Before changing Piece[,] to Dictionary<string,Piece>

Gameboard.ShogiUI.Sockets/Services/RequestValidators/JoinGameRequestValidator.cs

@@ -0,0 +1,15 @@
+using FluentValidation;
+using Gameboard.ShogiUI.Sockets.ServiceModels.Socket.Messages;
+using Gameboard.ShogiUI.Sockets.ServiceModels.Socket.Types;
+
+namespace Gameboard.ShogiUI.Sockets.Services.RequestValidators
+{
+  public class JoinGameRequestValidator : AbstractValidator<JoinGameRequest>
+  {
+    public JoinGameRequestValidator()
+    {
+      RuleFor(_ => _.Action).Equal(ClientAction.JoinGame);
+      RuleFor(_ => _.GameName).NotEmpty();
+    }
+  }
+}