fixes #868 - Add scheduled task for missing subtitles

MediaBrowser.Providers/Manager/ProviderManager.cs

@@ -188,15 +188,10 @@ namespace MediaBrowser.Providers.Manager
                 if (preferredLanguages.Count > 0)
                 {
                     result = result.Where(i => string.IsNullOrEmpty(i.Language) ||
-                                               preferredLanguages.Contains(i.Language, StringComparer.OrdinalIgnoreCase));
+                                               preferredLanguages.Contains(i.Language, StringComparer.OrdinalIgnoreCase) ||
+                                               string.Equals(i.Language, "en", StringComparison.OrdinalIgnoreCase));
                 }
 
-                //if (string.Equals(preferredLanguage, "en", StringComparison.OrdinalIgnoreCase))
-                //{
-                //    result = result.Where(i => string.IsNullOrEmpty(i.Language) ||
-                //                               string.Equals(i.Language, "en", StringComparison.OrdinalIgnoreCase));
-                //}
-
                 return result;
             }
             catch (OperationCanceledException)

MediaBrowser.Providers/MediaBrowser.Providers.csproj

@@ -99,6 +99,7 @@
     <Compile Include="MediaInfo\FFProbeVideoInfo.cs" />
     <Compile Include="MediaInfo\SubtitleDownloader.cs" />
     <Compile Include="MediaInfo\SubtitleResolver.cs" />
+    <Compile Include="MediaInfo\SubtitleScheduledTask.cs" />
     <Compile Include="Movies\MovieDbTrailerProvider.cs" />
     <Compile Include="Movies\MovieExternalIds.cs" />
     <Compile Include="Movies\TrailerMetadataService.cs" />

MediaBrowser.Providers/MediaInfo/SubtitleScheduledTask.cs

@@ -0,0 +1,127 @@
+using MediaBrowser.Common.ScheduledTasks;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using MediaBrowser.Controller.Entities.TV;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Subtitles;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Providers.MediaInfo
+{
+    public class SubtitleScheduledTask : IScheduledTask
+    {
+        private readonly ILibraryManager _libraryManager;
+        private readonly IServerConfigurationManager _config;
+        private readonly ISubtitleManager _subtitleManager;
+        private readonly ILogger _logger;
+
+        public SubtitleScheduledTask(ILibraryManager libraryManager, IServerConfigurationManager config, ISubtitleManager subtitleManager, ILogger logger)
+        {
+            _libraryManager = libraryManager;
+            _config = config;
+            _subtitleManager = subtitleManager;
+            _logger = logger;
+        }
+
+        public string Name
+        {
+            get { return "Download missing subtitles"; }
+        }
+
+        public string Description
+        {
+            get { return "Searches the internet for missing subtitles based on metadata configuration."; }
+        }
+
+        public string Category
+        {
+            get { return "Library"; }
+        }
+
+        public async Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
+        {
+            var videos = _libraryManager.RootFolder
+                .RecursiveChildren
+                .OfType<Video>()
+                .Where(i =>
+                {
+                    if (i.LocationType == LocationType.Remote || i.LocationType == LocationType.Virtual)
+                    {
+                        return false;
+                    }
+
+                    return (_config.Configuration.SubtitleOptions.DownloadEpisodeSubtitles &&
+                            i is Episode) ||
+                           (_config.Configuration.SubtitleOptions.DownloadMovieSubtitles &&
+                            i is Movie);
+                })
+                .ToList();
+
+            var numComplete = 0;
+
+            foreach (var video in videos)
+            {
+                try
+                {
+                    await DownloadSubtitles(video, cancellationToken).ConfigureAwait(false);
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error downloading subtitles for {0}", ex, video.Path);
+                }
+
+                // Update progress
+                numComplete++;
+                double percent = numComplete;
+                percent /= videos.Count;
+
+                progress.Report(100 * percent);
+            }
+        }
+
+        private async Task DownloadSubtitles(Video video, CancellationToken cancellationToken)
+        {
+            if ((_config.Configuration.SubtitleOptions.DownloadEpisodeSubtitles &&
+                video is Episode) ||
+                (_config.Configuration.SubtitleOptions.DownloadMovieSubtitles &&
+                video is Movie))
+            {
+                var mediaStreams = video.GetMediaSources(false).First().MediaStreams;
+
+                var externalSubtitleStreams = mediaStreams.Where(i => i.Type == MediaStreamType.Subtitle && i.IsExternal).ToList();
+                var currentStreams = mediaStreams.Except(externalSubtitleStreams).ToList();
+
+                var downloadedLanguages = await new SubtitleDownloader(_logger,
+                    _subtitleManager)
+                    .DownloadSubtitles(video,
+                    currentStreams,
+                    externalSubtitleStreams,
+                    _config.Configuration.SubtitleOptions.SkipIfGraphicalSubtitlesPresent,
+                    _config.Configuration.SubtitleOptions.SkipIfAudioTrackMatches,
+                    _config.Configuration.SubtitleOptions.DownloadLanguages,
+                    cancellationToken).ConfigureAwait(false);
+
+                // Rescan
+                if (downloadedLanguages.Count > 0)
+                {
+                    await video.RefreshMetadata(cancellationToken).ConfigureAwait(false);
+                }
+            }
+        }
+
+        public IEnumerable<ITaskTrigger> GetDefaultTriggers()
+        {
+            return new ITaskTrigger[]
+                {
+                    new DailyTrigger { TimeOfDay = TimeSpan.FromHours(3) },
+                };
+        }
+    }
+}