fixed missing methods

code/Infrastructure.Tests/Verticals/DownloadClient/TestDownloadService.cs

@@ -42,8 +42,9 @@ public class TestDownloadService : DownloadService
         ConcurrentBag<string> patterns, ConcurrentBag<Regex> regexes) => Task.FromResult(new BlockFilesResult());
     public override Task DeleteDownload(string hash) => Task.CompletedTask;
     public override Task CreateCategoryAsync(string name) => Task.CompletedTask;
-    public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories) => Task.FromResult<List<object>?>(null);
+    public override Task<List<object>?> GetSeedingDownloads() => Task.FromResult<List<object>?>(null);
-    public override List<object>? FilterDownloadsToChangeCategoryAsync(List<object>? downloads, List<string> categories) => Task.FromResult<List<object>?>(null);
+    public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories) => null;
+    public override List<object>? FilterDownloadsToChangeCategoryAsync(List<object>? downloads, List<string> categories) => null;
     public override Task CleanDownloadsAsync(List<object>? downloads, List<CleanCategory> categoriesToClean, HashSet<string> excludedHashes) => Task.CompletedTask;
     public override Task ChangeCategoryForNoHardLinksAsync(List<object>? downloads, HashSet<string> excludedHashes) => Task.CompletedTask;
     

code/Infrastructure/Verticals/DownloadCleaner/DownloadCleaner.cs

@@ -89,6 +89,9 @@ public sealed class DownloadCleaner : GenericHandler
         
         List<object>? downloadsToClean = _downloadService.FilterDownloadsToBeCleanedAsync(downloads, _config.Categories);
         
+        // release unused objects
+        downloads = null;
+        
         _logger.LogTrace("looking for downloads clean");
         await _downloadService.CleanDownloadsAsync(downloadsToClean, _config.Categories, _excludedHashes);
     }

code/Infrastructure/Verticals/DownloadClient/Deluge/DelugeService.cs

@@ -196,11 +196,19 @@ public class DelugeService : DownloadService, IDelugeService
         return result;
     }
 
-    public override async List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    public override async Task<List<object>?> GetSeedingDownloads()
     {
         return (await _client.GetStatusForAllTorrents())
             ?.Where(x => !string.IsNullOrEmpty(x.Hash))
             .Where(x => x.State?.Equals("seeding", StringComparison.InvariantCultureIgnoreCase) is true)
+            .Cast<object>()
+            .ToList();
+    }
+
+    public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    {
+        return downloads
+            ?.Cast<TorrentStatus>()
             .Where(x => categories.Any(cat => cat.Name.Equals(x.Label, StringComparison.InvariantCultureIgnoreCase)))
             .Cast<object>()
             .ToList();

code/Infrastructure/Verticals/DownloadClient/DummyDownloadService.cs

@@ -53,6 +53,11 @@ public class DummyDownloadService : DownloadService
         throw new NotImplementedException();
     }
 
+    public override Task<List<object>?> GetSeedingDownloads()
+    {
+        throw new NotImplementedException();
+    }
+
     public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
     {
         throw new NotImplementedException();

code/Infrastructure/Verticals/DownloadClient/Transmission/TransmissionService.cs

@@ -182,8 +182,7 @@ public class TransmissionService : DownloadService, ITransmissionService
         return result;
     }
     
-    /// <inheritdoc/>
+    public override async Task<List<object>?> GetSeedingDownloads()
-    public override async List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
     {
         string[] fields = [
             TorrentFields.FILES,
@@ -204,6 +203,16 @@ public class TransmissionService : DownloadService, ITransmissionService
             ?.Torrents
             ?.Where(x => !string.IsNullOrEmpty(x.HashString))
             .Where(x => x.Status is 5 or 6)
+            .Cast<object>()
+            .ToList();
+    }
+
+    /// <inheritdoc/>
+    public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    {
+        return downloads
+            ?
+            .Cast<TorrentInfo>()
             .Where(x => categories
                 .Any(cat =>
                 {