public function ChildEntityWarningBuilder::buildChildEntityWarnings in Entity Reference Hierarchy 8.2

Same name and namespace in other branches

1. 3.x src/Information/ChildEntityWarningBuilder.php \Drupal\entity_hierarchy\Information\ChildEntityWarningBuilder::buildChildEntityWarnings()

Gets warning about child entities before deleting a parent.

Parameters

\Drupal\Core\Entity\ContentEntityInterface $parent: Parent to be deleted.

Return value

\Drupal\entity_hierarchy\Information\ChildEntityWarning[] Array of warning value objects.

File

src/Information/ChildEntityWarningBuilder.php, line 86

Class

ChildEntityWarningBuilder

Defines a class for building a list of child entity warnings.

Namespace

Drupal\entity_hierarchy\Information

Code

public function buildChildEntityWarnings(ContentEntityInterface $parent) {
  $return = [];
  if ($fields = $this->parentCandidate
    ->getCandidateFields($parent)) {
    $cache = new CacheableMetadata();
    foreach ($fields as $field_name) {

      /** @var \PNX\NestedSet\NestedSetInterface $storage */
      $storage = $this->nestedSetStorageFactory
        ->get($field_name, $parent
        ->getEntityTypeId());
      $nodeKey = $this->nodeKeyFactory
        ->fromEntity($parent);
      $children = $storage
        ->findChildren($nodeKey);
      if ($parent_node = $storage
        ->findParent($nodeKey)) {
        $children[] = $parent_node;
      }
      $entities = $this->treeNodeMapper
        ->loadAndAccessCheckEntitysForTreeNodes($parent
        ->getEntityTypeId(), $children, $cache);
      $return[] = new ChildEntityWarning($entities, $cache, $parent_node);
    }
  }
  return $return;
}