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