Untested code to get a cached SeedCriteria by infohash to rtorrent handler

src/NzbDrone.Core/Download/Clients/rTorrent/RTorrent.cs

@@ -22,6 +22,7 @@ public class RTorrent : TorrentClientBase<RTorrentSettings>
     {
         private readonly IRTorrentProxy _proxy;
         private readonly IRTorrentDirectoryValidator _rTorrentDirectoryValidator;
+        private readonly IDownloadSeedConfigProvider _downloadSeedConfigProvider;
 
         public RTorrent(IRTorrentProxy proxy,
                         ITorrentFileInfoReader torrentFileInfoReader,
@@ -29,12 +30,14 @@ public RTorrent(IRTorrentProxy proxy,
                         IConfigService configService,
                         IDiskProvider diskProvider,
                         IRemotePathMappingService remotePathMappingService,
+                        IDownloadSeedConfigProvider downloadSeedConfigProvider,
                         IRTorrentDirectoryValidator rTorrentDirectoryValidator,
                         Logger logger)
             : base(torrentFileInfoReader, httpClient, configService, diskProvider, remotePathMappingService, logger)
         {
             _proxy = proxy;
             _rTorrentDirectoryValidator = rTorrentDirectoryValidator;
+            _downloadSeedConfigProvider = downloadSeedConfigProvider;
         }
 
         public override void MarkItemAsImported(DownloadClientItem downloadClientItem)
@@ -53,6 +56,8 @@ public override void MarkItemAsImported(DownloadClientItem downloadClientItem)
                         Settings.TvImportedCategory, downloadClientItem.Title);
                 }
             }
+
+            // TODO: Set post-import view
         }
 
         protected override string AddFromMagnetLink(RemoteEpisode remoteEpisode, string hash, string magnetLink)
@@ -147,6 +152,9 @@ public override IEnumerable<DownloadClientItem> GetItems()
                     item.Status = DownloadItemStatus.Paused;
                 }
 
+                var seedConfig = _downloadSeedConfigProvider.GetSeedConfiguration(torrent.Hash);
+                // TODO: Handle
+
                 // No stop ratio data is present, so do not delete
                 item.CanMoveFiles = item.CanBeRemoved = false;
 

src/NzbDrone.Core/Download/DownloadSeedConfigProvider.cs

@@ -0,0 +1,79 @@
+using System;
+using NLog;
+using NzbDrone.Common.Cache;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Download.Clients;
+using NzbDrone.Core.Download.History;
+using NzbDrone.Core.Indexers;
+
+namespace NzbDrone.Core.Download
+{
+    public interface IDownloadSeedConfigProvider
+    {
+        TorrentSeedConfiguration GetSeedConfiguration(string infoHash);
+    }
+
+    public class DownloadSeedConfigProvider : IDownloadSeedConfigProvider
+    {
+        private readonly Logger _logger;
+        private readonly ISeedConfigProvider _indexerSeedConfigProvider;
+        private readonly IDownloadHistoryService _downloadHistoryService;
+
+        class CachedSeedConfiguration
+        {
+            public int IndexerId { get; set; }
+            public bool FullSeason { get; set; }
+        }
+
+        private readonly ICached<CachedSeedConfiguration> _cacheDownloads;
+
+        public DownloadSeedConfigProvider(IDownloadHistoryService downloadHistoryService, ISeedConfigProvider indexerSeedConfigProvider, ICacheManager cacheManager, Logger logger)
+        {
+            _logger = logger;
+            _indexerSeedConfigProvider = indexerSeedConfigProvider;
+            _downloadHistoryService = downloadHistoryService;
+
+            _cacheDownloads = cacheManager.GetRollingCache<CachedSeedConfiguration>(GetType(), "indexerByHash", TimeSpan.FromHours(1));
+        }
+
+        public TorrentSeedConfiguration GetSeedConfiguration(string infoHash)
+        {
+            if (infoHash.IsNullOrWhiteSpace()) return null;
+
+            infoHash = infoHash.ToUpper();
+
+            var cachedConfig = _cacheDownloads.Get(infoHash, () => FetchIndexer(infoHash));
+
+            if (cachedConfig == null) return null;
+
+            var seedConfig = _indexerSeedConfigProvider.GetSeedConfiguration(cachedConfig.IndexerId, cachedConfig.FullSeason);
+
+            return seedConfig;
+        }
+
+        private CachedSeedConfiguration FetchIndexer(string infoHash)
+        {
+            var historyItem = _downloadHistoryService.GetLatestDownloadHistoryItem(infoHash);
+
+            if (historyItem == null)
+            {
+                _logger.Debug("No download history item for infohash {0}, unable to provide seed configuration", infoHash);
+                return null;
+            }
+
+            var parsedEpisodeInfo = Parser.Parser.ParseTitle(historyItem.Release.Title);
+
+            if (parsedEpisodeInfo == null)
+            {
+                _logger.Debug("No parsed title in download history item item for infohash {0}, unable to provide seed configuration", infoHash);
+                return null;
+            }
+
+            return new CachedSeedConfiguration
+            {
+                IndexerId = historyItem.IndexerId,
+                FullSeason = parsedEpisodeInfo.FullSeason
+            };
+        }
+    }
+}

src/NzbDrone.Core/Indexers/SeedConfigProvider.cs

@@ -1,9 +1,8 @@
 using System;
-using System.Linq;
+using NzbDrone.Common.Cache;
-using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Datastore;
 using NzbDrone.Core.Download.Clients;
-using NzbDrone.Core.Indexers;
+using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.Parser.Model;
 
 namespace NzbDrone.Core.Indexers
@@ -11,15 +10,20 @@ namespace NzbDrone.Core.Indexers
     public interface ISeedConfigProvider
     {
         TorrentSeedConfiguration GetSeedConfiguration(RemoteEpisode release);
+        TorrentSeedConfiguration GetSeedConfiguration(int indexerId, bool fullSeason);
     }
 
-    public class SeedConfigProvider : ISeedConfigProvider
+    public class SeedConfigProvider : ISeedConfigProvider, IHandle<IndexerSettingUpdatedEvent>
     {
         private readonly IIndexerFactory _indexerFactory;
 
-        public SeedConfigProvider(IIndexerFactory indexerFactory)
+        private readonly ICached<SeedCriteriaSettings> _cache;
+
+        public SeedConfigProvider(IIndexerFactory indexerFactory, ICacheManager cacheManager)
         {
             _indexerFactory = indexerFactory;
+
+            _cache = cacheManager.GetRollingCache<SeedCriteriaSettings>(GetType(), "criteriaByIndexer", TimeSpan.FromHours(1));
         }
 
         public TorrentSeedConfiguration GetSeedConfiguration(RemoteEpisode remoteEpisode)
@@ -27,33 +31,49 @@ public TorrentSeedConfiguration GetSeedConfiguration(RemoteEpisode remoteEpisode
             if (remoteEpisode.Release.DownloadProtocol != DownloadProtocol.Torrent) return null;
             if (remoteEpisode.Release.IndexerId == 0) return null;
 
+            return GetSeedConfiguration(remoteEpisode.Release.IndexerId, remoteEpisode.ParsedEpisodeInfo.FullSeason);
+        }
+
+        public TorrentSeedConfiguration GetSeedConfiguration(int indexerId, bool fullSeason)
+        {
+            if (indexerId == 0) return null;
+
+            var seedCriteria = _cache.Get(indexerId.ToString(), () => FetchSeedCriteria(indexerId));
+
+            if (seedCriteria == null) return null;
+            
+            var seedConfig = new TorrentSeedConfiguration
+            {
+                Ratio = seedCriteria.SeedRatio
+            };
+
+            var seedTime = fullSeason ? seedCriteria.SeasonPackSeedTime : seedCriteria.SeedTime;
+            if (seedTime.HasValue)
+            {
+                seedConfig.SeedTime = TimeSpan.FromMinutes(seedTime.Value);
+            }
+
+            return seedConfig;
+        }
+
+        private SeedCriteriaSettings FetchSeedCriteria(int indexerId)
+        {
             try
             {
-                var indexer = _indexerFactory.Get(remoteEpisode.Release.IndexerId);
+                var indexer = _indexerFactory.Get(indexerId);
                 var torrentIndexerSettings = indexer.Settings as ITorrentIndexerSettings;
 
-                if (torrentIndexerSettings != null && torrentIndexerSettings.SeedCriteria != null)
+                return torrentIndexerSettings?.SeedCriteria;
-                {
-                    var seedConfig = new TorrentSeedConfiguration
-                    {
-                        Ratio = torrentIndexerSettings.SeedCriteria.SeedRatio
-                    };
-
-                    var seedTime = remoteEpisode.ParsedEpisodeInfo.FullSeason ? torrentIndexerSettings.SeedCriteria.SeasonPackSeedTime : torrentIndexerSettings.SeedCriteria.SeedTime;
-                    if (seedTime.HasValue)
-                    {
-                        seedConfig.SeedTime = TimeSpan.FromMinutes(seedTime.Value);
-                    }
-
-                    return seedConfig;
-                }
             }
             catch (ModelNotFoundException)
             {
                 return null;
             }
+        }
 
-            return null;
+        public void Handle(IndexerSettingUpdatedEvent message)
+        {
+            _cache.Clear();
         }
     }
 }