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use ruma::{RoomId, EventId};
use std::sync::Arc;
use std::{sync::MutexGuard, collections::HashSet};
use std::fmt::Debug;
use crate::{service, database::KeyValueDatabase, utils, Error, Result};
impl service::rooms::state::Data for KeyValueDatabase {
fn get_room_shortstatehash(&self, room_id: &RoomId) -> Result<Option<u64>> {
self.roomid_shortstatehash
.get(room_id.as_bytes())?
.map_or(Ok(None), |bytes| {
Ok(Some(utils::u64_from_bytes(&bytes).map_err(|_| {
Error::bad_database("Invalid shortstatehash in roomid_shortstatehash")
})?))
})
}
fn set_room_state(&self, room_id: &RoomId, new_shortstatehash: u64,
_mutex_lock: &MutexGuard<'_, ()>, // Take mutex guard to make sure users get the room state mutex
) -> Result<()> {
self.roomid_shortstatehash
.insert(room_id.as_bytes(), &new_shortstatehash.to_be_bytes())?;
Ok(())
}
fn set_event_state(&self, shorteventid: u64, shortstatehash: u64) -> Result<()> {
self.shorteventid_shortstatehash
.insert(&shorteventid.to_be_bytes(), &shortstatehash.to_be_bytes())?;
Ok(())
}
fn get_forward_extremities(&self, room_id: &RoomId) -> Result<HashSet<Arc<EventId>>> {
let mut prefix = room_id.as_bytes().to_vec();
prefix.push(0xff);
self.roomid_pduleaves
.scan_prefix(prefix)
.map(|(_, bytes)| {
EventId::parse_arc(utils::string_from_bytes(&bytes).map_err(|_| {
Error::bad_database("EventID in roomid_pduleaves is invalid unicode.")
})?)
.map_err(|_| Error::bad_database("EventId in roomid_pduleaves is invalid."))
})
.collect()
}
fn set_forward_extremities<'a>(
&self,
room_id: &RoomId,
event_ids: impl IntoIterator<Item = &'a EventId> + Debug,
_mutex_lock: &MutexGuard<'_, ()>, // Take mutex guard to make sure users get the room state mutex
) -> Result<()> {
let mut prefix = room_id.as_bytes().to_vec();
prefix.push(0xff);
for (key, _) in self.roomid_pduleaves.scan_prefix(prefix.clone()) {
self.roomid_pduleaves.remove(&key)?;
}
for event_id in event_ids {
let mut key = prefix.to_owned();
key.extend_from_slice(event_id.as_bytes());
self.roomid_pduleaves.insert(&key, event_id.as_bytes())?;
}
Ok(())
}
}
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