initial commit

src/Oh.My.Stitcher/Program.cs

@@ -0,0 +1,55 @@
+using System.IO.Pipelines;
+using Microsoft.AspNetCore.Http.Json;
+using NetVips;
+using Oh.My.Stitcher;
+using Validation;
+using ZLogger;
+
+WebApplicationBuilder builder = WebApplication.CreateSlimBuilder(args);
+builder.Logging.ClearProviders().AddZLoggerConsole();
+builder.Services.Configure<JsonOptions>(options =>
+{
+  options.SerializerOptions.TypeInfoResolver = StitchSerializerContext.Default;
+});
+WebApplication app = builder.Build();
+
+ILoggerFactory loggerFactory = app.Services.GetRequiredService<ILoggerFactory>();
+ILogger logger = loggerFactory.CreateLogger<Program>();
+
+string? tilesDirectory = Environment.GetEnvironmentVariable("ASSET_PATH_RO");
+
+// sanity check
+Assumes.NotNullOrEmpty(tilesDirectory);
+Assumes.True(File.Exists(Path.Combine(tilesDirectory, "A1.png")));
+Assumes.True(File.Exists(Path.Combine(tilesDirectory, "AE55.png")));
+
+app.UseDefaultFiles();
+app.UseStaticFiles();
+app.MapPost("/api/image/generate", (Stitch request) =>
+{
+  Pipe pipe = new();
+  _ = Task.Run(async () =>
+  {
+    List<Image> images = [];
+    try
+    {
+      using Image image = Tile.Create(in request, tilesDirectory, images, logger);
+      image.WriteToStream(pipe.Writer.AsStream(), ".png");
+    }
+    catch( Exception e )
+    {
+      logger.ZLogError(e, $"Error when generating image");
+      using Image errorImage = Tile.CreateError(e);
+      errorImage.WriteToStream(pipe.Writer.AsStream(), ".png");
+    }
+    finally
+    {
+      foreach( Image img in images )
+        img.Dispose();
+      await pipe.Writer.CompleteAsync();
+    }
+  });
+  return Results.Stream(pipe.Reader.AsStream(), "image/png");
+});
+
+app.Run();