Additional methods for $q

$q-decorator

var qDecorator = function($delegate) {

  /**
   * Similar to $q.reject, this is a convenience method to create and resolve a Promise.
   * @param {Object} data Value to resolve the promise with
   * @returns {Promise} A resolved promise
   */
  $delegate.resolve = function(data) {
    var deferred = this.defer();
    deferred.resolve(data);

    return deferred.promise;
  };

  /**
   * Similar to $q.all but waits for all promises to resolve/reject before resolving/rejecting.
   * @param {Array} promises Array of promises
   * @returns {Promise} A promise to be resolved or rejected once all of the observed promises complete
   */
  $delegate.waitForAll = function(promises) {
    var deferred = this.defer();
    var results = [];
    var counter = 0;
    var errored = false;

    var udpateResult = function(key, data) {
      if (!results.hasOwnProperty(key)) {
        results[key] = data;

        counter--;
      }

      checkForDone();
    };

    var checkForDone = function() {
      if (counter === 0) {
        if (errored) {
          deferred.reject(results);
        } else {
          deferred.resolve(results);
        }
      }
    };

    angular.forEach(promises, function(promise, key) {
      counter++;

      promise.then(
        function(data) {
          udpateResult(key, data);
        },
        function(data) {
          errored = true;

          udpateResult(key, data);
        });
    });

    checkForDone(); // Handle empty Array

    return deferred.promise;
  };

  return $delegate;
};

angular.module('myApp').config(
  function($provide) {
    $provide.decorator('$q', qDecorator);
  });