implement feedback loop

dotnet/AipsRT/Services/RtErrorHandleStrategy.cs

@@ -0,0 +1,29 @@
+using AipsCore.Application.Common.Message.ErrorMessage;
+using AipsRT.Hubs;
+using AipsRT.Model.Whiteboard;
+using Microsoft.AspNetCore.SignalR;
+
+namespace AipsRT.Services;
+
+public class RtErrorHandleStrategy : IErrorMessageHandleStrategy
+{
+    private readonly IHubContext<WhiteboardHub> _hubContext;
+    private readonly WhiteboardManager _whiteboardManager;
+
+    public RtErrorHandleStrategy(IHubContext<WhiteboardHub> hubContext, WhiteboardManager whiteboardManager)
+    {
+        _hubContext = hubContext;
+        _whiteboardManager = whiteboardManager;
+    }
+    
+    public async Task Handle(ErrorMessage message, CancellationToken cancellationToken)
+    {
+        await _whiteboardManager.RefreshWhiteboard(message.WhiteboardId);
+        
+        var whiteboard = _whiteboardManager.GetWhiteboard(message.WhiteboardId)!;
+        
+        await _hubContext.Clients
+            .Group(whiteboard.WhiteboardId.ToString())
+            .SendAsync("InitWhiteboard", whiteboard, cancellationToken);
+    }
+}