function EntityChangedConstraintValidator::validate

File

core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraintValidator.php, line 16

Class

EntityChangedConstraintValidator

Validates the EntityChanged constraint.

Namespace

Code

public function validate($entity, Constraint $constraint) {
  if (isset($entity)) {
    /** @var \Drupal\Core\Entity\EntityInterface $entity */
    if (!$entity->isNew()) {
      $saved_entity = \Drupal::entityTypeManager()->getStorage($entity->getEntityTypeId())
        ->loadUnchanged($entity->id());
      // Ensure that all the entity translations are the same as or newer
      // than their current version in the storage in order to avoid
      // reverting other changes. In fact the entity object that is being
      // saved might contain an older entity translation when different
      // translations are being concurrently edited.
      if ($saved_entity) {
        $common_translation_languages = array_intersect_key($entity->getTranslationLanguages(), $saved_entity->getTranslationLanguages());
        foreach (array_keys($common_translation_languages) as $langcode) {
          // Merely comparing the latest changed timestamps across all
          // translations is not sufficient since other translations may have
          // been edited and saved in the meanwhile. Therefore, compare the
          // changed timestamps of each entity translation individually.
          if ($saved_entity->getTranslation($langcode)
            ->getChangedTime() > $entity->getTranslation($langcode)
            ->getChangedTime()) {
            $this->context
              ->addViolation($constraint->message);
            break;

          }
        }
      }
    }
  }
}