gistfile1.js

app.factory('userService', ['$q', '$timeout', '$http', '$rootScope', function($q, $timeout, $http, $rootScope) {
  var userService = {};

  userService.tryLoginFromCookie = function() {
    var promise = $q.defer();
    
    $http({method: 'POST', url: '/login'}).
    success(function(data, status, headers, config) {
      $timeout(function() {
        $rootScope.$broadcast('login', data); 
      });
    }).
    error(function(data, status, headers, config) {
      console.log("Error");
      // called asynchronously if an error occurs
      // or server returns response with an error status.
    });

    return promise;
  };

  userService.login = function() {

  };

  userService.register = function() {

  };

  userService.logout = function() {

  };

  return userService;
}]);