Version 1

[yaffs-website] / web / core / modules / forum / src / Breadcrumb / ForumListingBreadcrumbBuilder.php

diff --git a/web/core/modules/forum/src/Breadcrumb/ForumListingBreadcrumbBuilder.php b/web/core/modules/forum/src/Breadcrumb/ForumListingBreadcrumbBuilder.php
new file mode 100644 (file)
index 0000000..93e5dd5
--- /dev/null
+++ b/web/core/modules/forum/src/Breadcrumb/ForumListingBreadcrumbBuilder.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Drupal\forum\Breadcrumb;
+
+use Drupal\Core\Link;
+use Drupal\Core\Routing\RouteMatchInterface;
+
+/**
+ * Provides a breadcrumb builder base class for forum listing pages.
+ */
+class ForumListingBreadcrumbBuilder extends ForumBreadcrumbBuilderBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function applies(RouteMatchInterface $route_match) {
+    return $route_match->getRouteName() == 'forum.page' && $route_match->getParameter('taxonomy_term');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  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 = $this->forumManager->getParents($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;
+  }
+
+}