}
     $sendMail = isset($values['send_mail']) ? $values['send_mail'] : null;
     switch ($values['action']) {
         case 'add':
             $announcement_id = SystemAnnouncementManager::add_announcement($values['title'], $values['content'], $values['range_start'], $values['range_end'], $values['visible_teacher'], $values['visible_student'], $values['visible_guest'], $values['lang'], $sendMail, empty($values['add_to_calendar']) ? false : true, empty($values['send_email_test']) ? false : true);
             if ($announcement_id !== false) {
                 SystemAnnouncementManager::announcement_for_groups($announcement_id, array($values['group']));
                 Display::display_confirmation_message(get_lang('AnnouncementAdded'));
             } else {
                 $show_announcement_list = false;
                 $form->display();
             }
             break;
         case 'edit':
             $sendMailTest = isset($values['send_email_test']) ? $values['send_email_test'] : null;
             if (SystemAnnouncementManager::update_announcement($values['id'], $values['title'], $values['content'], $values['range_start'], $values['range_end'], $values['visible_teacher'], $values['visible_student'], $values['visible_guest'], $values['lang'], $sendMail, $sendMailTest)) {
                 SystemAnnouncementManager::announcement_for_groups($values['id'], array($values['group']));
                 Display::display_confirmation_message(get_lang('AnnouncementUpdated'));
             } else {
                 $show_announcement_list = false;
                 $form->display();
             }
             break;
         default:
             break;
     }
     $show_announcement_list = true;
 } else {
     $form->display();
     $show_announcement_list = false;
 }
     if (api_get_setting('wcag_anysurfer_public_pages') == 'true') {
         $values['content'] = WCAG_Rendering::text_to_HTML($values['content']);
     }
     switch ($values['action']) {
         case 'add':
             $announcement_id = SystemAnnouncementManager::add_announcement($values['title'], $values['content'], $values['start'], $values['end'], $values['visible_teacher'], $values['visible_student'], $values['visible_guest'], $values['lang'], $values['send_mail'], $values['add_to_calendar']);
             if ($announcement_id !== false) {
                 SystemAnnouncementManager::announcement_for_groups($announcement_id, array($values['group']));
                 Display::display_confirmation_message(get_lang('AnnouncementAdded'));
             } else {
                 $show_announcement_list = false;
                 $form->display();
             }
             break;
         case 'edit':
             if (SystemAnnouncementManager::update_announcement($values['id'], $values['title'], $values['content'], $values['start'], $values['end'], $values['visible_teacher'], $values['visible_student'], $values['visible_guest'], $values['lang'], $values['send_mail'])) {
                 SystemAnnouncementManager::announcement_for_groups($values['id'], array($values['group']));
                 Display::display_confirmation_message(get_lang('AnnouncementUpdated'));
             } else {
                 $show_announcement_list = false;
                 $form->display();
             }
             break;
         default:
             break;
     }
     $show_announcement_list = true;
 } else {
     if (api_get_setting('wcag_anysurfer_public_pages') == 'true') {
         echo '<div class="WCAG-form">';
     }