Angular session

app.js

'use strict';

angular
  .module('myApp', ['ngCookies', 'ngRoute'])
  .service('Auth', ['$cookieStore', function ($cookieStore) {
    var me = this;
    
    me.authenticate = function (token) {
      if (token) $cookieStore.put('token', token);
      
      return $cookieStore.get('token');
    };
    
    me.data = function (data) {
      if (data) $cookieStore.put('data', data);
      
      return $cookieStore.get('data');
    };
  }])
  .config(['$routeProvider', function ($routeProvider) {
    $routeProvider
      .when('/', {
        controller: 'MainCtrl',
        templateUrl: 'views/main.html'
      })
      .when('/login', {
        controller: 'LoginCtrl',
        templateUrl: 'views/login.html'
      })
      .otherwise({
        templateUrl: 'views/404.html'
      });
  }])
  .controller('MainCtrl', ['$scope', 'Auth', function ($scope, Auth) {
    $scope.data = Auth.data();
  }])
  .controller('LoginCtrl', ['$scope', '$http', '$location', 'Auth', function ($scope, $http, $location, Auth) {
    $scope.login = function (username, password) {
      $http.post('/login', {username: username, password: password})
        .$promise.then(function (res) {
          Auth.authenticate(res.token);
          Auth.data(res.data);
          $location.path('/').replace();
        }, function (err) {
          $scope.error = err;
        });
    };
  }])
  .run(['$rootScope', '$location', 'Auth', function ($rootScope, $location, Auth) {
    $rootScope.$on('$routeChangeStart', function (event) {
      if ($location.path() !== '/login') {
        var token = Auth.authenticate();
        
        if (token && token.length > 0) {
          event.preventDefault();
          $location.path('/login').replace();
        }
      }
    });
  }])