$global = optional_param('global', false, PARAM_BOOL);
     $data = $mailbox->create_label($name, $global);
     break;
 case 'get_groups_roles':
     $data = $mailbox->get_groups_roles();
     break;
 case 'get_contacts':
     $group = optional_param('group', 0, PARAM_INT);
     $roleid = optional_param('roleid', 0, PARAM_INT);
     $fi = optional_param('fi', '', PARAM_ALPHA);
     $li = optional_param('li', '', PARAM_ALPHA);
     $data = $mailbox->get_contacts($group, $fi, $li, $roleid);
     break;
 case 'get_contacts_search':
     $search = optional_param('search', '', PARAM_RAW);
     $data = array_values($mailbox->get_contacts_search($search));
     break;
 case 'refresh_contacts':
     $data = $mailbox->refresh_contacts();
     break;
 case 'get_preferences':
     $data = $mailbox->get_preferences();
     break;
 case 'save_preferences':
     $preferences = required_param('preferences', PARAM_RAW);
     $data = $mailbox->save_preferences($preferences);
     break;
 case 'save_private':
     $file = required_param('file', PARAM_RAW);
     $data = $mailbox->save_to_private_files($file);
     break;