/**
* Get the revision owner for an ContentEntity.
*
* Need because 2 possible interfaces support this.
*
* @param \Drupal\Core\Entity\ContentEntityInterface $entity
*
* @return \Drupal\user\UserInterface|NULL
*/
protected function getRevisionOwner(ContentEntityInterface $entity)
{
if ($entity instanceof NodeInterface) {
return $entity->getRevisionAuthor();
} elseif ($this->implementsInterface($entity, ['Drupal\\entity\\Revision\\EntityRevisionLogInterface'])) {
/** @var \Drupal\entity\Revision\EntityRevisionLogInterface $entity */
return $entity->getRevisionUser();
}
return NULL;
}