move backend to subfolder

tanks-backend/TanksServer/Interactivity/SendToServicePointDisplay.cs

@@ -0,0 +1,98 @@
+using System.Diagnostics;
+using System.Net.Sockets;
+using DisplayCommands;
+using TanksServer.GameLogic;
+using TanksServer.Graphics;
+
+namespace TanksServer.Interactivity;
+
+internal sealed class SendToServicePointDisplay : IFrameConsumer
+{
+    private const int ScoresWidth = 12;
+    private const int ScoresHeight = 20;
+    private const int ScoresPlayerRows = ScoresHeight - 6;
+
+    private readonly IDisplayConnection _displayConnection;
+    private readonly MapService _mapService;
+    private readonly ILogger<SendToServicePointDisplay> _logger;
+    private readonly PlayerServer _players;
+    private readonly Cp437Grid _scoresBuffer;
+    private readonly TimeSpan _minFrameTime;
+
+    private DateTime _nextFailLogAfter = DateTime.Now;
+    private DateTime _nextFrameAfter = DateTime.Now;
+
+    public SendToServicePointDisplay(
+        PlayerServer players,
+        ILogger<SendToServicePointDisplay> logger,
+        IDisplayConnection displayConnection,
+        IOptions<HostConfiguration> hostOptions,
+        MapService mapService
+    )
+    {
+        _players = players;
+        _logger = logger;
+        _displayConnection = displayConnection;
+        _mapService = mapService;
+        _minFrameTime = TimeSpan.FromMilliseconds(hostOptions.Value.ServicePointDisplayMinFrameTimeMs);
+
+        var localIp = _displayConnection.GetLocalIPv4().Split('.');
+        Debug.Assert(localIp.Length == 4);
+        _scoresBuffer = new Cp437Grid(12, 20)
+        {
+            [00] = "== TANKS! ==",
+            [01] = "-- scores --",
+            [17] = "--  join  --",
+            [18] = string.Join('.', localIp[..2]),
+            [19] = string.Join('.', localIp[2..])
+        };
+    }
+
+    public async Task OnFrameDoneAsync(GamePixelGrid gamePixelGrid, PixelGrid observerPixels)
+    {
+        if (DateTime.Now < _nextFrameAfter)
+            return;
+        _nextFrameAfter = DateTime.Now + _minFrameTime;
+
+        RefreshScores();
+
+        try
+        {
+            await _displayConnection.SendBitmapLinearWindowAsync(0, 0, observerPixels);
+            await _displayConnection.SendCp437DataAsync(MapService.TilesPerRow, 0, _scoresBuffer);
+        }
+        catch (SocketException ex)
+        {
+            if (DateTime.Now > _nextFailLogAfter)
+            {
+                _logger.LogWarning("could not send data to service point display: {}", ex.Message);
+                _nextFailLogAfter = DateTime.Now + TimeSpan.FromSeconds(5);
+            }
+        }
+    }
+
+    private void RefreshScores()
+    {
+        var playersToDisplay = _players.GetAll()
+            .OrderByDescending(p => p.Scores.Kills)
+            .Take(ScoresPlayerRows);
+
+        ushort row = 2;
+        foreach (var p in playersToDisplay)
+        {
+            var score = p.Scores.Kills.ToString();
+            var nameLength = Math.Min(p.Name.Length, ScoresWidth - score.Length - 1);
+
+            var name = p.Name[..nameLength];
+            var spaces = new string(' ', ScoresWidth - score.Length - nameLength);
+
+            _scoresBuffer[row] = name + spaces + score;
+            row++;
+        }
+
+        for (; row < 16; row++)
+            _scoresBuffer[row] = string.Empty;
+
+        _scoresBuffer[16] = _mapService.Current.Name[..(Math.Min(ScoresWidth, _mapService.Current.Name.Length) - 1)];
+    }
+}