Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\comment;
Chris@0: 
Chris@0: use Drupal\Core\Breadcrumb\BreadcrumbBuilderInterface;
Chris@0: use Drupal\Core\Breadcrumb\Breadcrumb;
Chris@18: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@0: use Drupal\Core\Link;
Chris@0: use Drupal\Core\Routing\RouteMatchInterface;
Chris@0: use Drupal\Core\StringTranslation\StringTranslationTrait;
Chris@0: 
Chris@0: /**
Chris@0:  * Class to define the comment breadcrumb builder.
Chris@0:  */
Chris@0: class CommentBreadcrumbBuilder implements BreadcrumbBuilderInterface {
Chris@0:   use StringTranslationTrait;
Chris@0: 
Chris@0:   /**
Chris@0:    * The comment storage.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Entity\EntityStorageInterface
Chris@0:    */
Chris@0:   protected $storage;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs the CommentBreadcrumbBuilder.
Chris@0:    *
Chris@18:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@18:    *   The entity type manager.
Chris@0:    */
Chris@18:   public function __construct(EntityTypeManagerInterface $entity_type_manager) {
Chris@18:     $this->storage = $entity_type_manager->getStorage('comment');
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function applies(RouteMatchInterface $route_match) {
Chris@0:     return $route_match->getRouteName() == 'comment.reply' && $route_match->getParameter('entity');
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function build(RouteMatchInterface $route_match) {
Chris@0:     $breadcrumb = new Breadcrumb();
Chris@0:     $breadcrumb->addCacheContexts(['route']);
Chris@0:     $breadcrumb->addLink(Link::createFromRoute($this->t('Home'), '<front>'));
Chris@0: 
Chris@0:     $entity = $route_match->getParameter('entity');
Chris@18:     $breadcrumb->addLink(new Link($entity->label(), $entity->toUrl()));
Chris@0:     $breadcrumb->addCacheableDependency($entity);
Chris@0: 
Chris@0:     if (($pid = $route_match->getParameter('pid')) && ($comment = $this->storage->load($pid))) {
Chris@0:       /** @var \Drupal\comment\CommentInterface $comment */
Chris@0:       $breadcrumb->addCacheableDependency($comment);
Chris@0:       // Display link to parent comment.
Chris@0:       // @todo Clean-up permalink in https://www.drupal.org/node/2198041
Chris@18:       $breadcrumb->addLink(new Link($comment->getSubject(), $comment->toUrl()));
Chris@0:     }
Chris@0: 
Chris@0:     return $breadcrumb;
Chris@0:   }
Chris@0: 
Chris@0: }