private function HierarchyManager::hierarchyGetAllowedParentTypes in Entity Reference Hierarchy 8

Get the allowed parent node types for the given child node type. This method uses configuration management to retrieve the hierarchy settings for allowed parent types based on the child node type.

Parameters

int/null $child_type: The child node type.

Return value

array An array of parent node types allowed for a given child node type.

See also

hierarchyCanBeChild

hierarchyParentOptions

2 calls to HierarchyManager::hierarchyGetAllowedParentTypes()

HierarchyManager::hierarchyCanBeChild in src/HierarchyManager.php

HierarchyManager::hierarchyParentOptions in src/HierarchyManager.php

Return a list of valid possible hierarchy parents for the given child node type. This list is passed back to hierarchyGetParentSelector so it can be displayed as a dropdown selection list.

File

src/HierarchyManager.php, line 227

Contains \Drupal\entity_hierarchy\HierarchyManager.

Class

HierarchyManager

Defines a hierarchy manager.

Namespace

Drupal\entity_hierarchy

Code

private function hierarchyGetAllowedParentTypes($child_type = NULL) {
  $allowed_children = null;

  // Static cache the results because this may be called many times for the same type on the menu overview screen.
  static $allowed_types = array();
  $config = \Drupal::config('entity_hierarchy.settings');
  if (!isset($allowed_types[$child_type])) {
    $parent_types = array();
    $types = \Drupal\node\Entity\NodeType::loadMultiple();
    foreach ($types as $type => $info) {
      $allowed_children_unfiltered = $config
        ->get('nh_allowchild_' . $type);
      if ($allowed_children_unfiltered) {
        $allowed_children = array_filter($allowed_children_unfiltered);
      }
      if (empty($child_type) && !empty($allowed_children) || in_array($child_type, (array) $allowed_children, TRUE)) {
        $parent_types[] = $type;
      }
    }
    $allowed_types[$child_type] = array_unique($parent_types);
  }
  return $allowed_types[$child_type];
}