function CommentBreadcrumbBuilder::build

Overrides BreadcrumbBuilderInterface::build

File

core/modules/comment/src/CommentBreadcrumbBuilder.php, line 45

Class

CommentBreadcrumbBuilder

Class to define the comment breadcrumb builder.

Namespace

Code

public function build(RouteMatchInterface $route_match) {
    $breadcrumb = new Breadcrumb();
    $breadcrumb->addCacheContexts([
        'route',
    ]);
    $breadcrumb->addLink(Link::createFromRoute($this->t('Home'), '<front>'));
    $entity = $route_match->getParameter('entity');
    $breadcrumb->addLink(new Link($entity->label(), $entity->toUrl()));
    $breadcrumb->addCacheableDependency($entity);
    if (($pid = $route_match->getParameter('pid')) && ($comment = $this->storage
        ->load($pid))) {
        
        /** @var \Drupal\comment\CommentInterface $comment */
        $breadcrumb->addCacheableDependency($comment);
        // Display link to parent comment.
        // @todo Clean-up permalink in https://www.drupal.org/node/2198041
        $breadcrumb->addLink(new Link($comment->getSubject(), $comment->toUrl()));
    }
    return $breadcrumb;
}