Merge branch 'master' into defer_image_fetching

12 files changed, 115 insertions, 101 deletions

diff --git a/Emby.Server.Implementations/Library/LibraryManager.cs b/Emby.Server.Implementations/Library/LibraryManager.cs
index 74788a320..013781258 100644
--- a/Emby.Server.Implementations/Library/LibraryManager.cs
+++ b/Emby.Server.Implementations/Library/LibraryManager.cs
@@ -6,6 +6,7 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Net;
+using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
 using Emby.Naming.Audio;
@@ -1516,7 +1517,7 @@ namespace Emby.Server.Implementations.Library
         {
             if (query.AncestorIds.Length == 0 &&
                 query.ParentId.Equals(Guid.Empty) &&
-                query.ChannelIds.Length == 0 &&
+                query.ChannelIds.Count == 0 &&
                 query.TopParentIds.Length == 0 &&
                 string.IsNullOrEmpty(query.AncestorWithPresentationUniqueKey) &&
                 string.IsNullOrEmpty(query.SeriesPresentationUniqueKey) &&
@@ -2459,6 +2460,21 @@ namespace Emby.Server.Implementations.Library
             new SubtitleResolver(BaseItem.LocalizationManager).AddExternalSubtitleStreams(streams, videoPath, streams.Count, files);
         }
 
+        public BaseItem GetParentItem(string parentId, Guid? userId)
+        {
+            if (!string.IsNullOrEmpty(parentId))
+            {
+                return GetItemById(new Guid(parentId));
+            }
+
+            if (userId.HasValue && userId != Guid.Empty)
+            {
+                return GetUserRootFolder();
+            }
+
+            return RootFolder;
+        }
+
         /// <inheritdoc />
         public bool IsVideoFile(string path)
         {
@@ -2489,9 +2505,10 @@ namespace Emby.Server.Implementations.Library
 
             var isFolder = episode.VideoType == VideoType.BluRay || episode.VideoType == VideoType.Dvd;
 
+            // TODO nullable - what are we trying to do there with empty episodeInfo?
             var episodeInfo = episode.IsFileProtocol
-                ? resolver.Resolve(episode.Path, isFolder, null, null, isAbsoluteNaming) ?? new Naming.TV.EpisodeInfo()
-                : new Naming.TV.EpisodeInfo();
+                ? resolver.Resolve(episode.Path, isFolder, null, null, isAbsoluteNaming) ?? new Naming.TV.EpisodeInfo(episode.Path)
+                : new Naming.TV.EpisodeInfo(episode.Path);
 
             try
             {
@@ -2580,12 +2597,12 @@ namespace Emby.Server.Implementations.Library
 
                 if (!episode.IndexNumberEnd.HasValue || forceRefresh)
                 {
-                    if (episode.IndexNumberEnd != episodeInfo.EndingEpsiodeNumber)
+                    if (episode.IndexNumberEnd != episodeInfo.EndingEpisodeNumber)
                     {
                         changed = true;
                     }
 
-                    episode.IndexNumberEnd = episodeInfo.EndingEpsiodeNumber;
+                    episode.IndexNumberEnd = episodeInfo.EndingEpisodeNumber;
                 }
 
                 if (!episode.ParentIndexNumber.HasValue || forceRefresh)
@@ -2709,7 +2726,7 @@ namespace Emby.Server.Implementations.Library
 
             var videos = videoListResolver.Resolve(fileSystemChildren);
 
-            var currentVideo = videos.FirstOrDefault(i => string.Equals(owner.Path, i.Files.First().Path, StringComparison.OrdinalIgnoreCase));
+            var currentVideo = videos.FirstOrDefault(i => string.Equals(owner.Path, i.Files[0].Path, StringComparison.OrdinalIgnoreCase));
 
             if (currentVideo != null)
             {
@@ -2911,7 +2928,7 @@ namespace Emby.Server.Implementations.Library
 
                     return item.GetImageInfo(image.Type, imageIndex);
                 }
-                catch (HttpException ex)
+                catch (HttpRequestException ex)
                 {
                     if (ex.StatusCode.HasValue
                         && (ex.StatusCode.Value == HttpStatusCode.NotFound || ex.StatusCode.Value == HttpStatusCode.Forbidden))
diff --git a/Emby.Server.Implementations/Library/MediaSourceManager.cs b/Emby.Server.Implementations/Library/MediaSourceManager.cs
index 67cf8bf5b..928f5f88e 100644
--- a/Emby.Server.Implementations/Library/MediaSourceManager.cs
+++ b/Emby.Server.Implementations/Library/MediaSourceManager.cs
@@ -1,6 +1,7 @@
 #pragma warning disable CS1591
 
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
@@ -43,7 +44,7 @@ namespace Emby.Server.Implementations.Library
         private readonly ILocalizationManager _localizationManager;
         private readonly IApplicationPaths _appPaths;
 
-        private readonly Dictionary<string, ILiveStream> _openStreams = new Dictionary<string, ILiveStream>(StringComparer.OrdinalIgnoreCase);
+        private readonly ConcurrentDictionary<string, ILiveStream> _openStreams = new ConcurrentDictionary<string, ILiveStream>(StringComparer.OrdinalIgnoreCase);
         private readonly SemaphoreSlim _liveStreamSemaphore = new SemaphoreSlim(1, 1);
 
         private IMediaSourceProvider[] _providers;
@@ -582,29 +583,20 @@ namespace Emby.Server.Implementations.Library
             mediaSource.InferTotalBitrate();
         }
 
-        public async Task<IDirectStreamProvider> GetDirectStreamProviderByUniqueId(string uniqueId, CancellationToken cancellationToken)
+        public Task<IDirectStreamProvider> GetDirectStreamProviderByUniqueId(string uniqueId, CancellationToken cancellationToken)
         {
-            await _liveStreamSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
-
-            try
+            var info = _openStreams.Values.FirstOrDefault(i =>
             {
-                var info = _openStreams.Values.FirstOrDefault(i =>
+                var liveStream = i as ILiveStream;
+                if (liveStream != null)
                 {
-                    var liveStream = i as ILiveStream;
-                    if (liveStream != null)
-                    {
-                        return string.Equals(liveStream.UniqueId, uniqueId, StringComparison.OrdinalIgnoreCase);
-                    }
+                    return string.Equals(liveStream.UniqueId, uniqueId, StringComparison.OrdinalIgnoreCase);
+                }
 
-                    return false;
-                });
+                return false;
+            });
 
-                return info as IDirectStreamProvider;
-            }
-            finally
-            {
-                _liveStreamSemaphore.Release();
-            }
+            return Task.FromResult(info as IDirectStreamProvider);
         }
 
         public async Task<LiveStreamResponse> OpenLiveStream(LiveStreamRequest request, CancellationToken cancellationToken)
@@ -793,29 +785,20 @@ namespace Emby.Server.Implementations.Library
             return new Tuple<MediaSourceInfo, IDirectStreamProvider>(info.MediaSource, info as IDirectStreamProvider);
         }
 
-        private async Task<ILiveStream> GetLiveStreamInfo(string id, CancellationToken cancellationToken)
+        private Task<ILiveStream> GetLiveStreamInfo(string id, CancellationToken cancellationToken)
         {
             if (string.IsNullOrEmpty(id))
             {
                 throw new ArgumentNullException(nameof(id));
             }
 
-            await _liveStreamSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
-
-            try
+            if (_openStreams.TryGetValue(id, out ILiveStream info))
             {
-                if (_openStreams.TryGetValue(id, out ILiveStream info))
-                {
-                    return info;
-                }
-                else
-                {
-                    throw new ResourceNotFoundException();
-                }
+                return Task.FromResult(info);
             }
-            finally
+            else
             {
-                _liveStreamSemaphore.Release();
+                return Task.FromException<ILiveStream>(new ResourceNotFoundException());
             }
         }
 
@@ -844,7 +827,7 @@ namespace Emby.Server.Implementations.Library
 
                     if (liveStream.ConsumerCount <= 0)
                     {
-                        _openStreams.Remove(id);
+                        _openStreams.TryRemove(id, out _);
 
                         _logger.LogInformation("Closing live stream {0}", id);
 
@@ -866,7 +849,7 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentException("Key can't be empty.", nameof(key));
             }
 
-            var keys = key.Split(new[] { LiveStreamIdDelimeter }, 2);
+            var keys = key.Split(LiveStreamIdDelimeter, 2);
 
             var provider = _providers.FirstOrDefault(i => string.Equals(i.GetType().FullName.GetMD5().ToString("N", CultureInfo.InvariantCulture), keys[0], StringComparison.OrdinalIgnoreCase));
 
diff --git a/Emby.Server.Implementations/Library/MediaStreamSelector.cs b/Emby.Server.Implementations/Library/MediaStreamSelector.cs
index 179e0ed98..28fa06239 100644
--- a/Emby.Server.Implementations/Library/MediaStreamSelector.cs
+++ b/Emby.Server.Implementations/Library/MediaStreamSelector.cs
@@ -101,7 +101,7 @@ namespace Emby.Server.Implementations.Library
 
         private static IEnumerable<MediaStream> GetSortedStreams(IEnumerable<MediaStream> streams, MediaStreamType type, string[] languagePreferences)
         {
-            // Give some preferance to external text subs for better performance
+            // Give some preference to external text subs for better performance
             return streams.Where(i => i.Type == type)
                 .OrderBy(i =>
             {
diff --git a/Emby.Server.Implementations/Library/MusicManager.cs b/Emby.Server.Implementations/Library/MusicManager.cs
index 877fdec86..658c53f28 100644
--- a/Emby.Server.Implementations/Library/MusicManager.cs
+++ b/Emby.Server.Implementations/Library/MusicManager.cs
@@ -49,7 +49,7 @@ namespace Emby.Server.Implementations.Library
             var genres = item
                .GetRecursiveChildren(user, new InternalItemsQuery(user)
                {
-                   IncludeItemTypes = new[] { typeof(Audio).Name },
+                   IncludeItemTypes = new[] { nameof(Audio) },
                    DtoOptions = dtoOptions
                })
                .Cast<Audio>()
@@ -86,7 +86,7 @@ namespace Emby.Server.Implementations.Library
         {
             return _libraryManager.GetItemList(new InternalItemsQuery(user)
             {
-                IncludeItemTypes = new[] { typeof(Audio).Name },
+                IncludeItemTypes = new[] { nameof(Audio) },
 
                 GenreIds = genreIds.ToArray(),
 
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
index 03059e6d3..2c4497c69 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
@@ -32,7 +32,8 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         /// <value>The priority.</value>
         public override ResolverPriority Priority => ResolverPriority.Fourth;
 
-        public MultiItemResolverResult ResolveMultiple(Folder parent,
+        public MultiItemResolverResult ResolveMultiple(
+            Folder parent,
             List<FileSystemMetadata> files,
             string collectionType,
             IDirectoryService directoryService)
@@ -50,7 +51,8 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
             return result;
         }
 
-        private MultiItemResolverResult ResolveMultipleInternal(Folder parent,
+        private MultiItemResolverResult ResolveMultipleInternal(
+            Folder parent,
             List<FileSystemMetadata> files,
             string collectionType,
             IDirectoryService directoryService)
@@ -199,7 +201,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                     continue;
                 }
 
-                var firstMedia = resolvedItem.Files.First();
+                var firstMedia = resolvedItem.Files[0];
 
                 var libraryItem = new T
                 {
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
index 79b6dded3..18ceb5e76 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
@@ -1,5 +1,8 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
 using Emby.Naming.Audio;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
@@ -113,52 +116,48 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
             IFileSystem fileSystem,
             ILibraryManager libraryManager)
         {
+            // check for audio files before digging down into directories
+            var foundAudioFile = list.Any(fileSystemInfo => !fileSystemInfo.IsDirectory && libraryManager.IsAudioFile(fileSystemInfo.FullName));
+            if (foundAudioFile)
+            {
+                // at least one audio file exists
+                return true;
+            }
+
+            if (!allowSubfolders)
+            {
+                // not music since no audio file exists and we're not looking into subfolders
+                return false;
+            }
+
             var discSubfolderCount = 0;
-            var notMultiDisc = false;
 
             var namingOptions = ((LibraryManager)_libraryManager).GetNamingOptions();
             var parser = new AlbumParser(namingOptions);
-            foreach (var fileSystemInfo in list)
+
+            var directories = list.Where(fileSystemInfo => fileSystemInfo.IsDirectory);
+
+            var result = Parallel.ForEach(directories, (fileSystemInfo, state) =>
             {
-                if (fileSystemInfo.IsDirectory)
+                var path = fileSystemInfo.FullName;
+                var hasMusic = ContainsMusic(directoryService.GetFileSystemEntries(path), false, directoryService, logger, fileSystem, libraryManager);
+
+                if (hasMusic)
                 {
-                    if (allowSubfolders)
+                    if (parser.IsMultiPart(path))
                     {
-                        if (notMultiDisc)
-                        {
-                            continue;
-                        }
-
-                        var path = fileSystemInfo.FullName;
-                        var hasMusic = ContainsMusic(directoryService.GetFileSystemEntries(path), false, directoryService, logger, fileSystem, libraryManager);
-
-                        if (hasMusic)
-                        {
-                            if (parser.IsMultiPart(path))
-                            {
-                                logger.LogDebug("Found multi-disc folder: " + path);
-                                discSubfolderCount++;
-                            }
-                            else
-                            {
-                                // If there are folders underneath with music that are not multidisc, then this can't be a multi-disc album
-                                notMultiDisc = true;
-                            }
-                        }
+                        logger.LogDebug("Found multi-disc folder: " + path);
+                        Interlocked.Increment(ref discSubfolderCount);
                     }
-                }
-                else
-                {
-                    var fullName = fileSystemInfo.FullName;
-
-                    if (libraryManager.IsAudioFile(fullName))
+                    else
                     {
-                        return true;
+                        // If there are folders underneath with music that are not multidisc, then this can't be a multi-disc album
+                        state.Stop();
                     }
                 }
-            }
+            });
 
-            if (notMultiDisc)
+            if (!result.IsCompleted)
             {
                 return false;
             }
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
index 5f5cd0e92..e9e688fa6 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Threading.Tasks;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
@@ -94,7 +95,18 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
             var albumResolver = new MusicAlbumResolver(_logger, _fileSystem, _libraryManager);
 
             // If we contain an album assume we are an artist folder
-            return args.FileSystemChildren.Where(i => i.IsDirectory).Any(i => albumResolver.IsMusicAlbum(i.FullName, directoryService)) ? new MusicArtist() : null;
+            var directories = args.FileSystemChildren.Where(i => i.IsDirectory);
+
+            var result = Parallel.ForEach(directories, (fileSystemInfo, state) =>
+            {
+                if (albumResolver.IsMusicAlbum(fileSystemInfo.FullName, directoryService))
+                {
+                    // stop once we see a music album
+                    state.Stop();
+                }
+            });
+
+            return !result.IsCompleted ? new MusicArtist() : null;
         }
     }
 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
index 86a5d8b7d..59af7ce8a 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
@@ -50,7 +50,8 @@ namespace Emby.Server.Implementations.Library.Resolvers.Books
                 var fileExtension = Path.GetExtension(f.FullName) ??
                                     string.Empty;
 
-                return _validExtensions.Contains(fileExtension,
+                return _validExtensions.Contains(
+                    fileExtension,
                                                 StringComparer
                                                     .OrdinalIgnoreCase);
             }).ToList();
diff --git a/Emby.Server.Implementations/Library/SearchEngine.cs b/Emby.Server.Implementations/Library/SearchEngine.cs
index 9a69bce0e..c850e3a08 100644
--- a/Emby.Server.Implementations/Library/SearchEngine.cs
+++ b/Emby.Server.Implementations/Library/SearchEngine.cs
@@ -87,61 +87,61 @@ namespace Emby.Server.Implementations.Library
             var excludeItemTypes = query.ExcludeItemTypes.ToList();
             var includeItemTypes = (query.IncludeItemTypes ?? Array.Empty<string>()).ToList();
 
-            excludeItemTypes.Add(typeof(Year).Name);
-            excludeItemTypes.Add(typeof(Folder).Name);
+            excludeItemTypes.Add(nameof(Year));
+            excludeItemTypes.Add(nameof(Folder));
 
             if (query.IncludeGenres && (includeItemTypes.Count == 0 || includeItemTypes.Contains("Genre", StringComparer.OrdinalIgnoreCase)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, typeof(Genre).Name);
-                    AddIfMissing(includeItemTypes, typeof(MusicGenre).Name);
+                    AddIfMissing(includeItemTypes, nameof(Genre));
+                    AddIfMissing(includeItemTypes, nameof(MusicGenre));
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, typeof(Genre).Name);
-                AddIfMissing(excludeItemTypes, typeof(MusicGenre).Name);
+                AddIfMissing(excludeItemTypes, nameof(Genre));
+                AddIfMissing(excludeItemTypes, nameof(MusicGenre));
             }
 
             if (query.IncludePeople && (includeItemTypes.Count == 0 || includeItemTypes.Contains("People", StringComparer.OrdinalIgnoreCase) || includeItemTypes.Contains("Person", StringComparer.OrdinalIgnoreCase)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, typeof(Person).Name);
+                    AddIfMissing(includeItemTypes, nameof(Person));
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, typeof(Person).Name);
+                AddIfMissing(excludeItemTypes, nameof(Person));
             }
 
             if (query.IncludeStudios && (includeItemTypes.Count == 0 || includeItemTypes.Contains("Studio", StringComparer.OrdinalIgnoreCase)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, typeof(Studio).Name);
+                    AddIfMissing(includeItemTypes, nameof(Studio));
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, typeof(Studio).Name);
+                AddIfMissing(excludeItemTypes, nameof(Studio));
             }
 
             if (query.IncludeArtists && (includeItemTypes.Count == 0 || includeItemTypes.Contains("MusicArtist", StringComparer.OrdinalIgnoreCase)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, typeof(MusicArtist).Name);
+                    AddIfMissing(includeItemTypes, nameof(MusicArtist));
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, typeof(MusicArtist).Name);
+                AddIfMissing(excludeItemTypes, nameof(MusicArtist));
             }
 
-            AddIfMissing(excludeItemTypes, typeof(CollectionFolder).Name);
-            AddIfMissing(excludeItemTypes, typeof(Folder).Name);
+            AddIfMissing(excludeItemTypes, nameof(CollectionFolder));
+            AddIfMissing(excludeItemTypes, nameof(Folder));
             var mediaTypes = query.MediaTypes.ToList();
 
             if (includeItemTypes.Count > 0)
diff --git a/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs b/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs
index d4c8c35e6..f9a3e2c64 100644
--- a/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs
+++ b/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs
@@ -81,7 +81,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var deadEntities = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { typeof(MusicArtist).Name },
+                IncludeItemTypes = new[] { nameof(MusicArtist) },
                 IsDeadArtist = true,
                 IsLocked = false
             }).Cast<MusicArtist>().ToList();
diff --git a/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs b/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs
index 8275c873a..8739a9e1b 100644
--- a/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs
+++ b/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs
@@ -91,7 +91,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var deadEntities = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { typeof(Person).Name },
+                IncludeItemTypes = new[] { nameof(Person) },
                 IsDeadPerson = true,
                 IsLocked = false
             });
diff --git a/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs b/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs
index ca35adfff..9a8c5f39d 100644
--- a/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs
+++ b/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs
@@ -80,7 +80,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var deadEntities = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { typeof(Studio).Name },
+                IncludeItemTypes = new[] { nameof(Studio) },
                 IsDeadStudio = true,
                 IsLocked = false
             });