React to externally left and joined rooms, and add "leave room" button in room menu (#75)

* Initial "join room" feature.
* React correctly to remotely joined rooms.
* Leaving rooms implemented both locally using the room menu
   in nheko, and reacting properly when leaving a room remotely 
   from another client.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/Cache.cc b/src/Cache.cc

index bda81316..5ed77086 100644
--- a/src/Cache.cc
+++ b/src/Cache.cc
@@ -153,6 +153,16 @@ Cache::insertRoomState(lmdb::txn &txn, const QString &roomid, const RoomState &s
         }
 }
 
+void
+Cache::removeRoom(const QString &roomid)
+{
+        auto txn = lmdb::txn::begin(env_, nullptr, 0);
+
+        lmdb::dbi_del(txn, roomDb_, lmdb::val(roomid.toUtf8(), roomid.toUtf8().size()), nullptr);
+
+        txn.commit();
+}
+
 QMap<QString, RoomState>
 Cache::states()
 {