function MetaEventSubscriber::addRelationshipMeta

Parameters

\Drupal\jsonapi\Events\CollectRelationshipMetaEvent $event: Event to be processed.

File

core/modules/jsonapi/tests/modules/jsonapi_test_meta_events/src/EventSubscriber/MetaEventSubscriber.php, line 74

Class

MetaEventSubscriber

Event subscriber which tests adding metadata to ResourceObjects and relationships.

Namespace

Code

public function addRelationshipMeta(CollectRelationshipMetaEvent $event) : void {
  $config = \Drupal::state()->get('jsonapi_test_meta_events.relationship_meta', [
    'enabled_type' => FALSE,
    'enabled_id' => FALSE,
    'enabled_relation' => FALSE,
    'fields' => FALSE,
    'user_is_admin_context' => FALSE,
  ]);
  // Only continue if the resource type is enabled.
  if ($config['enabled_type'] === FALSE || $config['enabled_type'] !== $event->getResourceObject()
    ->getTypeName()) {
    return;
  }
  // Only apply on the referenced ID of the resource.
  if ($config['enabled_id'] !== FALSE && $config['enabled_id'] !== $event->getResourceObject()
    ->getId()) {
    return;
  }
  // Only continue if this is the correct relation.
  if ($config['enabled_relation'] === FALSE || $config['enabled_relation'] !== $event->getRelationshipFieldName()) {
    return;
  }
  $relationshipFieldName = $event->getRelationshipFieldName();
  $field = $event->getResourceObject()
    ->getField($relationshipFieldName);
  $referencedEntities = [];
  if ($field instanceof EntityReferenceFieldItemListInterface) {
    $referencedEntities = $field->referencedEntities();
    $event->addCacheTags([
      'jsonapi_test_meta_events.relationship_meta',
    ]);
  }
  if ($config['user_is_admin_context'] ?? FALSE) {
    $event->addCacheContexts([
      'user.roles',
    ]);
    $event->setMetaValue('resource_meta_user_has_admin_role', $this->currentUserHasAdminRole());
  }
  // If no fields are specified just add a list of UUIDs to the relations.
  if ($config['fields'] === FALSE) {
    $referencedEntityIds = [];
    foreach ($referencedEntities as $entity) {
      $referencedEntityIds[] = $entity->uuid();
    }
    $event->setMetaValue('relationship_meta_' . $event->getRelationshipFieldName(), $referencedEntityIds);
    return;
  }
  // Add the metadata for each field. The field configuration must be an array
  // of field values keyed by the field name.
  foreach ($config['fields'] as $field_name) {
    $fieldValues = [];
    foreach ($referencedEntities as $entity) {
      $fieldValues[] = $entity->get($field_name)->value;
    }
    $event->setMetaValue('relationship_meta_' . $field_name, $fieldValues);
  }
}