fix compile error

AobaCore/Services/AobaService.cs

@@ -25,6 +25,11 @@ public class AobaService(IMongoDatabase db)
 		return await _media.Find(m => m.MediaId == id).FirstOrDefaultAsync(cancellationToken);
 	}
 
+	public async Task<List<Media>> GetMediaAsync(IEnumerable<ObjectId> ids, CancellationToken cancellationToken = default)
+	{
+		return await _media.Find(m => ids.Contains(m.MediaId)).ToListAsync(cancellationToken);
+	}
+
 	public async Task<PagedResult<Media>> FindMediaAsync(string? query, ObjectId userId, int page = 1, int pageSize = 100, CancellationToken cancellationToken = default)
 	{
 		var filters = new List<FilterDefinition<Media>>()

AobaCore/Services/ThumbnailService.cs

@@ -53,6 +53,23 @@ public class ThumbnailService(IMongoDatabase db, AobaService aobaService)
 		return null;
 	}
 
+	public async Task<Error?> DeleteThumbnailDirectAsync(ObjectId thumbnailId)
+	{
+		try
+		{
+			await _gridfs.DeleteAsync(thumbnailId);
+		}
+		catch (GridFSFileNotFoundException)
+		{
+			//Ignore if the file was not found (somehow already deleted)
+		}
+		catch (Exception e)
+		{
+			return new ExceptionError(e);
+		}
+		return null;
+	}
+
 	/// <summary>
 	///
 	/// </summary>

AobaServer/Services/AobaRpcService.cs

@@ -13,7 +13,7 @@ using System.Text.Json;
 
 namespace AobaServer.Services;
 
-public class AobaRpcService(AobaService aobaService, AccountsService accountsService, AuthConfigService authConfig) : AobaRpc.AobaRpcBase
+public class AobaRpcService(AobaService aobaService, ThumbnailService thumbnailService, AccountsService accountsService, AuthConfigService authConfig) : AobaRpc.AobaRpcBase
 {
 	public override async Task<MediaResponse> GetMedia(Id request, ServerCallContext context)
 	{
@@ -59,13 +59,30 @@ public class AobaRpcService(AobaService aobaService, AccountsService accountsSer
 
 	public override async Task<Empty> DeleteMedia(Id request, ServerCallContext context)
 	{
-		await aobaService.DeleteFileAsync(request.ToObjectId(), context.CancellationToken);
+		var media = await aobaService.GetMediaAsync(request.ToObjectId());
+		if (media == null)
+			return new Empty();
+		await aobaService.DeleteFileAsync(media.MediaId, context.CancellationToken);
+		foreach (var (_, id) in media.Thumbnails)
+		{
+			await thumbnailService.DeleteThumbnailDirectAsync(id);
+		}
 		return new Empty();
 	}
 
 	public override async Task<Empty> DeleteMediaBulk(IdList request, ServerCallContext context)
 	{
+		var media = await aobaService.GetMediaAsync(request.ToObjectId(), context.CancellationToken);
+		if(media.Count == 0)
+			return new Empty();
 		await aobaService.DeleteFilesAsync(request.ToObjectId(), context.CancellationToken);
+		foreach (var item in media)
+		{
+			foreach (var (_, id) in item.Thumbnails)
+			{
+				await thumbnailService.DeleteThumbnailDirectAsync(id);
+			}
+		}
 		return new Empty();
 	}
 }

AobaServer/Services/DebugService.cs

@@ -8,5 +8,6 @@ public class DebugService(AobaService aobaService, ThumbnailService thumbnailSer
 {
 	protected override async Task ExecuteAsync(CancellationToken stoppingToken)
 	{
+		//todo: clean up orphaned thumbnails
 	}
 }