Add a view display extender for the localgov_page_header for the lede

config/schema/localgov_core.views.schema.yml

@@ -0,0 +1,9 @@
+views.display_extender.localgov_page_header_display_extender:
+  type: views_display_extender
+  mapping:
+    lede:
+      type: text
+      label: 'Lede'
+    tokenize:
+      type: boolean
+      label: 'Should replacement tokens be used from the first row'

src/Event/PageHeaderDisplayEvent.php

@@ -3,6 +3,8 @@
 namespace Drupal\localgov_core\Event;
 
 use Drupal\Component\EventDispatcher\Event;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\views\ViewExecutable;
 
 /**
  * Event that is fired when displaying the page header.
@@ -18,6 +20,13 @@ class PageHeaderDisplayEvent extends Event {
    */
   protected $entity = NULL;
 
+  /**
+   * View executable associated with the current route.
+   *
+   * @var \Drupal\views\ViewExecutable|null
+   */
+  protected $view = NULL;
+
   /**
    * The page lede override.
    *
@@ -56,7 +65,10 @@ class PageHeaderDisplayEvent extends Event {
   /**
    * {@inheritdoc}
    */
-  public function __construct($entity) {
+  public function __construct($entity = NULL) {
+    // @todo remove the $entity paramater or deprecate it.
+    // Since we should use the setters and getters.
+    // Or we can mark this class as internal?
     $this->entity = $entity;
   }
 
@@ -66,10 +78,40 @@ public function __construct($entity) {
    * @return \Drupal\Core\Entity\EntityInterface|null
    *   The entity.
    */
-  public function getEntity() {
+  public function getEntity() : ?EntityInterface {
     return $this->entity;
   }
 
+  /**
+   * Entity setter.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity.
+   */
+  public function setEntity(EntityInterface $entity) : void {
+    $this->entity = $entity;
+  }
+
+  /**
+   * View getter.
+   *
+   * @return \Drupal\views\ViewExecutable|null
+   *   The view.
+   */
+  public function getView() : ?ViewExecutable {
+    return $this->view;
+  }
+
+  /**
+   * View setter.
+   *
+   * @param \Drupal\views\ViewExecutable $view
+   *   The view.
+   */
+  public function setView(ViewExecutable $view) {
+    $this->view = $view;
+  }
+
   /**
    * Lede getter.
    *

src/Plugin/Block/PageHeaderBlock.php

@@ -14,6 +14,8 @@
 use Drupal\localgov_core\Event\PageHeaderDisplayEvent;
 use Drupal\node\Entity\Node;
 use Drupal\taxonomy\Entity\Term;
+use Drupal\views\ViewExecutable;
+use Drupal\views\Views;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\RequestStack;
 
@@ -62,6 +64,13 @@ class PageHeaderBlock extends BlockBase implements ContainerFactoryPluginInterfa
    */
   protected $entity = NULL;
 
+  /**
+   * View executable associated with the current route.
+   *
+   * @var \Drupal\views\ViewExecutable|null
+   */
+  protected $view = NULL;
+
   /**
    * The page title override.
    *
@@ -130,6 +139,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
     $route = $this->currentRouteMatch->getRouteObject();
     if (!is_null($route)) {
       $parameters = $route->getOption('parameters');
+      $defaults = $route->getDefaults();
       if (!is_null($parameters)) {
         foreach ($parameters as $name => $options) {
           if (!isset($options['type'])) {
@@ -152,10 +162,31 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
           }
         }
       }
+
+      // If this is a view path, set the view instead.
+      if (isset($defaults['view_id']) && isset($defaults['display_id'])) {
+        $view = Views::getView($defaults['view_id']);
+        if ($view) {
+          $view->setDisplay($defaults['display_id']);
+          $this->view = $view;
+        }
+      }
     }
 
     // Dispatch event to allow modules to alter block content.
-    $event = new PageHeaderDisplayEvent($this->entity);
+    $event = new PageHeaderDisplayEvent();
+
+    // If an entity is set, pass to the event.
+    if ($this->entity instanceof EntityInterface) {
+      $event->setEntity($this->entity);
+    }
+
+    // If a view is set, pass to the event.
+    if ($this->view instanceof ViewExecutable) {
+      $event->setView($this->view);
+    }
+
+    // Dispatch event.
     $this->eventDispatcher->dispatch($event, PageHeaderDisplayEvent::EVENT_NAME);
 
     // Set the title, lede, visibility and cache tags.
@@ -164,7 +195,8 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
     $this->lede = is_null($event->getLede()) ? $this->getLede() : $event->getLede();
     $this->visible = $event->getVisibility();
     $entityCacheTags = is_null($this->entity) ? [] : $this->entity->getCacheTags();
-    $this->cacheTags = is_null($event->getCacheTags()) ? $entityCacheTags : $event->getCacheTags();
+    $viewCacheTags = is_null($this->view) ? [] : $this->view->getCacheTags();
+    $this->cacheTags = is_null($event->getCacheTags()) ? array_merge($entityCacheTags, $viewCacheTags) : $event->getCacheTags();
   }
 
   /**
@@ -224,6 +256,20 @@ protected function getLede() {
       ];
     }
 
+    // Return view custom summary.
+    if ($this->view instanceof ViewExecutable) {
+      $extender = $this->view->getDisplay()->getExtenders()['localgov_page_header_display_extender'] ?? NULL;
+
+      // Need to render view to apply tokens.
+      $this->view->render();
+      $lede = $extender->getLede();
+      return [
+        '#type' => 'html_tag',
+        '#tag' => 'p',
+        '#value' => $lede,
+      ];
+    }
+
     return NULL;
   }