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using System;
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using System.IO;
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using System.Net;
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using NLog;
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using NzbDrone.Common.Disk;
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using NzbDrone.Common.Extensions;
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using NzbDrone.Core.Configuration;
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using NzbDrone.Core.Exceptions;
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using NzbDrone.Core.MediaFiles.Events;
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using NzbDrone.Core.Messaging;
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using NzbDrone.Core.Messaging.Events;
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using NzbDrone.Core.Music;
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using NzbDrone.Core.Music.Events;
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namespace NzbDrone.Core.MediaFiles
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{
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public interface IDeleteMediaFiles
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{
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void DeleteTrackFile(Artist artist, TrackFile trackFile);
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void DeleteTrackFile(TrackFile trackFile, string subfolder = "");
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}
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public class MediaFileDeletionService : IDeleteMediaFiles,
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IHandleAsync<ArtistsDeletedEvent>,
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IHandleAsync<AlbumDeletedEvent>,
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IHandle<TrackFileDeletedEvent>
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{
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private readonly IDiskProvider _diskProvider;
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private readonly IRecycleBinProvider _recycleBinProvider;
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private readonly IMediaFileService _mediaFileService;
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private readonly IArtistService _artistService;
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private readonly IConfigService _configService;
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private readonly IEventAggregator _eventAggregator;
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private readonly Logger _logger;
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public MediaFileDeletionService(IDiskProvider diskProvider,
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IRecycleBinProvider recycleBinProvider,
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IMediaFileService mediaFileService,
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IArtistService artistService,
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IConfigService configService,
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IEventAggregator eventAggregator,
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Logger logger)
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{
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_diskProvider = diskProvider;
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_recycleBinProvider = recycleBinProvider;
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_mediaFileService = mediaFileService;
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_artistService = artistService;
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_configService = configService;
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_eventAggregator = eventAggregator;
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_logger = logger;
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}
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public void DeleteTrackFile(Artist artist, TrackFile trackFile)
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{
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var fullPath = trackFile.Path;
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var rootFolder = _diskProvider.GetParentFolder(artist.Path);
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if (!_diskProvider.FolderExists(rootFolder))
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{
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_logger.Warn("Artist's root folder ({0}) doesn't exist.", rootFolder);
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throw new NzbDroneClientException(HttpStatusCode.Conflict, "Artist's root folder ({0}) doesn't exist.", rootFolder);
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}
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if (_diskProvider.GetDirectories(rootFolder).Empty())
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{
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_logger.Warn("Artist's root folder ({0}) is empty.", rootFolder);
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throw new NzbDroneClientException(HttpStatusCode.Conflict, "Artist's root folder ({0}) is empty.", rootFolder);
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}
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if (_diskProvider.FolderExists(artist.Path))
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{
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var subfolder = _diskProvider.GetParentFolder(artist.Path).GetRelativePath(_diskProvider.GetParentFolder(fullPath));
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DeleteTrackFile(trackFile, subfolder);
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}
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else
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{
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// delete from db even if the artist folder is missing
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_mediaFileService.Delete(trackFile, DeleteMediaFileReason.Manual);
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}
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}
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public void DeleteTrackFile(TrackFile trackFile, string subfolder = "")
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{
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var fullPath = trackFile.Path;
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if (_diskProvider.FileExists(fullPath))
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{
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_logger.Info("Deleting track file: {0}", fullPath);
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try
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{
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_recycleBinProvider.DeleteFile(fullPath, subfolder);
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}
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catch (Exception e)
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{
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_logger.Error(e, "Unable to delete track file");
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throw new NzbDroneClientException(HttpStatusCode.InternalServerError, "Unable to delete track file");
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}
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}
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// Delete the track file from the database to clean it up even if the file was already deleted
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_mediaFileService.Delete(trackFile, DeleteMediaFileReason.Manual);
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_eventAggregator.PublishEvent(new DeleteCompletedEvent());
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}
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public void HandleAsync(ArtistsDeletedEvent message)
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{
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if (message.DeleteFiles)
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{
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var artists = message.Artists;
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var allArtists = _artistService.AllArtistPaths();
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foreach (var artist in artists)
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{
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foreach (var s in allArtists)
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{
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if (s.Key == artist.Id)
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{
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continue;
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}
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if (artist.Path.IsParentPath(s.Value))
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{
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_logger.Error("Artist path: '{0}' is a parent of another artist, not deleting files.", artist.Path);
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return;
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}
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if (artist.Path.PathEquals(s.Value))
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{
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_logger.Error("Artist path: '{0}' is the same as another artist, not deleting files.", artist.Path);
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return;
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}
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}
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if (_diskProvider.FolderExists(artist.Path))
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{
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_recycleBinProvider.DeleteFolder(artist.Path);
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}
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}
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_eventAggregator.PublishEvent(new DeleteCompletedEvent());
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}
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}
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public void HandleAsync(AlbumDeletedEvent message)
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{
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if (message.DeleteFiles)
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{
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var files = _mediaFileService.GetFilesByAlbum(message.Album.Id);
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foreach (var file in files)
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{
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_recycleBinProvider.DeleteFile(file.Path);
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}
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_eventAggregator.PublishEvent(new DeleteCompletedEvent());
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}
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}
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[EventHandleOrder(EventHandleOrder.Last)]
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public void Handle(TrackFileDeletedEvent message)
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{
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if (message.Reason == DeleteMediaFileReason.Upgrade)
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{
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return;
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}
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if (_configService.DeleteEmptyFolders)
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{
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var artist = message.TrackFile.Artist.Value;
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var albumFolder = message.TrackFile.Path.GetParentPath();
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if (_diskProvider.GetFiles(artist.Path, SearchOption.AllDirectories).Empty())
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{
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_diskProvider.DeleteFolder(artist.Path, true);
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}
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else if (_diskProvider.GetFiles(albumFolder, SearchOption.AllDirectories).Empty())
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{
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_diskProvider.RemoveEmptySubfolders(albumFolder);
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}
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}
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}
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}
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}
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