public function ParentEntityRevisionUpdater::moveChildren in Entity Reference Hierarchy 8.2

Same name and namespace in other branches

1. 3.x src/Storage/ParentEntityRevisionUpdater.php \Drupal\entity_hierarchy\Storage\ParentEntityRevisionUpdater::moveChildren()

Move children from old revision to new revision.

Parameters

\Drupal\Core\Entity\ContentEntityInterface $oldRevision: Old revision.

\Drupal\Core\Entity\ContentEntityInterface $newRevision: New revision.

File

src/Storage/ParentEntityRevisionUpdater.php, line 20

Class

ParentEntityRevisionUpdater

Defines a class for handling a parent entity is updated to a new revision.

Namespace

Drupal\entity_hierarchy\Storage

Code

public function moveChildren(ContentEntityInterface $oldRevision, ContentEntityInterface $newRevision) {
  if (!$newRevision
    ->isDefaultRevision()) {

    // We don't move children to a non-default revision.
    return;
  }
  if ($newRevision
    ->getRevisionId() == $oldRevision
    ->getRevisionId()) {

    // We don't move anything if the revision isn't changing.
    return;
  }
  if (!($fields = $this->parentCandidate
    ->getCandidateFields($newRevision))) {

    // There are no fields that could point to this entity.
    return;
  }
  $oldNodeKey = $this->nodeKeyFactory
    ->fromEntity($oldRevision);
  $newNodeKey = $this->nodeKeyFactory
    ->fromEntity($newRevision);
  foreach ($fields as $field_name) {
    $this
      ->lockTree($field_name, $newRevision
      ->getEntityTypeId());

    /** @var \Pnx\NestedSet\NestedSetInterface $storage */
    $storage = $this->nestedSetStorageFactory
      ->get($field_name, $newRevision
      ->getEntityTypeId());
    if (!($newParent = $storage
      ->getNode($newNodeKey))) {
      $newParent = $storage
        ->addRootNode($newNodeKey);
    }
    if ($storage
      ->findChildren($oldNodeKey)) {
      $storage
        ->adoptChildren($storage
        ->getNode($oldNodeKey), $newParent);
    }
    $this
      ->releaseLock($field_name, $newRevision
      ->getEntityTypeId());
  }
}