echo "<message>Invalid lesson id</message>";
echo "</xml>";
exit;
}
if (eF_checkParameter($_GET['login'], 'login') == false) {
echo "<xml>";
echo "<status>error</status>";
echo "<message>Invalid login format</message>";
echo "</xml>";
exit;
}
try {
$lesson = new EfrontLesson($_GET['lesson']);
$user = EfrontUserFactory::factory($_GET['login']);
$_GET['type'] != "professor" && $_GET['type'] != 'student' ? $_GET['type'] = 'student' : null;
if ($lesson->isStudentInLesson($_GET['login']) === true && $_GET['type'] == 'student' || $lesson->isProfessorInLesson($_GET['login']) === true && $_GET['type'] == 'professor') {
echo "<xml>";
echo "<status>error</status>";
echo "<message>Assignment already exists</message>";
echo "</xml>";
exit;
}
if (isset($_GET['type'])) {
$lesson->addUsers($_GET['login'], $_GET['type']);
} else {
$lesson->addUsers($_GET['login']);
}
echo "<xml>";
echo "<status>ok</status>";
echo "</xml>";
} catch (Exception $e) {
