corrade-nucleus-nucleons – Blame information for rev 20
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Rev | Author | Line No. | Line |
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20 | office | 1 | "use strict"; |
2 | module.exports = function(Promise, |
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3 | PromiseArray, |
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4 | apiRejection, |
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5 | tryConvertToPromise, |
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6 | INTERNAL, |
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7 | debug) { |
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8 | var getDomain = Promise._getDomain; |
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9 | var util = require("./util"); |
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10 | var tryCatch = util.tryCatch; |
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11 | |||
12 | function ReductionPromiseArray(promises, fn, initialValue, _each) { |
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13 | this.constructor$(promises); |
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14 | var domain = getDomain(); |
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15 | this._fn = domain === null ? fn : util.domainBind(domain, fn); |
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16 | if (initialValue !== undefined) { |
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17 | initialValue = Promise.resolve(initialValue); |
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18 | initialValue._attachCancellationCallback(this); |
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19 | } |
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20 | this._initialValue = initialValue; |
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21 | this._currentCancellable = null; |
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22 | if(_each === INTERNAL) { |
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23 | this._eachValues = Array(this._length); |
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24 | } else if (_each === 0) { |
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25 | this._eachValues = null; |
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26 | } else { |
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27 | this._eachValues = undefined; |
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28 | } |
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29 | this._promise._captureStackTrace(); |
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30 | this._init$(undefined, -5); |
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31 | } |
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32 | util.inherits(ReductionPromiseArray, PromiseArray); |
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33 | |||
34 | ReductionPromiseArray.prototype._gotAccum = function(accum) { |
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35 | if (this._eachValues !== undefined && |
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36 | this._eachValues !== null && |
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37 | accum !== INTERNAL) { |
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38 | this._eachValues.push(accum); |
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39 | } |
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40 | }; |
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41 | |||
42 | ReductionPromiseArray.prototype._eachComplete = function(value) { |
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43 | if (this._eachValues !== null) { |
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44 | this._eachValues.push(value); |
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45 | } |
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46 | return this._eachValues; |
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47 | }; |
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48 | |||
49 | ReductionPromiseArray.prototype._init = function() {}; |
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50 | |||
51 | ReductionPromiseArray.prototype._resolveEmptyArray = function() { |
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52 | this._resolve(this._eachValues !== undefined ? this._eachValues |
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53 | : this._initialValue); |
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54 | }; |
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55 | |||
56 | ReductionPromiseArray.prototype.shouldCopyValues = function () { |
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57 | return false; |
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58 | }; |
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59 | |||
60 | ReductionPromiseArray.prototype._resolve = function(value) { |
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61 | this._promise._resolveCallback(value); |
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62 | this._values = null; |
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63 | }; |
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64 | |||
65 | ReductionPromiseArray.prototype._resultCancelled = function(sender) { |
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66 | if (sender === this._initialValue) return this._cancel(); |
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67 | if (this._isResolved()) return; |
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68 | this._resultCancelled$(); |
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69 | if (this._currentCancellable instanceof Promise) { |
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70 | this._currentCancellable.cancel(); |
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71 | } |
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72 | if (this._initialValue instanceof Promise) { |
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73 | this._initialValue.cancel(); |
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74 | } |
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75 | }; |
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76 | |||
77 | ReductionPromiseArray.prototype._iterate = function (values) { |
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78 | this._values = values; |
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79 | var value; |
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80 | var i; |
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81 | var length = values.length; |
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82 | if (this._initialValue !== undefined) { |
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83 | value = this._initialValue; |
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84 | i = 0; |
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85 | } else { |
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86 | value = Promise.resolve(values[0]); |
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87 | i = 1; |
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88 | } |
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89 | |||
90 | this._currentCancellable = value; |
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91 | |||
92 | if (!value.isRejected()) { |
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93 | for (; i < length; ++i) { |
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94 | var ctx = { |
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95 | accum: null, |
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96 | value: values[i], |
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97 | index: i, |
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98 | length: length, |
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99 | array: this |
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100 | }; |
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101 | value = value._then(gotAccum, undefined, undefined, ctx, undefined); |
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102 | } |
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103 | } |
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104 | |||
105 | if (this._eachValues !== undefined) { |
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106 | value = value |
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107 | ._then(this._eachComplete, undefined, undefined, this, undefined); |
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108 | } |
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109 | value._then(completed, completed, undefined, value, this); |
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110 | }; |
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111 | |||
112 | Promise.prototype.reduce = function (fn, initialValue) { |
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113 | return reduce(this, fn, initialValue, null); |
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114 | }; |
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115 | |||
116 | Promise.reduce = function (promises, fn, initialValue, _each) { |
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117 | return reduce(promises, fn, initialValue, _each); |
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118 | }; |
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119 | |||
120 | function completed(valueOrReason, array) { |
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121 | if (this.isFulfilled()) { |
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122 | array._resolve(valueOrReason); |
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123 | } else { |
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124 | array._reject(valueOrReason); |
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125 | } |
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126 | } |
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127 | |||
128 | function reduce(promises, fn, initialValue, _each) { |
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129 | if (typeof fn !== "function") { |
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130 | return apiRejection("expecting a function but got " + util.classString(fn)); |
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131 | } |
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132 | var array = new ReductionPromiseArray(promises, fn, initialValue, _each); |
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133 | return array.promise(); |
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134 | } |
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135 | |||
136 | function gotAccum(accum) { |
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137 | this.accum = accum; |
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138 | this.array._gotAccum(accum); |
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139 | var value = tryConvertToPromise(this.value, this.array._promise); |
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140 | if (value instanceof Promise) { |
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141 | this.array._currentCancellable = value; |
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142 | return value._then(gotValue, undefined, undefined, this, undefined); |
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143 | } else { |
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144 | return gotValue.call(this, value); |
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145 | } |
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146 | } |
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147 | |||
148 | function gotValue(value) { |
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149 | var array = this.array; |
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150 | var promise = array._promise; |
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151 | var fn = tryCatch(array._fn); |
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152 | promise._pushContext(); |
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153 | var ret; |
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154 | if (array._eachValues !== undefined) { |
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155 | ret = fn.call(promise._boundValue(), value, this.index, this.length); |
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156 | } else { |
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157 | ret = fn.call(promise._boundValue(), |
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158 | this.accum, value, this.index, this.length); |
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159 | } |
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160 | if (ret instanceof Promise) { |
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161 | array._currentCancellable = ret; |
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162 | } |
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163 | var promiseCreated = promise._popContext(); |
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164 | debug.checkForgottenReturns( |
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165 | ret, |
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166 | promiseCreated, |
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167 | array._eachValues !== undefined ? "Promise.each" : "Promise.reduce", |
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168 | promise |
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169 | ); |
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170 | return ret; |
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171 | } |
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172 | }; |