testing using libvips

AobaCore/Services/AobaService.cs

@@ -40,6 +40,11 @@ public class AobaService(IMongoDatabase db)
 		return new PagedResult<Media>(items, page, pageSize, total);
 	}
 
+	public async Task<List<Media>> FindMediaWithExtAsync(string ext, CancellationToken cancellationToken = default)
+	{
+		var filter = Builders<Media>.Filter.Eq(m => m.Ext, ext);
+		return await _media.Find(filter).ToListAsync();
+	}
 
 	public Task AddMediaAsync(Media media, CancellationToken cancellationToken = default)
 	{
@@ -53,6 +58,13 @@ public class AobaService(IMongoDatabase db)
 		await _media.UpdateOneAsync(m => m.MediaId == mediaId, upate, cancellationToken: cancellationToken);
 	}
 
+	public async Task RemoveThumbnailAsync(ObjectId mediaId, ThumbnailSize size, CancellationToken cancellationToken = default)
+	{
+		var upate = Builders<Media>.Update.Unset(m => m.Thumbnails[size]);
+
+		await _media.UpdateOneAsync(m => m.MediaId == mediaId, upate, cancellationToken: cancellationToken);
+	}
+
 	public async Task<ObjectId> GetThumbnailIdAsync(ObjectId mediaId, ThumbnailSize size, CancellationToken cancellationToken = default)
 	{
 		var thumb = await _media.Find(m => m.MediaId == mediaId).Project(m => m.Thumbnails[size]).FirstOrDefaultAsync(cancellationToken);

AobaCore/Services/ThumbnailService.cs

@@ -16,6 +16,7 @@ using SixLabors.ImageSharp.Processing;
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Net.Http.Headers;
 using System.Text;
@@ -27,6 +28,28 @@ public class ThumbnailService(IMongoDatabase db, AobaService aobaService)
 {
 	private readonly GridFSBucket _gridfs = new GridFSBucket(db);
 
+	public async Task<Error?> DeleteThumbnailAsync(ObjectId mediaId, ThumbnailSize size)
+	{
+		var thumbId = await aobaService.GetThumbnailIdAsync(mediaId, size);
+		if (thumbId == default)
+			return null;
+		try
+		{
+			await _gridfs.DeleteAsync(thumbId);
+			await aobaService.RemoveThumbnailAsync(mediaId, size);
+		}
+		catch (GridFSFileNotFoundException)
+		{
+			//Ignore if the file was not found (somehow already deleted)
+			await aobaService.RemoveThumbnailAsync(mediaId, size);
+		}
+		catch (Exception e)
+		{
+			return new ExceptionError(e);
+		}
+		return null;
+	}
+
 	/// <summary>
 	///
 	/// </summary>
@@ -36,6 +59,7 @@ public class ThumbnailService(IMongoDatabase db, AobaService aobaService)
 	/// <returns></returns>
 	public async Task<Maybe<Stream>> GetOrCreateThumbnailAsync(ObjectId mediaId, ThumbnailSize size, CancellationToken cancellationToken = default)
 	{
+
 		var existingThumb = await GetThumbnailAsync(mediaId, size, cancellationToken);
 		if (existingThumb != null)
 			return existingThumb;
@@ -132,7 +156,7 @@ public class ThumbnailService(IMongoDatabase db, AobaService aobaService)
 		return result;
 	}
 
-	public Maybe<Stream> GenerateVideoThumbnail(Stream data, ThumbnailSize size, CancellationToken cancellationToken = default)
+	public static Maybe<Stream> GenerateVideoThumbnail(Stream data, ThumbnailSize size, CancellationToken cancellationToken = default)
 	{
 		var w = (int)size;
 		var fn = ObjectId.GenerateNewId().ToString();
@@ -166,6 +190,47 @@ public class ThumbnailService(IMongoDatabase db, AobaService aobaService)
 		}
 	}
 
+	public static Maybe<Stream> GenerateAvifThumbnail(Stream data, ThumbnailSize size, CancellationToken cancellationToken)
+	{
+		var w = (int)size;
+		var fn = ObjectId.GenerateNewId().ToString();
+		var inFilePath = $"/tmp/{fn}.avif";
+		var outFilePath = $"/tmp/{fn}.webp";
+		using var source = new FileStream(inFilePath, FileMode.CreateNew);
+		data.CopyTo(source);
+		source.Flush();
+		source.Dispose();
+		data.Dispose();
+		try
+		{
+			var process = Process.Start(new ProcessStartInfo
+			{
+				FileName = "vips",
+				Arguments = $"smartcrop \"{inFilePath}\" \"{outFilePath}\"[Q=75] {w} {w}",
+				WorkingDirectory = "/tmp"
+			});
+			if (process == null)
+				return new Error("Failed to run vips command");
+			process.WaitForExit();
+			if (process.ExitCode != 0)
+				return new Error("Failed to convert");
+			var output = new MemoryStream();
+			using var oFile = File.OpenRead(outFilePath);
+			oFile.CopyTo(output);
+			output.Position = 0;
+			return output;
+		}
+		catch(Exception ex)
+		{
+			return ex;
+		}
+		finally
+		{
+			File.Delete(inFilePath);
+			File.Delete(outFilePath);
+		}
+	}
+
 	public async Task<Maybe<Stream>> GenerateDocumentThumbnailAsync(Stream data, ThumbnailSize size, CancellationToken cancellationToken = default)
 	{
 		return new NotImplementedException();

AobaServer/Dockerfile

@@ -32,7 +32,7 @@ RUN dx bundle --platform web
 # Server Build
 # This stage is used when running from VS in fast mode (Default for Debug configuration)
 FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
-RUN apt-get update && apt-get install -y ffmpeg
+RUN apt-get update && apt-get install -y ffmpeg #libvips libvips-tools
 USER $APP_UID
 WORKDIR /app
 EXPOSE 8080

AobaServer/Program.cs

@@ -121,6 +121,9 @@ builder.Services.AddAuthentication(options =>
 
 
 builder.Services.AddAoba();
+#if DEBUG
+builder.Services.AddHostedService<DebugService>();
+#endif
 builder.Services.Configure<FormOptions>(opt =>
 {
 	opt.ValueLengthLimit = int.MaxValue;

AobaServer/Services/DebugService.cs

@@ -0,0 +1,19 @@
+
+using AobaCore.Services;
+
+namespace AobaServer.Services;
+
+public class DebugService(AobaService aobaService, ThumbnailService thumbnailService) : BackgroundService
+{
+	protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+	{
+		var mediaItems = await aobaService.FindMediaWithExtAsync(".avif", stoppingToken);
+		foreach (var item in mediaItems)
+		{
+			foreach (var size in item.Thumbnails.Keys)
+			{
+				await thumbnailService.DeleteThumbnailAsync(item.MediaId, size);
+			}
+		}
+	}
+}