}
header('Location: ' . $homeUrl);
exit;
break;
case 'delete_all':
if (api_is_allowed_to_edit()) {
AnnouncementManager::delete_all_announcements($_course);
Display::addFlash(Display::return_message(get_lang('AnnouncementDeletedAll')));
header('Location: ' . $homeUrl);
exit;
}
break;
case 'delete_attachment':
$id = $_GET['id_attach'];
if (api_is_allowed_to_edit()) {
AnnouncementManager::delete_announcement_attachment_file($id);
}
header('Location: ' . $homeUrl);
exit;
break;
case 'showhide':
if (!isset($_GET['isStudentView']) || $_GET['isStudentView'] != 'false') {
if (isset($_GET['id']) && $_GET['id']) {
if ($sessionId != 0 && api_is_allowed_to_session_edit(false, true) == false) {
api_not_allowed();
}
if (!api_is_course_coach() || api_is_element_in_the_session(TOOL_ANNOUNCEMENT, $_GET['id'])) {
AnnouncementManager::change_visibility_announcement($_course, $_GET['id']);
Display::addFlash(Display::return_message(get_lang('VisibilityChanged')));
header('Location: ' . $homeUrl);
exit;
