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#pragma warning disable CS1591
using System;
using System.Collections.Generic;
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.Providers;
using MediaBrowser.Controller.Subtitles;
using MediaBrowser.Model.Entities;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.Providers.MediaInfo
{
public class SubtitleDownloader
{
private readonly ILogger _logger;
private readonly ISubtitleManager _subtitleManager;
public SubtitleDownloader(ILogger logger, ISubtitleManager subtitleManager)
{
_logger = logger;
_subtitleManager = subtitleManager;
}
public async Task<List<string>> DownloadSubtitles(
Video video,
List<MediaStream> mediaStreams,
bool skipIfEmbeddedSubtitlesPresent,
bool skipIfAudioTrackMatches,
bool requirePerfectMatch,
IEnumerable<string> languages,
string[] disabledSubtitleFetchers,
string[] subtitleFetcherOrder,
CancellationToken cancellationToken)
{
var downloadedLanguages = new List<string>();
foreach (var lang in languages)
{
var downloaded = await DownloadSubtitles(
video,
mediaStreams,
skipIfEmbeddedSubtitlesPresent,
skipIfAudioTrackMatches,
requirePerfectMatch,
lang,
disabledSubtitleFetchers,
subtitleFetcherOrder,
cancellationToken).ConfigureAwait(false);
if (downloaded)
{
downloadedLanguages.Add(lang);
}
}
return downloadedLanguages;
}
public Task<bool> DownloadSubtitles(
Video video,
List<MediaStream> mediaStreams,
bool skipIfEmbeddedSubtitlesPresent,
bool skipIfAudioTrackMatches,
bool requirePerfectMatch,
string lang,
string[] disabledSubtitleFetchers,
string[] subtitleFetcherOrder,
CancellationToken cancellationToken)
{
if (video.VideoType != VideoType.VideoFile)
{
return Task.FromResult(false);
}
if (!video.IsCompleteMedia)
{
return Task.FromResult(false);
}
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(false);
}
return DownloadSubtitles(
video,
mediaStreams,
skipIfEmbeddedSubtitlesPresent,
skipIfAudioTrackMatches,
requirePerfectMatch,
lang,
disabledSubtitleFetchers,
subtitleFetcherOrder,
mediaType,
cancellationToken);
}
private async Task<bool> DownloadSubtitles(
Video video,
List<MediaStream> mediaStreams,
bool skipIfEmbeddedSubtitlesPresent,
bool skipIfAudioTrackMatches,
bool requirePerfectMatch,
string language,
string[] disabledSubtitleFetchers,
string[] subtitleFetcherOrder,
VideoContentType mediaType,
CancellationToken cancellationToken)
{
// There's already subtitles for this language
if (mediaStreams.Any(i => i.Type == MediaStreamType.Subtitle && i.IsTextSubtitleStream && string.Equals(i.Language, language, StringComparison.OrdinalIgnoreCase)))
{
return false;
}
var audioStreams = mediaStreams.Where(i => i.Type == MediaStreamType.Audio).ToList();
var defaultAudioStreams = audioStreams.Where(i => i.IsDefault).ToList();
// If none are marked as default, just take a guess
if (defaultAudioStreams.Count == 0)
{
defaultAudioStreams = audioStreams.Take(1).ToList();
}
// There's already a default audio stream for this language
if (skipIfAudioTrackMatches &&
defaultAudioStreams.Any(i => string.Equals(i.Language, language, StringComparison.OrdinalIgnoreCase)))
{
return false;
}
// There's an internal subtitle stream for this language
if (skipIfEmbeddedSubtitlesPresent &&
mediaStreams.Any(i => i.Type == MediaStreamType.Subtitle && !i.IsExternal && string.Equals(i.Language, language, StringComparison.OrdinalIgnoreCase)))
{
return false;
}
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,
// Stop as soon as we find something
SearchAllProviders = false,
IsPerfectMatch = requirePerfectMatch,
DisabledSubtitleFetchers = disabledSubtitleFetchers,
SubtitleFetcherOrder = subtitleFetcherOrder
};
if (video is Episode episode)
{
request.IndexNumberEnd = episode.IndexNumberEnd;
request.SeriesName = episode.SeriesName;
}
try
{
var searchResults = await _subtitleManager.SearchSubtitles(request, cancellationToken).ConfigureAwait(false);
var result = searchResults.FirstOrDefault();
if (result != null)
{
await _subtitleManager.DownloadSubtitles(video, result.Id, cancellationToken).ConfigureAwait(false);
return true;
}
}
catch (RateLimitExceededException)
{
}
catch (Exception ex)
{
_logger.LogError(ex, "Error downloading subtitles");
}
return false;
}
}
}
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