Merge pull request #627 from itk-dev/hotfix/invalidate-on-flag-change

Added cache invalidation on flag/unflag

Author: martinyde

CHANGELOG.md

@@ -6,6 +6,11 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+## [4.14.6] - 2026-01-29
+
+* [PR-626](https://github.com/itk-dev/deltag.aarhus.dk/pull/623)
+  Invalidate node cache when node is flagged.
+
 ## [4.14.5] - 2026-01-29
 
 * [PR-623](https://github.com/itk-dev/deltag.aarhus.dk/pull/623)

web/modules/custom/hoeringsportal_dialogue/hoeringsportal_dialogue.services.yml

@@ -14,3 +14,7 @@ services:
   Drupal\hoeringsportal_dialogue\EventSubscriber\AnonymousEditSubscriber:
     tags:
       - { name: event_subscriber }
+
+  Drupal\hoeringsportal_dialogue\EventSubscriber\FlagCacheInvalidationSubscriber:
+    tags:
+      - { name: event_subscriber }

web/modules/custom/hoeringsportal_dialogue/src/EventSubscriber/FlagCacheInvalidationSubscriber.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\hoeringsportal_dialogue\EventSubscriber;
+
+use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
+use Drupal\flag\Event\FlaggingEvent;
+use Drupal\flag\Event\UnflaggingEvent;
+use Drupal\node\NodeInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Invalidates node cache when flagged or unflagged.
+ */
+final readonly class FlagCacheInvalidationSubscriber implements EventSubscriberInterface {
+
+  public function __construct(
+    private CacheTagsInvalidatorInterface $cacheTagsInvalidator,
+  ) {}
+
+  /**
+   * Invalidates the cache for the flagged/unflagged node.
+   */
+  public function onFlagChange(FlaggingEvent|UnflaggingEvent $event): void {
+    if ($event instanceof FlaggingEvent) {
+      $flagging = $event->getFlagging();
+      $entity = $flagging->getFlaggable();
+    }
+    else {
+      $flaggings = $event->getFlaggings();
+      $flagging = reset($flaggings);
+      $entity = $flagging->getFlaggable();
+    }
+
+    if ($entity instanceof NodeInterface) {
+      $this->cacheTagsInvalidator->invalidateTags($entity->getCacheTags());
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents(): array {
+    return [
+      'flag.entity_flagged' => ['onFlagChange'],
+      'flag.entity_unflagged' => ['onFlagChange'],
+    ];
+  }
+
+}