jellyfin-server/MediaBrowser.Providers/Subtitles/SubtitleManager.cs
2020-01-22 22:20:35 +01:00

374 lines
12 KiB
C#

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Controller.Subtitles;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Globalization;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Providers;
using Microsoft.Extensions.Logging;
using static MediaBrowser.Model.IO.IODefaults;
namespace MediaBrowser.Providers.Subtitles
{
public class SubtitleManager : ISubtitleManager
{
private ISubtitleProvider[] _subtitleProviders;
private readonly ILogger _logger;
private readonly IFileSystem _fileSystem;
private readonly ILibraryMonitor _monitor;
private readonly IMediaSourceManager _mediaSourceManager;
private ILocalizationManager _localization;
public SubtitleManager(
ILoggerFactory loggerFactory,
IFileSystem fileSystem,
ILibraryMonitor monitor,
IMediaSourceManager mediaSourceManager,
ILocalizationManager localizationManager)
{
_logger = loggerFactory.CreateLogger(nameof(SubtitleManager));
_fileSystem = fileSystem;
_monitor = monitor;
_mediaSourceManager = mediaSourceManager;
_localization = localizationManager;
}
/// <inheritdoc />
public event EventHandler<SubtitleDownloadFailureEventArgs> SubtitleDownloadFailure;
/// <inheritdoc />
public void AddParts(IEnumerable<ISubtitleProvider> subtitleProviders)
{
_subtitleProviders = subtitleProviders
.OrderBy(i => i is IHasOrder hasOrder ? hasOrder.Order : 0)
.ToArray();
}
/// <inheritdoc />
public async Task<RemoteSubtitleInfo[]> SearchSubtitles(SubtitleSearchRequest request, CancellationToken cancellationToken)
{
if (request.Language != null)
{
var culture = _localization.FindLanguageInfo(request.Language);
if (culture != null)
{
request.TwoLetterISOLanguageName = culture.TwoLetterISOLanguageName;
}
}
var contentType = request.ContentType;
var providers = _subtitleProviders
.Where(i => i.SupportedMediaTypes.Contains(contentType))
.Where(i => !request.DisabledSubtitleFetchers.Contains(i.Name, StringComparer.OrdinalIgnoreCase))
.OrderBy(i =>
{
var index = request.SubtitleFetcherOrder.ToList().IndexOf(i.Name);
return index == -1 ? int.MaxValue : index;
})
.ToArray();
// If not searching all, search one at a time until something is found
if (!request.SearchAllProviders)
{
foreach (var provider in providers)
{
try
{
var searchResults = await provider.Search(request, cancellationToken).ConfigureAwait(false);
var list = searchResults.ToArray();
if (list.Length > 0)
{
Normalize(list);
return list;
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error downloading subtitles from {Provider}", provider.Name);
}
}
return Array.Empty<RemoteSubtitleInfo>();
}
var tasks = providers.Select(async i =>
{
try
{
var searchResults = await i.Search(request, cancellationToken).ConfigureAwait(false);
var list = searchResults.ToArray();
Normalize(list);
return list;
}
catch (Exception ex)
{
_logger.LogError(ex, "Error downloading subtitles from {0}", i.Name);
return Array.Empty<RemoteSubtitleInfo>();
}
});
var results = await Task.WhenAll(tasks).ConfigureAwait(false);
return results.SelectMany(i => i).ToArray();
}
/// <inheritdoc />
public Task DownloadSubtitles(Video video, string subtitleId, CancellationToken cancellationToken)
{
var libraryOptions = BaseItem.LibraryManager.GetLibraryOptions(video);
return DownloadSubtitles(video, libraryOptions, subtitleId, cancellationToken);
}
/// <inheritdoc />
public async Task DownloadSubtitles(
Video video,
LibraryOptions libraryOptions,
string subtitleId,
CancellationToken cancellationToken)
{
var parts = subtitleId.Split(new[] { '_' }, 2);
var provider = GetProvider(parts.First());
var saveInMediaFolder = libraryOptions.SaveSubtitlesWithMedia;
try
{
var response = await GetRemoteSubtitles(subtitleId, cancellationToken).ConfigureAwait(false);
using (var stream = response.Stream)
using (var memoryStream = new MemoryStream())
{
await stream.CopyToAsync(memoryStream).ConfigureAwait(false);
memoryStream.Position = 0;
var savePaths = new List<string>();
var saveFileName = Path.GetFileNameWithoutExtension(video.Path) + "." + response.Language.ToLowerInvariant();
if (response.IsForced)
{
saveFileName += ".forced";
}
saveFileName += "." + response.Format.ToLowerInvariant();
if (saveInMediaFolder)
{
savePaths.Add(Path.Combine(video.ContainingFolderPath, saveFileName));
}
savePaths.Add(Path.Combine(video.GetInternalMetadataPath(), saveFileName));
await TrySaveToFiles(memoryStream, savePaths).ConfigureAwait(false);
}
}
catch (RateLimitExceededException)
{
throw;
}
catch (Exception ex)
{
SubtitleDownloadFailure?.Invoke(this, new SubtitleDownloadFailureEventArgs
{
Item = video,
Exception = ex,
Provider = provider.Name
});
throw;
}
}
private async Task TrySaveToFiles(Stream stream, List<string> savePaths)
{
Exception exceptionToThrow = null;
foreach (var savePath in savePaths)
{
_logger.LogInformation("Saving subtitles to {0}", savePath);
_monitor.ReportFileSystemChangeBeginning(savePath);
try
{
Directory.CreateDirectory(Path.GetDirectoryName(savePath));
using (var fs = new FileStream(savePath, FileMode.Create, FileAccess.Write, FileShare.Read, FileStreamBufferSize, true))
{
await stream.CopyToAsync(fs).ConfigureAwait(false);
}
return;
}
catch (Exception ex)
{
if (exceptionToThrow == null)
{
exceptionToThrow = ex;
}
}
finally
{
_monitor.ReportFileSystemChangeComplete(savePath, false);
}
stream.Position = 0;
}
if (exceptionToThrow != null)
{
throw exceptionToThrow;
}
}
/// <inheritdoc />
public Task<RemoteSubtitleInfo[]> SearchSubtitles(Video video, string language, bool? isPerfectMatch, CancellationToken cancellationToken)
{
if (video.VideoType != VideoType.VideoFile)
{
return Task.FromResult(Array.Empty<RemoteSubtitleInfo>());
}
VideoContentType mediaType;
if (video is Episode)
{
mediaType = VideoContentType.Episode;
}
else if (video is Movie)
{
mediaType = VideoContentType.Movie;
}
else
{
// These are the only supported types
return Task.FromResult(Array.Empty<RemoteSubtitleInfo>());
}
var request = new SubtitleSearchRequest
{
ContentType = mediaType,
IndexNumber = video.IndexNumber,
Language = language,
MediaPath = video.Path,
Name = video.Name,
ParentIndexNumber = video.ParentIndexNumber,
ProductionYear = video.ProductionYear,
ProviderIds = video.ProviderIds,
RuntimeTicks = video.RunTimeTicks,
IsPerfectMatch = isPerfectMatch ?? false
};
if (video is Episode episode)
{
request.IndexNumberEnd = episode.IndexNumberEnd;
request.SeriesName = episode.SeriesName;
}
return SearchSubtitles(request, cancellationToken);
}
private void Normalize(IEnumerable<RemoteSubtitleInfo> subtitles)
{
foreach (var sub in subtitles)
{
sub.Id = GetProviderId(sub.ProviderName) + "_" + sub.Id;
}
}
private string GetProviderId(string name)
{
return name.ToLowerInvariant().GetMD5().ToString("N", CultureInfo.InvariantCulture);
}
private ISubtitleProvider GetProvider(string id)
{
return _subtitleProviders.First(i => string.Equals(id, GetProviderId(i.Name)));
}
/// <inheritdoc />
public Task DeleteSubtitles(BaseItem item, int index)
{
var stream = _mediaSourceManager.GetMediaStreams(new MediaStreamQuery
{
Index = index,
ItemId = item.Id,
Type = MediaStreamType.Subtitle
}).First();
var path = stream.Path;
_monitor.ReportFileSystemChangeBeginning(path);
try
{
_fileSystem.DeleteFile(path);
}
finally
{
_monitor.ReportFileSystemChangeComplete(path, false);
}
return item.RefreshMetadata(CancellationToken.None);
}
/// <inheritdoc />
public Task<SubtitleResponse> GetRemoteSubtitles(string id, CancellationToken cancellationToken)
{
var parts = id.Split(new[] { '_' }, 2);
var provider = GetProvider(parts[0]);
id = parts.Last();
return provider.GetSubtitles(id, cancellationToken);
}
/// <inheritdoc />
public SubtitleProviderInfo[] GetSupportedProviders(BaseItem video)
{
VideoContentType mediaType;
if (video is Episode)
{
mediaType = VideoContentType.Episode;
}
else if (video is Movie)
{
mediaType = VideoContentType.Movie;
}
else
{
// These are the only supported types
return Array.Empty<SubtitleProviderInfo>();
}
return _subtitleProviders
.Where(i => i.SupportedMediaTypes.Contains(mediaType))
.Select(i => new SubtitleProviderInfo
{
Name = i.Name,
Id = GetProviderId(i.Name)
}).ToArray();
}
}
}