Fix empty torrents (#11)

* fixed unwanted deletion of torrents in downloading metadata state

* refactored jobs code

* updated arr test data

* updated gitignore

* updated test configuration and removed dispensable files

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

@@ -49,7 +49,8 @@ public sealed class DelugeService : IDownloadService
             _logger.LogDebug(exception, "failed to find torrent {hash} in the download client", hash);
         }
 
-        if (contents is null)
+        // if no files found, torrent might be stuck in Downloading metadata
+        if (contents?.Contents?.Count is null or 0)
         {
             return false;
         }

code/Infrastructure/Verticals/DownloadClient/QBittorrent/QBitService.cs

@@ -53,18 +53,14 @@ public sealed class QBitService : IDownloadService
 
         IReadOnlyList<TorrentContent>? files = await _client.GetTorrentContentsAsync(hash);
 
-        if (files is null)
+        // if no files found, torrent might be stuck in Downloading metadata
+        if (files?.Count is null or 0)
         {
             return false;
         }
-        
-        // if all files are marked as skip
-        if (files.All(x => x.Priority is TorrentContentPriority.Skip))
-        {
-            return true;
-        }
 
-        return false;
+        // if all files are marked as skip
+        return files.All(x => x.Priority is TorrentContentPriority.Skip);
     }
 
     public async Task BlockUnwantedFilesAsync(string hash)

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

@@ -41,7 +41,8 @@ public sealed class TransmissionService : IDownloadService
     {
         TorrentInfo? torrent = await GetTorrentAsync(hash);
 
-        if (torrent is null)
+        // if no files found, torrent might be stuck in Downloading metadata
+        if (torrent?.FileStats?.Length is null or 0)
         {
             return false;
         }