public static function addCourse($tutorId, $teachingCoursesId, $termId)
{
foreach ($teachingCoursesId as $courseId) {
Course::validateId($courseId);
if (Tutor::teachesCourseWithIdOnTerm($courseId, $tutorId, $termId)) {
throw new Exception("Tutor already teaches a course with id {$courseId}");
}
}
Term::validateId($termId);
Tutor_has_course_has_schedule::addCourses($tutorId, $teachingCoursesId, $termId);
}
