+ if not (tutors#isAuthenticated tutor_id) then begin (* unauthorized *)
+ Hbugs_messages.respond_exc "forbidden" tutor_id outchan;
+ end else if not (musings#isActive musing_id) then begin (* too late *)
+ Hbugs_messages.respond_msg (Too_late (my_own_id, musing_id)) outchan;
+ end else begin (* all is ok: autorhized and on time *)