services.factory('UserService', [function() { 
var sdo = { 
isLogged: false, 
username: '' 
}; 
return sdo; 
}]);

var controllers = angular.module('myApp.controllers', []);
/* ... */
controllers.controller('loginController', ['$scope', '$http', 'UserService', function(scope, $http, User) {
}]);

scope.login = function() { 
var config = { /* ... */ } // configuration object
$http(config) 
.success(function(data, status, headers, config) { 
if (data.status) { 
// succefull login 
User.isLogged = true; 
User.username = data.username; 
} 
else { 
User.isLogged = false; 
User.username = ''; 
} 
}) 
.error(function(data, status, headers, config) { 
User.isLogged = false; 
User.username = ''; 
}); 
}

app.config(['$routeProvider', function($routeProvider) { 
$routeProvider.when('/login', { templateUrl: 'partials/login.html', controller: 'loginCtrl' , access: {isFree: true}}); 
$routeProvider.when('/main', { templateUrl: 'partials/main.html', controller: 'mainCtrl' }); 
$routeProvider.otherwise({ redirectTo: '/main' }); 
}]);

directives.directive('checkUser', ['$rootScope', '$location', 'userSrv', function ($root, $location, userSrv) { 
return { 
link: function (scope, elem, attrs, ctrl) { 
$root.$on('$routeChangeStart', function(event, currRoute, prevRoute){ 
if (!prevRoute.access.isFree && !userSrv.isLogged) { 
// reload the login route 
} 
/* 
* IMPORTANT: 
* It's not difficult to fool the previous control, 
* so it's really IMPORTANT to repeat the control also in the backend, 
* before sending back from the server reserved information. 
*/ 
}); 
} 
} 
}]);