closedquestion-8.x-3.x-dev/assets/js/libraries/promise-polyfill/promise-polyfill.js

/**
 promise-polyfill
 https://github.com/taylorhakes/promise-polyfill

 Copyright (c) 2014 Taylor Hakes
 Copyright (c) 2014 Forbes Lindesay

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
(function (root) {

  // Store setTimeout reference so promise-polyfill will be unaffected by
  // other code modifying setTimeout (like sinon.useFakeTimers())
  var setTimeoutFunc = setTimeout;

  function noop() {
  }

  // Use polyfill for setImmediate for performance gains
  var asap = (typeof setImmediate === 'function' && setImmediate) ||
    function (fn) {
      setTimeoutFunc(fn, 0);
    };

  var onUnhandledRejection = function onUnhandledRejection(err) {
    if (typeof console !== 'undefined' && console) {
      console.warn('Possible Unhandled Promise Rejection:', err); // eslint-disable-line no-console
    }
  };

  // Polyfill for Function.prototype.bind
  function bind(fn, thisArg) {
    return function () {
      fn.apply(thisArg, arguments);
    };
  }

  function Promise(fn) {
    if (typeof this !== 'object')
      throw new TypeError('Promises must be constructed via new');
    if (typeof fn !== 'function')
      throw new TypeError('not a function');
    this._state = 0;
    this._handled = false;
    this._value = undefined;
    this._deferreds = [];

    doResolve(fn, this);
  }

  function handle(self, deferred) {
    while (self._state === 3) {
      self = self._value;
    }
    if (self._state === 0) {
      self._deferreds.push(deferred);
      return;
    }
    self._handled = true;
    asap(function () {
      var cb = self._state === 1 ? deferred.onFulfilled : deferred.onRejected;
      if (cb === null) {
        (self._state === 1 ? resolve : reject)(deferred.promise, self._value);
        return;
      }
      var ret;
      try {
        ret = cb(self._value);
      } catch (e) {
        reject(deferred.promise, e);
        return;
      }
      resolve(deferred.promise, ret);
    });
  }

  function resolve(self, newValue) {
    try {
      // Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
      if (newValue === self)
        throw new TypeError('A promise cannot be resolved with itself.');
      if (newValue && (typeof newValue === 'object' || typeof newValue === 'function')) {
        var then = newValue.then;
        if (newValue instanceof Promise) {
          self._state = 3;
          self._value = newValue;
          finale(self);
          return;
        }
        else if (typeof then === 'function') {
          doResolve(bind(then, newValue), self);
          return;
        }
      }
      self._state = 1;
      self._value = newValue;
      finale(self);
    } catch (e) {
      reject(self, e);
    }
  }

  function reject(self, newValue) {
    self._state = 2;
    self._value = newValue;
    finale(self);
  }

  function finale(self) {
    if (self._state === 2 && self._deferreds.length === 0) {
      asap(function () {
        if (!self._handled) {
          onUnhandledRejection(self._value);
        }
      });
    }

    for (var i = 0, len = self._deferreds.length; i < len; i++) {
      handle(self, self._deferreds[i]);
    }
    self._deferreds = null;
  }

  function Handler(onFulfilled, onRejected, promise) {
    this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
    this.onRejected = typeof onRejected === 'function' ? onRejected : null;
    this.promise = promise;
  }

  /**
   * Take a potentially misbehaving resolver function and make sure
   * onFulfilled and onRejected are only called once.
   *
   * Makes no guarantees about asynchrony.
   */
  function doResolve(fn, self) {
    var done = false;
    try {
      fn(function (value) {
        if (done)
          return;
        done = true;
        resolve(self, value);
      }, function (reason) {
        if (done)
          return;
        done = true;
        reject(self, reason);
      });
    } catch (ex) {
      if (done)
        return;
      done = true;
      reject(self, ex);
    }
  }

  Promise.prototype['catch'] = function (onRejected) {
    return this.then(null, onRejected);
  };

  Promise.prototype.then = function (onFulfilled, onRejected) {
    var prom = new (this.constructor)(noop);

    handle(this, new Handler(onFulfilled, onRejected, prom));
    return prom;
  };

  Promise.all = function (arr) {
    var args = Array.prototype.slice.call(arr);

    return new Promise(function (resolve, reject) {
      if (args.length === 0)
        return resolve([]);
      var remaining = args.length;

      function res(i, val) {
        try {
          if (val && (typeof val === 'object' || typeof val === 'function')) {
            var then = val.then;
            if (typeof then === 'function') {
              then.call(val, function (val) {
                res(i, val);
              }, reject);
              return;
            }
          }
          args[i] = val;
          if (--remaining === 0) {
            resolve(args);
          }
        } catch (ex) {
          reject(ex);
        }
      }

      for (var i = 0; i < args.length; i++) {
        res(i, args[i]);
      }
    });
  };

  Promise.resolve = function (value) {
    if (value && typeof value === 'object' && value.constructor === Promise) {
      return value;
    }

    return new Promise(function (resolve) {
      resolve(value);
    });
  };

  Promise.reject = function (value) {
    return new Promise(function (resolve, reject) {
      reject(value);
    });
  };

  Promise.race = function (values) {
    return new Promise(function (resolve, reject) {
      for (var i = 0, len = values.length; i < len; i++) {
        values[i].then(resolve, reject);
      }
    });
  };

  /**
   * Set the immediate function to execute callbacks
   * @param fn {function} Function to execute
   * @private
   */
  Promise._setImmediateFn = function _setImmediateFn(fn) {
    asap = fn;
  };

  Promise._setUnhandledRejectionFn = function _setUnhandledRejectionFn(fn) {
    onUnhandledRejection = fn;
  };

  if (typeof module !== 'undefined' && module.exports) {
    module.exports = Promise;
  }
  else if (!root.Promise) {
    root.Promise = Promise;
  }

})(window);