back photo + event tags and persons

back/services/ImageResizer/IImageResizer.cs

@@ -0,0 +1,6 @@
+namespace back.services.ImageResizer;
+
+public interface IImageResizer
+{
+    Task<Stream> ResizeImage(IFormFile image, int v);
+}

back/services/ImageResizer/ImageResizer.cs

@@ -0,0 +1,23 @@
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Processing;
+
+namespace back.services.ImageResizer;
+
+public sealed class ImageResizer : IImageResizer
+{
+    public async Task<Stream> ResizeImage(IFormFile image, int maxRes)
+    {
+        if (image == null || image.Length == 0)
+        {
+            throw new ArgumentException("Invalid image file.");
+        }
+        using var inputStream = image.OpenReadStream();
+        using var outputStream = new MemoryStream();
+        using var img = Image.Load(inputStream);
+
+        img.Mutate(x => x.Resize(new ResizeOptions { Size = new Size(maxRes, 0), Mode = ResizeMode.Max }));
+        await img.SaveAsWebpAsync(outputStream);
+        outputStream.Position = 0;
+        return outputStream;
+    }
+}