async process on worker of AddRectangle

dotnet/AipsRT/Services/Interfaces/IMessagingService.cs

@@ -0,0 +1,8 @@
+using AipsRT.Model.Whiteboard.Shapes;
+
+namespace AipsRT.Services.Interfaces;
+
+public interface IMessagingService
+{
+    Task CreatedRectangle(Guid whiteboardId, Rectangle rectangle);
+}

dotnet/AipsRT/Services/MessagingService.cs

@@ -0,0 +1,36 @@
+using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Application.Common.Message.AddRectangle;
+using AipsCore.Application.Models.Shape.Command.CreateRectangle;
+using AipsRT.Model.Whiteboard.Shapes;
+using AipsRT.Services.Interfaces;
+
+namespace AipsRT.Services;
+
+public class MessagingService : IMessagingService
+{
+    private readonly IMessagePublisher _messagePublisher;
+
+    public MessagingService(IMessagePublisher messagePublisher)
+    {
+        _messagePublisher = messagePublisher;
+    }
+    
+    public async Task CreatedRectangle(Guid whiteboardId, Rectangle rectangle)
+    {
+        var command = new CreateRectangleCommand(
+            rectangle.Id.ToString(),
+            whiteboardId.ToString(),
+            rectangle.OwnerId.ToString(),
+            rectangle.Position.X,
+            rectangle.Position.Y,
+            rectangle.Color,
+            rectangle.EndPosition.X,
+            rectangle.EndPosition.Y,
+            rectangle.BorderThickness
+        );
+
+        var message = new AddRectangleMessage(command);
+        
+        await _messagePublisher.PublishAsync(message);
+    }
+}