authentication.js

'use strict';

(function() {
  var app = angular.module('services', []);

  app.factory('AuthenticationService', ['$http', '$q', '$localStorage',
    function($http, $q, $localStorage) {

    return {
      login: function(credentials) {
        var promise = $http.post('http://localhost:3000/api/users/sign_in',
          credentials).
          then(function(response) {
            if(response.data.success) { 
              //respond with currentUser(response.data)
              return response.data;
            }
          }, function(response) {
            console.log('FAILURE!');
            return $q.reject(response.data);
          });
        return promise;
      },

      clearStorage: function() {
        var defer = $q.defer();
        if($localStorage.$reset()) {
          defer.resolve('storage cleared.');
        }
        return defer.promise;
      },

      logout: function() {
        var promise = $http.delete('http://localhost:3000/api/users/sign_out').
          then(function(response) {
            if(response.data.success) {
              return response.data;
            }
          }, function(response) {
            console.log('FAILURE IN SIGN OUT');
            return $q.reject(response.data);
          });
        return promise;  
      },

      isSignedIn: function() {
        var currentUser = $localStorage.user;
        var signedIn = (currentUser === undefined || currentUser === null) ?
          false : true;
        return signedIn;
      },

      getCurrentUser: function() {
        if(this.isSignedIn()) {
          var currentUser = $localStorage.user;
          return currentUser;
        } else {
          return null;
        }
      }
    };
  }]);

})();