--- /dev/null
+'use strict';
+
+var PENDING = 'pending';
+var SETTLED = 'settled';
+var FULFILLED = 'fulfilled';
+var REJECTED = 'rejected';
+var NOOP = function () {};
+var isNode = typeof global !== 'undefined' && typeof global.process !== 'undefined' && typeof global.process.emit === 'function';
+
+var asyncSetTimer = typeof setImmediate === 'undefined' ? setTimeout : setImmediate;
+var asyncQueue = [];
+var asyncTimer;
+
+function asyncFlush() {
+ // run promise callbacks
+ for (var i = 0; i < asyncQueue.length; i++) {
+ asyncQueue[i][0](asyncQueue[i][1]);
+ }
+
+ // reset async asyncQueue
+ asyncQueue = [];
+ asyncTimer = false;
+}
+
+function asyncCall(callback, arg) {
+ asyncQueue.push([callback, arg]);
+
+ if (!asyncTimer) {
+ asyncTimer = true;
+ asyncSetTimer(asyncFlush, 0);
+ }
+}
+
+function invokeResolver(resolver, promise) {
+ function resolvePromise(value) {
+ resolve(promise, value);
+ }
+
+ function rejectPromise(reason) {
+ reject(promise, reason);
+ }
+
+ try {
+ resolver(resolvePromise, rejectPromise);
+ } catch (e) {
+ rejectPromise(e);
+ }
+}
+
+function invokeCallback(subscriber) {
+ var owner = subscriber.owner;
+ var settled = owner._state;
+ var value = owner._data;
+ var callback = subscriber[settled];
+ var promise = subscriber.then;
+
+ if (typeof callback === 'function') {
+ settled = FULFILLED;
+ try {
+ value = callback(value);
+ } catch (e) {
+ reject(promise, e);
+ }
+ }
+
+ if (!handleThenable(promise, value)) {
+ if (settled === FULFILLED) {
+ resolve(promise, value);
+ }
+
+ if (settled === REJECTED) {
+ reject(promise, value);
+ }
+ }
+}
+
+function handleThenable(promise, value) {
+ var resolved;
+
+ try {
+ if (promise === value) {
+ throw new TypeError('A promises callback cannot return that same promise.');
+ }
+
+ if (value && (typeof value === 'function' || typeof value === 'object')) {
+ // then should be retrieved only once
+ var then = value.then;
+
+ if (typeof then === 'function') {
+ then.call(value, function (val) {
+ if (!resolved) {
+ resolved = true;
+
+ if (value === val) {
+ fulfill(promise, val);
+ } else {
+ resolve(promise, val);
+ }
+ }
+ }, function (reason) {
+ if (!resolved) {
+ resolved = true;
+
+ reject(promise, reason);
+ }
+ });
+
+ return true;
+ }
+ }
+ } catch (e) {
+ if (!resolved) {
+ reject(promise, e);
+ }
+
+ return true;
+ }
+
+ return false;
+}
+
+function resolve(promise, value) {
+ if (promise === value || !handleThenable(promise, value)) {
+ fulfill(promise, value);
+ }
+}
+
+function fulfill(promise, value) {
+ if (promise._state === PENDING) {
+ promise._state = SETTLED;
+ promise._data = value;
+
+ asyncCall(publishFulfillment, promise);
+ }
+}
+
+function reject(promise, reason) {
+ if (promise._state === PENDING) {
+ promise._state = SETTLED;
+ promise._data = reason;
+
+ asyncCall(publishRejection, promise);
+ }
+}
+
+function publish(promise) {
+ promise._then = promise._then.forEach(invokeCallback);
+}
+
+function publishFulfillment(promise) {
+ promise._state = FULFILLED;
+ publish(promise);
+}
+
+function publishRejection(promise) {
+ promise._state = REJECTED;
+ publish(promise);
+ if (!promise._handled && isNode) {
+ global.process.emit('unhandledRejection', promise._data, promise);
+ }
+}
+
+function notifyRejectionHandled(promise) {
+ global.process.emit('rejectionHandled', promise);
+}
+
+/**
+ * @class
+ */
+function Promise(resolver) {
+ if (typeof resolver !== 'function') {
+ throw new TypeError('Promise resolver ' + resolver + ' is not a function');
+ }
+
+ if (this instanceof Promise === false) {
+ throw new TypeError('Failed to construct \'Promise\': Please use the \'new\' operator, this object constructor cannot be called as a function.');
+ }
+
+ this._then = [];
+
+ invokeResolver(resolver, this);
+}
+
+Promise.prototype = {
+ constructor: Promise,
+
+ _state: PENDING,
+ _then: null,
+ _data: undefined,
+ _handled: false,
+
+ then: function (onFulfillment, onRejection) {
+ var subscriber = {
+ owner: this,
+ then: new this.constructor(NOOP),
+ fulfilled: onFulfillment,
+ rejected: onRejection
+ };
+
+ if ((onRejection || onFulfillment) && !this._handled) {
+ this._handled = true;
+ if (this._state === REJECTED && isNode) {
+ asyncCall(notifyRejectionHandled, this);
+ }
+ }
+
+ if (this._state === FULFILLED || this._state === REJECTED) {
+ // already resolved, call callback async
+ asyncCall(invokeCallback, subscriber);
+ } else {
+ // subscribe
+ this._then.push(subscriber);
+ }
+
+ return subscriber.then;
+ },
+
+ catch: function (onRejection) {
+ return this.then(null, onRejection);
+ }
+};
+
+Promise.all = function (promises) {
+ if (!Array.isArray(promises)) {
+ throw new TypeError('You must pass an array to Promise.all().');
+ }
+
+ return new Promise(function (resolve, reject) {
+ var results = [];
+ var remaining = 0;
+
+ function resolver(index) {
+ remaining++;
+ return function (value) {
+ results[index] = value;
+ if (!--remaining) {
+ resolve(results);
+ }
+ };
+ }
+
+ for (var i = 0, promise; i < promises.length; i++) {
+ promise = promises[i];
+
+ if (promise && typeof promise.then === 'function') {
+ promise.then(resolver(i), reject);
+ } else {
+ results[i] = promise;
+ }
+ }
+
+ if (!remaining) {
+ resolve(results);
+ }
+ });
+};
+
+Promise.race = function (promises) {
+ if (!Array.isArray(promises)) {
+ throw new TypeError('You must pass an array to Promise.race().');
+ }
+
+ return new Promise(function (resolve, reject) {
+ for (var i = 0, promise; i < promises.length; i++) {
+ promise = promises[i];
+
+ if (promise && typeof promise.then === 'function') {
+ promise.then(resolve, reject);
+ } else {
+ resolve(promise);
+ }
+ }
+ });
+};
+
+Promise.resolve = function (value) {
+ if (value && typeof value === 'object' && value.constructor === Promise) {
+ return value;
+ }
+
+ return new Promise(function (resolve) {
+ resolve(value);
+ });
+};
+
+Promise.reject = function (reason) {
+ return new Promise(function (resolve, reject) {
+ reject(reason);
+ });
+};
+
+module.exports = Promise;
projects / dotfiles / .git / blobdiff