protected function MenuLinkStorageController::moveChildren

Updates the children of a menu link that is being moved.

The menu name, parents (p1 - p6), and depth are updated for all children of the link, and the has_children status of the previous parent is updated.

Parameters

\Drupal\Core\Entity\EntityInterface $entity: A menu link entity.

File

drupal/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php, line 604

Contains \Drupal\menu_link\MenuLinkStorageController.

Class

MenuLinkStorageController

Controller class for menu links.

Namespace

Code

protected function moveChildren(EntityInterface $entity) {
  $query = $this->database
    ->update($this->entityInfo['base_table']);
  $query
    ->fields(array(
    'menu_name' => $entity->menu_name,
  ));
  $p = 'p1';
  $expressions = array();
  for ($i = 1; $i <= $entity->depth; $p = 'p' . ++$i) {
    $expressions[] = array(
      $p,
      ":p_{$i}",
      array(
        ":p_{$i}" => $entity->{$p},
      ),
    );
  }
  $j = $entity->original->depth + 1;
  while ($i <= MENU_MAX_DEPTH && $j <= MENU_MAX_DEPTH) {
    $expressions[] = array(
      'p' . $i++,
      'p' . $j++,
      array(),
    );
  }
  while ($i <= MENU_MAX_DEPTH) {
    $expressions[] = array(
      'p' . $i++,
      0,
      array(),
    );
  }
  $shift = $entity->depth - $entity->original->depth;
  if ($shift > 0) {

    // The order of expressions must be reversed so the new values don't
    // overwrite the old ones before they can be used because "Single-table
    // UPDATE assignments are generally evaluated from left to right"
    // @see http://dev.mysql.com/doc/refman/5.0/en/update.html
    $expressions = array_reverse($expressions);
  }
  foreach ($expressions as $expression) {
    $query
      ->expression($expression[0], $expression[1], $expression[2]);
  }
  $query
    ->expression('depth', 'depth + :depth', array(
    ':depth' => $shift,
  ));
  $query
    ->condition('menu_name', $entity->original->menu_name);
  $p = 'p1';
  for ($i = 1; $i <= MENU_MAX_DEPTH && $entity->original->{$p}; $p = 'p' . ++$i) {
    $query
      ->condition($p, $entity->original->{$p});
  }
  $query
    ->execute();

  // Check the has_children status of the parent, while excluding this item.
  $this
    ->updateParentalStatus($entity->original, TRUE);
}