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1<?php
2
3declare(strict_types=1);
4
5namespace Drupal\display_builder_entity_view\EventSubscriber;
6
7use Drupal\Core\Entity\Display\EntityDisplayInterface;
8use Drupal\Core\Entity\EntityTypeManagerInterface;
9use Drupal\Core\Plugin\Context\ContextInterface;
10use Drupal\display_builder\DisplayBuildablePluginManager;
11use Drupal\display_builder\Event\DisplayBuilderEvent;
12use Drupal\display_builder\Event\DisplayBuilderEvents;
13use Drupal\display_builder_entity_view\Plugin\display_builder\Buildable\EntityView;
14use Drupal\display_builder_entity_view\Plugin\display_builder\Buildable\EntityViewOverride;
15use Symfony\Component\EventDispatcher\EventSubscriberInterface;
16
17/**
18 * The event subscriber for display builder islands.
19 */
20class DisplayBuilderSubscriber implements EventSubscriberInterface {
21
22  public function __construct(
23    protected EntityTypeManagerInterface $entityTypeManager,
24    protected DisplayBuildablePluginManager $displayBuildableManager,
25  ) {}
26
27  /**
28   * {@inheritdoc}
29   */
30  public static function getSubscribedEvents(): array {
31    return [
32      DisplayBuilderEvents::ON_SAVE => 'onSave',
33    ];
34  }
35
36  /**
37   * Event handler for when a display builder is saved.
38   *
39   * @param \Drupal\display_builder\Event\DisplayBuilderEvent $event
40   *   The event object.
41   */
42  public function onSave(DisplayBuilderEvent $event): void {
43    $builder_id = $event->getBuilderId();
44    /** @var \Drupal\display_builder\InstanceInterface $instance */
45    $instance = $this->entityTypeManager->getStorage('display_builder_instance')->load($builder_id);
46    $contexts = $instance->getContexts();
47
48    // Entity view display overrides.
49    if ($params = EntityViewOverride::checkInstanceId($builder_id)) {
50      /** @var \Drupal\Core\Entity\FieldableEntityInterface $entity */
51      $entity = $this->entityTypeManager->getStorage($params['entity_type_id'])
52        ->load($params['entity_id']);
53      /** @var \Drupal\Core\Entity\FieldableEntityInterface $override */
54      $override = $entity->get($params['field_name']);
55
56      if ($override) {
57        /** @var \Drupal\display_builder\DisplayBuildableInterface $buildable */
58        $buildable = $this->displayBuildableManager->createInstance('entity_view_override', ['field' => $override]);
59        $buildable->saveSources();
60      }
61    }
62
63    // Entity view displays.
64    elseif (EntityView::checkInstanceId($builder_id)) {
65      if (!$instance->hasSaveContextsRequirement(EntityView::getContextRequirement(), $contexts)) {
66        return;
67      }
68      // Entity view display parameters are also in route match.
69      $display = $this->getEntityViewDisplayEntity($contexts['entity'], $contexts['view_mode']);
70
71      if ($display) {
72        /** @var \Drupal\display_builder\DisplayBuildableInterface $buildable */
73        $buildable = $this->displayBuildableManager->createInstance('entity_view', ['entity' => $display]);
74        $buildable->saveSources();
75      }
76    }
77  }
78
79  /**
80   * Get entity view display entity.
81   *
82   * @param \Drupal\Core\Plugin\Context\ContextInterface $entity_context
83   *   The entity context.
84   * @param \Drupal\Core\Plugin\Context\ContextInterface $view_mode_context
85   *   The view mode context.
86   *
87   * @return \Drupal\Core\Entity\Display\EntityDisplayInterface|null
88   *   The entity view display entity or NULL if not found.
89   */
90  protected function getEntityViewDisplayEntity(ContextInterface $entity_context, ContextInterface $view_mode_context): ?EntityDisplayInterface {
91    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
92    $entity = $entity_context->getContextValue();
93    $entity_type_id = $entity->getEntityTypeId();
94    $bundle = $entity->bundle();
95    $view_mode = $view_mode_context->getContextValue();
96    $display_id = "{$entity_type_id}.{$bundle}.{$view_mode}";
97
98    /** @var \Drupal\Core\Entity\Display\EntityDisplayInterface|null $display */
99    $display = $this->entityTypeManager->getStorage('entity_view_display')
100      ->load($display_id);
101
102    return $display;
103  }
104
105}