protected function CorrespondingReference::calculateDifferences in Corresponding Entity References 8.4

Return added and removed entities from the provided field.

Parameters

\Drupal\Core\Entity\FieldableEntityInterface $entity: The current entity.

string $fieldName: The field name to check.

bool $deleted: Whether the entity is deleted.

Return value

array The differences keyed by 'added' and 'removed'.

1 call to CorrespondingReference::calculateDifferences()

CorrespondingReference::synchronizeCorrespondingFields in src/Entity/CorrespondingReference.php

Synchronizes corresponding fields on the given entity.

File

src/Entity/CorrespondingReference.php, line 368

Class

CorrespondingReference

Defines a corresponding reference entity.

Namespace

Drupal\cer\Entity

Code

protected function calculateDifferences(FieldableEntityInterface $entity, $fieldName, $deleted = FALSE) {

  /** @var FieldableEntityInterface $original */
  $original = isset($entity->original) ? $entity->original : NULL;
  $differences = [
    CorrespondingReferenceOperations::ADD => [],
    CorrespondingReferenceOperations::REMOVE => [],
  ];
  if (!$entity
    ->hasField($fieldName)) {
    return $differences;
  }
  $entityField = $entity
    ->get($fieldName);

  // If entity is deleted, remove references to it.
  if ($deleted) {

    /** @var FieldItemInterface $fieldItem */
    foreach ($entityField as $fieldItem) {
      $differences[CorrespondingReferenceOperations::REMOVE][] = $fieldItem->entity;
    }
    return $differences;
  }
  if (empty($original)) {
    foreach ($entityField as $fieldItem) {
      $differences[CorrespondingReferenceOperations::ADD][] = $fieldItem->entity;
    }
    return $differences;
  }
  $originalField = $original
    ->get($fieldName);
  foreach ($entityField as $fieldItem) {
    if (!$this
      ->entityHasValue($original, $fieldName, $fieldItem->target_id)) {
      $differences[CorrespondingReferenceOperations::ADD][] = $fieldItem->entity;
    }
  }
  foreach ($originalField as $fieldItem) {
    if (!$this
      ->entityHasValue($entity, $fieldName, $fieldItem->target_id)) {
      $differences[CorrespondingReferenceOperations::REMOVE][] = $fieldItem->entity;
    }
  }
  return $differences;
}