refactor: work on search

src/database/key_value/rooms/state.rs

@@ -0,0 +1,62 @@
+impl service::room::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<'_, StateLock>, // 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) -> Result<()> {
+        db.shorteventid_shortstatehash
+            .insert(&shorteventid.to_be_bytes(), &shortstatehash.to_be_bytes())?;
+        Ok(())
+    }
+
+    fn get_pdu_leaves(&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(
+        &self,
+        room_id: &RoomId,
+        event_ids: impl IntoIterator<Item = &'a EventId> + Debug,
+        _mutex_lock: &MutexGuard<'_, StateLock>, // 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(())
+    }
+}