--- /dev/null
+/*!
+ * async
+ * https://github.com/caolan/async
+ *
+ * Copyright 2010-2014 Caolan McMahon
+ * Released under the MIT license
+ */
+(function () {
+
+ var async = {};
+ function noop() {}
+ function identity(v) {
+ return v;
+ }
+ function toBool(v) {
+ return !!v;
+ }
+ function notId(v) {
+ return !v;
+ }
+
+ // global on the server, window in the browser
+ var previous_async;
+
+ // Establish the root object, `window` (`self`) in the browser, `global`
+ // on the server, or `this` in some virtual machines. We use `self`
+ // instead of `window` for `WebWorker` support.
+ var root = typeof self === 'object' && self.self === self && self ||
+ typeof global === 'object' && global.global === global && global ||
+ this;
+
+ if (root != null) {
+ previous_async = root.async;
+ }
+
+ async.noConflict = function () {
+ root.async = previous_async;
+ return async;
+ };
+
+ function only_once(fn) {
+ return function() {
+ if (fn === null) throw new Error("Callback was already called.");
+ fn.apply(this, arguments);
+ fn = null;
+ };
+ }
+
+ function _once(fn) {
+ return function() {
+ if (fn === null) return;
+ fn.apply(this, arguments);
+ fn = null;
+ };
+ }
+
+ //// cross-browser compatiblity functions ////
+
+ var _toString = Object.prototype.toString;
+
+ var _isArray = Array.isArray || function (obj) {
+ return _toString.call(obj) === '[object Array]';
+ };
+
+ // Ported from underscore.js isObject
+ var _isObject = function(obj) {
+ var type = typeof obj;
+ return type === 'function' || type === 'object' && !!obj;
+ };
+
+ function _isArrayLike(arr) {
+ return _isArray(arr) || (
+ // has a positive integer length property
+ typeof arr.length === "number" &&
+ arr.length >= 0 &&
+ arr.length % 1 === 0
+ );
+ }
+
+ function _arrayEach(arr, iterator) {
+ var index = -1,
+ length = arr.length;
+
+ while (++index < length) {
+ iterator(arr[index], index, arr);
+ }
+ }
+
+ function _map(arr, iterator) {
+ var index = -1,
+ length = arr.length,
+ result = Array(length);
+
+ while (++index < length) {
+ result[index] = iterator(arr[index], index, arr);
+ }
+ return result;
+ }
+
+ function _range(count) {
+ return _map(Array(count), function (v, i) { return i; });
+ }
+
+ function _reduce(arr, iterator, memo) {
+ _arrayEach(arr, function (x, i, a) {
+ memo = iterator(memo, x, i, a);
+ });
+ return memo;
+ }
+
+ function _forEachOf(object, iterator) {
+ _arrayEach(_keys(object), function (key) {
+ iterator(object[key], key);
+ });
+ }
+
+ function _indexOf(arr, item) {
+ for (var i = 0; i < arr.length; i++) {
+ if (arr[i] === item) return i;
+ }
+ return -1;
+ }
+
+ var _keys = Object.keys || function (obj) {
+ var keys = [];
+ for (var k in obj) {
+ if (obj.hasOwnProperty(k)) {
+ keys.push(k);
+ }
+ }
+ return keys;
+ };
+
+ function _keyIterator(coll) {
+ var i = -1;
+ var len;
+ var keys;
+ if (_isArrayLike(coll)) {
+ len = coll.length;
+ return function next() {
+ i++;
+ return i < len ? i : null;
+ };
+ } else {
+ keys = _keys(coll);
+ len = keys.length;
+ return function next() {
+ i++;
+ return i < len ? keys[i] : null;
+ };
+ }
+ }
+
+ // Similar to ES6's rest param (http://ariya.ofilabs.com/2013/03/es6-and-rest-parameter.html)
+ // This accumulates the arguments passed into an array, after a given index.
+ // From underscore.js (https://github.com/jashkenas/underscore/pull/2140).
+ function _restParam(func, startIndex) {
+ startIndex = startIndex == null ? func.length - 1 : +startIndex;
+ return function() {
+ var length = Math.max(arguments.length - startIndex, 0);
+ var rest = Array(length);
+ for (var index = 0; index < length; index++) {
+ rest[index] = arguments[index + startIndex];
+ }
+ switch (startIndex) {
+ case 0: return func.call(this, rest);
+ case 1: return func.call(this, arguments[0], rest);
+ }
+ // Currently unused but handle cases outside of the switch statement:
+ // var args = Array(startIndex + 1);
+ // for (index = 0; index < startIndex; index++) {
+ // args[index] = arguments[index];
+ // }
+ // args[startIndex] = rest;
+ // return func.apply(this, args);
+ };
+ }
+
+ function _withoutIndex(iterator) {
+ return function (value, index, callback) {
+ return iterator(value, callback);
+ };
+ }
+
+ //// exported async module functions ////
+
+ //// nextTick implementation with browser-compatible fallback ////
+
+ // capture the global reference to guard against fakeTimer mocks
+ var _setImmediate = typeof setImmediate === 'function' && setImmediate;
+
+ var _delay = _setImmediate ? function(fn) {
+ // not a direct alias for IE10 compatibility
+ _setImmediate(fn);
+ } : function(fn) {
+ setTimeout(fn, 0);
+ };
+
+ if (typeof process === 'object' && typeof process.nextTick === 'function') {
+ async.nextTick = process.nextTick;
+ } else {
+ async.nextTick = _delay;
+ }
+ async.setImmediate = _setImmediate ? _delay : async.nextTick;
+
+
+ async.forEach =
+ async.each = function (arr, iterator, callback) {
+ return async.eachOf(arr, _withoutIndex(iterator), callback);
+ };
+
+ async.forEachSeries =
+ async.eachSeries = function (arr, iterator, callback) {
+ return async.eachOfSeries(arr, _withoutIndex(iterator), callback);
+ };
+
+
+ async.forEachLimit =
+ async.eachLimit = function (arr, limit, iterator, callback) {
+ return _eachOfLimit(limit)(arr, _withoutIndex(iterator), callback);
+ };
+
+ async.forEachOf =
+ async.eachOf = function (object, iterator, callback) {
+ callback = _once(callback || noop);
+ object = object || [];
+
+ var iter = _keyIterator(object);
+ var key, completed = 0;
+
+ while ((key = iter()) != null) {
+ completed += 1;
+ iterator(object[key], key, only_once(done));
+ }
+
+ if (completed === 0) callback(null);
+
+ function done(err) {
+ completed--;
+ if (err) {
+ callback(err);
+ }
+ // Check key is null in case iterator isn't exhausted
+ // and done resolved synchronously.
+ else if (key === null && completed <= 0) {
+ callback(null);
+ }
+ }
+ };
+
+ async.forEachOfSeries =
+ async.eachOfSeries = function (obj, iterator, callback) {
+ callback = _once(callback || noop);
+ obj = obj || [];
+ var nextKey = _keyIterator(obj);
+ var key = nextKey();
+ function iterate() {
+ var sync = true;
+ if (key === null) {
+ return callback(null);
+ }
+ iterator(obj[key], key, only_once(function (err) {
+ if (err) {
+ callback(err);
+ }
+ else {
+ key = nextKey();
+ if (key === null) {
+ return callback(null);
+ } else {
+ if (sync) {
+ async.setImmediate(iterate);
+ } else {
+ iterate();
+ }
+ }
+ }
+ }));
+ sync = false;
+ }
+ iterate();
+ };
+
+
+
+ async.forEachOfLimit =
+ async.eachOfLimit = function (obj, limit, iterator, callback) {
+ _eachOfLimit(limit)(obj, iterator, callback);
+ };
+
+ function _eachOfLimit(limit) {
+
+ return function (obj, iterator, callback) {
+ callback = _once(callback || noop);
+ obj = obj || [];
+ var nextKey = _keyIterator(obj);
+ if (limit <= 0) {
+ return callback(null);
+ }
+ var done = false;
+ var running = 0;
+ var errored = false;
+
+ (function replenish () {
+ if (done && running <= 0) {
+ return callback(null);
+ }
+
+ while (running < limit && !errored) {
+ var key = nextKey();
+ if (key === null) {
+ done = true;
+ if (running <= 0) {
+ callback(null);
+ }
+ return;
+ }
+ running += 1;
+ iterator(obj[key], key, only_once(function (err) {
+ running -= 1;
+ if (err) {
+ callback(err);
+ errored = true;
+ }
+ else {
+ replenish();
+ }
+ }));
+ }
+ })();
+ };
+ }
+
+
+ function doParallel(fn) {
+ return function (obj, iterator, callback) {
+ return fn(async.eachOf, obj, iterator, callback);
+ };
+ }
+ function doParallelLimit(fn) {
+ return function (obj, limit, iterator, callback) {
+ return fn(_eachOfLimit(limit), obj, iterator, callback);
+ };
+ }
+ function doSeries(fn) {
+ return function (obj, iterator, callback) {
+ return fn(async.eachOfSeries, obj, iterator, callback);
+ };
+ }
+
+ function _asyncMap(eachfn, arr, iterator, callback) {
+ callback = _once(callback || noop);
+ arr = arr || [];
+ var results = _isArrayLike(arr) ? [] : {};
+ eachfn(arr, function (value, index, callback) {
+ iterator(value, function (err, v) {
+ results[index] = v;
+ callback(err);
+ });
+ }, function (err) {
+ callback(err, results);
+ });
+ }
+
+ async.map = doParallel(_asyncMap);
+ async.mapSeries = doSeries(_asyncMap);
+ async.mapLimit = doParallelLimit(_asyncMap);
+
+ // reduce only has a series version, as doing reduce in parallel won't
+ // work in many situations.
+ async.inject =
+ async.foldl =
+ async.reduce = function (arr, memo, iterator, callback) {
+ async.eachOfSeries(arr, function (x, i, callback) {
+ iterator(memo, x, function (err, v) {
+ memo = v;
+ callback(err);
+ });
+ }, function (err) {
+ callback(err, memo);
+ });
+ };
+
+ async.foldr =
+ async.reduceRight = function (arr, memo, iterator, callback) {
+ var reversed = _map(arr, identity).reverse();
+ async.reduce(reversed, memo, iterator, callback);
+ };
+
+ async.transform = function (arr, memo, iterator, callback) {
+ if (arguments.length === 3) {
+ callback = iterator;
+ iterator = memo;
+ memo = _isArray(arr) ? [] : {};
+ }
+
+ async.eachOf(arr, function(v, k, cb) {
+ iterator(memo, v, k, cb);
+ }, function(err) {
+ callback(err, memo);
+ });
+ };
+
+ function _filter(eachfn, arr, iterator, callback) {
+ var results = [];
+ eachfn(arr, function (x, index, callback) {
+ iterator(x, function (v) {
+ if (v) {
+ results.push({index: index, value: x});
+ }
+ callback();
+ });
+ }, function () {
+ callback(_map(results.sort(function (a, b) {
+ return a.index - b.index;
+ }), function (x) {
+ return x.value;
+ }));
+ });
+ }
+
+ async.select =
+ async.filter = doParallel(_filter);
+
+ async.selectLimit =
+ async.filterLimit = doParallelLimit(_filter);
+
+ async.selectSeries =
+ async.filterSeries = doSeries(_filter);
+
+ function _reject(eachfn, arr, iterator, callback) {
+ _filter(eachfn, arr, function(value, cb) {
+ iterator(value, function(v) {
+ cb(!v);
+ });
+ }, callback);
+ }
+ async.reject = doParallel(_reject);
+ async.rejectLimit = doParallelLimit(_reject);
+ async.rejectSeries = doSeries(_reject);
+
+ function _createTester(eachfn, check, getResult) {
+ return function(arr, limit, iterator, cb) {
+ function done() {
+ if (cb) cb(getResult(false, void 0));
+ }
+ function iteratee(x, _, callback) {
+ if (!cb) return callback();
+ iterator(x, function (v) {
+ if (cb && check(v)) {
+ cb(getResult(true, x));
+ cb = iterator = false;
+ }
+ callback();
+ });
+ }
+ if (arguments.length > 3) {
+ eachfn(arr, limit, iteratee, done);
+ } else {
+ cb = iterator;
+ iterator = limit;
+ eachfn(arr, iteratee, done);
+ }
+ };
+ }
+
+ async.any =
+ async.some = _createTester(async.eachOf, toBool, identity);
+
+ async.someLimit = _createTester(async.eachOfLimit, toBool, identity);
+
+ async.all =
+ async.every = _createTester(async.eachOf, notId, notId);
+
+ async.everyLimit = _createTester(async.eachOfLimit, notId, notId);
+
+ function _findGetResult(v, x) {
+ return x;
+ }
+ async.detect = _createTester(async.eachOf, identity, _findGetResult);
+ async.detectSeries = _createTester(async.eachOfSeries, identity, _findGetResult);
+ async.detectLimit = _createTester(async.eachOfLimit, identity, _findGetResult);
+
+ 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 {
+ callback(null, _map(results.sort(comparator), function (x) {
+ return x.value;
+ }));
+ }
+
+ });
+
+ function comparator(left, right) {
+ var a = left.criteria, b = right.criteria;
+ return a < b ? -1 : a > b ? 1 : 0;
+ }
+ };
+
+ async.auto = function (tasks, concurrency, callback) {
+ if (typeof arguments[1] === 'function') {
+ // concurrency is optional, shift the args.
+ callback = concurrency;
+ concurrency = null;
+ }
+ callback = _once(callback || noop);
+ var keys = _keys(tasks);
+ var remainingTasks = keys.length;
+ if (!remainingTasks) {
+ return callback(null);
+ }
+ if (!concurrency) {
+ concurrency = remainingTasks;
+ }
+
+ var results = {};
+ var runningTasks = 0;
+
+ var hasError = false;
+
+ var listeners = [];
+ function addListener(fn) {
+ listeners.unshift(fn);
+ }
+ function removeListener(fn) {
+ var idx = _indexOf(listeners, fn);
+ if (idx >= 0) listeners.splice(idx, 1);
+ }
+ function taskComplete() {
+ remainingTasks--;
+ _arrayEach(listeners.slice(0), function (fn) {
+ fn();
+ });
+ }
+
+ addListener(function () {
+ if (!remainingTasks) {
+ callback(null, results);
+ }
+ });
+
+ _arrayEach(keys, function (k) {
+ if (hasError) return;
+ var task = _isArray(tasks[k]) ? tasks[k]: [tasks[k]];
+ var taskCallback = _restParam(function(err, args) {
+ runningTasks--;
+ if (args.length <= 1) {
+ args = args[0];
+ }
+ if (err) {
+ var safeResults = {};
+ _forEachOf(results, function(val, rkey) {
+ safeResults[rkey] = val;
+ });
+ safeResults[k] = args;
+ hasError = true;
+
+ callback(err, safeResults);
+ }
+ else {
+ results[k] = args;
+ async.setImmediate(taskComplete);
+ }
+ });
+ var requires = task.slice(0, task.length - 1);
+ // prevent dead-locks
+ var len = requires.length;
+ var dep;
+ while (len--) {
+ if (!(dep = tasks[requires[len]])) {
+ throw new Error('Has nonexistent dependency in ' + requires.join(', '));
+ }
+ if (_isArray(dep) && _indexOf(dep, k) >= 0) {
+ throw new Error('Has cyclic dependencies');
+ }
+ }
+ function ready() {
+ return runningTasks < concurrency && _reduce(requires, function (a, x) {
+ return (a && results.hasOwnProperty(x));
+ }, true) && !results.hasOwnProperty(k);
+ }
+ if (ready()) {
+ runningTasks++;
+ task[task.length - 1](taskCallback, results);
+ }
+ else {
+ addListener(listener);
+ }
+ function listener() {
+ if (ready()) {
+ runningTasks++;
+ removeListener(listener);
+ task[task.length - 1](taskCallback, results);
+ }
+ }
+ });
+ };
+
+
+
+ async.retry = function(times, task, callback) {
+ var DEFAULT_TIMES = 5;
+ var DEFAULT_INTERVAL = 0;
+
+ var attempts = [];
+
+ var opts = {
+ times: DEFAULT_TIMES,
+ interval: DEFAULT_INTERVAL
+ };
+
+ function parseTimes(acc, t){
+ if(typeof t === 'number'){
+ acc.times = parseInt(t, 10) || DEFAULT_TIMES;
+ } else if(typeof t === 'object'){
+ acc.times = parseInt(t.times, 10) || DEFAULT_TIMES;
+ acc.interval = parseInt(t.interval, 10) || DEFAULT_INTERVAL;
+ } else {
+ throw new Error('Unsupported argument type for \'times\': ' + typeof t);
+ }
+ }
+
+ var length = arguments.length;
+ if (length < 1 || length > 3) {
+ throw new Error('Invalid arguments - must be either (task), (task, callback), (times, task) or (times, task, callback)');
+ } else if (length <= 2 && typeof times === 'function') {
+ callback = task;
+ task = times;
+ }
+ if (typeof times !== 'function') {
+ parseTimes(opts, times);
+ }
+ opts.callback = callback;
+ opts.task = task;
+
+ function wrappedTask(wrappedCallback, wrappedResults) {
+ function retryAttempt(task, finalAttempt) {
+ return function(seriesCallback) {
+ task(function(err, result){
+ seriesCallback(!err || finalAttempt, {err: err, result: result});
+ }, wrappedResults);
+ };
+ }
+
+ function retryInterval(interval){
+ return function(seriesCallback){
+ setTimeout(function(){
+ seriesCallback(null);
+ }, interval);
+ };
+ }
+
+ while (opts.times) {
+
+ var finalAttempt = !(opts.times-=1);
+ attempts.push(retryAttempt(opts.task, finalAttempt));
+ if(!finalAttempt && opts.interval > 0){
+ attempts.push(retryInterval(opts.interval));
+ }
+ }
+
+ async.series(attempts, function(done, data){
+ data = data[data.length - 1];
+ (wrappedCallback || opts.callback)(data.err, data.result);
+ });
+ }
+
+ // If a callback is passed, run this as a controll flow
+ return opts.callback ? wrappedTask() : wrappedTask;
+ };
+
+ async.waterfall = function (tasks, callback) {
+ callback = _once(callback || noop);
+ 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();
+ }
+ function wrapIterator(iterator) {
+ return _restParam(function (err, args) {
+ if (err) {
+ callback.apply(null, [err].concat(args));
+ }
+ else {
+ var next = iterator.next();
+ if (next) {
+ args.push(wrapIterator(next));
+ }
+ else {
+ args.push(callback);
+ }
+ ensureAsync(iterator).apply(null, args);
+ }
+ });
+ }
+ wrapIterator(async.iterator(tasks))();
+ };
+
+ function _parallel(eachfn, tasks, callback) {
+ callback = callback || noop;
+ var results = _isArrayLike(tasks) ? [] : {};
+
+ eachfn(tasks, function (task, key, callback) {
+ task(_restParam(function (err, args) {
+ if (args.length <= 1) {
+ args = args[0];
+ }
+ results[key] = args;
+ callback(err);
+ }));
+ }, function (err) {
+ callback(err, results);
+ });
+ }
+
+ async.parallel = function (tasks, callback) {
+ _parallel(async.eachOf, tasks, callback);
+ };
+
+ async.parallelLimit = function(tasks, limit, callback) {
+ _parallel(_eachOfLimit(limit), tasks, callback);
+ };
+
+ async.series = function(tasks, callback) {
+ _parallel(async.eachOfSeries, tasks, callback);
+ };
+
+ async.iterator = function (tasks) {
+ function makeCallback(index) {
+ function fn() {
+ 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 = _restParam(function (fn, args) {
+ return _restParam(function (callArgs) {
+ return fn.apply(
+ null, args.concat(callArgs)
+ );
+ });
+ });
+
+ function _concat(eachfn, arr, fn, callback) {
+ var result = [];
+ eachfn(arr, function (x, index, cb) {
+ fn(x, function (err, y) {
+ result = result.concat(y || []);
+ cb(err);
+ });
+ }, function (err) {
+ callback(err, result);
+ });
+ }
+ async.concat = doParallel(_concat);
+ async.concatSeries = doSeries(_concat);
+
+ async.whilst = function (test, iterator, callback) {
+ callback = callback || noop;
+ if (test()) {
+ var next = _restParam(function(err, args) {
+ if (err) {
+ callback(err);
+ } else if (test.apply(this, args)) {
+ iterator(next);
+ } else {
+ callback.apply(null, [null].concat(args));
+ }
+ });
+ iterator(next);
+ } else {
+ callback(null);
+ }
+ };
+
+ async.doWhilst = function (iterator, test, callback) {
+ var calls = 0;
+ return async.whilst(function() {
+ return ++calls <= 1 || test.apply(this, arguments);
+ }, iterator, callback);
+ };
+
+ async.until = function (test, iterator, callback) {
+ return async.whilst(function() {
+ return !test.apply(this, arguments);
+ }, iterator, callback);
+ };
+
+ async.doUntil = function (iterator, test, callback) {
+ return async.doWhilst(iterator, function() {
+ return !test.apply(this, arguments);
+ }, callback);
+ };
+
+ async.during = function (test, iterator, callback) {
+ callback = callback || noop;
+
+ var next = _restParam(function(err, args) {
+ if (err) {
+ callback(err);
+ } else {
+ args.push(check);
+ test.apply(this, args);
+ }
+ });
+
+ var check = function(err, truth) {
+ if (err) {
+ callback(err);
+ } else if (truth) {
+ iterator(next);
+ } else {
+ callback(null);
+ }
+ };
+
+ test(check);
+ };
+
+ async.doDuring = function (iterator, test, callback) {
+ var calls = 0;
+ async.during(function(next) {
+ if (calls++ < 1) {
+ next(null, true);
+ } else {
+ test.apply(this, arguments);
+ }
+ }, iterator, callback);
+ };
+
+ function _queue(worker, concurrency, payload) {
+ if (concurrency == null) {
+ concurrency = 1;
+ }
+ else if(concurrency === 0) {
+ throw new Error('Concurrency must not be zero');
+ }
+ function _insert(q, data, pos, callback) {
+ if (callback != null && typeof callback !== "function") {
+ throw new Error("task callback must be a function");
+ }
+ q.started = true;
+ if (!_isArray(data)) {
+ data = [data];
+ }
+ if(data.length === 0 && q.idle()) {
+ // call drain immediately if there are no tasks
+ return async.setImmediate(function() {
+ q.drain();
+ });
+ }
+ _arrayEach(data, function(task) {
+ var item = {
+ data: task,
+ callback: callback || noop
+ };
+
+ if (pos) {
+ q.tasks.unshift(item);
+ } else {
+ q.tasks.push(item);
+ }
+
+ if (q.tasks.length === q.concurrency) {
+ q.saturated();
+ }
+ });
+ async.setImmediate(q.process);
+ }
+ function _next(q, tasks) {
+ return function(){
+ workers -= 1;
+
+ var removed = false;
+ var args = arguments;
+ _arrayEach(tasks, function (task) {
+ _arrayEach(workersList, function (worker, index) {
+ if (worker === task && !removed) {
+ workersList.splice(index, 1);
+ removed = true;
+ }
+ });
+
+ task.callback.apply(task, args);
+ });
+ if (q.tasks.length + workers === 0) {
+ q.drain();
+ }
+ q.process();
+ };
+ }
+
+ var workers = 0;
+ var workersList = [];
+ var q = {
+ tasks: [],
+ concurrency: concurrency,
+ payload: payload,
+ saturated: noop,
+ empty: noop,
+ drain: noop,
+ started: false,
+ paused: false,
+ push: function (data, callback) {
+ _insert(q, data, false, callback);
+ },
+ kill: function () {
+ q.drain = noop;
+ q.tasks = [];
+ },
+ unshift: function (data, callback) {
+ _insert(q, data, true, callback);
+ },
+ process: function () {
+ while(!q.paused && workers < q.concurrency && q.tasks.length){
+
+ var tasks = q.payload ?
+ q.tasks.splice(0, q.payload) :
+ q.tasks.splice(0, q.tasks.length);
+
+ var data = _map(tasks, function (task) {
+ return task.data;
+ });
+
+ if (q.tasks.length === 0) {
+ q.empty();
+ }
+ workers += 1;
+ workersList.push(tasks[0]);
+ var cb = only_once(_next(q, tasks));
+ worker(data, cb);
+ }
+ },
+ length: function () {
+ return q.tasks.length;
+ },
+ running: function () {
+ return workers;
+ },
+ workersList: function () {
+ return workersList;
+ },
+ idle: function() {
+ return q.tasks.length + workers === 0;
+ },
+ pause: function () {
+ q.paused = true;
+ },
+ resume: function () {
+ if (q.paused === false) { return; }
+ q.paused = false;
+ var resumeCount = Math.min(q.concurrency, q.tasks.length);
+ // Need to call q.process once per concurrent
+ // worker to preserve full concurrency after pause
+ for (var w = 1; w <= resumeCount; w++) {
+ async.setImmediate(q.process);
+ }
+ }
+ };
+ return q;
+ }
+
+ async.queue = function (worker, concurrency) {
+ var q = _queue(function (items, cb) {
+ worker(items[0], cb);
+ }, concurrency, 1);
+
+ return q;
+ };
+
+ async.priorityQueue = function (worker, concurrency) {
+
+ function _compareTasks(a, b){
+ return a.priority - b.priority;
+ }
+
+ function _binarySearch(sequence, item, compare) {
+ var beg = -1,
+ end = sequence.length - 1;
+ while (beg < end) {
+ var mid = beg + ((end - beg + 1) >>> 1);
+ if (compare(item, sequence[mid]) >= 0) {
+ beg = mid;
+ } else {
+ end = mid - 1;
+ }
+ }
+ return beg;
+ }
+
+ function _insert(q, data, priority, callback) {
+ if (callback != null && typeof callback !== "function") {
+ throw new Error("task callback must be a function");
+ }
+ q.started = true;
+ if (!_isArray(data)) {
+ data = [data];
+ }
+ if(data.length === 0) {
+ // call drain immediately if there are no tasks
+ return async.setImmediate(function() {
+ q.drain();
+ });
+ }
+ _arrayEach(data, function(task) {
+ var item = {
+ data: task,
+ priority: priority,
+ callback: typeof callback === 'function' ? callback : noop
+ };
+
+ q.tasks.splice(_binarySearch(q.tasks, item, _compareTasks) + 1, 0, item);
+
+ if (q.tasks.length === q.concurrency) {
+ q.saturated();
+ }
+ async.setImmediate(q.process);
+ });
+ }
+
+ // Start with a normal queue
+ var q = async.queue(worker, concurrency);
+
+ // Override push to accept second parameter representing priority
+ q.push = function (data, priority, callback) {
+ _insert(q, data, priority, callback);
+ };
+
+ // Remove unshift function
+ delete q.unshift;
+
+ return q;
+ };
+
+ async.cargo = function (worker, payload) {
+ return _queue(worker, 1, payload);
+ };
+
+ function _console_fn(name) {
+ return _restParam(function (fn, args) {
+ fn.apply(null, args.concat([_restParam(function (err, args) {
+ if (typeof console === 'object') {
+ if (err) {
+ if (console.error) {
+ console.error(err);
+ }
+ }
+ else if (console[name]) {
+ _arrayEach(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 = {};
+ var has = Object.prototype.hasOwnProperty;
+ hasher = hasher || identity;
+ var memoized = _restParam(function memoized(args) {
+ var callback = args.pop();
+ var key = hasher.apply(null, args);
+ if (has.call(memo, key)) {
+ async.setImmediate(function () {
+ callback.apply(null, memo[key]);
+ });
+ }
+ else if (has.call(queues, key)) {
+ queues[key].push(callback);
+ }
+ else {
+ queues[key] = [callback];
+ fn.apply(null, args.concat([_restParam(function (args) {
+ memo[key] = args;
+ var q = queues[key];
+ delete queues[key];
+ for (var i = 0, l = q.length; i < l; i++) {
+ q[i].apply(null, args);
+ }
+ })]));
+ }
+ });
+ memoized.memo = memo;
+ memoized.unmemoized = fn;
+ return memoized;
+ };
+
+ async.unmemoize = function (fn) {
+ return function () {
+ return (fn.unmemoized || fn).apply(null, arguments);
+ };
+ };
+
+ function _times(mapper) {
+ return function (count, iterator, callback) {
+ mapper(_range(count), iterator, callback);
+ };
+ }
+
+ async.times = _times(async.map);
+ async.timesSeries = _times(async.mapSeries);
+ async.timesLimit = function (count, limit, iterator, callback) {
+ return async.mapLimit(_range(count), limit, iterator, callback);
+ };
+
+ async.seq = function (/* functions... */) {
+ var fns = arguments;
+ return _restParam(function (args) {
+ var that = this;
+
+ var callback = args[args.length - 1];
+ if (typeof callback == 'function') {
+ args.pop();
+ } else {
+ callback = noop;
+ }
+
+ async.reduce(fns, args, function (newargs, fn, cb) {
+ fn.apply(that, newargs.concat([_restParam(function (err, nextargs) {
+ 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));
+ };
+
+
+ function _applyEach(eachfn) {
+ return _restParam(function(fns, args) {
+ var go = _restParam(function(args) {
+ var that = this;
+ var callback = args.pop();
+ return eachfn(fns, function (fn, _, cb) {
+ fn.apply(that, args.concat([cb]));
+ },
+ callback);
+ });
+ if (args.length) {
+ return go.apply(this, args);
+ }
+ else {
+ return go;
+ }
+ });
+ }
+
+ async.applyEach = _applyEach(async.eachOf);
+ async.applyEachSeries = _applyEach(async.eachOfSeries);
+
+
+ async.forever = function (fn, callback) {
+ var done = only_once(callback || noop);
+ var task = ensureAsync(fn);
+ function next(err) {
+ if (err) {
+ return done(err);
+ }
+ task(next);
+ }
+ next();
+ };
+
+ function ensureAsync(fn) {
+ return _restParam(function (args) {
+ var callback = args.pop();
+ args.push(function () {
+ var innerArgs = arguments;
+ if (sync) {
+ async.setImmediate(function () {
+ callback.apply(null, innerArgs);
+ });
+ } else {
+ callback.apply(null, innerArgs);
+ }
+ });
+ var sync = true;
+ fn.apply(this, args);
+ sync = false;
+ });
+ }
+
+ async.ensureAsync = ensureAsync;
+
+ async.constant = _restParam(function(values) {
+ var args = [null].concat(values);
+ return function (callback) {
+ return callback.apply(this, args);
+ };
+ });
+
+ async.wrapSync =
+ async.asyncify = function asyncify(func) {
+ return _restParam(function (args) {
+ var callback = args.pop();
+ var result;
+ try {
+ result = func.apply(this, args);
+ } catch (e) {
+ return callback(e);
+ }
+ // if result is Promise object
+ if (_isObject(result) && typeof result.then === "function") {
+ result.then(function(value) {
+ callback(null, value);
+ })["catch"](function(err) {
+ callback(err.message ? err : new Error(err));
+ });
+ } else {
+ callback(null, result);
+ }
+ });
+ };
+
+ // Node.js
+ if (typeof module === 'object' && module.exports) {
+ module.exports = async;
+ }
+ // AMD / RequireJS
+ else if (typeof define === 'function' && define.amd) {
+ define([], function () {
+ return async;
+ });
+ }
+ // included directly via <script> tag
+ else {
+ root.async = async;
+ }
+
+}());
Code Review / simantics / district.git / blobdiff