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Diffstat (limited to 'node_modules/bluebird/js/release/reduce.js')
-rw-r--r-- | node_modules/bluebird/js/release/reduce.js | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/node_modules/bluebird/js/release/reduce.js b/node_modules/bluebird/js/release/reduce.js new file mode 100644 index 000000000..26e2b1a97 --- /dev/null +++ b/node_modules/bluebird/js/release/reduce.js @@ -0,0 +1,172 @@ +"use strict"; +module.exports = function(Promise, + PromiseArray, + apiRejection, + tryConvertToPromise, + INTERNAL, + debug) { +var getDomain = Promise._getDomain; +var util = require("./util"); +var tryCatch = util.tryCatch; + +function ReductionPromiseArray(promises, fn, initialValue, _each) { + this.constructor$(promises); + var domain = getDomain(); + this._fn = domain === null ? fn : util.domainBind(domain, fn); + if (initialValue !== undefined) { + initialValue = Promise.resolve(initialValue); + initialValue._attachCancellationCallback(this); + } + this._initialValue = initialValue; + this._currentCancellable = null; + if(_each === INTERNAL) { + this._eachValues = Array(this._length); + } else if (_each === 0) { + this._eachValues = null; + } else { + this._eachValues = undefined; + } + this._promise._captureStackTrace(); + this._init$(undefined, -5); +} +util.inherits(ReductionPromiseArray, PromiseArray); + +ReductionPromiseArray.prototype._gotAccum = function(accum) { + if (this._eachValues !== undefined && + this._eachValues !== null && + accum !== INTERNAL) { + this._eachValues.push(accum); + } +}; + +ReductionPromiseArray.prototype._eachComplete = function(value) { + if (this._eachValues !== null) { + this._eachValues.push(value); + } + return this._eachValues; +}; + +ReductionPromiseArray.prototype._init = function() {}; + +ReductionPromiseArray.prototype._resolveEmptyArray = function() { + this._resolve(this._eachValues !== undefined ? this._eachValues + : this._initialValue); +}; + +ReductionPromiseArray.prototype.shouldCopyValues = function () { + return false; +}; + +ReductionPromiseArray.prototype._resolve = function(value) { + this._promise._resolveCallback(value); + this._values = null; +}; + +ReductionPromiseArray.prototype._resultCancelled = function(sender) { + if (sender === this._initialValue) return this._cancel(); + if (this._isResolved()) return; + this._resultCancelled$(); + if (this._currentCancellable instanceof Promise) { + this._currentCancellable.cancel(); + } + if (this._initialValue instanceof Promise) { + this._initialValue.cancel(); + } +}; + +ReductionPromiseArray.prototype._iterate = function (values) { + this._values = values; + var value; + var i; + var length = values.length; + if (this._initialValue !== undefined) { + value = this._initialValue; + i = 0; + } else { + value = Promise.resolve(values[0]); + i = 1; + } + + this._currentCancellable = value; + + if (!value.isRejected()) { + for (; i < length; ++i) { + var ctx = { + accum: null, + value: values[i], + index: i, + length: length, + array: this + }; + value = value._then(gotAccum, undefined, undefined, ctx, undefined); + } + } + + if (this._eachValues !== undefined) { + value = value + ._then(this._eachComplete, undefined, undefined, this, undefined); + } + value._then(completed, completed, undefined, value, this); +}; + +Promise.prototype.reduce = function (fn, initialValue) { + return reduce(this, fn, initialValue, null); +}; + +Promise.reduce = function (promises, fn, initialValue, _each) { + return reduce(promises, fn, initialValue, _each); +}; + +function completed(valueOrReason, array) { + if (this.isFulfilled()) { + array._resolve(valueOrReason); + } else { + array._reject(valueOrReason); + } +} + +function reduce(promises, fn, initialValue, _each) { + if (typeof fn !== "function") { + return apiRejection("expecting a function but got " + util.classString(fn)); + } + var array = new ReductionPromiseArray(promises, fn, initialValue, _each); + return array.promise(); +} + +function gotAccum(accum) { + this.accum = accum; + this.array._gotAccum(accum); + var value = tryConvertToPromise(this.value, this.array._promise); + if (value instanceof Promise) { + this.array._currentCancellable = value; + return value._then(gotValue, undefined, undefined, this, undefined); + } else { + return gotValue.call(this, value); + } +} + +function gotValue(value) { + var array = this.array; + var promise = array._promise; + var fn = tryCatch(array._fn); + promise._pushContext(); + var ret; + if (array._eachValues !== undefined) { + ret = fn.call(promise._boundValue(), value, this.index, this.length); + } else { + ret = fn.call(promise._boundValue(), + this.accum, value, this.index, this.length); + } + if (ret instanceof Promise) { + array._currentCancellable = ret; + } + var promiseCreated = promise._popContext(); + debug.checkForgottenReturns( + ret, + promiseCreated, + array._eachValues !== undefined ? "Promise.each" : "Promise.reduce", + promise + ); + return ret; +} +}; |