move a bunch of stuff into subfolders

TanksServer/Services/GameTickService.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Hosting;
+
+namespace TanksServer.Services;
+
+internal sealed class GameTickService(IEnumerable<ITickStep> steps) : IHostedService
+{
+    private readonly CancellationTokenSource _cancellation = new();
+    private readonly List<ITickStep> _steps = steps.ToList();
+    private Task? _run;
+
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        _run = RunAsync();
+        return Task.CompletedTask;
+    }
+
+    private async Task RunAsync()
+    {
+        while (!_cancellation.IsCancellationRequested)
+        {
+            foreach (var step in _steps)
+                await step.TickAsync();
+            await Task.Delay(1000);
+        }
+    }
+
+    public async Task StopAsync(CancellationToken cancellationToken)
+    {
+        await _cancellation.CancelAsync();
+        if (_run != null) await _run;
+    }
+}
+
+public interface ITickStep
+{
+    Task TickAsync();
+}

TanksServer/Services/MapDrawer.cs

@@ -0,0 +1,56 @@
+namespace TanksServer.Services;
+
+internal class MapDrawer(MapService map):ITickStep
+{
+    private const uint GameFieldPixelCount = MapService.PixelsPerRow * MapService.PixelsPerColumn;
+
+    private void DrawInto(DisplayPixelBuffer buf)
+    {
+        for (var tileY = 0; tileY < MapService.TilesPerColumn; tileY++)
+        for (var tileX = 0; tileX < MapService.TilesPerRow; tileX++)
+        {
+            if (!map.IsCurrentlyWall(tileX, tileY))
+                continue;
+
+            var absoluteTilePixelY = tileY * MapService.TileSize;
+            for (var pixelInTileY = 0; pixelInTileY < MapService.TileSize; pixelInTileY++)
+            {
+                var absoluteRowStartPixelIndex = (absoluteTilePixelY + pixelInTileY) * MapService.PixelsPerRow
+                                                 + tileX * MapService.TileSize;
+                for (var pixelInTileX = 0; pixelInTileX < MapService.TileSize; pixelInTileX++)
+                    buf.Pixels[absoluteRowStartPixelIndex + pixelInTileX] = pixelInTileX % 2 == pixelInTileY % 2;
+            }
+        }
+    }
+
+    private DisplayPixelBuffer CreateGameFieldPixelBuffer()
+    {
+        var data = new byte[10 + GameFieldPixelCount / 8];
+        var result = new DisplayPixelBuffer(data)
+        {
+            Magic1 = 0,
+            Magic2 = 19,
+            X = 0,
+            Y = 0,
+            WidthInTiles = MapService.TilesPerRow,
+            HeightInPixels = MapService.PixelsPerColumn
+        };
+        return result;
+    }
+
+    private DisplayPixelBuffer? _lastFrame;
+
+    public DisplayPixelBuffer LastFrame
+    {
+        get => _lastFrame ?? throw new InvalidOperationException("first frame not yet drawn");
+        private set => _lastFrame = value;
+    }
+
+    public Task TickAsync()
+    {
+        var buffer = CreateGameFieldPixelBuffer();
+        DrawInto(buffer);
+        LastFrame = buffer;
+        return Task.CompletedTask;
+    }
+}

TanksServer/Services/MapService.cs

@@ -0,0 +1,42 @@
+namespace TanksServer.Services;
+
+internal class MapService
+{
+    public const int TilesPerRow = 44;
+    public const int TilesPerColumn = 20;
+    public const int TileSize = 8;
+    public const int PixelsPerRow = TilesPerRow * TileSize;
+    public const int PixelsPerColumn = TilesPerColumn * TileSize;
+
+    private readonly string _map =
+        """
+            ############################################
+            #...................##.....................#
+            #...................##.....................#
+            #.....####......................####.......#
+            #..........................................#
+            #............###...........###.............#
+            #............#...............#.............#
+            #...##.......#...............#......##.....#
+            #....#..............................#......#
+            #....#..##......................##..#......#
+            #....#..##......................##..#......#
+            #....#..............................#......#
+            #...##.......#...............#......##.....#
+            #............#...............#.............#
+            #............###...........###.............#
+            #..........................................#
+            #.....####......................####.......#
+            #...................##.....................#
+            #...................##.....................#
+            ############################################
+            """
+            .ReplaceLineEndings(string.Empty);
+
+    private char this[int tileX, int tileY] => _map[tileX + tileY * TilesPerRow];
+
+    public bool IsCurrentlyWall(int tileX, int tileY)
+    {
+        return this[tileX, tileY] == '#';
+    }
+}

TanksServer/Services/ServicePointDisplay.cs

@@ -0,0 +1,20 @@
+using System.Net.Sockets;
+using Microsoft.Extensions.Options;
+
+namespace TanksServer.Services;
+
+internal sealed class ServicePointDisplay(IOptions<ServicePointDisplayConfiguration> options)
+{
+    private readonly UdpClient _udpClient = new(options.Value.Hostname, options.Value.Port);
+
+    public ValueTask<int> Send(DisplayPixelBuffer buffer)
+    {
+        return _udpClient.SendAsync(buffer.Data);
+    }
+}
+
+internal sealed class ServicePointDisplayConfiguration
+{
+    public string Hostname { get; set; } = string.Empty;
+    public int Port { get; set; }
+}