}
if (isset($_GET['action']) && $_GET['action'] == 'empty') {
$mysession = api_get_session_id();
if ($mysession != 0) {
if (!((api_is_course_coach() || api_is_platform_admin()) && api_is_element_in_the_session(TOOL_SURVEY, $_GET['survey_id']))) {
// The coach can't empty a survey not belonging to his session
api_not_allowed();
exit;
}
} else {
if (!(api_is_course_admin() || api_is_platform_admin())) {
api_not_allowed();
exit;
}
}
$return = survey_manager::empty_survey(intval($_GET['survey_id']));
if ($return) {
Display::display_confirmation_message(get_lang('SurveyEmptied'), false);
} else {
Display::display_error_message(get_lang('ErrorOccurred'), false);
}
}
// Action handling: performing the same action on multiple surveys
if (isset($_POST['action']) && $_POST['action']) {
if (is_array($_POST['id'])) {
foreach ($_POST['id'] as $key => &$value) {
// getting the information of the survey (used for when the survey is shared)
$survey_data = survey_manager::get_survey($value);
// if the survey is shared => also delete the shared content
if (is_numeric($survey_data['survey_share'])) {
survey_manager::delete_survey($survey_data['survey_share'], true);
