/**
*
* checks if the 'protected' flag of a file is set and if
* the course access is closed
*
* @param string MD5 id of the file
* @return bool
*/
function check_protected_download($document_id) {
$ok = true;
if (Config::GetInstance()->getValue('ENABLE_PROTECTED_DOWNLOAD_RESTRICTION')) {
$doc = new StudipDocument($document_id);
if ($doc->getValue('protected')) {
$ok = false;
$range_id = $doc->getValue('seminar_id');
if (get_object_type($range_id) == 'sem') {
$seminar = Seminar::GetInstance($range_id);
$timed_admission = $seminar->getAdmissionTimeFrame();
if ($seminar->isPasswordProtected() ||
$seminar->isAdmissionLocked()
|| ($timed_admission['end_time'] > 0 && $timed_admission['end_time'] < time())) {
$ok = true;
} else if (StudygroupModel::isStudygroup($range_id)) {
$studygroup = Seminar::GetInstance($range_id);
if ($studygroup->admission_prelim == 1) {
$ok = true;
}
}
}
}
}
return $ok;
}
