Initial commit

App/Controllers/ImageController.cs

@@ -0,0 +1,53 @@
+using System.Text.Json;
+using StitchATon2.App.Models;
+using StitchATon2.Domain;
+
+namespace StitchATon2.App.Controllers;
+
+public static class ImageController
+{
+    public static async Task GenerateImage(HttpResponse response, GenerateImageDto dto, TileManager tileManager)
+    {
+        if (dto.GetErrors() is { Count: > 0 } errors)
+        {
+            response.StatusCode = 422;
+            response.ContentType = "text/json";
+            var errorBody = JsonSerializer.Serialize(errors, AppJsonSerializerContext.Default.DictionaryStringListString);
+            response.ContentLength = errorBody.Length;
+            await response.WriteAsync(errorBody);
+            await response.CompleteAsync();
+            return;
+        }
+        
+        response.StatusCode = 200;
+        response.ContentType = "image/png";
+
+        await tileManager
+            .CreateSection(dto)
+            .WriteToStream(response.Body, dto.OutputScale);
+        
+        await response.CompleteAsync();
+    }
+    
+    public static async Task GenerateRandomImage(HttpResponse response, TileManager tileManager)
+    {
+        response.StatusCode = 200;
+        response.ContentType = "image/png";
+
+        var maxId = tileManager.Configuration.Rows * tileManager.Configuration.Columns;
+        var id0 = Random.Shared.Next(maxId);
+        var id1 = Random.Shared.Next(maxId);
+        
+        var tile0 = tileManager.GetTile(id0);
+        var tile1 = tileManager.GetTile(id1);
+        var coordinatePair = $"{tile0.Coordinate}:{tile1.Coordinate}";
+        
+        var section = tileManager.CreateSection(coordinatePair, 0, 0, 1, 1);
+        
+        var scale = float.Clamp(480f / int.Max(section.Width, section.Height), 0.01f, 1f);
+        Console.WriteLine($"Generate random image for {coordinatePair} scale: {scale}");
+        
+        await section.WriteToStream(response.Body, scale);
+        await response.CompleteAsync();
+    }
+}