function node_import_check_book_reference in Node import 6

Check whether the value is a book (by NID or Title).

Uses: nothing.

Related topics

1 string reference to 'node_import_check_book_reference'

book_node_import_fields_alter in supported/book.inc

Implementation of hook_node_import_fields_alter().

File

supported/book.inc, line 69

Support file for the core book module.

Code

function node_import_check_book_reference(&$value, $field, $options, $preview) {
  static $first_run = TRUE;
  if ($first_run) {
    foreach (node_import_extract_property(book_get_books()) as $nid => $title) {
      node_import_set_object('book', $title, $nid);
      node_import_set_object('book', $nid, $nid);
      node_import_set_object('book:title', $nid, $title);
    }
    $first_run = FALSE;
  }
  if ($value == '<none>') {

    // Not in a book.
    $value = '';
    return TRUE;
  }
  else {
    if ($value == '<new>') {

      // A new top-level book.
      $value = 'new';
      return TRUE;
    }
    else {
      if (($bid = node_import_get_object('book', $value)) !== NULL) {

        // An existing book.
        $value = $bid;
        return TRUE;
      }
    }
  }
  node_import_input_error(t('Input error: %value is not allowed for %name (not a book).', array(
    '%value' => $value,
    '%name' => $field['title'],
  )));
  return FALSE;
}