Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\EventSubscriber;
Chris@0: 
Chris@0: use Drupal\Core\Path\AliasManagerInterface;
Chris@0: use Drupal\Core\Path\CurrentPathStack;
Chris@0: use Symfony\Component\HttpKernel\KernelEvents;
Chris@0: use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
Chris@0: use Symfony\Component\HttpKernel\Event\PostResponseEvent;
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides a path subscriber that converts path aliases.
Chris@0:  */
Chris@0: class PathSubscriber implements EventSubscriberInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The alias manager that caches alias lookups based on the request.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Path\AliasManagerInterface
Chris@0:    */
Chris@0:   protected $aliasManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * The current path.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Path\CurrentPathStack
Chris@0:    */
Chris@0:   protected $currentPath;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new PathSubscriber instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Path\AliasManagerInterface $alias_manager
Chris@0:    *   The alias manager.
Chris@0:    * @param \Drupal\Core\Path\CurrentPathStack $current_path
Chris@0:    *   The current path.
Chris@0:    */
Chris@0:   public function __construct(AliasManagerInterface $alias_manager, CurrentPathStack $current_path) {
Chris@0:     $this->aliasManager = $alias_manager;
Chris@0:     $this->currentPath = $current_path;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Sets the cache key on the alias manager cache decorator.
Chris@0:    *
Chris@0:    * KernelEvents::CONTROLLER is used in order to be executed after routing.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\HttpKernel\Event\FilterControllerEvent $event
Chris@0:    *   The Event to process.
Chris@0:    */
Chris@0:   public function onKernelController(FilterControllerEvent $event) {
Chris@0:     // Set the cache key on the alias manager cache decorator.
Chris@18:     if ($event->isMasterRequest()) {
Chris@0:       $this->aliasManager->setCacheKey(rtrim($this->currentPath->getPath($event->getRequest()), '/'));
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Ensures system paths for the request get cached.
Chris@0:    */
Chris@0:   public function onKernelTerminate(PostResponseEvent $event) {
Chris@0:     $this->aliasManager->writeCache();
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Registers the methods in this class that should be listeners.
Chris@0:    *
Chris@0:    * @return array
Chris@0:    *   An array of event listener definitions.
Chris@0:    */
Chris@0:   public static function getSubscribedEvents() {
Chris@0:     $events[KernelEvents::CONTROLLER][] = ['onKernelController', 200];
Chris@0:     $events[KernelEvents::TERMINATE][] = ['onKernelTerminate', 200];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }