Auto-Decline Invites Based On Rules

Question

Hello,
I have a CalDAV calendar, and am looking for a way to automatically decline certain events. The rules would be very simple -- basically, any invite from a particular sender should get automatically deleted/declined. I would be happy to write a script to do this, but have not had much luck finding useful pointers. Any advice would be greatly appreciated.

Answer 1

Invitations through email could be blocked from the address in question, then they won't autoforward to iCal, with "Automatically retrieve invitations from Mail" checked under iCal>Prefernces>Advanced. Whatever mechanism CalDAV uses should be easy to deal with if the filtering takes place at the email client.
If you want email from that address but want to reject only invitations, then I'd suggest a two-stage rule about an attachment extension and the address. Mail>Preferences>Rules. Then you could go nuts or even attach a script to the rule.
If you already knew all that, then I hope it wasn't too painful to read this far. It seems that automatically declining needs to be handled by the calendar client, which doesn't look easy. Sounds like a job for Automator if its all mouse interface activity, but I've never done it.