add qbit housekeeping service to remove stale torrents (#193)

* Add housekeeping service to clean stale torrents

* version bump

src/qbit-collector/Extensions/ServiceCollectionExtensions.cs

@@ -18,6 +18,7 @@ public static class ServiceCollectionExtensions
         services.AddHttpClient();
         services.AddSingleton<ITrackersService, TrackersService>();
         services.AddHostedService<TrackersBackgroundService>();
+        services.AddHostedService<HousekeepingBackgroundService>();
 
         return services;
     }

src/qbit-collector/Features/Qbit/HousekeepingBackgroundService.cs

@@ -0,0 +1,52 @@
+namespace QBitCollector.Features.Qbit;
+
+public class HousekeepingBackgroundService(IQBittorrentClient client, ILogger<HousekeepingBackgroundService> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        logger.LogInformation("Service is Running.");
+
+        await DoWork();
+
+        using PeriodicTimer timer = new(TimeSpan.FromMinutes(2));
+
+        try
+        {
+            while (await timer.WaitForNextTickAsync(stoppingToken))
+            {
+                await DoWork();
+            }
+        }
+        catch (OperationCanceledException)
+        {
+            logger.LogInformation("Service stopping.");
+        }
+    }
+
+    private async Task DoWork()
+    {
+        try
+        {
+            logger.LogInformation("Cleaning Stale Entries in Qbit...");
+
+            var torrents = await client.GetTorrentListAsync();
+
+            foreach (var torrentInfo in torrents)
+            {
+                if (!(torrentInfo.AddedOn < DateTimeOffset.UtcNow.AddMinutes(-1)))
+                {
+                    continue;
+                }
+                
+                logger.LogInformation("Torrent [{InfoHash}] Identified as stale because was added at {AddedOn}", torrentInfo.Hash, torrentInfo.AddedOn);
+
+                await client.DeleteAsync(new[] {torrentInfo.Hash}, deleteDownloadedData: true);
+                logger.LogInformation("Cleaned up stale torrent: [{InfoHash}]", torrentInfo.Hash);
+            }
+        }
+        catch (Exception e)
+        {
+            logger.LogError(e, "Error cleaning up stale torrents this interval.");
+        }
+    }
+}