function _link_validate in Link 7

Same name and namespace in other branches

1. 6.2 link.inc \_link_validate()
2. 6 link.module \_link_validate()

Validates that the link field has been entered properly.

1 call to _link_validate()

link_field_validate in ./link.module

Implements hook_field_validate().

File

./link.module, line 559

Defines simple link field types.

Code

function _link_validate(&$item, $delta, $field, $entity, $instance, $langcode, &$optional_field_found, &$errors) {
  if ($item['url'] && !(isset($instance['default_value'][$delta]['url']) && $item['url'] === $instance['default_value'][$delta]['url'] && !$instance['required'])) {

    // Validate the link.
    if (!link_validate_url(trim($item['url']), $langcode)) {
      $errors[$field['field_name']][$langcode][$delta][] = array(
        'error' => 'link_required',
        'message' => t('The value %value provided for %field is not a valid URL.', array(
          '%value' => trim($item['url']),
          '%field' => $instance['label'],
        )),
        'error_element' => array(
          'url' => TRUE,
          'title' => FALSE,
        ),
      );
    }

    // Require a title for the link if necessary.
    if ($instance['settings']['title'] == 'required' && strlen(trim($item['title'])) == 0) {
      $errors[$field['field_name']][$langcode][$delta][] = array(
        'error' => 'link_required',
        'message' => t('Titles are required for all links.'),
        'error_element' => array(
          'url' => FALSE,
          'title' => TRUE,
        ),
      );
    }
  }

  // Require a link if we have a title.
  if ($instance['settings']['url'] !== 'optional' && strlen(isset($item['title']) ? $item['title'] : NULL) > 0 && strlen(trim($item['url'])) == 0) {
    $errors[$field['field_name']][$langcode][$delta][] = array(
      'error' => 'link_required',
      'message' => t('You cannot enter a title without a link url.'),
      'error_element' => array(
        'url' => TRUE,
        'title' => FALSE,
      ),
    );
  }

  // In a totally bizzaro case, where URLs and titles are optional but the field
  // is required, ensure there is at least one link.
  if ($instance['settings']['url'] === 'optional' && $instance['settings']['title'] === 'optional' && (strlen(trim($item['url'])) !== 0 || strlen(trim($item['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,
      ),
    );
  }

  // Specific logic for when using the 'select' option on the title field.
  if ($instance['settings']['title'] == 'select') {

    // The title is required.
    if (!empty($item['title']) && !empty($item['url'])) {
      $errors[$field['field_name']][$langcode][$delta][] = array(
        'error' => 'link_required',
        'message' => t('The title field is required when a URL is provided.'),
        'error_element' => array(
          'url' => FALSE,
          'title' => TRUE,
        ),
      );
    }
  }
}