Anthony eb3239e84d IMAP push: notify on set changes, not just count changes ...

`check_new_mail` only emitted `* N EXISTS` when the folder count changed.
That misses a real-world case: a mail moved between two folders that
share the same `sync_limit` window keeps the count constant (one mail
in, one mail out) while swapping the set — so the IDLE'd Thunderbird
session is never told and silently sticks to a stale view.

Diff by element id instead. For every mail in `self.mails` whose id is
no longer in the refreshed store, push an `* N EXPUNGE` (in descending
seqno per RFC 3501 so subsequent values don't shift). Push one `EXISTS`
afterwards with the new count; the client refetches and discovers any
freshly added mail. Same-set updates stay quiet.

5 new tests cover the four shapes (no-op, growth, removal, swap with
unchanged count) and the descending-EXPUNGE ordering.

2026-05-28 14:01:34 +02:00

..

bridge

IMAP push: notify on set changes, not just count changes

2026-05-28 14:01:34 +02:00