Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\user\Theme;
Chris@0: 
Chris@0: use Drupal\Core\Config\ConfigFactoryInterface;
Chris@0: use Drupal\Core\Entity\EntityManagerInterface;
Chris@0: use Drupal\Core\Routing\AdminContext;
Chris@0: use Drupal\Core\Routing\RouteMatchInterface;
Chris@0: use Drupal\Core\Session\AccountInterface;
Chris@0: use Drupal\Core\Theme\ThemeNegotiatorInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Sets the active theme on admin pages.
Chris@0:  */
Chris@0: class AdminNegotiator implements ThemeNegotiatorInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The current user.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Session\AccountInterface
Chris@0:    */
Chris@0:   protected $user;
Chris@0: 
Chris@0:   /**
Chris@0:    * The config factory.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Config\ConfigFactoryInterface
Chris@0:    */
Chris@0:   protected $configFactory;
Chris@0: 
Chris@0:   /**
Chris@0:    * The entity manager.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Entity\EntityManagerInterface
Chris@0:    */
Chris@0:   protected $entityManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * The route admin context to determine whether a route is an admin one.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Routing\AdminContext
Chris@0:    */
Chris@0:   protected $adminContext;
Chris@0: 
Chris@0:   /**
Chris@0:    * Creates a new AdminNegotiator instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Session\AccountInterface $user
Chris@0:    *   The current user.
Chris@0:    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
Chris@0:    *   The config factory.
Chris@0:    * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
Chris@0:    *   The entity manager.
Chris@0:    * @param \Drupal\Core\Routing\AdminContext $admin_context
Chris@0:    *   The route admin context to determine whether the route is an admin one.
Chris@0:    */
Chris@0:   public function __construct(AccountInterface $user, ConfigFactoryInterface $config_factory, EntityManagerInterface $entity_manager, AdminContext $admin_context) {
Chris@0:     $this->user = $user;
Chris@0:     $this->configFactory = $config_factory;
Chris@0:     $this->entityManager = $entity_manager;
Chris@0:     $this->adminContext = $admin_context;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function applies(RouteMatchInterface $route_match) {
Chris@0:     return ($this->entityManager->hasHandler('user_role', 'storage') && $this->user->hasPermission('view the administration theme') && $this->adminContext->isAdminRoute($route_match->getRouteObject()));
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function determineActiveTheme(RouteMatchInterface $route_match) {
Chris@0:     return $this->configFactory->get('system.theme')->get('admin');
Chris@0:   }
Chris@0: 
Chris@0: }