add StateMachine

src/server/state/LobbyState.cpp

@@ -11,15 +11,7 @@ void LobbyState::HandlePacket(PlayerID a_Id, const protocol::PacketBase& a_Packe
 }
 
 void LobbyState::Update(float a_Delta) {
-	SetNewState(std::make_shared<GameState>(m_World));
-}
-
-void LobbyState::OnPlayerJoin(PlayerID a_Id) {
-
-}
-
-void LobbyState::OnPlayerLeave(PlayerID a_Id) {
-
+	m_StateMachine.ChangeState<GameState>(m_World);
 }
 
 }  // namespace server