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fix(blahd): merge queries for last-seen update

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This commit is contained in:
oxalica 2024-09-24 19:37:50 -04:00
parent 0911d56e22
commit c4fbf1294b
1 changed files with 9 additions and 21 deletions
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30
blahd/src/database.rs
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@ -553,34 +553,22 @@ pub trait TransactionOps {
}
fn mark_room_msg_seen(&self, rid: Id, uid: i64, cid: Id) -> Result<()> {
let max_cid_in_room = prepare_cached_and_bind!(
self.conn(),
r"
SELECT MAX(`cid`)
FROM `msg` INDEXED BY `room_latest_msg`
WHERE `rid` = :rid
"
)
.raw_query()
.next()?
.map(|row| row.get(0))
.transpose()?
.unwrap_or(Id(0));
// FIXME: This leaks room existence information.
api_ensure!(cid <= max_cid_in_room, "invalid cid");
// We should already verify the existence of the room member.
let updated = prepare_cached_and_bind!(
self.conn(),
r"
UPDATE `room_member`
SET `last_seen_cid` = MAX(`last_seen_cid`, :cid)
WHERE (`rid`, `uid`) = (:rid, :uid)
SET `last_seen_cid` = :cid
WHERE (`rid`, `uid`) = (:rid, :uid) AND
:cid <= (
SELECT MAX(`cid`)
FROM `msg` INDEXED BY `room_latest_msg`
WHERE `rid` = :rid
)
"
)
.raw_execute()?;
if updated != 1 {
return Err(ApiError::RoomNotFound);
}
api_ensure!(updated == 1, "invalid cid");
Ok(())
}
}