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- "use strict";
- module.exports = function(
- Promise, PromiseArray, tryConvertToPromise, apiRejection) {
- var util = require("./util");
- var isObject = util.isObject;
- var es5 = require("./es5");
- var Es6Map;
- if (typeof Map === "function") Es6Map = Map;
-
- var mapToEntries = (function() {
- var index = 0;
- var size = 0;
-
- function extractEntry(value, key) {
- this[index] = value;
- this[index + size] = key;
- index++;
- }
-
- return function mapToEntries(map) {
- size = map.size;
- index = 0;
- var ret = new Array(map.size * 2);
- map.forEach(extractEntry, ret);
- return ret;
- };
- })();
-
- var entriesToMap = function(entries) {
- var ret = new Es6Map();
- var length = entries.length / 2 | 0;
- for (var i = 0; i < length; ++i) {
- var key = entries[length + i];
- var value = entries[i];
- ret.set(key, value);
- }
- return ret;
- };
-
- function PropertiesPromiseArray(obj) {
- var isMap = false;
- var entries;
- if (Es6Map !== undefined && obj instanceof Es6Map) {
- entries = mapToEntries(obj);
- isMap = true;
- } else {
- var keys = es5.keys(obj);
- var len = keys.length;
- entries = new Array(len * 2);
- for (var i = 0; i < len; ++i) {
- var key = keys[i];
- entries[i] = obj[key];
- entries[i + len] = key;
- }
- }
- this.constructor$(entries);
- this._isMap = isMap;
- this._init$(undefined, isMap ? -6 : -3);
- }
- util.inherits(PropertiesPromiseArray, PromiseArray);
-
- PropertiesPromiseArray.prototype._init = function () {};
-
- PropertiesPromiseArray.prototype._promiseFulfilled = function (value, index) {
- this._values[index] = value;
- var totalResolved = ++this._totalResolved;
- if (totalResolved >= this._length) {
- var val;
- if (this._isMap) {
- val = entriesToMap(this._values);
- } else {
- val = {};
- var keyOffset = this.length();
- for (var i = 0, len = this.length(); i < len; ++i) {
- val[this._values[i + keyOffset]] = this._values[i];
- }
- }
- this._resolve(val);
- return true;
- }
- return false;
- };
-
- PropertiesPromiseArray.prototype.shouldCopyValues = function () {
- return false;
- };
-
- PropertiesPromiseArray.prototype.getActualLength = function (len) {
- return len >> 1;
- };
-
- function props(promises) {
- var ret;
- var castValue = tryConvertToPromise(promises);
-
- if (!isObject(castValue)) {
- return apiRejection("cannot await properties of a non-object\u000a\u000a See http://goo.gl/MqrFmX\u000a");
- } else if (castValue instanceof Promise) {
- ret = castValue._then(
- Promise.props, undefined, undefined, undefined, undefined);
- } else {
- ret = new PropertiesPromiseArray(castValue).promise();
- }
-
- if (castValue instanceof Promise) {
- ret._propagateFrom(castValue, 2);
- }
- return ret;
- }
-
- Promise.prototype.props = function () {
- return props(this);
- };
-
- Promise.props = function (promises) {
- return props(promises);
- };
- };
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