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using System;
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using System.Collections.Generic;
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using System.Linq;
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using NLog;
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using NzbDrone.Common.Cache;
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using NzbDrone.Common.Extensions;
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using NzbDrone.Core.History;
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using NzbDrone.Core.Messaging.Events;
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using NzbDrone.Core.Music;
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using NzbDrone.Core.Parser;
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namespace NzbDrone.Core.Download.TrackedDownloads
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{
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public interface ITrackedDownloadService
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{
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TrackedDownload Find(string downloadId);
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void StopTracking(string downloadId);
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void StopTracking(List<string> downloadIds);
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TrackedDownload TrackDownload(DownloadClientDefinition downloadClient, DownloadClientItem downloadItem);
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List<TrackedDownload> GetTrackedDownloads();
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void UpdateTrackable(List<TrackedDownload> trackedDownloads);
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}
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public class TrackedDownloadService : ITrackedDownloadService
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{
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private readonly IParsingService _parsingService;
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private readonly IHistoryService _historyService;
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private readonly IEventAggregator _eventAggregator;
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private readonly Logger _logger;
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private readonly ICached<TrackedDownload> _cache;
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public TrackedDownloadService(IParsingService parsingService,
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ICacheManager cacheManager,
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IHistoryService historyService,
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IEventAggregator eventAggregator,
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Logger logger)
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{
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_parsingService = parsingService;
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_historyService = historyService;
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_eventAggregator = eventAggregator;
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_cache = cacheManager.GetCache<TrackedDownload>(GetType());
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_logger = logger;
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}
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public TrackedDownload Find(string downloadId)
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{
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return _cache.Find(downloadId);
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}
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public void StopTracking(string downloadId)
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{
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var trackedDownload = _cache.Find(downloadId);
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_cache.Remove(downloadId);
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_eventAggregator.PublishEvent(new TrackedDownloadsRemovedEvent(new List<TrackedDownload> { trackedDownload }));
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}
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public void StopTracking(List<string> downloadIds)
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{
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var trackedDownloads = new List<TrackedDownload>();
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foreach (var downloadId in downloadIds)
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{
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var trackedDownload = _cache.Find(downloadId);
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_cache.Remove(downloadId);
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trackedDownloads.Add(trackedDownload);
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}
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_eventAggregator.PublishEvent(new TrackedDownloadsRemovedEvent(trackedDownloads));
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}
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public TrackedDownload TrackDownload(DownloadClientDefinition downloadClient, DownloadClientItem downloadItem)
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{
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var existingItem = Find(downloadItem.DownloadId);
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if (existingItem != null && existingItem.State != TrackedDownloadStage.Downloading)
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{
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LogItemChange(existingItem, existingItem.DownloadItem, downloadItem);
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existingItem.DownloadItem = downloadItem;
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existingItem.IsTrackable = true;
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return existingItem;
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}
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var trackedDownload = new TrackedDownload
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{
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DownloadClient = downloadClient.Id,
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DownloadItem = downloadItem,
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Protocol = downloadClient.Protocol,
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IsTrackable = true
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};
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try
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{
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var parsedAlbumInfo = Parser.Parser.ParseAlbumTitle(trackedDownload.DownloadItem.Title);
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var historyItems = _historyService.FindByDownloadId(downloadItem.DownloadId);
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if (parsedAlbumInfo != null)
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{
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trackedDownload.RemoteAlbum = _parsingService.Map(parsedAlbumInfo);
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}
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if (historyItems.Any())
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{
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var firstHistoryItem = historyItems.OrderByDescending(h => h.Date).First();
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trackedDownload.State = GetStateFromHistory(firstHistoryItem.EventType);
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var grabbedEvent = historyItems.FirstOrDefault(v => v.EventType == HistoryEventType.Grabbed);
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trackedDownload.Indexer = grabbedEvent?.Data["indexer"];
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if (parsedAlbumInfo == null ||
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trackedDownload.RemoteAlbum == null ||
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trackedDownload.RemoteAlbum.Artist == null ||
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trackedDownload.RemoteAlbum.Albums.Empty())
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{
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// Try parsing the original source title and if that fails, try parsing it as a special
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// TODO: Pass the TVDB ID and TVRage IDs in as well so we have a better chance for finding the item
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var historyArtist = firstHistoryItem.Artist;
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var historyAlbums = new List<Album> { firstHistoryItem.Album };
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parsedAlbumInfo = Parser.Parser.ParseAlbumTitle(firstHistoryItem.SourceTitle);
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if (parsedAlbumInfo != null)
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{
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trackedDownload.RemoteAlbum = _parsingService.Map(parsedAlbumInfo,
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firstHistoryItem.ArtistId,
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historyItems.Where(v => v.EventType == HistoryEventType.Grabbed).Select(h => h.AlbumId)
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.Distinct());
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}
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else
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{
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parsedAlbumInfo =
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Parser.Parser.ParseAlbumTitleWithSearchCriteria(firstHistoryItem.SourceTitle,
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historyArtist, historyAlbums);
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if (parsedAlbumInfo != null)
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{
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trackedDownload.RemoteAlbum = _parsingService.Map(parsedAlbumInfo,
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firstHistoryItem.ArtistId,
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historyItems.Where(v => v.EventType == HistoryEventType.Grabbed).Select(h => h.AlbumId)
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.Distinct());
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}
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}
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}
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}
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if (trackedDownload.RemoteAlbum == null)
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{
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_logger.Trace("No Album found for download '{0}', not tracking.", trackedDownload.DownloadItem.Title);
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return null;
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}
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}
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catch (Exception e)
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{
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_logger.Debug(e, "Failed to find album for " + downloadItem.Title);
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return null;
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}
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LogItemChange(trackedDownload, existingItem?.DownloadItem, trackedDownload.DownloadItem);
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_cache.Set(trackedDownload.DownloadItem.DownloadId, trackedDownload);
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return trackedDownload;
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}
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public List<TrackedDownload> GetTrackedDownloads()
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{
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return _cache.Values.ToList();
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}
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public void UpdateTrackable(List<TrackedDownload> trackedDownloads)
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{
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var untrackable = GetTrackedDownloads().ExceptBy(t => t.DownloadItem.DownloadId, trackedDownloads, t => t.DownloadItem.DownloadId, StringComparer.CurrentCulture).ToList();
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foreach (var trackedDownload in untrackable)
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{
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trackedDownload.IsTrackable = false;
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}
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}
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private void LogItemChange(TrackedDownload trackedDownload, DownloadClientItem existingItem, DownloadClientItem downloadItem)
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{
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if (existingItem == null ||
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existingItem.Status != downloadItem.Status ||
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existingItem.CanBeRemoved != downloadItem.CanBeRemoved ||
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existingItem.CanMoveFiles != downloadItem.CanMoveFiles)
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{
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_logger.Debug("Tracking '{0}:{1}': ClientState={2}{3} SonarrStage={4} Episode='{5}' OutputPath={6}.",
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downloadItem.DownloadClient, downloadItem.Title,
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downloadItem.Status, downloadItem.CanBeRemoved ? "" :
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downloadItem.CanMoveFiles ? " (busy)" : " (readonly)",
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trackedDownload.State,
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trackedDownload.RemoteAlbum?.ParsedAlbumInfo,
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downloadItem.OutputPath);
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}
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}
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private static TrackedDownloadStage GetStateFromHistory(HistoryEventType eventType)
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{
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switch (eventType)
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{
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case HistoryEventType.DownloadFolderImported:
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return TrackedDownloadStage.Imported;
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case HistoryEventType.DownloadFailed:
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return TrackedDownloadStage.DownloadFailed;
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default:
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return TrackedDownloadStage.Downloading;
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}
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}
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}
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}
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