Add a retention timer for podcast

Jellyfin.Plugin.Jellypod/ScheduledTasks/PodcastUpdateTask.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Plugin.Jellypod.Models;
 using Jellyfin.Plugin.Jellypod.Services;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
@@ -117,7 +118,22 @@ public class PodcastUpdateTask : IScheduledTask
             }
 
             processedCount++;
-            progress.Report((double)processedCount / totalPodcasts * 100);
+            progress.Report((double)processedCount / totalPodcasts * 90 / 100);
+        }
+
+        // Run cleanup for expired episodes
+        _logger.LogInformation("Starting episode retention cleanup");
+        foreach (var podcast in podcasts)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+            try
+            {
+                await CleanupExpiredEpisodesAsync(podcast, cancellationToken).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Failed to cleanup expired episodes for: {Title}", podcast.Title);
+            }
         }
 
         progress.Report(100);
@@ -139,4 +155,78 @@ public class PodcastUpdateTask : IScheduledTask
             }
         };
     }
+
+    /// <summary>
+    /// Cleans up episodes that exceed the retention policy.
+    /// </summary>
+    /// <param name="podcast">The podcast to clean up.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>A task representing the asynchronous operation.</returns>
+    private async Task CleanupExpiredEpisodesAsync(Podcast podcast, CancellationToken cancellationToken)
+    {
+        var config = Plugin.Instance?.Configuration;
+
+        // Determine effective max age for this podcast
+        int effectiveMaxAgeDays;
+        if (podcast.MaxEpisodeAgeDays == -1)
+        {
+            // Per-podcast override: unlimited
+            return;
+        }
+        else if (podcast.MaxEpisodeAgeDays > 0)
+        {
+            // Per-podcast specific value
+            effectiveMaxAgeDays = podcast.MaxEpisodeAgeDays;
+        }
+        else
+        {
+            // Use global setting (podcast.MaxEpisodeAgeDays == 0)
+            effectiveMaxAgeDays = config?.MaxEpisodeAgeDays ?? 0;
+        }
+
+        // 0 means unlimited
+        if (effectiveMaxAgeDays <= 0)
+        {
+            return;
+        }
+
+        var cutoffDate = DateTime.UtcNow.AddDays(-effectiveMaxAgeDays);
+        var expiredEpisodes = podcast.Episodes
+            .Where(e => e.Status == EpisodeStatus.Downloaded
+                        && e.DownloadedDate.HasValue
+                        && e.DownloadedDate.Value < cutoffDate)
+            .ToList();
+
+        if (expiredEpisodes.Count == 0)
+        {
+            return;
+        }
+
+        _logger.LogInformation(
+            "Found {Count} expired episodes for {Podcast} (older than {Days} days)",
+            expiredEpisodes.Count,
+            podcast.Title,
+            effectiveMaxAgeDays);
+
+        foreach (var episode in expiredEpisodes)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            try
+            {
+                await _downloadService.DeleteEpisodeFileAsync(episode).ConfigureAwait(false);
+                _logger.LogDebug(
+                    "Deleted expired episode: {Title} (downloaded {Date})",
+                    episode.Title,
+                    episode.DownloadedDate);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Failed to delete expired episode: {Title}", episode.Title);
+            }
+        }
+
+        // Save changes to storage
+        await _storageService.UpdatePodcastAsync(podcast).ConfigureAwait(false);
+    }
 }