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value);\n } else {\n lib$es6$promise$$internal$$fulfill(promise, value);\n }\n }, function(reason) {\n if (sealed) { return; }\n sealed = true;\n\n lib$es6$promise$$internal$$reject(promise, reason);\n }, 'Settle: ' + (promise._label || ' unknown promise'));\n\n if (!sealed && error) {\n sealed = true;\n lib$es6$promise$$internal$$reject(promise, error);\n }\n }, promise);\n }\n\n function lib$es6$promise$$internal$$handleOwnThenable(promise, thenable) {\n if (thenable._state === lib$es6$promise$$internal$$FULFILLED) {\n lib$es6$promise$$internal$$fulfill(promise, thenable._result);\n } else if (thenable._state === lib$es6$promise$$internal$$REJECTED) {\n lib$es6$promise$$internal$$reject(promise, thenable._result);\n } else {\n lib$es6$promise$$internal$$subscribe(thenable, undefined, function(value) {\n lib$es6$promise$$internal$$resolve(promise, value);\n }, function(reason) {\n lib$es6$promise$$internal$$reject(promise, reason);\n });\n }\n }\n\n function lib$es6$promise$$internal$$handleMaybeThenable(promise, maybeThenable) {\n if (maybeThenable.constructor === promise.constructor) {\n lib$es6$promise$$internal$$handleOwnThenable(promise, maybeThenable);\n } else {\n var then = lib$es6$promise$$internal$$getThen(maybeThenable);\n\n if (then === lib$es6$promise$$internal$$GET_THEN_ERROR) {\n lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$GET_THEN_ERROR.error);\n } else if (then === undefined) {\n lib$es6$promise$$internal$$fulfill(promise, maybeThenable);\n } else if (lib$es6$promise$utils$$isFunction(then)) {\n lib$es6$promise$$internal$$handleForeignThenable(promise, maybeThenable, then);\n } else {\n lib$es6$promise$$internal$$fulfill(promise, maybeThenable);\n }\n }\n }\n\n function lib$es6$promise$$internal$$resolve(promise, value) {\n if (promise === value) {\n lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$selfFullfillment());\n } else if (lib$es6$promise$utils$$objectOrFunction(value)) {\n lib$es6$promise$$internal$$handleMaybeThenable(promise, value);\n } else {\n lib$es6$promise$$internal$$fulfill(promise, value);\n }\n }\n\n function lib$es6$promise$$internal$$publishRejection(promise) {\n if (promise._onerror) {\n promise._onerror(promise._result);\n }\n\n lib$es6$promise$$internal$$publish(promise);\n }\n\n function lib$es6$promise$$internal$$fulfill(promise, value) {\n if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }\n\n promise._result = value;\n promise._state = lib$es6$promise$$internal$$FULFILLED;\n\n if (promise._subscribers.length !== 0) {\n lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, promise);\n }\n }\n\n function lib$es6$promise$$internal$$reject(promise, reason) {\n if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }\n promise._state = lib$es6$promise$$internal$$REJECTED;\n promise._result = reason;\n\n lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publishRejection, promise);\n }\n\n function lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection) {\n var subscribers = parent._subscribers;\n var length = subscribers.length;\n\n parent._onerror = null;\n\n subscribers[length] = child;\n subscribers[length + lib$es6$promise$$internal$$FULFILLED] = onFulfillment;\n subscribers[length + lib$es6$promise$$internal$$REJECTED] = onRejection;\n\n if (length === 0 && parent._state) {\n lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, parent);\n }\n }\n\n function lib$es6$promise$$internal$$publish(promise) {\n var subscribers = promise._subscribers;\n var settled = promise._state;\n\n if (subscribers.length === 0) { return; }\n\n var child, callback, detail = promise._result;\n\n for (var i = 0; i < subscribers.length; i += 3) {\n child = subscribers[i];\n callback = subscribers[i + settled];\n\n if (child) {\n lib$es6$promise$$internal$$invokeCallback(settled, child, callback, detail);\n } else {\n callback(detail);\n }\n }\n\n promise._subscribers.length = 0;\n }\n\n function lib$es6$promise$$internal$$ErrorObject() {\n this.error = null;\n }\n\n var lib$es6$promise$$internal$$TRY_CATCH_ERROR = new lib$es6$promise$$internal$$ErrorObject();\n\n function lib$es6$promise$$internal$$tryCatch(callback, detail) {\n try {\n return callback(detail);\n } catch(e) {\n lib$es6$promise$$internal$$TRY_CATCH_ERROR.error = e;\n return lib$es6$promise$$internal$$TRY_CATCH_ERROR;\n }\n }\n\n function lib$es6$promise$$internal$$invokeCallback(settled, promise, callback, detail) {\n var hasCallback = lib$es6$promise$utils$$isFunction(callback),\n value, error, succeeded, failed;\n\n if (hasCallback) {\n value = lib$es6$promise$$internal$$tryCatch(callback, detail);\n\n if (value === lib$es6$promise$$internal$$TRY_CATCH_ERROR) {\n failed = true;\n error = value.error;\n value = null;\n } else {\n succeeded = true;\n }\n\n if (promise === value) {\n lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$cannotReturnOwn());\n return;\n }\n\n } else {\n value = detail;\n succeeded = true;\n }\n\n if (promise._state !== lib$es6$promise$$internal$$PENDING) {\n // noop\n } else if (hasCallback && succeeded) {\n lib$es6$promise$$internal$$resolve(promise, value);\n } else if (failed) {\n lib$es6$promise$$internal$$reject(promise, error);\n } else if (settled === lib$es6$promise$$internal$$FULFILLED) {\n lib$es6$promise$$internal$$fulfill(promise, value);\n } else if (settled === lib$es6$promise$$internal$$REJECTED) {\n lib$es6$promise$$internal$$reject(promise, value);\n }\n }\n\n function lib$es6$promise$$internal$$initializePromise(promise, resolver) {\n try {\n resolver(function resolvePromise(value){\n lib$es6$promise$$internal$$resolve(promise, value);\n }, function rejectPromise(reason) {\n lib$es6$promise$$internal$$reject(promise, reason);\n });\n } catch(e) {\n lib$es6$promise$$internal$$reject(promise, e);\n }\n }\n\n function lib$es6$promise$enumerator$$Enumerator(Constructor, input) {\n var enumerator = this;\n\n enumerator._instanceConstructor = Constructor;\n enumerator.promise = new Constructor(lib$es6$promise$$internal$$noop);\n\n if (enumerator._validateInput(input)) {\n enumerator._input = input;\n enumerator.length = input.length;\n enumerator._remaining = input.length;\n\n enumerator._init();\n\n if (enumerator.length === 0) {\n lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);\n } else {\n enumerator.length = enumerator.length || 0;\n enumerator._enumerate();\n if (enumerator._remaining === 0) {\n lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);\n }\n }\n } else {\n lib$es6$promise$$internal$$reject(enumerator.promise, enumerator._validationError());\n }\n }\n\n lib$es6$promise$enumerator$$Enumerator.prototype._validateInput = function(input) {\n return lib$es6$promise$utils$$isArray(input);\n };\n\n lib$es6$promise$enumerator$$Enumerator.prototype._validationError = function() {\n return new Error('Array Methods must be provided an Array');\n };\n\n lib$es6$promise$enumerator$$Enumerator.prototype._init = function() {\n this._result = new Array(this.length);\n };\n\n var lib$es6$promise$enumerator$$default = lib$es6$promise$enumerator$$Enumerator;\n\n lib$es6$promise$enumerator$$Enumerator.prototype._enumerate = function() {\n var enumerator = this;\n\n var length = enumerator.length;\n var promise = enumerator.promise;\n var input = enumerator._input;\n\n for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {\n enumerator._eachEntry(input[i], i);\n }\n };\n\n lib$es6$promise$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {\n var enumerator = this;\n var c = enumerator._instanceConstructor;\n\n if (lib$es6$promise$utils$$isMaybeThenable(entry)) {\n if (entry.constructor === c && entry._state !== lib$es6$promise$$internal$$PENDING) {\n entry._onerror = null;\n enumerator._settledAt(entry._state, i, entry._result);\n } else {\n enumerator._willSettleAt(c.resolve(entry), i);\n }\n } else {\n enumerator._remaining--;\n enumerator._result[i] = entry;\n }\n };\n\n lib$es6$promise$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {\n var enumerator = this;\n var promise = enumerator.promise;\n\n if (promise._state === lib$es6$promise$$internal$$PENDING) {\n enumerator._remaining--;\n\n if (state === lib$es6$promise$$internal$$REJECTED) {\n lib$es6$promise$$internal$$reject(promise, value);\n } else {\n enumerator._result[i] = value;\n }\n }\n\n if (enumerator._remaining === 0) {\n lib$es6$promise$$internal$$fulfill(promise, enumerator._result);\n }\n };\n\n lib$es6$promise$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {\n var enumerator = this;\n\n lib$es6$promise$$internal$$subscribe(promise, undefined, function(value) {\n enumerator._settledAt(lib$es6$promise$$internal$$FULFILLED, i, value);\n }, function(reason) {\n enumerator._settledAt(lib$es6$promise$$internal$$REJECTED, i, reason);\n });\n };\n function lib$es6$promise$promise$all$$all(entries) {\n return new lib$es6$promise$enumerator$$default(this, entries).promise;\n }\n var lib$es6$promise$promise$all$$default = lib$es6$promise$promise$all$$all;\n function lib$es6$promise$promise$race$$race(entries) {\n /*jshint validthis:true */\n var Constructor = this;\n\n var promise = new Constructor(lib$es6$promise$$internal$$noop);\n\n if (!lib$es6$promise$utils$$isArray(entries)) {\n lib$es6$promise$$internal$$reject(promise, new TypeError('You must pass an array to race.'));\n return promise;\n }\n\n var length = entries.length;\n\n function onFulfillment(value) {\n lib$es6$promise$$internal$$resolve(promise, value);\n }\n\n function onRejection(reason) {\n lib$es6$promise$$internal$$reject(promise, reason);\n }\n\n for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {\n lib$es6$promise$$internal$$subscribe(Constructor.resolve(entries[i]), undefined, onFulfillment, onRejection);\n }\n\n return promise;\n }\n var lib$es6$promise$promise$race$$default = lib$es6$promise$promise$race$$race;\n function lib$es6$promise$promise$resolve$$resolve(object) {\n /*jshint validthis:true */\n var Constructor = this;\n\n if (object && typeof object === 'object' && object.constructor === Constructor) {\n return object;\n }\n\n var promise = new Constructor(lib$es6$promise$$internal$$noop);\n lib$es6$promise$$internal$$resolve(promise, object);\n return promise;\n }\n var lib$es6$promise$promise$resolve$$default = lib$es6$promise$promise$resolve$$resolve;\n function lib$es6$promise$promise$reject$$reject(reason) {\n /*jshint validthis:true */\n var Constructor = this;\n var promise = new Constructor(lib$es6$promise$$internal$$noop);\n lib$es6$promise$$internal$$reject(promise, reason);\n return promise;\n }\n var lib$es6$promise$promise$reject$$default = lib$es6$promise$promise$reject$$reject;\n\n var lib$es6$promise$promise$$counter = 0;\n\n function lib$es6$promise$promise$$needsResolver() {\n throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');\n }\n\n function lib$es6$promise$promise$$needsNew() {\n throw new TypeError(\"Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.\");\n }\n\n var lib$es6$promise$promise$$default = lib$es6$promise$promise$$Promise;\n /**\n Promise objects represent the eventual result of an asynchronous operation. The\n primary way of interacting with a promise is through its `then` method, which\n registers callbacks to receive either a promise's eventual value or the reason\n why the promise cannot be fulfilled.\n\n Terminology\n -----------\n\n - `promise` is an object or function with a `then` method whose behavior conforms to this specification.\n - `thenable` is an object or function that defines a `then` method.\n - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).\n - `exception` is a value that is thrown using the throw statement.\n - `reason` is a value that indicates why a promise was rejected.\n - `settled` the final resting state of a promise, fulfilled or rejected.\n\n A promise can be in one of three states: pending, fulfilled, or rejected.\n\n Promises that are fulfilled have a fulfillment value and are in the fulfilled\n state. Promises that are rejected have a rejection reason and are in the\n rejected state. A fulfillment value is never a thenable.\n\n Promises can also be said to *resolve* a value. If this value is also a\n promise, then the original promise's settled state will match the value's\n settled state. So a promise that *resolves* a promise that rejects will\n itself reject, and a promise that *resolves* a promise that fulfills will\n itself fulfill.\n\n\n Basic Usage:\n ------------\n\n ```js\n var promise = new Promise(function(resolve, reject) {\n // on success\n resolve(value);\n\n // on failure\n reject(reason);\n });\n\n promise.then(function(value) {\n // on fulfillment\n }, function(reason) {\n // on rejection\n });\n ```\n\n Advanced Usage:\n ---------------\n\n Promises shine when abstracting away asynchronous interactions such as\n `XMLHttpRequest`s.\n\n ```js\n function getJSON(url) {\n return new Promise(function(resolve, reject){\n var xhr = new XMLHttpRequest();\n\n xhr.open('GET', url);\n xhr.onreadystatechange = handler;\n xhr.responseType = 'json';\n xhr.setRequestHeader('Accept', 'application/json');\n xhr.send();\n\n function handler() {\n if (this.readyState === this.DONE) {\n if (this.status === 200) {\n resolve(this.response);\n } else {\n reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));\n }\n }\n };\n });\n }\n\n getJSON('/posts.json').then(function(json) {\n // on fulfillment\n }, function(reason) {\n // on rejection\n });\n ```\n\n Unlike callbacks, promises are great composable primitives.\n\n ```js\n Promise.all([\n getJSON('/posts'),\n getJSON('/comments')\n ]).then(function(values){\n values[0] // => postsJSON\n values[1] // => commentsJSON\n\n return values;\n });\n ```\n\n @class Promise\n @param {function} resolver\n Useful for tooling.\n @constructor\n */\n function lib$es6$promise$promise$$Promise(resolver) {\n this._id = lib$es6$promise$promise$$counter++;\n this._state = undefined;\n this._result = undefined;\n this._subscribers = [];\n\n if (lib$es6$promise$$internal$$noop !== resolver) {\n if (!lib$es6$promise$utils$$isFunction(resolver)) {\n lib$es6$promise$promise$$needsResolver();\n }\n\n if (!(this instanceof lib$es6$promise$promise$$Promise)) {\n lib$es6$promise$promise$$needsNew();\n }\n\n lib$es6$promise$$internal$$initializePromise(this, resolver);\n }\n }\n\n lib$es6$promise$promise$$Promise.all = lib$es6$promise$promise$all$$default;\n lib$es6$promise$promise$$Promise.race = lib$es6$promise$promise$race$$default;\n lib$es6$promise$promise$$Promise.resolve = lib$es6$promise$promise$resolve$$default;\n lib$es6$promise$promise$$Promise.reject = lib$es6$promise$promise$reject$$default;\n lib$es6$promise$promise$$Promise._setScheduler = lib$es6$promise$asap$$setScheduler;\n lib$es6$promise$promise$$Promise._setAsap = lib$es6$promise$asap$$setAsap;\n lib$es6$promise$promise$$Promise._asap = lib$es6$promise$asap$$asap;\n\n lib$es6$promise$promise$$Promise.prototype = {\n constructor: lib$es6$promise$promise$$Promise,\n\n /**\n The primary way of interacting with a promise is through its `then` method,\n which registers callbacks to receive either a promise's eventual value or the\n reason why the promise cannot be fulfilled.\n\n ```js\n findUser().then(function(user){\n // user is available\n }, function(reason){\n // user is unavailable, and you are given the reason why\n });\n ```\n\n Chaining\n --------\n\n The return value of `then` is itself a promise. This second, 'downstream'\n promise is resolved with the return value of the first promise's fulfillment\n or rejection handler, or rejected if the handler throws an exception.\n\n ```js\n findUser().then(function (user) {\n return user.name;\n }, function (reason) {\n return 'default name';\n }).then(function (userName) {\n // If `findUser` fulfilled, `userName` will be the user's name, otherwise it\n // will be `'default name'`\n });\n\n findUser().then(function (user) {\n throw new Error('Found user, but still unhappy');\n }, function (reason) {\n throw new Error('`findUser` rejected and we're unhappy');\n }).then(function (value) {\n // never reached\n }, function (reason) {\n // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.\n // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.\n });\n ```\n If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.\n\n ```js\n findUser().then(function (user) {\n throw new PedagogicalException('Upstream error');\n }).then(function (value) {\n // never reached\n }).then(function (value) {\n // never reached\n }, function (reason) {\n // The `PedgagocialException` is propagated all the way down to here\n });\n ```\n\n Assimilation\n ------------\n\n Sometimes the value you want to propagate to a downstream promise can only be\n retrieved asynchronously. This can be achieved by returning a promise in the\n fulfillment or rejection handler. The downstream promise will then be pending\n until the returned promise is settled. This is called *assimilation*.\n\n ```js\n findUser().then(function (user) {\n return findCommentsByAuthor(user);\n }).then(function (comments) {\n // The user's comments are now available\n });\n ```\n\n If the assimliated promise rejects, then the downstream promise will also reject.\n\n ```js\n findUser().then(function (user) {\n return findCommentsByAuthor(user);\n }).then(function (comments) {\n // If `findCommentsByAuthor` fulfills, we'll have the value here\n }, function (reason) {\n // If `findCommentsByAuthor` rejects, we'll have the reason here\n });\n ```\n\n Simple Example\n --------------\n\n Synchronous Example\n\n ```javascript\n var result;\n\n try {\n result = findResult();\n // success\n } catch(reason) {\n // failure\n }\n ```\n\n Errback Example\n\n ```js\n findResult(function(result, err){\n if (err) {\n // failure\n } else {\n // success\n }\n });\n ```\n\n Promise Example;\n\n ```javascript\n findResult().then(function(result){\n // success\n }, function(reason){\n // failure\n });\n ```\n\n Advanced Example\n --------------\n\n Synchronous Example\n\n ```javascript\n var author, books;\n\n try {\n author = findAuthor();\n books = findBooksByAuthor(author);\n // success\n } catch(reason) {\n // failure\n }\n ```\n\n Errback Example\n\n ```js\n\n function foundBooks(books) {\n\n }\n\n function failure(reason) {\n\n }\n\n findAuthor(function(author, err){\n if (err) {\n failure(err);\n // failure\n } else {\n try {\n findBoooksByAuthor(author, function(books, err) {\n if (err) {\n failure(err);\n } else {\n try {\n foundBooks(books);\n } catch(reason) {\n failure(reason);\n }\n }\n });\n } catch(error) {\n failure(err);\n }\n // success\n }\n });\n ```\n\n Promise Example;\n\n ```javascript\n findAuthor().\n then(findBooksByAuthor).\n then(function(books){\n // found books\n }).catch(function(reason){\n // something went wrong\n });\n ```\n\n @method then\n @param {Function} onFulfilled\n @param {Function} onRejected\n Useful for tooling.\n @return {Promise}\n */\n then: function(onFulfillment, onRejection) {\n var parent = this;\n var state = parent._state;\n\n if (state === lib$es6$promise$$internal$$FULFILLED && !onFulfillment || state === lib$es6$promise$$internal$$REJECTED && !onRejection) {\n return this;\n }\n\n var child = new this.constructor(lib$es6$promise$$internal$$noop);\n var result = parent._result;\n\n if (state) {\n var callback = arguments[state - 1];\n lib$es6$promise$asap$$asap(function(){\n lib$es6$promise$$internal$$invokeCallback(state, child, callback, result);\n });\n } else {\n lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection);\n }\n\n return child;\n },\n\n /**\n `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same\n as the catch block of a try/catch statement.\n\n ```js\n function findAuthor(){\n throw new Error('couldn't find that author');\n }\n\n // synchronous\n try {\n findAuthor();\n } catch(reason) {\n // something went wrong\n }\n\n // async with promises\n findAuthor().catch(function(reason){\n // something went wrong\n });\n ```\n\n @method catch\n @param {Function} onRejection\n Useful for tooling.\n @return {Promise}\n */\n 'catch': function(onRejection) {\n return this.then(null, onRejection);\n }\n };\n function lib$es6$promise$polyfill$$polyfill() {\n var local;\n\n if (typeof global !== 'undefined') {\n local = global;\n } else if (typeof self !== 'undefined') {\n local = self;\n } else {\n try {\n local = Function('return this')();\n } catch (e) {\n throw new Error('polyfill failed because global object is unavailable in this environment');\n }\n }\n\n var P = local.Promise;\n\n if (P && Object.prototype.toString.call(P.resolve()) === '[object Promise]' && !P.cast) {\n return;\n }\n\n local.Promise = lib$es6$promise$promise$$default;\n }\n var lib$es6$promise$polyfill$$default = lib$es6$promise$polyfill$$polyfill;\n\n var lib$es6$promise$umd$$ES6Promise = {\n 'Promise': lib$es6$promise$promise$$default,\n 'polyfill': lib$es6$promise$polyfill$$default\n };\n\n /* global define:true module:true window: true */\n if (typeof define === 'function' && define['amd']) {\n define('lib/polyfill/es6-promise',[],function() { return lib$es6$promise$umd$$ES6Promise; });\n } else if (typeof module !== 'undefined' && module['exports']) {\n module['exports'] = lib$es6$promise$umd$$ES6Promise;\n } else if (typeof this !== 'undefined') {\n this['ES6Promise'] = lib$es6$promise$umd$$ES6Promise;\n }\n\n lib$es6$promise$polyfill$$default();\n}).call(this);\n\n\n","\n/*\n * This program is free software; you can redistribute it and/or\n * modify it under the terms of the GNU General Public License\n * as published by the Free Software Foundation; under version 2\n * of the License (non-upgradable).\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program; if not, write to the Free Software\n * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\n *\n * Copyright (c) 2015 Open Assessment Technologies SA\n */\n\n/**\n * Wrap the Promise Polyfill\n *\n * @author Bertrand Chevrier \n */\ndefine('core/promise',['lib/polyfill/es6-promise'], function(es6Promise){\n 'use strict';\n\n /**\n * @exports core/promise\n */\n return window.Promise || es6Promise.Promise;\n});\n\n","/*\n * This program is free software; you can redistribute it and/or\n * modify it under the terms of the GNU General Public License\n * as published by the Free Software Foundation; under version 2\n * of the License (non-upgradable).\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program; if not, write to the Free Software\n * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\n *\n * Copyright (c) 2016 (original work) Open Assessment Technlogies SA (under the project TAO-PRODUCT);\n *\n */\n/**\n * Enables to register providers to a target.\n *\n * @author Sam \n * @author Bertrand Chevrier \n */\ndefine('core/providerRegistry',['lodash'], function (_) {\n 'use strict';\n\n /**\n * Transfers the target into a a provider registry\n * It adds two methods registerProvider() and getProvider();\n *\n * @param {Object} target\n * @param {Function} [validator] - a function to validate the provider to be registered\n * \n * @returns {Object} the target itself\n */\n function providerRegistry(target, validator) {\n\n var _providers = {};\n target = target || {};\n\n\n /**\n * Registers a provider into the provider registry.\n * The provider provides the behavior required by the target object.\n *\n * @param {String} name - the provider name will be used to select the provider while instantiating the target object\n *\n * @param {Object} provider - the Provider as a plain object. The target object forwards, encapsulates and delegates calls to the provider.\n * @param {Function} provider.init - the provider initializes the target object from it's config\n *\n * @returns {registerProvider}\n *\n * @throws TypeError when a wrong provider is given or an empty name.\n */\n function registerProvider(name, provider) {\n\n var valid = true;\n\n //type checking\n if (!_.isString(name) || name.length <= 0) {\n throw new TypeError('It is required to give a name to your provider.');\n }\n if (!_.isPlainObject(provider) || (!_.isFunction(provider.init))) {\n throw new TypeError('A provider is an object that contains at least an init function.');\n }\n valid = validator && _.isFunction(validator) ? validator(provider) : valid;\n\n if (valid) {\n _providers[name] = provider;\n }\n\n return this;\n }\n\n /**\n * Gets a registered provider by its name\n *\n * @param {String} providerName\n *\n * @returns {Object} provider\n */\n function getProvider(providerName) {\n\n var provider;\n\n //check a provider is available\n if (!_providers || _.size(_providers) === 0) {\n throw new Error('No provider registered');\n }\n\n if (_.isString(providerName) && providerName.length > 0) {\n provider = _providers[providerName];\n } else if (_.size(_providers) === 1) {\n\n //if there is only one provider, then we take this one\n providerName = _.keys(_providers)[0];\n provider = _providers[providerName];\n }\n\n //now we should have a provider\n if (!provider) {\n throw new Error('No candidate found for the provider');\n }\n\n return provider;\n }\n\n /**\n * Clears the registered providers\n *\n * @returns {registerProvider}\n */\n function clearProviders() {\n _providers = {};\n return this;\n }\n\n target.registerProvider = registerProvider;\n target.getProvider = getProvider;\n target.clearProviders = clearProviders;\n\n return target;\n }\n\n return providerRegistry;\n});\n\n","/**\n * This program is free software; you can redistribute it and/or\n * modify it under the terms of the GNU General Public License\n * as published by the Free Software Foundation; under version 2\n * of the License (non-upgradable).\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program; if not, write to the Free Software\n * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\n *\n * Copyright (c) 2016 (original work) Open Assessment Technologies SA ;\n */\n/**\n * @author Jean-Sébastien Conan \n */\ndefine('core/delegator',[\n 'lodash'\n], function (_) {\n 'use strict';\n \n var defaults = {\n name: 'provided',\n eventifier: true\n };\n\n var _slice = [].slice;\n\n /**\n * Creates a function that delegates api calls to an provider\n * @param {Object} api - The api providing the calls\n * @param {Object} provider - The provider on which delegate the calls\n * @param {Object} [config] - An optional configuration set\n * @param {String} [config.name] - The name of the provider\n * @param {Boolean} [config.eventifier] - Enable the eventifier support (default: true)\n * @param {Boolean} [config.forward] - Forward the calls to the provider instead of delegate (default: false)\n * @param {Function} [config.defaultProvider] - An optional default delegated function called if the provider do not have the requested target.\n * @param {Function} [config.wrapper] - An optional function that will wrap the response\n * @param {Boolean} [config.required] - Throws exception if a delegated method is missing (default: false)\n * @returns {delegate} - The delegate function\n */\n function delegator(api, provider, config) {\n var extendedConfig = _.defaults(config || {}, defaults);\n var eventifier = !!(extendedConfig.eventifier && api && api.trigger);\n var context = extendedConfig.forward ? provider : api;\n var defaultProvider = _.isFunction(extendedConfig.defaultProvider) ? extendedConfig.defaultProvider : _.noop;\n var wrapper = _.isFunction(extendedConfig.wrapper) ? extendedConfig.wrapper : null;\n var name = extendedConfig.name;\n\n if (extendedConfig.required) {\n defaultProvider = null;\n }\n\n /**\n * Delegates a function call from the api to the provider.\n * If the api supports eventifier, fires the related event\n *\n * @param {String} fnName - The name of the delegated method to call\n * @param {Object} ... - Following parameters will be forwarded as is\n * @returns {Object} - The delegated method must return a response\n * @private\n * @throws Error\n */\n function delegate(fnName) {\n var response, args;\n\n if (provider) {\n if (_.isFunction(provider[fnName]) || defaultProvider) {\n // need real array of params, even if empty\n args = _slice.call(arguments, 1);\n\n // delegate the call to the provider\n response = (provider[fnName] || defaultProvider).apply(context, args);\n\n if (wrapper) {\n response = wrapper(response);\n }\n\n // if supported fires the method related event\n if (eventifier) {\n // the response has to be provided as first argument in all events\n api.trigger.apply(api, [fnName, response].concat(args));\n }\n } else {\n throw new Error('There is no method called ' + fnName + ' in the ' + name + ' provider!');\n }\n } else {\n throw new Error('There is no ' + name + ' provider!');\n }\n\n return response;\n }\n\n return delegate;\n }\n\n return delegator;\n});\n\n","(function () {\n\n var async = {};\n\n // global on the server, window in the browser\n var root, previous_async;\n\n root = this;\n if (root != null) {\n previous_async = root.async;\n }\n\n async.noConflict = function () {\n root.async = previous_async;\n return async;\n };\n\n function only_once(fn) {\n var called = false;\n return function() {\n if (called) throw new Error(\"Callback was already called.\");\n called = true;\n fn.apply(root, arguments);\n }\n }\n\n //// cross-browser compatiblity functions ////\n\n var _each = function (arr, iterator) {\n if (arr.forEach) {\n return arr.forEach(iterator);\n }\n for (var i = 0; i < arr.length; i += 1) {\n iterator(arr[i], i, arr);\n }\n };\n\n var _map = function (arr, iterator) {\n if (arr.map) {\n return arr.map(iterator);\n }\n var results = [];\n _each(arr, function (x, i, a) {\n results.push(iterator(x, i, a));\n });\n return results;\n };\n\n var _reduce = function (arr, iterator, memo) {\n if (arr.reduce) {\n return arr.reduce(iterator, memo);\n }\n _each(arr, function (x, i, a) {\n memo = iterator(memo, x, i, a);\n });\n return memo;\n };\n\n var _keys = function (obj) {\n if (Object.keys) {\n return Object.keys(obj);\n }\n var keys = [];\n for (var k in obj) {\n if (obj.hasOwnProperty(k)) {\n keys.push(k);\n }\n }\n return keys;\n };\n\n //// exported async module functions ////\n\n //// nextTick implementation with browser-compatible fallback ////\n if (typeof process === 'undefined' || !(process.nextTick)) {\n if (typeof setImmediate === 'function') {\n async.nextTick = function (fn) {\n // not a direct alias for IE10 compatibility\n setImmediate(fn);\n };\n async.setImmediate = async.nextTick;\n }\n else {\n async.nextTick = function (fn) {\n setTimeout(fn, 0);\n };\n async.setImmediate = async.nextTick;\n }\n }\n else {\n async.nextTick = process.nextTick;\n if (typeof setImmediate !== 'undefined') {\n async.setImmediate = function (fn) {\n // not a direct alias for IE10 compatibility\n setImmediate(fn);\n };\n }\n else {\n async.setImmediate = async.nextTick;\n }\n }\n\n async.each = function (arr, iterator, callback) {\n callback = callback || function () {};\n if (!arr.length) {\n return callback();\n }\n var completed = 0;\n _each(arr, function (x) {\n iterator(x, only_once(function (err) {\n if (err) {\n callback(err);\n callback = function () {};\n }\n else {\n completed += 1;\n if (completed >= arr.length) {\n callback(null);\n }\n }\n }));\n });\n };\n async.forEach = async.each;\n\n async.eachSeries = function (arr, iterator, callback) {\n callback = callback || function () {};\n if (!arr.length) {\n return callback();\n }\n var completed = 0;\n var iterate = function () {\n iterator(arr[completed], function (err) {\n if (err) {\n callback(err);\n callback = function () {};\n }\n else {\n completed += 1;\n if (completed >= arr.length) {\n callback(null);\n }\n else {\n iterate();\n }\n }\n });\n };\n iterate();\n };\n async.forEachSeries = async.eachSeries;\n\n async.eachLimit = function (arr, limit, iterator, callback) {\n var fn = _eachLimit(limit);\n fn.apply(null, [arr, iterator, callback]);\n };\n async.forEachLimit = async.eachLimit;\n\n var _eachLimit = function (limit) {\n\n return function (arr, iterator, callback) {\n callback = callback || function () {};\n if (!arr.length || limit <= 0) {\n return callback();\n }\n var completed = 0;\n var started = 0;\n var running = 0;\n\n (function replenish () {\n if (completed >= arr.length) {\n return callback();\n }\n\n while (running < limit && started < arr.length) {\n started += 1;\n running += 1;\n iterator(arr[started - 1], function (err) {\n if (err) {\n callback(err);\n callback = function () {};\n }\n else {\n completed += 1;\n running -= 1;\n if (completed >= arr.length) {\n callback();\n }\n else {\n replenish();\n }\n }\n });\n }\n })();\n };\n };\n\n\n var doParallel = function (fn) {\n return function () {\n var args = Array.prototype.slice.call(arguments);\n return fn.apply(null, [async.each].concat(args));\n };\n };\n var doParallelLimit = function(limit, fn) {\n return function () {\n var args = Array.prototype.slice.call(arguments);\n return fn.apply(null, [_eachLimit(limit)].concat(args));\n };\n };\n var doSeries = function (fn) {\n return function () {\n var args = Array.prototype.slice.call(arguments);\n return fn.apply(null, [async.eachSeries].concat(args));\n };\n };\n\n\n var _asyncMap = function (eachfn, arr, iterator, callback) {\n var results = [];\n arr = _map(arr, function (x, i) {\n return {index: i, value: x};\n });\n eachfn(arr, function (x, callback) {\n iterator(x.value, function (err, v) {\n results[x.index] = v;\n callback(err);\n });\n }, function (err) {\n callback(err, results);\n });\n };\n async.map = doParallel(_asyncMap);\n async.mapSeries = doSeries(_asyncMap);\n async.mapLimit = function (arr, limit, iterator, callback) {\n return _mapLimit(limit)(arr, iterator, callback);\n };\n\n var _mapLimit = function(limit) {\n return doParallelLimit(limit, _asyncMap);\n };\n\n // reduce only has a series version, as doing reduce in parallel won't\n // work in many situations.\n async.reduce = function (arr, memo, iterator, callback) {\n async.eachSeries(arr, function (x, callback) {\n iterator(memo, x, function (err, v) {\n memo = v;\n callback(err);\n });\n }, function (err) {\n callback(err, memo);\n });\n };\n // inject alias\n async.inject = async.reduce;\n // foldl alias\n async.foldl = async.reduce;\n\n async.reduceRight = function (arr, memo, iterator, callback) {\n var reversed = _map(arr, function (x) {\n return x;\n }).reverse();\n async.reduce(reversed, memo, iterator, callback);\n };\n // foldr alias\n async.foldr = async.reduceRight;\n\n var _filter = function (eachfn, arr, iterator, callback) {\n var results = [];\n arr = _map(arr, function (x, i) {\n return {index: i, value: x};\n });\n eachfn(arr, function (x, callback) {\n iterator(x.value, function (v) {\n if (v) {\n results.push(x);\n }\n callback();\n });\n }, function (err) {\n callback(_map(results.sort(function (a, b) {\n return a.index - b.index;\n }), function (x) {\n return x.value;\n }));\n });\n };\n async.filter = doParallel(_filter);\n async.filterSeries = doSeries(_filter);\n // select alias\n async.select = async.filter;\n async.selectSeries = async.filterSeries;\n\n var _reject = function (eachfn, arr, iterator, callback) {\n var results = [];\n arr = _map(arr, function (x, i) {\n return {index: i, value: x};\n });\n eachfn(arr, function (x, callback) {\n iterator(x.value, function (v) {\n if (!v) {\n results.push(x);\n }\n callback();\n });\n }, function (err) {\n callback(_map(results.sort(function (a, b) {\n return a.index - b.index;\n }), function (x) {\n return x.value;\n }));\n });\n };\n async.reject = doParallel(_reject);\n async.rejectSeries = doSeries(_reject);\n\n var _detect = function (eachfn, arr, iterator, main_callback) {\n eachfn(arr, function (x, callback) {\n iterator(x, function (result) {\n if (result) {\n main_callback(x);\n main_callback = function () {};\n }\n else {\n callback();\n }\n });\n }, function (err) {\n main_callback();\n });\n };\n async.detect = doParallel(_detect);\n async.detectSeries = doSeries(_detect);\n\n async.some = function (arr, iterator, main_callback) {\n async.each(arr, function (x, callback) {\n iterator(x, function (v) {\n if (v) {\n main_callback(true);\n main_callback = function () {};\n }\n callback();\n });\n }, function (err) {\n main_callback(false);\n });\n };\n // any alias\n async.any = async.some;\n\n async.every = function (arr, iterator, main_callback) {\n async.each(arr, function (x, callback) {\n iterator(x, function (v) {\n if (!v) {\n main_callback(false);\n main_callback = function () {};\n }\n callback();\n });\n }, function (err) {\n main_callback(true);\n });\n };\n // all alias\n async.all = async.every;\n\n async.sortBy = function (arr, iterator, callback) {\n async.map(arr, function (x, callback) {\n iterator(x, function (err, criteria) {\n if (err) {\n callback(err);\n }\n else {\n callback(null, {value: x, criteria: criteria});\n }\n });\n }, function (err, results) {\n if (err) {\n return callback(err);\n }\n else {\n var fn = function (left, right) {\n var a = left.criteria, b = right.criteria;\n return a < b ? -1 : a > b ? 1 : 0;\n };\n callback(null, _map(results.sort(fn), function (x) {\n return x.value;\n }));\n }\n });\n };\n\n async.auto = function (tasks, callback) {\n callback = callback || function () {};\n var keys = _keys(tasks);\n if (!keys.length) {\n return callback(null);\n }\n\n var results = {};\n\n var listeners = [];\n var addListener = function (fn) {\n listeners.unshift(fn);\n };\n var removeListener = function (fn) {\n for (var i = 0; i < listeners.length; i += 1) {\n if (listeners[i] === fn) {\n listeners.splice(i, 1);\n return;\n }\n }\n };\n var taskComplete = function () {\n _each(listeners.slice(0), function (fn) {\n fn();\n });\n };\n\n addListener(function () {\n if (_keys(results).length === keys.length) {\n callback(null, results);\n callback = function () {};\n }\n });\n\n _each(keys, function (k) {\n var task = (tasks[k] instanceof Function) ? [tasks[k]]: tasks[k];\n var taskCallback = function (err) {\n var args = Array.prototype.slice.call(arguments, 1);\n if (args.length <= 1) {\n args = args[0];\n }\n if (err) {\n var safeResults = {};\n _each(_keys(results), function(rkey) {\n safeResults[rkey] = results[rkey];\n });\n safeResults[k] = args;\n callback(err, safeResults);\n // stop subsequent errors hitting callback multiple times\n callback = function () {};\n }\n else {\n results[k] = args;\n async.setImmediate(taskComplete);\n }\n };\n var requires = task.slice(0, Math.abs(task.length - 1)) || [];\n var ready = function () {\n return _reduce(requires, function (a, x) {\n return (a && results.hasOwnProperty(x));\n }, true) && !results.hasOwnProperty(k);\n };\n if (ready()) {\n task[task.length - 1](taskCallback, results);\n }\n else {\n var listener = function () {\n if (ready()) {\n removeListener(listener);\n task[task.length - 1](taskCallback, results);\n }\n };\n addListener(listener);\n }\n });\n };\n\n async.waterfall = function (tasks, callback) {\n callback = callback || function () {};\n if (tasks.constructor !== Array) {\n var err = new Error('First argument to waterfall must be an array of functions');\n return callback(err);\n }\n if (!tasks.length) {\n return callback();\n }\n var wrapIterator = function (iterator) {\n return function (err) {\n if (err) {\n callback.apply(null, arguments);\n callback = function () {};\n }\n else {\n var args = Array.prototype.slice.call(arguments, 1);\n var next = iterator.next();\n if (next) {\n args.push(wrapIterator(next));\n }\n else {\n args.push(callback);\n }\n async.setImmediate(function () {\n iterator.apply(null, args);\n });\n }\n };\n };\n wrapIterator(async.iterator(tasks))();\n };\n\n var _parallel = function(eachfn, tasks, callback) {\n callback = callback || function () {};\n if (tasks.constructor === Array) {\n eachfn.map(tasks, function (fn, callback) {\n if (fn) {\n fn(function (err) {\n var args = Array.prototype.slice.call(arguments, 1);\n if (args.length <= 1) {\n args = args[0];\n }\n callback.call(null, err, args);\n });\n }\n }, callback);\n }\n else {\n var results = {};\n eachfn.each(_keys(tasks), function (k, callback) {\n tasks[k](function (err) {\n var args = Array.prototype.slice.call(arguments, 1);\n if (args.length <= 1) {\n args = args[0];\n }\n results[k] = args;\n callback(err);\n });\n }, function (err) {\n callback(err, results);\n });\n }\n };\n\n async.parallel = function (tasks, callback) {\n _parallel({ map: async.map, each: async.each }, tasks, callback);\n };\n\n async.parallelLimit = function(tasks, limit, callback) {\n _parallel({ map: _mapLimit(limit), each: _eachLimit(limit) }, tasks, callback);\n };\n\n async.series = function (tasks, callback) {\n callback = callback || function () {};\n if (tasks.constructor === Array) {\n async.mapSeries(tasks, function (fn, callback) {\n if (fn) {\n fn(function (err) {\n var args = Array.prototype.slice.call(arguments, 1);\n if (args.length <= 1) {\n args = args[0];\n }\n callback.call(null, err, args);\n });\n }\n }, callback);\n }\n else {\n var results = {};\n async.eachSeries(_keys(tasks), function (k, callback) {\n tasks[k](function (err) {\n var args = Array.prototype.slice.call(arguments, 1);\n if (args.length <= 1) {\n args = args[0];\n }\n results[k] = args;\n callback(err);\n });\n }, function (err) {\n callback(err, results);\n });\n }\n };\n\n async.iterator = function (tasks) {\n var makeCallback = function (index) {\n var fn = function () {\n if (tasks.length) {\n tasks[index].apply(null, arguments);\n }\n return fn.next();\n };\n fn.next = function () {\n return (index < tasks.length - 1) ? makeCallback(index + 1): null;\n };\n return fn;\n };\n return makeCallback(0);\n };\n\n async.apply = function (fn) {\n var args = Array.prototype.slice.call(arguments, 1);\n return function () {\n return fn.apply(\n null, args.concat(Array.prototype.slice.call(arguments))\n );\n };\n };\n\n var _concat = function (eachfn, arr, fn, callback) {\n var r = [];\n eachfn(arr, function (x, cb) {\n fn(x, function (err, y) {\n r = r.concat(y || []);\n cb(err);\n });\n }, function (err) {\n callback(err, r);\n });\n };\n async.concat = doParallel(_concat);\n async.concatSeries = doSeries(_concat);\n\n async.whilst = function (test, iterator, callback) {\n if (test()) {\n iterator(function (err) {\n if (err) {\n return callback(err);\n }\n async.whilst(test, iterator, callback);\n });\n }\n else {\n callback();\n }\n };\n\n async.doWhilst = function (iterator, test, callback) {\n iterator(function (err) {\n if (err) {\n return callback(err);\n }\n if (test()) {\n async.doWhilst(iterator, test, callback);\n }\n else {\n callback();\n }\n });\n };\n\n async.until = function (test, iterator, callback) {\n if (!test()) {\n iterator(function (err) {\n if (err) {\n return callback(err);\n }\n async.until(test, iterator, callback);\n });\n }\n else {\n callback();\n }\n };\n\n async.doUntil = function (iterator, test, callback) {\n iterator(function (err) {\n if (err) {\n return callback(err);\n }\n if (!test()) {\n async.doUntil(iterator, test, callback);\n }\n else {\n callback();\n }\n });\n };\n\n async.queue = function (worker, concurrency) {\n if (concurrency === undefined) {\n concurrency = 1;\n }\n function _insert(q, data, pos, callback) {\n if(data.constructor !== Array) {\n data = [data];\n }\n _each(data, function(task) {\n var item = {\n data: task,\n callback: typeof callback === 'function' ? callback : null\n };\n\n if (pos) {\n q.tasks.unshift(item);\n } else {\n q.tasks.push(item);\n }\n\n if (q.saturated && q.tasks.length === concurrency) {\n q.saturated();\n }\n async.setImmediate(q.process);\n });\n }\n\n var workers = 0;\n var q = {\n tasks: [],\n concurrency: concurrency,\n saturated: null,\n empty: null,\n drain: null,\n push: function (data, callback) {\n _insert(q, data, false, callback);\n },\n unshift: function (data, callback) {\n _insert(q, data, true, callback);\n },\n process: function () {\n if (workers < q.concurrency && q.tasks.length) {\n var task = q.tasks.shift();\n if (q.empty && q.tasks.length === 0) {\n q.empty();\n }\n workers += 1;\n var next = function () {\n workers -= 1;\n if (task.callback) {\n task.callback.apply(task, arguments);\n }\n if (q.drain && q.tasks.length + workers === 0) {\n q.drain();\n }\n q.process();\n };\n var cb = only_once(next);\n worker(task.data, cb);\n }\n },\n length: function () {\n return q.tasks.length;\n },\n running: function () {\n return workers;\n }\n };\n return q;\n };\n\n async.cargo = function (worker, payload) {\n var working = false,\n tasks = [];\n\n var cargo = {\n tasks: tasks,\n payload: payload,\n saturated: null,\n empty: null,\n drain: null,\n push: function (data, callback) {\n if(data.constructor !== Array) {\n data = [data];\n }\n _each(data, function(task) {\n tasks.push({\n data: task,\n callback: typeof callback === 'function' ? callback : null\n });\n if (cargo.saturated && tasks.length === payload) {\n cargo.saturated();\n }\n });\n async.setImmediate(cargo.process);\n },\n process: function process() {\n if (working) return;\n if (tasks.length === 0) {\n if(cargo.drain) cargo.drain();\n return;\n }\n\n var ts = typeof payload === 'number'\n ? tasks.splice(0, payload)\n : tasks.splice(0);\n\n var ds = _map(ts, function (task) {\n return task.data;\n });\n\n if(cargo.empty) cargo.empty();\n working = true;\n worker(ds, function () {\n working = false;\n\n var args = arguments;\n _each(ts, function (data) {\n if (data.callback) {\n data.callback.apply(null, args);\n }\n });\n\n process();\n });\n },\n length: function () {\n return tasks.length;\n },\n running: function () {\n return working;\n }\n };\n return cargo;\n };\n\n var _console_fn = function (name) {\n return function (fn) {\n var args = Array.prototype.slice.call(arguments, 1);\n fn.apply(null, args.concat([function (err) {\n var args = Array.prototype.slice.call(arguments, 1);\n if (typeof console !== 'undefined') {\n if (err) {\n if (console.error) {\n console.error(err);\n }\n }\n else if (console[name]) {\n _each(args, function (x) {\n console[name](x);\n });\n }\n }\n }]));\n };\n };\n async.log = _console_fn('log');\n async.dir = _console_fn('dir');\n /*async.info = _console_fn('info');\n async.warn = _console_fn('warn');\n async.error = _console_fn('error');*/\n\n async.memoize = function (fn, hasher) {\n var memo = {};\n var queues = {};\n hasher = hasher || function (x) {\n return x;\n };\n var memoized = function () {\n var args = Array.prototype.slice.call(arguments);\n var callback = args.pop();\n var key = hasher.apply(null, args);\n if (key in memo) {\n callback.apply(null, memo[key]);\n }\n else if (key in queues) {\n queues[key].push(callback);\n }\n else {\n queues[key] = [callback];\n fn.apply(null, args.concat([function () {\n memo[key] = arguments;\n var q = queues[key];\n delete queues[key];\n for (var i = 0, l = q.length; i < l; i++) {\n q[i].apply(null, arguments);\n }\n }]));\n }\n };\n memoized.memo = memo;\n memoized.unmemoized = fn;\n return memoized;\n };\n\n async.unmemoize = function (fn) {\n return function () {\n return (fn.unmemoized || fn).apply(null, arguments);\n };\n };\n\n async.times = function (count, iterator, callback) {\n var counter = [];\n for (var i = 0; i < count; i++) {\n counter.push(i);\n }\n return async.map(counter, iterator, callback);\n };\n\n async.timesSeries = function (count, iterator, callback) {\n var counter = [];\n for (var i = 0; i < count; i++) {\n counter.push(i);\n }\n return async.mapSeries(counter, iterator, callback);\n };\n\n async.compose = function (/* functions... */) {\n var fns = Array.prototype.reverse.call(arguments);\n return function () {\n var that = this;\n var args = Array.prototype.slice.call(arguments);\n var callback = args.pop();\n async.reduce(fns, args, function (newargs, fn, cb) {\n fn.apply(that, newargs.concat([function () {\n var err = arguments[0];\n var nextargs = Array.prototype.slice.call(arguments, 1);\n cb(err, nextargs);\n }]))\n },\n function (err, results) {\n callback.apply(that, [err].concat(results));\n });\n };\n };\n\n var _applyEach = function (eachfn, fns /*args...*/) {\n var go = function () {\n var that = this;\n var args = Array.prototype.slice.call(arguments);\n var callback = args.pop();\n return eachfn(fns, function (fn, cb) {\n fn.apply(that, args.concat([cb]));\n },\n callback);\n };\n if (arguments.length > 2) {\n var args = Array.prototype.slice.call(arguments, 2);\n return go.apply(this, args);\n }\n else {\n return go;\n }\n };\n async.applyEach = doParallel(_applyEach);\n async.applyEachSeries = doSeries(_applyEach);\n\n async.forever = function (fn, callback) {\n function next(err) {\n if (err) {\n if (callback) {\n return callback(err);\n }\n throw err;\n }\n fn(next);\n }\n next();\n };\n\n // AMD / RequireJS\n if (typeof define !== 'undefined' && define.amd) {\n define('async',[], function () {\n return async;\n });\n }\n // Node.js\n else if (typeof module !== 'undefined' && module.exports) {\n module.exports = async;\n }\n // included directly via