function node_type_form_validate

Form validation handler for node_type_form().

See also

node_type_form_submit()

File

core/modules/node/node.types.inc, line 558

Content type editing user interface.

Code

function node_type_form_validate($form, &$form_state) {
  $type = new stdClass();
  $type->type = $form_state['values']['type'];
  $type->name = trim($form_state['values']['name']);

  // Work out what the type was before the user submitted this form
  $old_type = $form_state['values']['old_type'];

  $types = node_type_get_names();

  // 'theme' conflicts with theme_node_form().
  // '0' is invalid, since elsewhere we check it using empty().
  if (in_array($type->type, array('0', 'theme'))) {
    form_set_error('type', t("Invalid machine-readable name. Enter a name other than %invalid.", array('%invalid' => $type->type)));
  }

  $names = array_flip($types);

  if (isset($names[$type->name]) && $names[$type->name] != $old_type) {
    form_set_error('name', t('The human-readable name %name is already taken.', array('%name' => $type->name)));
  }
}