[Spambayes] [Outlook addin] Filtering unread messages on startup

[Tim Peters]

[Moore, Paul]
> Here's a first cut at filtering any new unread messages when Outlook
> starts up (important for Exchange or IMAP users).

Note that Mark Hammond already checked in something toward the same end.

> ...
> First, the msg.unread property doesn't seem to be set right - the
> diagnostic output shows my code having filtered all of my inbox, not
> just the unread messages. This, if true, is obviously a bug. (On the
> other hand, it may be a bug in my code - I don't understand that stuff
> too well...) I can't see a simple way of checking this.

Me neither.

> Maybe I should only filter unread, unscored messages - the attached
> code doesn't do this, as I would have to wait for new mail to arrive
> if I were skipping scored messages. I'll add that once the basic thing
> is working.
>
> Second, an efficiency point - I'm going through the whole inbox via
> GetMessageGenerator(). In my case, my inbox has 365 messages, with
> only 4 unread.

Mark added code to display time consumed by the startup scan.  On my lean
Work mailbox, it's like so:

rocessing 0 missed spam in folder 'Inbox' took 1.86141ms
Processing 0 missed spam in folder 'Zope' took 6.21308ms
Processing 0 missed spam in folder 'Bayes' took 1.91225ms
Processing 0 missed spam in folder 'Checkins' took 0.590019ms

The Zope folder there had over 400 pending msgs, and 6ms to note >400
previously scored msgs is nothing.

> I was going to use the MAPI Find/FindNext methods, but the msgstore code
> doesn't expose them. Would it be worth having a method for just scanning
> unread messages (it could be used in the filter dialog, too)?

See the new GetNewUnscoredMessageGenerator() (in msgstore.py).  Mark uses a
method now that sucks out 70 unread and unscored msgs per MAPI call.