DelayCacheTagsInvalidationHooks.php

<?php

declare (strict_types=1);
namespace Drupal\delay_cache_tags_invalidation\Hook;

use Drupal\user\UserInterface;
use Drupal\user\Entity\User;
use Drupal\Core\Cache\Cache;
use Drupal\entity_test\Entity\EntityTest;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for delay_cache_tags_invalidation.
 */
class DelayCacheTagsInvalidationHooks {
    
    /**
     * Implements hook_ENTITY_TYPE_insert().
     */
    public function entityTestInsert(EntityTest $entity) : void {
        if (\Drupal::state()->get('delay_cache_tags_invalidation_exception')) {
            throw new \Exception('Abort entity save to trigger transaction rollback.');
        }
        // Read the pre-transaction cache writes.
        // @see \Drupal\KernelTests\Core\Cache\EndOfTransactionQueriesTest::testEntitySave()
        \Drupal::state()->set('delay_cache_tags_invalidation_entity_test_insert' . '__pre-transaction_foobar', \Drupal::cache()->get('test_cache_pre-transaction_foobar'));
        \Drupal::state()->set('delay_cache_tags_invalidation_entity_test_insert' . '__pre-transaction_entity_test_list', \Drupal::cache()->get('test_cache_pre-transaction_entity_test_list'));
        // Write during the transaction.
        \Drupal::cache()->set('delay_cache_tags_invalidation_entity_test_insert' . '__during_transaction_foobar', 'something', Cache::PERMANENT, [
            'foobar',
        ]);
        \Drupal::cache()->set('delay_cache_tags_invalidation_entity_test_insert' . '__during_transaction_entity_test_list', 'something', Cache::PERMANENT, [
            'entity_test_list',
        ]);
        // Trigger a nested entity save and hence a nested transaction.
        User::create([
            'name' => 'john doe',
            'status' => 1,
        ])->save();
    }
    
    /**
     * Implements hook_ENTITY_TYPE_insert().
     */
    public function userInsert(UserInterface $entity) : void {
        if ($entity->getAccountName() === 'john doe') {
            // Read the in-transaction cache writes.
            // @see  delay_cache_tags_invalidation_entity_test_insert()
            \Drupal::state()->set('delay_cache_tags_invalidation_user_insert' . '__during_transaction_foobar', \Drupal::cache()->get('delay_cache_tags_invalidation_entity_test_insert__during_transaction_foobar'));
            \Drupal::state()->set('delay_cache_tags_invalidation_user_insert' . '__during_transaction_entity_test_list', \Drupal::cache()->get('delay_cache_tags_invalidation_entity_test_insert__during_transaction_entity_test_list'));
        }
    }

}