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improvement: more efficient /sync with gaps

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This commit is contained in:
Timo Kösters 2020-09-17 14:44:47 +02:00
parent 506c2a3146
commit ea3aaa6b5c
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GPG key ID: 24DA7517711A2BA4
10 changed files with 251 additions and 299 deletions
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152
src/client_server/sync.rs
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@ -105,50 +105,92 @@ pub async fn sync_events_route(
.room_state_get(&room_id, &EventType::RoomEncryption, "")?
.is_some();
// TODO: optimize this?
let mut send_member_count = false;
let mut joined_since_last_sync = false;
let mut new_encrypted_room = false;
for (state_key, pdu) in db
// Database queries:
let since_state_hash = db
.rooms
.pdus_since(&sender_id, &room_id, since)?
.filter_map(|r| r.ok())
.filter_map(|(_, pdu)| Some((pdu.state_key.clone()?, pdu)))
{
if pdu.kind == EventType::RoomMember {
send_member_count = true;
.pdus_until(sender_id, &room_id, since)
.next()
.and_then(|pdu| pdu.ok())
.and_then(|pdu| db.rooms.pdu_state_hash(&pdu.0).ok()?);
let content = serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(pdu.content.clone())
let since_members = since_state_hash
.as_ref()
.and_then(|state_hash| db.rooms.state_type(state_hash, &EventType::RoomMember).ok());
let since_encryption = since_state_hash.as_ref().and_then(|state_hash| {
db.rooms
.state_get(&state_hash, &EventType::RoomEncryption, "")
.ok()
});
let current_members = db.rooms.room_state_type(&room_id, &EventType::RoomMember)?;
// Calculations:
let new_encrypted_room = encrypted_room && since_encryption.is_none();
let send_member_count = since_members.as_ref().map_or(true, |since_members| {
current_members.len() != since_members.len()
});
let since_sender_member = since_members.as_ref().and_then(|members| {
members.get(sender_id.as_str()).and_then(|pdu| {
serde_json::from_value::<Raw<ruma::events::room::member::MemberEventContent>>(
pdu.content.clone(),
)
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))?;
.map_err(|_| Error::bad_database("Invalid PDU in database."))
.ok()
})
});
if pdu.state_key == Some(sender_id.to_string())
&& content.membership == MembershipState::Join
{
joined_since_last_sync = true;
} else if encrypted_room && content.membership == MembershipState::Join {
// A new user joined an encrypted room
let user_id = UserId::try_from(state_key)
.map_err(|_| Error::bad_database("Invalid UserId in member PDU."))?;
// Add encryption update if we didn't share an encrypted room already
if !share_encrypted_room(&db, &sender_id, &user_id, &room_id) {
device_list_updates.insert(user_id);
if encrypted_room {
for (user_id, current_member) in current_members {
let current_membership = serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(current_member.content.clone())
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))?
.membership;
let since_membership = since_members
.as_ref()
.and_then(|members| {
members.get(&user_id).and_then(|since_member| {
serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(since_member.content.clone())
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))
.ok()
})
})
.map_or(MembershipState::Leave, |member| member.membership);
let user_id = UserId::try_from(user_id)
.map_err(|_| Error::bad_database("Invalid UserId in member PDU."))?;
match (since_membership, current_membership) {
(MembershipState::Leave, MembershipState::Join) => {
// A new user joined an encrypted room
if !share_encrypted_room(&db, &sender_id, &user_id, &room_id) {
device_list_updates.insert(user_id);
}
}
} else if encrypted_room && content.membership == MembershipState::Leave {
// Write down users that have left encrypted rooms we are in
left_encrypted_users.insert(
UserId::try_from(state_key)
.map_err(|_| Error::bad_database("Invalid UserId in member PDU."))?,
);
(MembershipState::Join, MembershipState::Leave) => {
// Write down users that have left encrypted rooms we are in
left_encrypted_users.insert(user_id);
}
_ => {}
}
} else if pdu.kind == EventType::RoomEncryption {
new_encrypted_room = true;
}
}
let joined_since_last_sync =
since_sender_member.map_or(true, |member| member.membership != MembershipState::Join);
if joined_since_last_sync && encrypted_room || new_encrypted_room {
// If the user is in a new encrypted room, give them all joined users
device_list_updates.extend(
@ -390,23 +432,37 @@ pub async fn sync_events_route(
state: sync_events::State { events: Vec::new() },
};
let mut left_since_last_sync = false;
for pdu in db.rooms.pdus_since(&sender_id, &room_id, since)? {
let (_, pdu) = pdu?;
if pdu.kind == EventType::RoomMember && pdu.state_key == Some(sender_id.to_string()) {
let content = serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(pdu.content.clone())
let since_member = db
.rooms
.pdus_until(sender_id, &room_id, since)
.next()
.and_then(|pdu| pdu.ok())
.and_then(|pdu| {
db.rooms
.pdu_state_hash(&pdu.0)
.ok()?
.ok_or_else(|| Error::bad_database("Pdu in db doesn't have a state hash."))
.ok()
})
.and_then(|state_hash| {
db.rooms
.state_get(&state_hash, &EventType::RoomMember, sender_id.as_str())
.ok()?
.ok_or_else(|| Error::bad_database("State hash in db doesn't have a state."))
.ok()
})
.and_then(|pdu| {
serde_json::from_value::<Raw<ruma::events::room::member::MemberEventContent>>(
pdu.content.clone(),
)
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))?;
.map_err(|_| Error::bad_database("Invalid PDU in database."))
.ok()
});
if content.membership == MembershipState::Leave {
left_since_last_sync = true;
break;
}
}
}
let left_since_last_sync =
since_member.map_or(false, |member| member.membership == MembershipState::Join);
if left_since_last_sync {
device_list_left.extend(