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1<?php
2
3declare(strict_types=1);
4
5namespace Drupal\display_builder_page_layout\EventSubscriber;
6
7use Drupal\Core\Entity\EntityTypeManagerInterface;
8use Drupal\Core\Plugin\CachedDiscoveryClearerInterface;
9use Drupal\display_builder\Event\DisplayBuilderEvent;
10use Drupal\display_builder\Event\DisplayBuilderEvents;
11use Drupal\display_builder_page_layout\Entity\PageLayout;
12use Symfony\Component\EventDispatcher\EventSubscriberInterface;
13
14/**
15 * The event subscriber for display builder islands.
16 */
17class DisplayBuilderSubscriber implements EventSubscriberInterface {
18
19  public function __construct(
20    private CachedDiscoveryClearerInterface $pluginCacheClearer,
21    private EntityTypeManagerInterface $entityTypeManager,
22  ) {}
23
24  /**
25   * {@inheritdoc}
26   */
27  public static function getSubscribedEvents(): array {
28    return [
29      DisplayBuilderEvents::ON_SAVE => 'onSave',
30    ];
31  }
32
33  /**
34   * Event handler for when a display builder is saved.
35   *
36   * @param \Drupal\display_builder\Event\DisplayBuilderEvent $event
37   *   The event object.
38   */
39  public function onSave(DisplayBuilderEvent $event): void {
40    $builder_id = $event->getBuilderId();
41    $contexts = $event->getData();
42    $params = PageLayout::checkInstanceId($builder_id);
43
44    if (!$params) {
45      return;
46    }
47
48    // Context requirements is set to allow SourcePlugin when editing. We need
49    // a precedence when saving.
50    // @todo perhaps we need a third context.
51    /** @var \Drupal\display_builder\InstanceInterface $instance */
52    $instance = $this->entityTypeManager->getStorage('display_builder_instance')->load($builder_id);
53
54    if (!$instance->hasSaveContextsRequirement(PageLayout::getContextRequirement(), $contexts)) {
55      return;
56    }
57    $page_layout_id = $params['page_layout'] ?? NULL;
58
59    if (!$page_layout_id) {
60      // This must never happen because PageLayout::checkInstanceId() always
61      // return a page_layout key.
62      return;
63    }
64    /** @var \Drupal\display_builder_page_layout\PageLayoutInterface $page_layout */
65    $page_layout = $this->entityTypeManager->getStorage('page_layout')->load($page_layout_id);
66    $page_layout->saveSources();
67    // Clearing plugin cache seems enough to get the new layout.
68    // @todo It looks very costly. Check if it is still needed.
69    $this->pluginCacheClearer->clearCachedDefinitions();
70  }
71
72}