class MaintenanceModeSubscriber in Drupal 8

Maintenance mode subscriber to log out users.

Hierarchy

• class \Drupal\user\EventSubscriber\MaintenanceModeSubscriber implements \Symfony\Component\EventDispatcher\EventSubscriberInterface

1 string reference to 'MaintenanceModeSubscriber'

user.services.yml in core/modules/user/user.services.yml

core/modules/user/user.services.yml

1 service uses MaintenanceModeSubscriber

user_maintenance_mode_subscriber in core/modules/user/user.services.yml

Drupal\user\EventSubscriber\MaintenanceModeSubscriber

File

core/modules/user/src/EventSubscriber/MaintenanceModeSubscriber.php, line 17

Namespace

Drupal\user\EventSubscriber

class MaintenanceModeSubscriber implements EventSubscriberInterface {

  /**
   * The maintenance mode.
   *
   * @var \Drupal\Core\Site\MaintenanceMode
   */
  protected $maintenanceMode;

  /**
   * The current account.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $account;

  /**
   * Constructs a new MaintenanceModeSubscriber.
   *
   * @param \Drupal\Core\Site\MaintenanceModeInterface $maintenance_mode
   *   The maintenance mode.
   * @param \Drupal\Core\Session\AccountInterface $account
   *   The current user.
   */
  public function __construct(MaintenanceModeInterface $maintenance_mode, AccountInterface $account) {
    $this->maintenanceMode = $maintenance_mode;
    $this->account = $account;
  }

  /**
   * Logout users if site is in maintenance mode.
   *
   * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
   *   The event to process.
   */
  public function onKernelRequestMaintenance(GetResponseEvent $event) {
    $request = $event
      ->getRequest();
    $route_match = RouteMatch::createFromRequest($request);
    if ($this->maintenanceMode
      ->applies($route_match)) {

      // If the site is offline, log out unprivileged users.
      if ($this->account
        ->isAuthenticated() && !$this->maintenanceMode
        ->exempt($this->account)) {
        user_logout();

        // Redirect to homepage.
        $event
          ->setResponse(new RedirectResponse(Url::fromRoute('<front>')
          ->toString()));
      }
    }
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events[KernelEvents::REQUEST][] = [
      'onKernelRequestMaintenance',
      31,
    ];
    return $events;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
MaintenanceModeSubscriber::$account	protected	property	The current account.
MaintenanceModeSubscriber::$maintenanceMode	protected	property	The maintenance mode.
MaintenanceModeSubscriber::getSubscribedEvents	public static	function	Returns an array of event names this subscriber wants to listen to.
MaintenanceModeSubscriber::onKernelRequestMaintenance	public	function	Logout users if site is in maintenance mode.
MaintenanceModeSubscriber::__construct	public	function	Constructs a new MaintenanceModeSubscriber.