function LoopExpression::checkIntegrity

Overrides ExpressionContainerBase::checkIntegrity

File

src/Plugin/RulesExpression/LoopExpression.php, line 59

Class

LoopExpression

Holds a set of actions that are executed over the iteration of a list.

Namespace

Code

public function checkIntegrity(ExecutionMetadataStateInterface $metadata_state, $apply_assertions = TRUE) {
  $violation_list = new IntegrityViolationList();
  if (empty($this->configuration['list'])) {
    $violation_list->addViolationWithMessage($this->t('List variable is missing.'));
    return $violation_list;
  }
  try {
    $list_definition = $metadata_state->fetchDefinitionByPropertyPath($this->configuration['list']);
  } catch (IntegrityException $e) {
    $violation_list->addViolationWithMessage($this->t('List variable %list does not exist. @message', [
      '%list' => $this->configuration['list'],
      '@message' => $e->getMessage(),
    ]));
    return $violation_list;
  }
  $list_item_name = $this->configuration['list_item'] ?? 'list_item';
  if ($metadata_state->hasDataDefinition($list_item_name)) {
    $violation_list->addViolationWithMessage($this->t('List item name %name conflicts with an existing variable.', [
      '%name' => $list_item_name,
    ]));
    return $violation_list;
  }
  if (!$list_definition instanceof ListDataDefinitionInterface) {
    $violation_list->addViolationWithMessage($this->t('The data type of list variable %list is not a list.', [
      '%list' => $this->configuration['list'],
    ]));
    return $violation_list;
  }
  // So far all ok, so continue with checking integrity in contained actions.
  // The parent implementation will take care of invoking pre/post traversal
  // metadata state preparations.
  $violation_list = parent::checkIntegrity($metadata_state, $apply_assertions);
  return $violation_list;
}