function link_field_validate

Implements hook_field_validate().

Most validations are done at the element level, which runs before this.

File

core/modules/link/link.module, line 285

Defines simple link field types.

Code

function link_field_validate($entity_type, $entity, $field, $instance, $langcode, $items, &$errors) {
  // When setting a default value on the field instance settings form, $entity
  // will be NULL. Do not validate the default provided values, which allows
  // for default titles to be provided but not a URL (or vice-versa). Invalid
  // or partial URLs are also acceptable for default values.
  if (is_null($entity)) {
    return;
  }

  // In a totally bizarre case, where URLs and titles are optional but the field
  // is required, ensure there is at least one link. Populate the
  // $optional_field_found variable if any "required" values have been provided.
  $optional_field_found = FALSE;
  foreach ($items as $delta => $value) {
    if ($instance['settings']['url'] === 'optional' && $instance['settings']['title'] === 'optional' && (strlen(trim($value['url'])) !== 0 || strlen(trim($value['title'])) !== 0)) {
      $optional_field_found = TRUE;
    }
  }
  // Require entire field.
  if ($instance['settings']['url'] === 'optional' && $instance['settings']['title'] === 'optional' && $instance['required'] == 1 && !$optional_field_found && isset($instance['id'])) {
    $errors[$field['field_name']][$langcode][$delta][] = array(
      'error' => 'link_required',
      'message' => t('At least one title or URL must be entered.'),
      'error_element' => array('url' => FALSE, 'title' => TRUE),
    );
  }
  // If no values were provided across all values but the field itself is
  // required, throw a validation error on the first field.
  if ($instance['settings']['url'] === 'optional' && $instance['settings']['title'] === 'optional' && $instance['required'] && !$optional_field_found) {
    $errors[$field['field_name']][$langcode][0][] = array(
      'error' => 'link_required',
      'message' => t('At least one title or URL must be entered.'),
      'error_element' => array('url' => FALSE, 'title' => TRUE),
    );
  }
}