working on multiplayer

Runtime/Engine/Code/GameMode/GameModesService.cs

@@ -0,0 +1,62 @@
+using System.Threading;
+using Cysharp.Threading.Tasks;
+using R3;
+using RebootKit.Engine.Foundation;
+using RebootKit.Engine.Main;
+using RebootKit.Engine.Services.Simulation;
+
+namespace RebootKit.Engine.Services.GameMode {
+    public class GameModesService : IService {
+        static readonly Logger s_logger = new Logger(nameof(GameModesService));
+
+        [Inject] DIContext m_DIContext;
+
+        GameModeAsset m_GameModeAsset;
+
+        readonly CancellationTokenSource m_DestroyCancellationTokenSource = new CancellationTokenSource();
+        DisposableBag m_ActiveGameModeDisposableBag;
+        readonly ReactiveProperty<IGameMode> m_ActiveGameMode = new ReactiveProperty<IGameMode>(null);
+        
+        public ReadOnlyReactiveProperty<IGameMode> ActiveGameMode => m_ActiveGameMode;
+
+        public void Dispose() {
+            m_DestroyCancellationTokenSource.Cancel();
+            m_DestroyCancellationTokenSource.Dispose();
+            m_ActiveGameModeDisposableBag.Dispose();
+        }
+
+        public void Start(GameModeAsset asset, WorldConfig worldConfig) {
+            if (m_ActiveGameMode.Value != null) {
+                s_logger.Warning("Game is already running");
+                return;
+            }
+
+            Stop();
+
+            m_ActiveGameModeDisposableBag = new DisposableBag();
+            m_ActiveGameMode.Value = asset.Create();
+            m_ActiveGameModeDisposableBag.Add(m_ActiveGameMode);
+            
+            InitializeGameModeAsync(worldConfig, CancellationToken.None).Forget();
+        }
+
+        async UniTask InitializeGameModeAsync(WorldConfig worldConfig, CancellationToken cancellationToken) {
+            await m_ActiveGameMode.Value.OnInit(m_DestroyCancellationTokenSource.Token);
+
+            await RR.World.LoadAsync(worldConfig, cancellationToken);
+            m_ActiveGameMode.Value.OnStart();
+            Observable.EveryUpdate().Subscribe(_ => { m_ActiveGameMode.Value?.OnTick(); }).AddTo(ref m_ActiveGameModeDisposableBag);
+        }
+
+        public void Stop() {
+            if (m_ActiveGameMode.Value == null) {
+                return;
+            }
+
+            m_ActiveGameMode.Value.OnStop();
+            m_ActiveGameMode.Value = null;
+
+            m_ActiveGameModeDisposableBag.Dispose();
+        }
+    }
+}