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Improve expunged message/UID tracking in IMAP sessions, track synchronization history for mailboxes/annotations.

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Keeping the message files around, and the message details in the database, is
useful for IMAP sessions that haven't seen/processed the removal of a message
yet and try to fetch it. Before, we would return errors. Similarly, a session
that has a mailbox selected that is removed can (at least in theory) still read
messages.

The mechanics to do this need keeping removed mailboxes around too. JMAP needs
that anyway, so we now keep modseq/createseq/expunged history for mailboxes
too. And while we're at it, for annotations as well.

For future JMAP support, we now also keep the mailbox parent id around for a
mailbox, with an upgrade step to set the field for existing mailboxes and
fixing up potential missing parents (which could possibly have happened in an
obscure corner case that I doubt anyone ran into).
This commit is contained in:
Mechiel Lukkien
2025-03-05 17:17:57 +01:00
parent 684c716e4d
commit 577944310c
63 changed files with 1945 additions and 1249 deletions
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8
main.go
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@ -3340,6 +3340,7 @@ open, or is not running.
}
q := bstore.QueryTx[store.Mailbox](tx)
q.FilterEqual("Expunged", false)
if len(args) == 2 {
q.FilterEqual("Name", args[1])
}
@ -3398,7 +3399,8 @@ open, or is not running.
// Reassign UIDs, going per mailbox. We assign starting at 1, only changing the
// message if it isn't already at the intended UID. Doing it in this order ensures
// we don't get into trouble with duplicate UIDs for a mailbox. We assign a new
// modseq. Not strictly needed, but doesn't hurt.
// modseq. Not strictly needed, but doesn't hurt. It's also why we assign a UID to
// expunged messages.
modseq, err := a.NextModSeq(tx)
xcheckf(err, "assigning next modseq")
@ -3424,7 +3426,7 @@ open, or is not running.
}
// Now update the uidnext, uidvalidity and modseq for each mailbox.
err = bstore.QueryTx[store.Mailbox](tx).ForEach(func(mb store.Mailbox) error {
err = bstore.QueryTx[store.Mailbox](tx).FilterEqual("Expunged", false).ForEach(func(mb store.Mailbox) error {
// Assign each mailbox a completely new uidvalidity.
uidvalidity, err := a.NextUIDValidity(tx)
if err != nil {
@ -3491,7 +3493,7 @@ open, or is not running.
err = a.DB.Write(context.Background(), func(tx *bstore.Tx) error {
// We look at each mailbox, retrieve its max UID and compare against the mailbox
// UIDNEXT.
err := bstore.QueryTx[store.Mailbox](tx).ForEach(func(mb store.Mailbox) error {
err := bstore.QueryTx[store.Mailbox](tx).FilterEqual("Expunged", false).ForEach(func(mb store.Mailbox) error {
if mb.UIDValidity > maxUIDValidity {
maxUIDValidity = mb.UIDValidity
}