Filter states for which login is required during state change

A state parameter was added for the routes that require user authentication. Now, everytime a statechange occurs, the destination state is checked and user is redirected to signin page if necessary. Note the state parameter is added within `data`, so that nested states can inherent its value.

modules/articles/client/config/articles.client.routes.js

@@ -16,15 +16,21 @@ angular.module('articles').config(['$stateProvider',
 		}).
 		state('articles.create', {
 			url: '/create',
-			templateUrl: 'modules/articles/views/create-article.client.view.html'
+			templateUrl: 'modules/articles/views/create-article.client.view.html',
+			data: {
+				requiresLogin: true
+			}
 		}).
 		state('articles.view', {
 			url: '/:articleId',
 			templateUrl: 'modules/articles/views/view-article.client.view.html'
 		}).
 		state('articles.edit', {
 			url: '/:articleId/edit',
-			templateUrl: 'modules/articles/views/edit-article.client.view.html'
+			templateUrl: 'modules/articles/views/edit-article.client.view.html',
+			data: {
+				requiresLogin: true
+			}
 		});
 	}
 ]);

modules/core/client/app/init.js

@@ -10,6 +10,20 @@ angular.module(ApplicationConfiguration.applicationModuleName).config(['$locatio
 	}
 ]);
 
+angular.module(ApplicationConfiguration.applicationModuleName).run(function($rootScope, $state, Authentication) {
+    // Check authentication before changing state
+    $rootScope.$on('$stateChangeStart', function(event, toState, toParams, fromState, fromParams) {
+        if (toState.data && toState.data.requiresLogin && Authentication.user === '') {
+            event.preventDefault();
+            $state.go('authentication.signin', {}, {
+                notify: false
+            }).then(function() {
+                $rootScope.$broadcast('$stateChangeSuccess', 'authentication.signin', {}, toState, toParams);
+            });
+        }
+    });
+});
+
 //Then define the init function for starting up the application
 angular.element(document).ready(function() {
 	//Fixing facebook bug with redirect

modules/users/client/config/users.client.routes.js

@@ -8,7 +8,10 @@ angular.module('users').config(['$stateProvider',
 			state('settings', {
 				abstract: true,
 				url: '/settings',
-				templateUrl: 'modules/users/views/settings/settings.client.view.html'
+				templateUrl: 'modules/users/views/settings/settings.client.view.html',
+				data: {
+					requiresLogin: true
+				}
 			}).
 			state('settings.profile', {
 				url: '/profile',

modules/users/client/controllers/settings/settings.client.controller.js

@@ -3,8 +3,5 @@
 angular.module('users').controller('SettingsController', ['$scope', '$location', 'Authentication',
 	function($scope, $location, Authentication) {
 		$scope.user = Authentication.user;
-
-		// If user is not signed in then redirect back home
-		if (!$scope.user) $location.path('/');
 	}
 ]);