public function Taxonomy::getNestedChildIds in Facets 8

Retrieve all children and nested children for one specific id.

Parameters

string $id: An entity id.

Return value

array An array of all child ids.

Overrides HierarchyInterface::getNestedChildIds

File

src/Plugin/facets/hierarchy/Taxonomy.php, line 85

Class

Taxonomy

Taxonomy hierarchy.

Namespace

Drupal\facets\Plugin\facets\hierarchy

Code

public function getNestedChildIds($id) {
  if (isset($this->nestedChildren[$id])) {
    return $this->nestedChildren[$id];
  }
  $children = $this->termStorage
    ->loadChildren($id);
  $children = array_filter(array_values(array_map(function ($it) {
    return $it
      ->id();
  }, $children)));
  $subchilds = [];
  foreach ($children as $child) {
    $subchilds = array_merge($subchilds, $this
      ->getNestedChildIds($child));
  }
  return $this->nestedChildren[$id] = array_merge($children, $subchilds);
}