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+ + // global on the server, window in the browser + var root, previous_async; + + root = this; + if (root != null) { + previous_async = root.async; + } + + async.noConflict = function () { + root.async = previous_async; + return async; + }; + + function only_once(fn) { + var called = false; + return function() { + if (called) throw new Error("Callback was already called."); + called = true; + fn.apply(root, arguments); + } + } + + //// cross-browser compatiblity functions //// + + var _isArray = Array.isArray || function (obj) { + return toString.call(obj) === '[object Array]'; + }; + + var _isFunction = function (obj) { + return obj instanceof Function || + toString.call(obj) === '[object Function]'; + }; + + var _each = function (arr, iterator) { + if (arr.forEach) { + return arr.forEach(iterator); + } + for (var i = 0; i < arr.length; i += 1) { + iterator(arr[i], i, arr); + } + }; + + var _map = function (arr, iterator) { + if (arr.map) { + return arr.map(iterator); + } + var results = []; + _each(arr, function (x, i, a) { + results.push(iterator(x, i, a)); + }); + return results; + }; + + var _reduce = function (arr, iterator, memo) { + if (arr.reduce) { + return arr.reduce(iterator, memo); + } + _each(arr, function (x, i, a) { + memo = iterator(memo, x, i, a); + }); + return memo; + }; + + var _keys = function (obj) { + if (Object.keys) { + return Object.keys(obj); + } + var keys = []; + for (var k in obj) { + if (obj.hasOwnProperty(k)) { + keys.push(k); + } + } + return keys; + }; + + //// exported async module functions //// + + //// nextTick implementation with browser-compatible fallback //// + if (typeof process === 'undefined' || !(process.nextTick)) { + if (typeof setImmediate === 'function') { + async.nextTick = function (fn) { + // not a direct alias for IE10 compatibility + setImmediate(fn); + }; + async.setImmediate = async.nextTick; + } + else { + async.nextTick = function (fn) { + setTimeout(fn, 0); + }; + async.setImmediate = async.nextTick; + } + } + else { + async.nextTick = process.nextTick; + if (typeof setImmediate !== 'undefined') { + async.setImmediate = function (fn) { + // not a direct alias for IE10 compatibility + setImmediate(fn); + }; + } + else { + async.setImmediate = async.nextTick; + } + } + + async.each = function (arr, iterator, callback) { + callback = callback || function () {}; + if (!arr.length) { + return callback(); + } + var completed = 0; + _each(arr, function (x) { + iterator(x, only_once(done) ); + }); + function done(err) { + if (err) { + callback(err); + callback = function () {}; + } + else { + completed += 1; + if (completed >= arr.length) { + callback(); + } + } + } + }; + async.forEach = async.each; + + async.eachSeries = function (arr, iterator, callback) { + callback = callback || function () {}; + if (!arr.length) { + return callback(); + } + var completed = 0; + var iterate = function () { + iterator(arr[completed], function (err) { + if (err) { + callback(err); + callback = function () {}; + } + else { + completed += 1; + if (completed >= arr.length) { + callback(); + } + else { + iterate(); + } + } + }); + }; + iterate(); + }; + async.forEachSeries = async.eachSeries; + + async.eachLimit = function (arr, limit, iterator, callback) { + var fn = _eachLimit(limit); + fn.apply(null, [arr, iterator, callback]); + }; + async.forEachLimit = async.eachLimit; + + var _eachLimit = function (limit) { + + return function (arr, iterator, callback) { + callback = callback || function () {}; + if (!arr.length || limit <= 0) { + return callback(); + } + var completed = 0; + var started = 0; + var running = 0; + + (function replenish () { + if (completed >= arr.length) { + return callback(); + } + + while (running < limit && started < arr.length) { + started += 1; + running += 1; + iterator(arr[started - 1], function (err) { + if (err) { + callback(err); + callback = function () {}; + } + else { + completed += 1; + running -= 1; + if (completed >= arr.length) { + callback(); + } + else { + replenish(); + } + } + }); + } + })(); + }; + }; + + + var doParallel = function (fn) { + return function () { + var args = Array.prototype.slice.call(arguments); + return fn.apply(null, [async.each].concat(args)); + }; + }; + var doParallelLimit = function(limit, fn) { + return function () { + var args = Array.prototype.slice.call(arguments); + return fn.apply(null, [_eachLimit(limit)].concat(args)); + }; + }; + var doSeries = function (fn) { + return function () { + var args = Array.prototype.slice.call(arguments); + return fn.apply(null, [async.eachSeries].concat(args)); + }; + }; + + + var _asyncMap = function (eachfn, arr, iterator, callback) { + var results = []; + arr = _map(arr, function (x, i) { + return {index: i, value: x}; + }); + eachfn(arr, function (x, callback) { + iterator(x.value, function (err, v) { + results[x.index] = v; + callback(err); + }); + }, function (err) { + callback(err, results); + }); + }; + async.map = doParallel(_asyncMap); + async.mapSeries = doSeries(_asyncMap); + async.mapLimit = function (arr, limit, iterator, callback) { + return _mapLimit(limit)(arr, iterator, callback); + }; + + var _mapLimit = function(limit) { + return doParallelLimit(limit, _asyncMap); + }; + + // reduce only has a series version, as doing reduce in parallel won't + // work in many situations. + async.reduce = function (arr, memo, iterator, callback) { + async.eachSeries(arr, function (x, callback) { + iterator(memo, x, function (err, v) { + memo = v; + callback(err); + }); + }, function (err) { + callback(err, memo); + }); + }; + // inject alias + async.inject = async.reduce; + // foldl alias + async.foldl = async.reduce; + + async.reduceRight = function (arr, memo, iterator, callback) { + var reversed = _map(arr, function (x) { + return x; + }).reverse(); + async.reduce(reversed, memo, iterator, callback); + }; + // foldr alias + async.foldr = async.reduceRight; + + var _filter = function (eachfn, arr, iterator, callback) { + var results = []; + arr = _map(arr, function (x, i) { + return {index: i, value: x}; + }); + eachfn(arr, function (x, callback) { + iterator(x.value, function (v) { + if (v) { + results.push(x); + } + callback(); + }); + }, function (err) { + callback(_map(results.sort(function (a, b) { + return a.index - b.index; + }), function (x) { + return x.value; + })); + }); + }; + async.filter = doParallel(_filter); + async.filterSeries = doSeries(_filter); + // select alias + async.select = async.filter; + async.selectSeries = async.filterSeries; + + var _reject = function (eachfn, arr, iterator, callback) { + var results = []; + arr = _map(arr, function (x, i) { + return {index: i, value: x}; + }); + eachfn(arr, function (x, callback) { + iterator(x.value, function (v) { + if (!v) { + results.push(x); + } + callback(); + }); + }, function (err) { + callback(_map(results.sort(function (a, b) { + return a.index - b.index; + }), function (x) { + return x.value; + })); + }); + }; + async.reject = doParallel(_reject); + async.rejectSeries = doSeries(_reject); + + var _detect = function (eachfn, arr, iterator, main_callback) { + eachfn(arr, function (x, callback) { + iterator(x, function (result) { + if (result) { + main_callback(x); + main_callback = function () {}; + } + else { + callback(); + } + }); + }, function (err) { + main_callback(); + }); + }; + async.detect = doParallel(_detect); + async.detectSeries = doSeries(_detect); + + async.some = function (arr, iterator, main_callback) { + async.each(arr, function (x, callback) { + iterator(x, function (v) { + if (v) { + main_callback(true); + main_callback = function () {}; + } + callback(); + }); + }, function (err) { + main_callback(false); + }); + }; + // any alias + async.any = async.some; + + async.every = function (arr, iterator, main_callback) { + async.each(arr, function (x, callback) { + iterator(x, function (v) { + if (!v) { + main_callback(false); + main_callback = function () {}; + } + callback(); + }); + }, function (err) { + main_callback(true); + }); + }; + // all alias + async.all = async.every; + + async.sortBy = function (arr, iterator, callback) { + async.map(arr, function (x, callback) { + iterator(x, function (err, criteria) { + if (err) { + callback(err); + } + else { + callback(null, {value: x, criteria: criteria}); + } + }); + }, function (err, results) { + if (err) { + return callback(err); + } + else { + var fn = function (left, right) { + var a = left.criteria, b = right.criteria; + return a < b ? -1 : a > b ? 1 : 0; + }; + callback(null, _map(results.sort(fn), function (x) { + return x.value; + })); + } + }); + }; + + async.auto = function (tasks, callback) { + callback = callback || function () {}; + var keys = _keys(tasks); + var remainingTasks = keys.length + if (!remainingTasks) { + return callback(); + } + + var results = {}; + + var listeners = []; + var addListener = function (fn) { + listeners.unshift(fn); + }; + var removeListener = function (fn) { + for (var i = 0; i < listeners.length; i += 1) { + if (listeners[i] === fn) { + listeners.splice(i, 1); + return; + } + } + }; + var taskComplete = function () { + remainingTasks-- + _each(listeners.slice(0), function (fn) { + fn(); + }); + }; + + addListener(function () { + if (!remainingTasks) { + var theCallback = callback; + // prevent final callback from calling itself if it errors + callback = function () {}; + + theCallback(null, results); + } + }); + + _each(keys, function (k) { + var task = _isFunction(tasks[k]) ? [tasks[k]]: tasks[k]; + var taskCallback = function (err) { + var args = Array.prototype.slice.call(arguments, 1); + if (args.length <= 1) { + args = args[0]; + } + if (err) { + var safeResults = {}; + _each(_keys(results), function(rkey) { + safeResults[rkey] = results[rkey]; + }); + safeResults[k] = args; + callback(err, safeResults); + // stop subsequent errors hitting callback multiple times + callback = function () {}; + } + else { + results[k] = args; + async.setImmediate(taskComplete); + } + }; + var requires = task.slice(0, Math.abs(task.length - 1)) || []; + var ready = function () { + return _reduce(requires, function (a, x) { + return (a && results.hasOwnProperty(x)); + }, true) && !results.hasOwnProperty(k); + }; + if (ready()) { + task[task.length - 1](taskCallback, results); + } + else { + var listener = function () { + if (ready()) { + removeListener(listener); + task[task.length - 1](taskCallback, results); + } + }; + addListener(listener); + } + }); + }; + + async.retry = function(times, task, callback) { + var DEFAULT_TIMES = 5; + var attempts = []; + // Use defaults if times not passed + if (typeof times === 'function') { + callback = task; + task = times; + times = DEFAULT_TIMES; + } + // Make sure times is a number + times = parseInt(times, 10) || DEFAULT_TIMES; + var wrappedTask = function(wrappedCallback, wrappedResults) { + var retryAttempt = function(task, finalAttempt) { + return function(seriesCallback) { + task(function(err, result){ + seriesCallback(!err || finalAttempt, {err: err, result: result}); + }, wrappedResults); + }; + }; + while (times) { + attempts.push(retryAttempt(task, !(times-=1))); + } + async.series(attempts, function(done, data){ + data = data[data.length - 1]; + (wrappedCallback || callback)(data.err, data.result); + }); + } + // If a callback is passed, run this as a controll flow + return callback ? wrappedTask() : wrappedTask + }; + + async.waterfall = function (tasks, callback) { + callback = callback || function () {}; + if (!_isArray(tasks)) { + var err = new Error('First argument to waterfall must be an array of functions'); + return callback(err); + } + if (!tasks.length) { + return callback(); + } + var wrapIterator = function (iterator) { + return function (err) { + if (err) { + callback.apply(null, arguments); + callback = function () {}; + } + else { + var args = Array.prototype.slice.call(arguments, 1); + var next = iterator.next(); + if (next) { + args.push(wrapIterator(next)); + } + else { + args.push(callback); + } + async.setImmediate(function () { + iterator.apply(null, args); + }); + } + }; + }; + wrapIterator(async.iterator(tasks))(); + }; + + var _parallel = function(eachfn, tasks, callback) { + callback = callback || function () {}; + if (_isArray(tasks)) { + eachfn.map(tasks, function (fn, callback) { + if (fn) { + fn(function (err) { + var args = Array.prototype.slice.call(arguments, 1); + if (args.length <= 1) { + args = args[0]; + } + callback.call(null, err, args); + }); + } + }, callback); + } + else { + var results = {}; + eachfn.each(_keys(tasks), function (k, callback) { + tasks[k](function (err) { + var args = Array.prototype.slice.call(arguments, 1); + if (args.length <= 1) { + args = args[0]; + } + results[k] = args; + callback(err); + }); + }, function (err) { + callback(err, results); + }); + } + }; + + async.parallel = function (tasks, callback) { + _parallel({ map: async.map, each: async.each }, tasks, callback); + }; + + async.parallelLimit = function(tasks, limit, callback) { + _parallel({ map: _mapLimit(limit), each: _eachLimit(limit) }, tasks, callback); + }; + + async.series = function (tasks, callback) { + callback = callback || function () {}; + if (_isArray(tasks)) { + async.mapSeries(tasks, function (fn, callback) { + if (fn) { + fn(function (err) { + var args = Array.prototype.slice.call(arguments, 1); + if (args.length <= 1) { + args = args[0]; + } + callback.call(null, err, args); + }); + } + }, callback); + } + else { + var results = {}; + async.eachSeries(_keys(tasks), function (k, callback) { + tasks[k](function (err) { + var args = Array.prototype.slice.call(arguments, 1); + if (args.length <= 1) { + args = args[0]; + } + results[k] = args; + callback(err); + }); + }, function (err) { + callback(err, results); + }); + } + }; + + async.iterator = function (tasks) { + var makeCallback = function (index) { + var fn = function () { + if (tasks.length) { + tasks[index].apply(null, arguments); + } + return fn.next(); + }; + fn.next = function () { + return (index < tasks.length - 1) ? makeCallback(index + 1): null; + }; + return fn; + }; + return makeCallback(0); + }; + + async.apply = function (fn) { + var args = Array.prototype.slice.call(arguments, 1); + return function () { + return fn.apply( + null, args.concat(Array.prototype.slice.call(arguments)) + ); + }; + }; + + var _concat = function (eachfn, arr, fn, callback) { + var r = []; + eachfn(arr, function (x, cb) { + fn(x, function (err, y) { + r = r.concat(y || []); + cb(err); + }); + }, function (err) { + callback(err, r); + }); + }; + async.concat = doParallel(_concat); + async.concatSeries = doSeries(_concat); + + async.whilst = function (test, iterator, callback) { + if (test()) { + iterator(function (err) { + if (err) { + return callback(err); + } + async.whilst(test, iterator, callback); + }); + } + else { + callback(); + } + }; + + async.doWhilst = function (iterator, test, callback) { + iterator(function (err) { + if (err) { + return callback(err); + } + var args = Array.prototype.slice.call(arguments, 1); + if (test.apply(null, args)) { + async.doWhilst(iterator, test, callback); + } + else { + callback(); + } + }); + }; + + async.until = function (test, iterator, callback) { + if (!test()) { + iterator(function (err) { + if (err) { + return callback(err); + } + async.until(test, iterator, callback); + }); + } + else { + callback(); + } + }; + + async.doUntil = function (iterator, test, callback) { + iterator(function (err) { + if (err) { + return callback(err); + } + var args = Array.prototype.slice.call(arguments, 1); + if (!test.apply(null, args)) { + async.doUntil(iterator, test, callback); + } + else { + callback(); + } + }); + }; + + async.queue = function (worker, concurrency) { + if (concurrency === undefined) { + concurrency = 1; + } + function _insert(q, data, pos, callback) { + if (!_isArray(data)) { + data = [data]; + } + if(data.length == 0) { + // call drain immediately if there are no tasks + return async.setImmediate(function() { + if (q.drain) { + q.drain(); + } + }); + } + _each(data, function(task) { + var item = { + data: task, + callback: typeof callback === 'function' ? callback : null + }; + + if (pos) { + q.tasks.unshift(item); + } else { + q.tasks.push(item); + } + + if (q.saturated && q.tasks.length === q.concurrency) { + q.saturated(); + } + async.setImmediate(q.process); + }); + } + + var workers = 0; + var q = { + tasks: [], + concurrency: concurrency, + saturated: null, + empty: null, + drain: null, + paused: false, + push: function (data, callback) { + _insert(q, data, false, callback); + }, + unshift: function (data, callback) { + _insert(q, data, true, callback); + }, + process: function () { + if (!q.paused && workers < q.concurrency && q.tasks.length) { + var task = q.tasks.shift(); + if (q.empty && q.tasks.length === 0) { + q.empty(); + } + workers += 1; + var next = function () { + workers -= 1; + if (task.callback) { + task.callback.apply(task, arguments); + } + if (q.drain && q.tasks.length + workers === 0) { + q.drain(); + } + q.process(); + }; + var cb = only_once(next); + worker(task.data, cb); + } + }, + length: function () { + return q.tasks.length; + }, + running: function () { + return workers; + }, + idle: function() { + return q.tasks.length + workers === 0; + }, + pause: function () { + if (q.paused === true) { return; } + q.paused = true; + q.process(); + }, + resume: function () { + if (q.paused === false) { return; } + q.paused = false; + q.process(); + } + }; + return q; + }; + + async.cargo = function (worker, payload) { + var working = false, + tasks = []; + + var cargo = { + tasks: tasks, + payload: payload, + saturated: null, + empty: null, + drain: null, + drained: true, + push: function (data, callback) { + if (!_isArray(data)) { + data = [data]; + } + _each(data, function(task) { + tasks.push({ + data: task, + callback: typeof callback === 'function' ? callback : null + }); + cargo.drained = false; + if (cargo.saturated && tasks.length === payload) { + cargo.saturated(); + } + }); + async.setImmediate(cargo.process); + }, + process: function process() { + if (working) return; + if (tasks.length === 0) { + if(cargo.drain && !cargo.drained) cargo.drain(); + cargo.drained = true; + return; + } + + var ts = typeof payload === 'number' + ? tasks.splice(0, payload) + : tasks.splice(0, tasks.length); + + var ds = _map(ts, function (task) { + return task.data; + }); + + if(cargo.empty) cargo.empty(); + working = true; + worker(ds, function () { + working = false; + + var args = arguments; + _each(ts, function (data) { + if (data.callback) { + data.callback.apply(null, args); + } + }); + + process(); + }); + }, + length: function () { + return tasks.length; + }, + running: function () { + return working; + } + }; + return cargo; + }; + + var _console_fn = function (name) { + return function (fn) { + var args = Array.prototype.slice.call(arguments, 1); + fn.apply(null, args.concat([function (err) { + var args = Array.prototype.slice.call(arguments, 1); + if (typeof console !== 'undefined') { + if (err) { + if (console.error) { + console.error(err); + } + } + else if (console[name]) { + _each(args, function (x) { + console[name](x); + }); + } + } + }])); + }; + }; + async.log = _console_fn('log'); + async.dir = _console_fn('dir'); + /*async.info = _console_fn('info'); + async.warn = _console_fn('warn'); + async.error = _console_fn('error');*/ + + async.memoize = function (fn, hasher) { + var memo = {}; + var queues = {}; + hasher = hasher || function (x) { + return x; + }; + var memoized = function () { + var args = Array.prototype.slice.call(arguments); + var callback = args.pop(); + var key = hasher.apply(null, args); + if (key in memo) { + async.nextTick(function () { + callback.apply(null, memo[key]); + }); + } + else if (key in queues) { + queues[key].push(callback); + } + else { + queues[key] = [callback]; + fn.apply(null, args.concat([function () { + memo[key] = arguments; + var q = queues[key]; + delete queues[key]; + for (var i = 0, l = q.length; i < l; i++) { + q[i].apply(null, arguments); + } + }])); + } + }; + memoized.memo = memo; + memoized.unmemoized = fn; + return memoized; + }; + + async.unmemoize = function (fn) { + return function () { + return (fn.unmemoized || fn).apply(null, arguments); + }; + }; + + async.times = function (count, iterator, callback) { + var counter = []; + for (var i = 0; i < count; i++) { + counter.push(i); + } + return async.map(counter, iterator, callback); + }; + + async.timesSeries = function (count, iterator, callback) { + var counter = []; + for (var i = 0; i < count; i++) { + counter.push(i); + } + return async.mapSeries(counter, iterator, callback); + }; + + async.seq = function (/* functions... */) { + var fns = arguments; + return function () { + var that = this; + var args = Array.prototype.slice.call(arguments); + var callback = args.pop(); + async.reduce(fns, args, function (newargs, fn, cb) { + fn.apply(that, newargs.concat([function () { + var err = arguments[0]; + var nextargs = Array.prototype.slice.call(arguments, 1); + cb(err, nextargs); + }])) + }, + function (err, results) { + callback.apply(that, [err].concat(results)); + }); + }; + }; + + async.compose = function (/* functions... */) { + return async.seq.apply(null, Array.prototype.reverse.call(arguments)); + }; + + var _applyEach = function (eachfn, fns /*args...*/) { + var go = function () { + var that = this; + var args = Array.prototype.slice.call(arguments); + var callback = args.pop(); + return eachfn(fns, function (fn, cb) { + fn.apply(that, args.concat([cb])); + }, + callback); + }; + if (arguments.length > 2) { + var args = Array.prototype.slice.call(arguments, 2); + return go.apply(this, args); + } + else { + return go; + } + }; + async.applyEach = doParallel(_applyEach); + async.applyEachSeries = doSeries(_applyEach); + + async.forever = function (fn, callback) { + function next(err) { + if (err) { + if (callback) { + return callback(err); + } + throw err; + } + fn(next); + } + next(); + }; + + // Node.js + if (typeof module !== 'undefined' && module.exports) { + module.exports = async; + } + // AMD / RequireJS + else if (typeof define !== 'undefined' && define.amd) { + define([], function () { + return async; + }); + } + // included directly via