michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * THIS MODULE IS DEPRECATED. IMPORT "Promise.jsm" INSTEAD.
michael@0:  */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: this.Promise = {};
michael@0: 
michael@0: if (typeof(require) === "function") {
michael@0:   module.exports = Promise;
michael@0: } else {
michael@0:   this.EXPORTED_SYMBOLS = ["Promise"];
michael@0: }
michael@0: 
michael@0: function fulfilled(value) {
michael@0:   return { then: function then(fulfill) { fulfill(value); } };
michael@0: }
michael@0: 
michael@0: function rejected(reason) {
michael@0:   return { then: function then(fulfill, reject) { reject(reason); } };
michael@0: }
michael@0: 
michael@0: function isPromise(value) {
michael@0:   return value && typeof(value.then) === 'function';
michael@0: }
michael@0: 
michael@0: function defer() {
michael@0:   var observers = [];
michael@0:   var result = null;
michael@0:   var promise = {
michael@0:     then: function then(onFulfill, onError) {
michael@0:       var deferred = defer();
michael@0: 
michael@0:       function resolve(value) {
michael@0:         try {
michael@0:           deferred.resolve(onFulfill ? onFulfill(value) : value);
michael@0:         } catch (error) {
michael@0:           deferred.resolve(rejected(error));
michael@0:         }
michael@0:       }
michael@0: 
michael@0:       function reject(reason) {
michael@0:         try {
michael@0:           if (onError) deferred.resolve(onError(reason));
michael@0:           else deferred.resolve(rejected(reason));
michael@0:         } catch (error) {
michael@0:           deferred.resolve(rejected(error));
michael@0:         }
michael@0:       }
michael@0: 
michael@0:       if (observers) {
michael@0:         observers.push({ resolve: resolve, reject: reject });
michael@0:       } else {
michael@0:         result.then(resolve, reject);
michael@0:       }
michael@0: 
michael@0:       return deferred.promise;
michael@0:     }
michael@0:   };
michael@0: 
michael@0:   var deferred = {
michael@0:     promise: promise,
michael@0:     resolve: function resolve(value) {
michael@0:       if (!result) {
michael@0:         result = isPromise(value) ? value : fulfilled(value);
michael@0:         while (observers.length) {
michael@0:           var observer = observers.shift();
michael@0:           result.then(observer.resolve, observer.reject);
michael@0:         }
michael@0:         observers = null;
michael@0:       }
michael@0:     },
michael@0:     reject: function reject(reason) {
michael@0:       deferred.resolve(rejected(reason));
michael@0:     }
michael@0:   };
michael@0: 
michael@0:   return deferred;
michael@0: }
michael@0: Promise.defer = defer;
michael@0: 
michael@0: function resolve(value) {
michael@0:   var deferred = defer();
michael@0:   deferred.resolve(value);
michael@0:   return deferred.promise;
michael@0: }
michael@0: Promise.resolve = resolve;
michael@0: 
michael@0: function reject(reason) {
michael@0:   var deferred = defer();
michael@0:   deferred.reject(reason);
michael@0:   return deferred.promise;
michael@0: }
michael@0: Promise.reject = reject;
michael@0: 
michael@0: var promised = (function() {
michael@0:   var call = Function.call;
michael@0:   var concat = Array.prototype.concat;
michael@0:   function execute(args) { return call.apply(call, args) }
michael@0:   function promisedConcat(promises, unknown) {
michael@0:     return promises.then(function(values) {
michael@0:       return resolve(unknown).then(function(value) {
michael@0:         return values.concat([ value ]);
michael@0:       });
michael@0:     });
michael@0:   }
michael@0:   return function promised(f) {
michael@0:     return function promised() {
michael@0:       return concat.apply([ f, this ], arguments).
michael@0:         reduce(promisedConcat, resolve([])).
michael@0:         then(execute);
michael@0:     };
michael@0:   }
michael@0: })();
michael@0: Promise.all = promised(Array);