}
ParseClient::setStorage(new ParseSessionStorage());
$currentUser = ParseUser::getCurrentUser();
$courseTitle = $_POST["course"];
$classNumber = $_POST["classNumber"];
$courseQuery = new ParseQuery("Course");
$courseQuery->equalTo("Title", $courseTitle);
$course = $courseQuery->first();
$classQuery = new ParseQuery("Class");
$classQuery->equalTo("Course", $course);
$classQuery->equalTo("ClassNumber", intval($classNumber));
$class = $classQuery->first();
$doubt = new ParseObject("Doubt");
$doubt->set("User", $currentUser);
$doubt->set("Course", $course);
$doubt->set("Class", $class);
$doubt->set("Text", $_POST["doubt"]);
$doubt->save();
$doubtsCourseQuery = new ParseQuery("doubtCourse");
$doubtsCourseQuery->equalTo("User", $currentUser);
$doubtsCourseQuery->equalTo("CourseName", $courseTitle);
$doubtsCourse = $doubtsCourseQuery->first();
if ($doubtsCourse == null) {
    $doubtsCourse = new parseObject("doubtCourse");
    $doubtsCourse->set("User", $currentUser);
    $doubtsCourse->set("Course", $course);
    $doubtsCourse->set("CourseName", $courseTitle);
}
$doubtsCourse->add("Doubts", [$doubt]);
$doubtsCourse->save();
// header("Location: class.php?course= ")