Need advice: mailbox-based \Seen flag

Ken Murchison murch at
Thu Aug 30 22:32:19 EDT 2007

Rob Mueller wrote:
>> I actually went digging into seen state and cyrus.index a little today
>> for another reason, and I realized that we wouldn't have to 
>> expand/upgrade the index file to accomodate a shared seen state.  The 
>> existing field for system flags is just a bitmask, so we could easily 
>> add a bit for shared \Seen.  We could also implement the sharedseen 
>> annotation as a mailbox flag in the index header, just like condstore.
>> Based on other changes that I'm thinking about, I'm starting to like 
>> this idea better, even thought it *may* involve more code.
> Doesn't that just seem annoying having two *completely* different ways 
> of storing seen state? There' probably quite a few places in the code 
> that look for the seen state. It just seems much easier to me to have a 
> single flag that controls whether to open a specific users seen db, or 
> the "anyone" user seen db, rather than having to special case lots of 
> code around the place for either pulling from the seen db, or looking up 
> a bit in the index file.

Yeah, I talked myself out of this shortly after I sent the message.

Kenneth Murchison
Systems Programmer
Project Cyrus Developer/Maintainer
Carnegie Mellon University

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