public static function add_user_assignment(UserProfile $profile, Token $id) { if ($id->getType() != TOKEN_ASSIGNMENT) { throw new InvalidAssignmentException("Assignment id provided is not a valid assignment id", $id); } $assignment = AssignmentBackend::fetch_assignment_profile($id); $query = Database::generate_query("user_assignment_add", [$profile->getUserId()->toString(), $assignment["assignment-id"], $assignment["assessment-id"]->toString()]); $query->execute(); return $assignment; }