Issue #1987894 by ParisLiakos, vijaycs85: Convert user_logout() to a new style controller.

core/modules/user/lib/Drupal/user/Access/LoginStatusCheck.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\user\Access\LoginStatusCheck.
+ */
+
+namespace Drupal\user\Access;
+
+use Drupal\Core\Access\AccessCheckInterface;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Determines access to routes based on login status of current user.
+ */
+class LoginStatusCheck implements AccessCheckInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function applies(Route $route) {
+    return array_key_exists('_user_is_logged_in', $route->getRequirements());
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access(Route $route, Request $request) {
+    return (bool) $GLOBALS['user']->uid;
+  }
+
+}

core/modules/user/lib/Drupal/user/UserAutocompleteController.php → core/modules/user/lib/Drupal/user/Controller/UserAutocompleteController.php

@@ -2,15 +2,16 @@
 
 /**
  * @file
- * Contains \Drupal\user\UserAutocompleteController.
+ * Contains \Drupal\user\Controller\UserAutocompleteController.
  */
-namespace Drupal\user;
+namespace Drupal\user\Controller;
 
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 use Drupal\Core\ControllerInterface;
+use Drupal\user\UserAutocomplete;
 
 /**
  * Controller routines for taxonomy user routes.
@@ -79,4 +80,3 @@ public function autocompleteUserAnonymous(Request $request) {
   }
 
 }
-

core/modules/user/lib/Drupal/user/Controller/UserController.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\user\Controller\UserController.
+ */
+
+namespace Drupal\user\Controller;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Drupal\Core\ControllerInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+
+/**
+ * Controller routines for user routes.
+ */
+class UserController implements ControllerInterface {
+
+  /**
+   * The module handler service.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * Constructs an UserController object.
+   *
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler service.
+   */
+  public function __construct(ModuleHandlerInterface $module_handler) {
+    $this->moduleHandler = $module_handler;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('module_handler')
+    );
+  }
+
+  /**
+   * Logs the current user out.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   *   A redirection to home page.
+   */
+  public function logout(Request $request) {
+    global $user;
+
+    watchdog('user', 'Session closed for %name.', array('%name' => $user->name));
+    $this->moduleHandler->invokeAll('user_logout', array($user));
+    // Destroy the current session, and reset $user to the anonymous user.
+    session_destroy();
+    // @todo Remove the destination check once drupal.org/node/1668866 is in.
+    $url = $request->query->get('destination') ?: '<front>';
+    return new RedirectResponse(url($url, array('absolute' => TRUE)));
+  }
+
+}

core/modules/user/user.module

@@ -906,11 +906,9 @@ function user_menu() {
 
   $items['user/logout'] = array(
     'title' => 'Log out',
-    'access callback' => 'user_is_logged_in',
-    'page callback' => 'user_logout',
+    'route_name' => 'user_logout',
     'weight' => 10,
     'menu_name' => 'account',
-    'file' => 'user.pages.inc',
   );
 
   // User listing pages.

core/modules/user/user.pages.inc

@@ -164,7 +164,7 @@ function user_pass_reset($form, &$form_state, $uid, $timestamp, $hashed_pass, $a
 }
 
 /**
- * Menu callback; logs the current user out, and redirects to the home page.
+ * Logs the current user out, and redirects to the home page.
  */
 function user_logout() {
   global $user;

core/modules/user/user.routing.yml

@@ -5,17 +5,24 @@ user_register:
   requirements:
     _access_user_register: 'TRUE'
 
+user_logout:
+  pattern: '/user/logout'
+  defaults:
+    _controller: '\Drupal\user\Controller\UserController::logout'
+  requirements:
+    _user_is_logged_in: 'TRUE'
+
 user_autocomplete:
   pattern: '/user/autocomplete'
   defaults:
-    _controller: '\Drupal\user\UserAutocompleteController::autocompleteUser'
+    _controller: '\Drupal\user\Controller\UserAutocompleteController::autocompleteUser'
   requirements:
     _permission: 'access user profiles'
 
 user_autocomplete_anonymous:
   pattern: '/user/autocomplete/anonymous'
   defaults:
-    _controller: '\Drupal\user\UserAutocompleteController::autocompleteUserAnonymous'
+    _controller: '\Drupal\user\Controller\UserAutocompleteController::autocompleteUserAnonymous'
   requirements:
     _permission: 'access user profiles'
 

core/modules/user/user.services.yml

@@ -11,6 +11,10 @@ services:
     class: Drupal\user\Access\RoleAccessCheck
     tags:
       - { name: access_check }
+  access_check.user.login_status:
+    class: Drupal\user\Access\LoginStatusCheck
+    tags:
+      - { name: access_check }
   user.data:
     class: Drupal\user\UserData
     arguments: ['@database']