function layout_settings_form_validate

Validates layout_settings_form(), ensuring a valid path.

File

core/modules/layout/layout.admin.inc, line 842

Admin page callbacks for the Layout module.

Code

function layout_settings_form_validate(&$form, &$form_state) {
  /* @var Layout $layout */
  $layout = $form_state['layout'];

  // Remove trailing and preceding slashes.
  $path = $form_state['values']['path'] = trim($form_state['values']['path'], '/');

  if (strpos($path, '%') === 0) {
    form_error($form['path'], t('The first part of a path may not be a placeholder.'));
  }

  // Ensure the path is not already an alias to something else.
  if (strpos($path, '%') === FALSE) {
    $alias = db_query('SELECT * FROM {url_alias} WHERE alias = :path', array(':path' => $path))->fetchObject();
    if ($alias) {
      $error = t('That path is currently assigned to be an alias for "@alias".', array('@alias' => $alias->source));
      if (user_access('administer url aliases')) {
        $error .= ' ' . t('<a href="!url">Delete the alias first</a>, then save this layout.', array('!url' => url('admin/config/urls/path/delete/' . $alias->pid, array('query' => array('destination' => $_GET['q'])))));
      }
      form_error($form['path'], $error);
    }
  }

  // Ensure path is properly formed.
  $parts = explode('/', $path);
  foreach ($parts as $part) {
    $wildcard_position = strpos($part, '%');
    if ($wildcard_position !== FALSE && ($wildcard_position > 0 || strlen($part) > 1)) {
      form_error($form['path'], t('Placeholders must be the only character in their part of the path i.e. "@part" should be "%".', array('@part' => $part)));
    }
  }

  // Ensure that all conditions have context requirements met.
  $context_plugins = array(
    'user', // The user plugin is always available for the current user.
  );
  $contexts = layout_context_required_by_path($path);
  foreach ($contexts as $context) {
    $context_plugins[] = $context->plugin;
  }
  foreach ($layout->conditions as $key => $condition) {
    $required_contexts = $condition->getRequiredContexts();
    if (array_diff($required_contexts, $context_plugins)) {
      form_error($form['conditions']['active'][$key], t('The condition \'!condition\' does not have the required contexts at this path. Remove the condition to save the layout.', array('!condition' => $condition->summary())));
    }
  }
}