public function ValidHierarchyReferenceConstraintValidator::validate in Entity Reference Hierarchy 3.x

Same name and namespace in other branches

1. 8.2 src/Plugin/Validation/Constraint/ValidHierarchyReferenceConstraintValidator.php \Drupal\entity_hierarchy\Plugin\Validation\Constraint\ValidHierarchyReferenceConstraintValidator::validate()

File

src/Plugin/Validation/Constraint/ValidHierarchyReferenceConstraintValidator.php, line 70

Class

ValidHierarchyReferenceConstraintValidator

Checks if referenced entities are valid.

Namespace

Drupal\entity_hierarchy\Plugin\Validation\Constraint

Code

public function validate($value, Constraint $constraint) {

  /** @var \Drupal\Core\Field\FieldItemListInterface $value */

  /** @var ValidHierarchyReferenceConstraint $constraint */
  if (!isset($value)) {
    return;
  }

  // Collect new entities and IDs of existing entities across the field items.
  $new_entities = [];
  $target_ids = [];
  if (!$value
    ->getEntity()) {

    // Can't validate if we don't have access to host entity.
    return;
  }
  foreach ($value as $delta => $item) {
    $target_id = $item->target_id;

    // We don't use a regular NotNull constraint for the target_id property as
    // NULL is allowed if the entity property contains an unsaved entity.
    // @see \Drupal\Core\TypedData\DataReferenceTargetDefinition::getConstraints()
    if (!$item
      ->isEmpty() && $target_id === NULL) {
      if (!$item->entity
        ->isNew()) {
        $this->context
          ->buildViolation($constraint->nullMessage)
          ->atPath((string) $delta)
          ->addViolation();
        return;
      }
      $new_entities[$delta] = $item->entity;
    }

    // '0' or NULL are considered valid empty references.
    if (!empty($target_id)) {
      $target_ids[$delta] = $target_id;
    }
  }

  // Early opt-out if nothing to validate.
  if (!$new_entities && !$target_ids) {
    return;
  }
  $this_entity = $value
    ->getEntity();
  $thisNode = $this->keyFactory
    ->fromEntity($this_entity);
  $target_type = $this_entity
    ->getEntityTypeId();

  /** @var \PNX\NestedSet\Storage\DbalNestedSet $storage */
  $storage = $this->nestedSetStorageFactory
    ->get($value
    ->getFieldDefinition()
    ->getFieldStorageDefinition()
    ->getName(), $target_type);
  $children = array_map(function (Node $node) {
    return $node
      ->getId();
  }, $storage
    ->findDescendants($thisNode));

  // Cannot reference self either.
  $children[] = $this_entity
    ->id();

  // Add violations on deltas with a target_id that is not valid.
  if ($target_ids && $children) {
    $deltas = array_flip($target_ids);
    foreach ($children as $entity_id) {
      if (isset($deltas[$entity_id])) {
        $this->context
          ->buildViolation($constraint->message)
          ->setParameter('%type', $target_type)
          ->setParameter('%id', $entity_id)
          ->atPath((string) $deltas[$entity_id] . '.target_id')
          ->setInvalidValue($entity_id)
          ->addViolation();
      }
    }
  }
}