function ForumListingBreadcrumbBuilder::build

Overrides ForumBreadcrumbBuilderBase::build

File

core/modules/forum/src/Breadcrumb/ForumListingBreadcrumbBuilder.php, line 23

Class

ForumListingBreadcrumbBuilder

Provides a breadcrumb builder base class for forum listing pages.

Namespace

Code

public function build(RouteMatchInterface $route_match) {
    $breadcrumb = parent::build($route_match);
    $breadcrumb->addCacheContexts([
        'route',
    ]);
    // Add all parent forums to breadcrumbs.
    
    /** @var \Drupal\taxonomy\TermInterface $term */
    $term = $route_match->getParameter('taxonomy_term');
    $term_id = $term->id();
    $breadcrumb->addCacheableDependency($term);
    $parents = $this->termStorage
        ->loadAllParents($term_id);
    if ($parents) {
        foreach (array_reverse($parents) as $parent) {
            if ($parent->id() != $term_id) {
                $breadcrumb->addCacheableDependency($parent);
                $breadcrumb->addLink(Link::createFromRoute($parent->label(), 'forum.page', [
                    'taxonomy_term' => $parent->id(),
                ]));
            }
        }
    }
    return $breadcrumb;
}