Shogi/Gameboard.ShogiUI.Sockets/Managers/ClientActionHandlers/MoveHandler.cs

using Gameboard.Shogi.Api.ServiceModels.Messages;
using Gameboard.ShogiUI.Sockets.Extensions;
using Gameboard.ShogiUI.Sockets.Managers.Utility;
using Gameboard.ShogiUI.Sockets.Repositories;
using Gameboard.ShogiUI.Sockets.ServiceModels.Socket.Messages;
using Gameboard.ShogiUI.Sockets.ServiceModels.Socket.Types;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System.Net.WebSockets;
using System.Threading.Tasks;

namespace Gameboard.ShogiUI.Sockets.Managers.ClientActionHandlers
{
  public class MoveHandler : IActionHandler
  {
    private readonly ILogger<MoveHandler> logger;
    private readonly IGameboardRepository gameboardRepository;
    private readonly ISocketCommunicationManager communicationManager;
    public MoveHandler(
      ILogger<MoveHandler> logger,
      ISocketCommunicationManager communicationManager,
      IGameboardRepository gameboardRepository)
    {
      this.logger = logger;
      this.gameboardRepository = gameboardRepository;
      this.communicationManager = communicationManager;
    }

    public async Task Handle(WebSocket socket, string json, string userName)
    {
      logger.LogInformation("Socket Request \n{0}\n", new[] { json });
      var request = JsonConvert.DeserializeObject<MoveRequest>(json);
      // Basic move validation
      var move = request.Move;
      if (move.To.Equals(move.From))
      {
        var serialized = JsonConvert.SerializeObject(
            new ErrorResponse(ClientAction.Move)
            {
              Error = "Error: moving piece from tile to the same tile."
            });
        await socket.SendTextAsync(serialized);
        return;
      }

      var getSessionResponse = await gameboardRepository.GetGame(request.GameName);
      var isPlayer1 = userName == getSessionResponse.Session.Player1;
      if (!isPlayer1)
      {
        // Convert the move coords to player1 perspective.
        move = Move.ConvertPerspective(move);
      }

      await gameboardRepository.PostMove(request.GameName, new PostMove(Mapper.Map(move)));

      var response = new MoveResponse(ClientAction.Move)
      {
        GameName = request.GameName,
        PlayerName = userName
      };
      await communicationManager.BroadcastToGame(
          request.GameName,
          (playerName, sslStream) =>
          {
            response.Move = playerName.Equals(userName)
                  ? request.Move
                  : Move.ConvertPerspective(request.Move);
            var serialized = JsonConvert.SerializeObject(response);
            logger.LogInformation("Socket Response \n{0}\n", new[] { serialized });
            return serialized;
          }
      );
    }
  }
}