BookManager::updateOutline

public BookManager::updateOutline(NodeInterface $node)

public function updateOutline(NodeInterface $node) {
  if (empty($node->book['bid'])) {
    return FALSE;
  }

  if (!empty($node->book['bid'])) {
    if ($node->book['bid'] == 'new') {
      // New nodes that are their own book.
      $node->book['bid'] = $node->id();
    }
    elseif (!isset($node->book['original_bid'])) {
      $node->book['original_bid'] = $node->book['bid'];
    }
  }

  // Ensure we create a new book link if either the node itself is new, or the
  // bid was selected the first time, so that the original_bid is still empty.
  $new = empty($node->book['nid']) || empty($node->book['original_bid']);

  $node->book['nid'] = $node->id();

  // Create a new book from a node.
  if ($node->book['bid'] == $node->id()) {
    $node->book['pid'] = 0;
  }
  elseif ($node->book['pid'] < 0) {
    // -1 is the default value in BookManager::addParentSelectFormElements().
    // The node save should have set the bid equal to the node ID, but
    // handle it here if it did not.
    $node->book['pid'] = $node->book['bid'];
  }
  return $this->saveBookLink($node->book, $new);
}