: settle
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21 | };
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22 |
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23 | |
24 |
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25 |
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26 |
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27 |
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28 |
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29 |
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30 | function all(object) {
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31 | var p = Promise._defer();
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32 | var resolver = Promise._handler(p);
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33 |
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34 | var results = {};
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35 | var keys = Object.keys(object);
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36 | var pending = keys.length;
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37 |
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38 | for(var i=0, k; i<keys.length; ++i) {
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39 | k = keys[i];
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40 | Promise._handler(object[k]).fold(settleKey, k, results, resolver);
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41 | }
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42 |
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43 | if(pending === 0) {
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44 | resolver.resolve(results);
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45 | }
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46 |
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47 | return p;
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48 |
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49 | function settleKey(k, x, resolver) {
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50 |
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51 | this[k] = x;
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52 | if(--pending === 0) {
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53 | resolver.resolve(results);
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54 | }
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55 | }
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56 | }
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57 |
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58 | |
59 |
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60 |
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61 |
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62 |
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63 |
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64 |
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65 |
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66 |
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67 | function map(object, f) {
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68 | return toPromise(object).then(function(object) {
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69 | return all(Object.keys(object).reduce(function(o, k) {
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70 | o[k] = toPromise(object[k]).fold(mapWithKey, k);
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71 | return o;
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72 | }, {}));
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73 | });
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74 |
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75 | function mapWithKey(k, x) {
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76 | return f(x, k);
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77 | }
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78 | }
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79 |
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80 | |
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82 |
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83 |
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84 |
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85 |
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86 |
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87 | function settle(object) {
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88 | var keys = Object.keys(object);
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89 | var results = {};
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90 |
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91 | if(keys.length === 0) {
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92 | return toPromise(results);
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93 | }
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94 |
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95 | var p = Promise._defer();
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96 | var resolver = Promise._handler(p);
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97 | var promises = keys.map(function(k) { return object[k]; });
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98 |
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99 | when.settle(promises).then(function(states) {
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100 | populateResults(keys, states, results, resolver);
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101 | });
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102 |
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103 | return p;
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104 | }
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105 |
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106 | function populateResults(keys, states, results, resolver) {
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107 | for(var i=0; i<keys.length; i++) {
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108 | results[keys[i]] = states[i];
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109 | }
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110 | resolver.resolve(results);
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111 | }
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112 |
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113 | });
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114 | })(typeof define === 'function' && define.amd ? define : function (factory) { module.exports = factory(require); });
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