70 lines
2.2 KiB
C#
70 lines
2.2 KiB
C#
using System.Diagnostics;
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using System.Net.WebSockets;
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using DisplayCommands;
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using TanksServer.Graphics;
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namespace TanksServer.Interactivity;
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internal sealed class ClientScreenServerConnection(
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WebSocket webSocket,
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ILogger<ClientScreenServerConnection> logger,
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TimeSpan minFrameTime,
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Guid? playerGuid = null
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) : WebsocketServerConnection(logger, new ByteChannelWebSocket(webSocket, logger, 0)),
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IDisposable
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{
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private readonly SemaphoreSlim _wantedFrames = new(1);
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private readonly PlayerScreenData? _playerScreenData = playerGuid.HasValue ? new PlayerScreenData(logger) : null;
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private DateTime _nextFrameAfter = DateTime.Now;
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public void Dispose() => _wantedFrames.Dispose();
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public async Task SendAsync(PixelGrid pixels, GamePixelGrid gamePixelGrid)
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{
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if (_nextFrameAfter > DateTime.Now)
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return;
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if (!await _wantedFrames.WaitAsync(TimeSpan.Zero))
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{
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Logger.LogTrace("client does not want a frame yet");
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return;
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}
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_nextFrameAfter = DateTime.Today + minFrameTime;
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if (_playerScreenData != null)
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RefreshPlayerSpecificData(gamePixelGrid);
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Logger.LogTrace("sending");
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try
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{
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Logger.LogTrace("sending {} bytes of pixel data", pixels.Data.Length);
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await Socket.SendBinaryAsync(pixels.Data, _playerScreenData == null);
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if (_playerScreenData != null)
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await Socket.SendBinaryAsync(_playerScreenData.GetPacket());
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}
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catch (WebSocketException ex)
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{
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Logger.LogWarning(ex, "send failed");
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}
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}
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private void RefreshPlayerSpecificData(GamePixelGrid gamePixelGrid)
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{
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Debug.Assert(_playerScreenData != null);
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_playerScreenData.Clear();
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foreach (var gamePixel in gamePixelGrid)
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{
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if (!gamePixel.EntityType.HasValue)
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continue;
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_playerScreenData.Add(gamePixel.EntityType.Value, gamePixel.BelongsTo?.Id == playerGuid);
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}
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}
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protected override ValueTask HandleMessageAsync(Memory<byte> _)
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{
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_wantedFrames.Release();
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return ValueTask.CompletedTask;
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}
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}
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