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 Newtonsoft.Json;
using System.Net.WebSockets;
using System.Threading.Tasks;

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

    public async Task Handle(WebSocket socket, string json, string userName)
    {
      var request = JsonConvert.DeserializeObject<MoveRequest>(json);
      // Basic move validation
      if (request.Move.To.Equals(request.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 session = (await gameboardRepository.GetGame(request.GameName)).Session;
      var isPlayer2 = userName == session.Player2;
      // Shogi.Api expects the move coordinates from the perspective of player 1.
      var move = isPlayer2 ? Move.ConvertPerspective(request.Move) : request.Move;
      await gameboardRepository.PostMove(request.GameName, new PostMove(Mapper.Map(move)));

      var responseForPlayer1 = new MoveResponse(ClientAction.Move)
      {
        GameName = request.GameName,
        PlayerName = userName,
        Move = isPlayer2 ? Move.ConvertPerspective(request.Move) : request.Move
      };
      var responseForPlayer2 = new MoveResponse(ClientAction.Move)
      {
        GameName = request.GameName,
        PlayerName = userName,
        Move = isPlayer2 ? request.Move : Move.ConvertPerspective(request.Move)
      };
      await communicationManager.BroadcastToGame(session.Name, responseForPlayer1, responseForPlayer2);
    }
  }
}