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| #pragma warning disable CS1591using System;using System.Collections.Generic;using System.Globalization;using System.IO;using System.Linq;using System.Text;using System.Text.Json.Serialization;using System.Threading;using System.Threading.Tasks;using Jellyfin.Data.Entities;using Jellyfin.Data.Enums;using MediaBrowser.Common.Extensions;using MediaBrowser.Controller.Channels;using MediaBrowser.Controller.Configuration;using MediaBrowser.Controller.Dto;using MediaBrowser.Controller.Extensions;using MediaBrowser.Controller.Library;using MediaBrowser.Controller.Persistence;using MediaBrowser.Controller.Providers;using MediaBrowser.Model.Configuration;using MediaBrowser.Model.Dto;using MediaBrowser.Model.Entities;using MediaBrowser.Model.Globalization;using MediaBrowser.Model.IO;using MediaBrowser.Model.Library;using MediaBrowser.Model.LiveTv;using MediaBrowser.Model.MediaInfo;using MediaBrowser.Model.Providers;using Microsoft.Extensions.Logging;namespace MediaBrowser.Controller.Entities{    /// <summary>    /// Class BaseItem.    /// </summary>    public abstract class BaseItem : IHasProviderIds, IHasLookupInfo<ItemLookupInfo>, IEquatable<BaseItem>    {        /// <summary>        /// The supported image extensions.        /// </summary>        public static readonly string[] SupportedImageExtensions            = new[] { ".png", ".jpg", ".jpeg", ".tbn", ".gif" };        private static readonly List<string> _supportedExtensions = new List<string>(SupportedImageExtensions)        {            ".nfo",            ".xml",            ".srt",            ".vtt",            ".sub",            ".idx",            ".txt",            ".edl",            ".bif",            ".smi",            ".ttml"        };        protected BaseItem()        {            Tags = Array.Empty<string>();            Genres = Array.Empty<string>();            Studios = Array.Empty<string>();            ProviderIds = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);            LockedFields = Array.Empty<MetadataField>();            ImageInfos = Array.Empty<ItemImageInfo>();            ProductionLocations = Array.Empty<string>();            RemoteTrailers = Array.Empty<MediaUrl>();            ExtraIds = Array.Empty<Guid>();        }        public static readonly char[] SlugReplaceChars = { '?', '/', '&' };        public static char SlugChar = '-';        /// <summary>        /// The trailer folder name.        /// </summary>        public const string TrailerFolderName = "trailers";        public const string ThemeSongsFolderName = "theme-music";        public const string ThemeSongFilename = "theme";        public const string ThemeVideosFolderName = "backdrops";        public const string ExtrasFolderName = "extras";        public const string BehindTheScenesFolderName = "behind the scenes";        public const string DeletedScenesFolderName = "deleted scenes";        public const string InterviewFolderName = "interviews";        public const string SceneFolderName = "scenes";        public const string SampleFolderName = "samples";        public const string ShortsFolderName = "shorts";        public const string FeaturettesFolderName = "featurettes";        public static readonly string[] AllExtrasTypesFolderNames = {            ExtrasFolderName,            BehindTheScenesFolderName,            DeletedScenesFolderName,            InterviewFolderName,            SceneFolderName,            SampleFolderName,            ShortsFolderName,            FeaturettesFolderName        };        [JsonIgnore]        public Guid[] ThemeSongIds        {            get            {                if (_themeSongIds == null)                {                    _themeSongIds = GetExtras()                        .Where(extra => extra.ExtraType == Model.Entities.ExtraType.ThemeSong)                        .Select(song => song.Id)                        .ToArray();                }                return _themeSongIds;            }            private set            {                _themeSongIds = value;            }        }        [JsonIgnore]        public Guid[] ThemeVideoIds        {            get            {                if (_themeVideoIds == null)                {                    _themeVideoIds = GetExtras()                        .Where(extra => extra.ExtraType == Model.Entities.ExtraType.ThemeVideo)                        .Select(song => song.Id)                        .ToArray();                }                return _themeVideoIds;            }            private set            {                _themeVideoIds = value;            }        }        [JsonIgnore]        public string PreferredMetadataCountryCode { get; set; }        [JsonIgnore]        public string PreferredMetadataLanguage { get; set; }        public long? Size { get; set; }        public string Container { get; set; }        [JsonIgnore]        public string Tagline { get; set; }        [JsonIgnore]        public virtual ItemImageInfo[] ImageInfos { get; set; }        [JsonIgnore]        public bool IsVirtualItem { get; set; }        /// <summary>        /// Gets or sets the album.        /// </summary>        /// <value>The album.</value>        [JsonIgnore]        public string Album { get; set; }        /// <summary>        /// Gets or sets the channel identifier.        /// </summary>        /// <value>The channel identifier.</value>        [JsonIgnore]        public Guid ChannelId { get; set; }        [JsonIgnore]        public virtual bool SupportsAddingToPlaylist => false;        [JsonIgnore]        public virtual bool AlwaysScanInternalMetadataPath => false;        /// <summary>        /// Gets a value indicating whether this instance is in mixed folder.        /// </summary>        /// <value><c>true</c> if this instance is in mixed folder; otherwise, <c>false</c>.</value>        [JsonIgnore]        public bool IsInMixedFolder { get; set; }        [JsonIgnore]        public virtual bool SupportsPlayedStatus => false;        [JsonIgnore]        public virtual bool SupportsPositionTicksResume => false;        [JsonIgnore]        public virtual bool SupportsRemoteImageDownloading => true;        private string _name;        /// <summary>        /// Gets or sets the name.        /// </summary>        /// <value>The name.</value>        [JsonIgnore]        public virtual string Name        {            get => _name;            set            {                _name = value;                // lazy load this again                _sortName = null;            }        }        [JsonIgnore]        public bool IsUnaired => PremiereDate.HasValue && PremiereDate.Value.ToLocalTime().Date >= DateTime.Now.Date;        [JsonIgnore]        public int? TotalBitrate { get; set; }        [JsonIgnore]        public ExtraType? ExtraType { get; set; }        [JsonIgnore]        public bool IsThemeMedia => ExtraType.HasValue && (ExtraType.Value == Model.Entities.ExtraType.ThemeSong || ExtraType.Value == Model.Entities.ExtraType.ThemeVideo);        [JsonIgnore]        public string OriginalTitle { get; set; }        /// <summary>        /// Gets or sets the id.        /// </summary>        /// <value>The id.</value>        [JsonIgnore]        public Guid Id { get; set; }        [JsonIgnore]        public Guid OwnerId { get; set; }        /// <summary>        /// Gets or sets the audio.        /// </summary>        /// <value>The audio.</value>        [JsonIgnore]        public ProgramAudio? Audio { get; set; }        /// <summary>        /// Return the id that should be used to key display prefs for this item.        /// Default is based on the type for everything except actual generic folders.        /// </summary>        /// <value>The display prefs id.</value>        [JsonIgnore]        public virtual Guid DisplayPreferencesId        {            get            {                var thisType = GetType();                return thisType == typeof(Folder) ? Id : thisType.FullName.GetMD5();            }        }        /// <summary>        /// Gets or sets the path.        /// </summary>        /// <value>The path.</value>        [JsonIgnore]        public virtual string Path { get; set; }        [JsonIgnore]        public virtual SourceType SourceType        {            get            {                if (!ChannelId.Equals(Guid.Empty))                {                    return SourceType.Channel;                }                return SourceType.Library;            }        }        /// <summary>        /// Returns the folder containing the item.        /// If the item is a folder, it returns the folder itself.        /// </summary>        [JsonIgnore]        public virtual string ContainingFolderPath        {            get            {                if (IsFolder)                {                    return Path;                }                return System.IO.Path.GetDirectoryName(Path);            }        }        /// <summary>        /// Gets or sets the name of the service.        /// </summary>        /// <value>The name of the service.</value>        [JsonIgnore]        public string ServiceName { get; set; }        /// <summary>        /// If this content came from an external service, the id of the content on that service.        /// </summary>        [JsonIgnore]        public string ExternalId { get; set; }        [JsonIgnore]        public string ExternalSeriesId { get; set; }        /// <summary>        /// Gets or sets the etag.        /// </summary>        /// <value>The etag.</value>        [JsonIgnore]        public string ExternalEtag { get; set; }        [JsonIgnore]        public virtual bool IsHidden => false;        public BaseItem GetOwner()        {            var ownerId = OwnerId;            return ownerId.Equals(Guid.Empty) ? null : LibraryManager.GetItemById(ownerId);        }        /// <summary>        /// Gets or sets the type of the location.        /// </summary>        /// <value>The type of the location.</value>        [JsonIgnore]        public virtual LocationType LocationType        {            get            {                // if (IsOffline)                //{                //    return LocationType.Offline;                //}                var path = Path;                if (string.IsNullOrEmpty(path))                {                    if (SourceType == SourceType.Channel)                    {                        return LocationType.Remote;                    }                    return LocationType.Virtual;                }                return FileSystem.IsPathFile(path) ? LocationType.FileSystem : LocationType.Remote;            }        }        [JsonIgnore]        public MediaProtocol? PathProtocol        {            get            {                var path = Path;                if (string.IsNullOrEmpty(path))                {                    return null;                }                return MediaSourceManager.GetPathProtocol(path);            }        }        public bool IsPathProtocol(MediaProtocol protocol)        {            var current = PathProtocol;            return current.HasValue && current.Value == protocol;        }        [JsonIgnore]        public bool IsFileProtocol => IsPathProtocol(MediaProtocol.File);        [JsonIgnore]        public bool HasPathProtocol => PathProtocol.HasValue;        [JsonIgnore]        public virtual bool SupportsLocalMetadata        {            get            {                if (SourceType == SourceType.Channel)                {                    return false;                }                return IsFileProtocol;            }        }        [JsonIgnore]        public virtual string FileNameWithoutExtension        {            get            {                if (IsFileProtocol)                {                    return System.IO.Path.GetFileNameWithoutExtension(Path);                }                return null;            }        }        [JsonIgnore]        public virtual bool EnableAlphaNumericSorting => true;        private List<Tuple<StringBuilder, bool>> GetSortChunks(string s1)        {            var list = new List<Tuple<StringBuilder, bool>>();            int thisMarker = 0;            while (thisMarker < s1.Length)            {                char thisCh = s1[thisMarker];                var thisChunk = new StringBuilder();                bool isNumeric = char.IsDigit(thisCh);                while (thisMarker < s1.Length && char.IsDigit(thisCh) == isNumeric)                {                    thisChunk.Append(thisCh);                    thisMarker++;                    if (thisMarker < s1.Length)                    {                        thisCh = s1[thisMarker];                    }                }                list.Add(new Tuple<StringBuilder, bool>(thisChunk, isNumeric));            }            return list;        }        /// <summary>        /// This is just a helper for convenience.        /// </summary>        /// <value>The primary image path.</value>        [JsonIgnore]        public string PrimaryImagePath => this.GetImagePath(ImageType.Primary);        public virtual bool CanDelete()        {            if (SourceType == SourceType.Channel)            {                return ChannelManager.CanDelete(this);            }            return IsFileProtocol;        }        public virtual bool IsAuthorizedToDelete(User user, List<Folder> allCollectionFolders)        {            if (user.HasPermission(PermissionKind.EnableContentDeletion))            {                return true;            }            var allowed = user.GetPreferenceValues<Guid>(PreferenceKind.EnableContentDeletionFromFolders);            if (SourceType == SourceType.Channel)            {                return allowed.Contains(ChannelId);            }            else            {                var collectionFolders = LibraryManager.GetCollectionFolders(this, allCollectionFolders);                foreach (var folder in collectionFolders)                {                    if (allowed.Contains(folder.Id))                    {                        return true;                    }                }            }            return false;        }        public bool CanDelete(User user, List<Folder> allCollectionFolders)        {            return CanDelete() && IsAuthorizedToDelete(user, allCollectionFolders);        }        public bool CanDelete(User user)        {            var allCollectionFolders = LibraryManager.GetUserRootFolder().Children.OfType<Folder>().ToList();            return CanDelete(user, allCollectionFolders);        }        public virtual bool CanDownload()        {            return false;        }        public virtual bool IsAuthorizedToDownload(User user)        {            return user.HasPermission(PermissionKind.EnableContentDownloading);        }        public bool CanDownload(User user)        {            return CanDownload() && IsAuthorizedToDownload(user);        }        /// <summary>        /// Gets or sets the date created.        /// </summary>        /// <value>The date created.</value>        [JsonIgnore]        public DateTime DateCreated { get; set; }        /// <summary>        /// Gets or sets the date modified.        /// </summary>        /// <value>The date modified.</value>        [JsonIgnore]        public DateTime DateModified { get; set; }        public DateTime DateLastSaved { get; set; }        [JsonIgnore]        public DateTime DateLastRefreshed { get; set; }        /// <summary>        /// The logger.        /// </summary>        public static ILogger<BaseItem> Logger { get; set; }        public static ILibraryManager LibraryManager { get; set; }        public static IServerConfigurationManager ConfigurationManager { get; set; }        public static IProviderManager ProviderManager { get; set; }        public static ILocalizationManager LocalizationManager { get; set; }        public static IItemRepository ItemRepository { get; set; }        public static IFileSystem FileSystem { get; set; }        public static IUserDataManager UserDataManager { get; set; }        public static IChannelManager ChannelManager { get; set; }        public static IMediaSourceManager MediaSourceManager { get; set; }        /// <summary>        /// Returns a <see cref="string" /> that represents this instance.        /// </summary>        /// <returns>A <see cref="string" /> that represents this instance.</returns>        public override string ToString()        {            return Name;        }        [JsonIgnore]        public bool IsLocked { get; set; }        /// <summary>        /// Gets or sets the locked fields.        /// </summary>        /// <value>The locked fields.</value>        [JsonIgnore]        public MetadataField[] LockedFields { get; set; }        /// <summary>        /// Gets the type of the media.        /// </summary>        /// <value>The type of the media.</value>        [JsonIgnore]        public virtual string MediaType => null;        [JsonIgnore]        public virtual string[] PhysicalLocations        {            get            {                if (!IsFileProtocol)                {                    return Array.Empty<string>();                }                return new[] { Path };            }        }        private string _forcedSortName;        /// <summary>        /// Gets or sets the name of the forced sort.        /// </summary>        /// <value>The name of the forced sort.</value>        [JsonIgnore]        public string ForcedSortName        {            get => _forcedSortName;            set { _forcedSortName = value; _sortName = null; }        }        private string _sortName;        private Guid[] _themeSongIds;        private Guid[] _themeVideoIds;        /// <summary>        /// Gets the name of the sort.        /// </summary>        /// <value>The name of the sort.</value>        [JsonIgnore]        public string SortName        {            get            {                if (_sortName == null)                {                    if (!string.IsNullOrEmpty(ForcedSortName))                    {                        // Need the ToLower because that's what CreateSortName does                        _sortName = ModifySortChunks(ForcedSortName).ToLowerInvariant();                    }                    else                    {                        _sortName = CreateSortName();                    }                }                return _sortName;            }            set => _sortName = value;        }        public string GetInternalMetadataPath()        {            var basePath = ConfigurationManager.ApplicationPaths.InternalMetadataPath;            return GetInternalMetadataPath(basePath);        }        protected virtual string GetInternalMetadataPath(string basePath)        {            if (SourceType == SourceType.Channel)            {                return System.IO.Path.Combine(basePath, "channels", ChannelId.ToString("N", CultureInfo.InvariantCulture), Id.ToString("N", CultureInfo.InvariantCulture));            }            ReadOnlySpan<char> idString = Id.ToString("N", CultureInfo.InvariantCulture);            basePath = System.IO.Path.Combine(basePath, "library");            return System.IO.Path.Join(basePath, idString.Slice(0, 2), idString);        }        /// <summary>        /// Creates the name of the sort.        /// </summary>        /// <returns>System.String.</returns>        protected virtual string CreateSortName()        {            if (Name == null)            {                return null; // some items may not have name filled in properly            }            if (!EnableAlphaNumericSorting)            {                return Name.TrimStart();            }            var sortable = Name.Trim().ToLowerInvariant();            foreach (var removeChar in ConfigurationManager.Configuration.SortRemoveCharacters)            {                sortable = sortable.Replace(removeChar, string.Empty, StringComparison.Ordinal);            }            foreach (var replaceChar in ConfigurationManager.Configuration.SortReplaceCharacters)            {                sortable = sortable.Replace(replaceChar, " ", StringComparison.Ordinal);            }            foreach (var search in ConfigurationManager.Configuration.SortRemoveWords)            {                // Remove from beginning if a space follows                if (sortable.StartsWith(search + " ", StringComparison.Ordinal))                {                    sortable = sortable.Remove(0, search.Length + 1);                }                // Remove from middle if surrounded by spaces                sortable = sortable.Replace(" " + search + " ", " ", StringComparison.Ordinal);                // Remove from end if followed by a space                if (sortable.EndsWith(" " + search, StringComparison.Ordinal))                {                    sortable = sortable.Remove(sortable.Length - (search.Length + 1));                }            }            return ModifySortChunks(sortable);        }        private string ModifySortChunks(string name)        {            var chunks = GetSortChunks(name);            var builder = new StringBuilder();            foreach (var chunk in chunks)            {                var chunkBuilder = chunk.Item1;                // This chunk is numeric                if (chunk.Item2)                {                    while (chunkBuilder.Length < 10)                    {                        chunkBuilder.Insert(0, '0');                    }                }                builder.Append(chunkBuilder);            }            // logger.LogDebug("ModifySortChunks Start: {0} End: {1}", name, builder.ToString());            return builder.ToString().RemoveDiacritics();        }        [JsonIgnore]        public bool EnableMediaSourceDisplay        {            get            {                if (SourceType == SourceType.Channel)                {                    return ChannelManager.EnableMediaSourceDisplay(this);                }                return true;            }        }        [JsonIgnore]        public Guid ParentId { get; set; }        /// <summary>        /// Gets or sets the parent.        /// </summary>        /// <value>The parent.</value>        [JsonIgnore]        public Folder Parent        {            get => GetParent() as Folder;            set            {            }        }        public void SetParent(Folder parent)        {            ParentId = parent == null ? Guid.Empty : parent.Id;        }        public BaseItem GetParent()        {            var parentId = ParentId;            if (!parentId.Equals(Guid.Empty))            {                return LibraryManager.GetItemById(parentId);            }            return null;        }        public IEnumerable<BaseItem> GetParents()        {            var parent = GetParent();            while (parent != null)            {                yield return parent;                parent = parent.GetParent();            }        }        /// <summary>        /// Finds a parent of a given type.        /// </summary>        /// <typeparam name="T"></typeparam>        /// <returns>``0.</returns>        public T FindParent<T>()            where T : Folder        {            foreach (var parent in GetParents())            {                var item = parent as T;                if (item != null)                {                    return item;                }            }            return null;        }        [JsonIgnore]        public virtual Guid DisplayParentId        {            get            {                var parentId = ParentId;                return parentId;            }        }        [JsonIgnore]        public BaseItem DisplayParent        {            get            {                var id = DisplayParentId;                if (id.Equals(Guid.Empty))                {                    return null;                }                return LibraryManager.GetItemById(id);            }        }        /// <summary>        /// When the item first debuted. For movies this could be premiere date, episodes would be first aired        /// </summary>        /// <value>The premiere date.</value>        [JsonIgnore]        public DateTime? PremiereDate { get; set; }        /// <summary>        /// Gets or sets the end date.        /// </summary>        /// <value>The end date.</value>        [JsonIgnore]        public DateTime? EndDate { get; set; }        /// <summary>        /// Gets or sets the official rating.        /// </summary>        /// <value>The official rating.</value>        [JsonIgnore]        public string OfficialRating { get; set; }        [JsonIgnore]        public int InheritedParentalRatingValue { get; set; }        /// <summary>        /// Gets or sets the critic rating.        /// </summary>        /// <value>The critic rating.</value>        [JsonIgnore]        public float? CriticRating { get; set; }        /// <summary>        /// Gets or sets the custom rating.        /// </summary>        /// <value>The custom rating.</value>        [JsonIgnore]        public string CustomRating { get; set; }        /// <summary>        /// Gets or sets the overview.        /// </summary>        /// <value>The overview.</value>        [JsonIgnore]        public string Overview { get; set; }        /// <summary>        /// Gets or sets the studios.        /// </summary>        /// <value>The studios.</value>        [JsonIgnore]        public string[] Studios { get; set; }        /// <summary>        /// Gets or sets the genres.        /// </summary>        /// <value>The genres.</value>        [JsonIgnore]        public string[] Genres { get; set; }        /// <summary>        /// Gets or sets the tags.        /// </summary>        /// <value>The tags.</value>        [JsonIgnore]        public string[] Tags { get; set; }        [JsonIgnore]        public string[] ProductionLocations { get; set; }        /// <summary>        /// Gets or sets the home page URL.        /// </summary>        /// <value>The home page URL.</value>        [JsonIgnore]        public string HomePageUrl { get; set; }        /// <summary>        /// Gets or sets the community rating.        /// </summary>        /// <value>The community rating.</value>        [JsonIgnore]        public float? CommunityRating { get; set; }        /// <summary>        /// Gets or sets the run time ticks.        /// </summary>        /// <value>The run time ticks.</value>        [JsonIgnore]        public long? RunTimeTicks { get; set; }        /// <summary>        /// Gets or sets the production year.        /// </summary>        /// <value>The production year.</value>        [JsonIgnore]        public int? ProductionYear { get; set; }        /// <summary>        /// If the item is part of a series, this is it's number in the series.        /// This could be episode number, album track number, etc.        /// </summary>        /// <value>The index number.</value>        [JsonIgnore]        public int? IndexNumber { get; set; }        /// <summary>        /// For an episode this could be the season number, or for a song this could be the disc number.        /// </summary>        /// <value>The parent index number.</value>        [JsonIgnore]        public int? ParentIndexNumber { get; set; }        [JsonIgnore]        public virtual bool HasLocalAlternateVersions => false;        [JsonIgnore]        public string OfficialRatingForComparison        {            get            {                var officialRating = OfficialRating;                if (!string.IsNullOrEmpty(officialRating))                {                    return officialRating;                }                var parent = DisplayParent;                if (parent != null)                {                    return parent.OfficialRatingForComparison;                }                return null;            }        }        [JsonIgnore]        public string CustomRatingForComparison        {            get            {                var customRating = CustomRating;                if (!string.IsNullOrEmpty(customRating))                {                    return customRating;                }                var parent = DisplayParent;                if (parent != null)                {                    return parent.CustomRatingForComparison;                }                return null;            }        }        /// <summary>        /// Gets the play access.        /// </summary>        /// <param name="user">The user.</param>        /// <returns>PlayAccess.</returns>        public PlayAccess GetPlayAccess(User user)        {            if (!user.HasPermission(PermissionKind.EnableMediaPlayback))            {                return PlayAccess.None;            }            // if (!user.IsParentalScheduleAllowed())            //{            //    return PlayAccess.None;            //}            return PlayAccess.Full;        }        public virtual List<MediaStream> GetMediaStreams()        {            return MediaSourceManager.GetMediaStreams(new MediaStreamQuery            {                ItemId = Id            });        }        protected virtual bool IsActiveRecording()        {            return false;        }        public virtual List<MediaSourceInfo> GetMediaSources(bool enablePathSubstitution)        {            if (SourceType == SourceType.Channel)            {                var sources = ChannelManager.GetStaticMediaSources(this, CancellationToken.None)                           .ToList();                if (sources.Count > 0)                {                    return sources;                }            }            var list = GetAllItemsForMediaSources();            var result = list.Select(i => GetVersionInfo(enablePathSubstitution, i.Item1, i.Item2)).ToList();            if (IsActiveRecording())            {                foreach (var mediaSource in result)                {                    mediaSource.Type = MediaSourceType.Placeholder;                }            }            return result.OrderBy(i =>            {                if (i.VideoType == VideoType.VideoFile)                {                    return 0;                }                return 1;            }).ThenBy(i => i.Video3DFormat.HasValue ? 1 : 0)            .ThenByDescending(i =>            {                var stream = i.VideoStream;                return stream == null || stream.Width == null ? 0 : stream.Width.Value;            })            .ToList();        }        protected virtual List<Tuple<BaseItem, MediaSourceType>> GetAllItemsForMediaSources()        {            return new List<Tuple<BaseItem, MediaSourceType>>();        }        private MediaSourceInfo GetVersionInfo(bool enablePathSubstitution, BaseItem item, MediaSourceType type)        {            if (item == null)            {                throw new ArgumentNullException(nameof(item));            }            var protocol = item.PathProtocol;            var info = new MediaSourceInfo            {                Id = item.Id.ToString("N", CultureInfo.InvariantCulture),                Protocol = protocol ?? MediaProtocol.File,                MediaStreams = MediaSourceManager.GetMediaStreams(item.Id),                MediaAttachments = MediaSourceManager.GetMediaAttachments(item.Id),                Name = GetMediaSourceName(item),                Path = enablePathSubstitution ? GetMappedPath(item, item.Path, protocol) : item.Path,                RunTimeTicks = item.RunTimeTicks,                Container = item.Container,                Size = item.Size,                Type = type            };            if (string.IsNullOrEmpty(info.Path))            {                info.Type = MediaSourceType.Placeholder;            }            if (info.Protocol == MediaProtocol.File)            {                info.ETag = item.DateModified.Ticks.ToString(CultureInfo.InvariantCulture).GetMD5().ToString("N", CultureInfo.InvariantCulture);            }            var video = item as Video;            if (video != null)            {                info.IsoType = video.IsoType;                info.VideoType = video.VideoType;                info.Video3DFormat = video.Video3DFormat;                info.Timestamp = video.Timestamp;                if (video.IsShortcut)                {                    info.IsRemote = true;                    info.Path = video.ShortcutPath;                    info.Protocol = MediaSourceManager.GetPathProtocol(info.Path);                }                if (string.IsNullOrEmpty(info.Container))                {                    if (video.VideoType == VideoType.VideoFile || video.VideoType == VideoType.Iso)                    {                        if (protocol.HasValue && protocol.Value == MediaProtocol.File)                        {                            info.Container = System.IO.Path.GetExtension(item.Path).TrimStart('.');                        }                    }                }            }            if (string.IsNullOrEmpty(info.Container))            {                if (protocol.HasValue && protocol.Value == MediaProtocol.File)                {                    info.Container = System.IO.Path.GetExtension(item.Path).TrimStart('.');                }            }            if (info.SupportsDirectStream && !string.IsNullOrEmpty(info.Path))            {                info.SupportsDirectStream = MediaSourceManager.SupportsDirectStream(info.Path, info.Protocol);            }            if (video != null && video.VideoType != VideoType.VideoFile)            {                info.SupportsDirectStream = false;            }            info.Bitrate = item.TotalBitrate;            info.InferTotalBitrate();            return info;        }        private string GetMediaSourceName(BaseItem item)        {            var terms = new List<string>();            var path = item.Path;            if (item.IsFileProtocol && !string.IsNullOrEmpty(path))            {                if (HasLocalAlternateVersions)                {                    var displayName = System.IO.Path.GetFileNameWithoutExtension(path)                        .Replace(System.IO.Path.GetFileName(ContainingFolderPath), string.Empty, StringComparison.OrdinalIgnoreCase)                        .TrimStart(new char[] { ' ', '-' });                    if (!string.IsNullOrEmpty(displayName))                    {                        terms.Add(displayName);                    }                }                if (terms.Count == 0)                {                    var displayName = System.IO.Path.GetFileNameWithoutExtension(path);                    terms.Add(displayName);                }            }            if (terms.Count == 0)            {                terms.Add(item.Name);            }            var video = item as Video;            if (video != null)            {                if (video.Video3DFormat.HasValue)                {                    terms.Add("3D");                }                if (video.VideoType == VideoType.BluRay)                {                    terms.Add("Bluray");                }                else if (video.VideoType == VideoType.Dvd)                {                    terms.Add("DVD");                }                else if (video.VideoType == VideoType.Iso)                {                    if (video.IsoType.HasValue)                    {                        if (video.IsoType.Value == IsoType.BluRay)                        {                            terms.Add("Bluray");                        }                        else if (video.IsoType.Value == IsoType.Dvd)                        {                            terms.Add("DVD");                        }                    }                    else                    {                        terms.Add("ISO");                    }                }            }            return string.Join("/", terms.ToArray());        }        /// <summary>        /// Loads the theme songs.        /// </summary>        /// <returns>List{Audio.Audio}.</returns>        private static Audio.Audio[] LoadThemeSongs(List<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)        {            var files = fileSystemChildren.Where(i => i.IsDirectory)                .Where(i => string.Equals(i.Name, ThemeSongsFolderName, StringComparison.OrdinalIgnoreCase))                .SelectMany(i => FileSystem.GetFiles(i.FullName))                .ToList();            // Support plex/xbmc convention            files.AddRange(fileSystemChildren                .Where(i => !i.IsDirectory && string.Equals(FileSystem.GetFileNameWithoutExtension(i), ThemeSongFilename, StringComparison.OrdinalIgnoreCase)));            return LibraryManager.ResolvePaths(files, directoryService, null, new LibraryOptions())                .OfType<Audio.Audio>()                .Select(audio =>                {                    // Try to retrieve it from the db. If we don't find it, use the resolved version                    var dbItem = LibraryManager.GetItemById(audio.Id) as Audio.Audio;                    if (dbItem != null)                    {                        audio = dbItem;                    }                    else                    {                        // item is new                        audio.ExtraType = MediaBrowser.Model.Entities.ExtraType.ThemeSong;                    }                    return audio;                    // Sort them so that the list can be easily compared for changes                }).OrderBy(i => i.Path).ToArray();        }        /// <summary>        /// Loads the video backdrops.        /// </summary>        /// <returns>List{Video}.</returns>        private static Video[] LoadThemeVideos(IEnumerable<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)        {            var files = fileSystemChildren.Where(i => i.IsDirectory)                .Where(i => string.Equals(i.Name, ThemeVideosFolderName, StringComparison.OrdinalIgnoreCase))                .SelectMany(i => FileSystem.GetFiles(i.FullName));            return LibraryManager.ResolvePaths(files, directoryService, null, new LibraryOptions())                .OfType<Video>()                .Select(item =>                {                    // Try to retrieve it from the db. If we don't find it, use the resolved version                    if (LibraryManager.GetItemById(item.Id) is Video dbItem)                    {                        item = dbItem;                    }                    else                    {                        // item is new                        item.ExtraType = Model.Entities.ExtraType.ThemeVideo;                    }                    return item;                    // Sort them so that the list can be easily compared for changes                }).OrderBy(i => i.Path).ToArray();        }        protected virtual BaseItem[] LoadExtras(List<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)        {            var extras = new List<Video>();            var folders = fileSystemChildren.Where(i => i.IsDirectory).ToArray();            foreach (var extraFolderName in AllExtrasTypesFolderNames)            {                var files = folders                    .Where(i => string.Equals(i.Name, extraFolderName, StringComparison.OrdinalIgnoreCase))                    .SelectMany(i => FileSystem.GetFiles(i.FullName));                extras.AddRange(LibraryManager.ResolvePaths(files, directoryService, null, new LibraryOptions())                    .OfType<Video>()                    .Select(item =>                    {                        // Try to retrieve it from the db. If we don't find it, use the resolved version                        if (LibraryManager.GetItemById(item.Id) is Video dbItem)                        {                            item = dbItem;                        }                        // Use some hackery to get the extra type based on foldername                        item.ExtraType = Enum.TryParse(extraFolderName.Replace(" ", string.Empty), true, out ExtraType extraType)                            ? extraType                            : Model.Entities.ExtraType.Unknown;                        return item;                        // Sort them so that the list can be easily compared for changes                    }).OrderBy(i => i.Path));            }            return extras.ToArray();        }        public Task RefreshMetadata(CancellationToken cancellationToken)        {            return RefreshMetadata(new MetadataRefreshOptions(new DirectoryService(FileSystem)), cancellationToken);        }        protected virtual void TriggerOnRefreshStart()        {        }        protected virtual void TriggerOnRefreshComplete()        {        }        /// <summary>        /// Overrides the base implementation to refresh metadata for local trailers.        /// </summary>        /// <param name="options">The options.</param>        /// <param name="cancellationToken">The cancellation token.</param>        /// <returns>true if a provider reports we changed.</returns>        public async Task<ItemUpdateType> RefreshMetadata(MetadataRefreshOptions options, CancellationToken cancellationToken)        {            TriggerOnRefreshStart();            var requiresSave = false;            if (SupportsOwnedItems)            {                try                {                    var files = IsFileProtocol ?                        GetFileSystemChildren(options.DirectoryService).ToList() :                        new List<FileSystemMetadata>();                    var ownedItemsChanged = await RefreshedOwnedItems(options, files, cancellationToken).ConfigureAwait(false);                    await LibraryManager.UpdateImagesAsync(this).ConfigureAwait(false); // ensure all image properties in DB are fresh                    if (ownedItemsChanged)                    {                        requiresSave = true;                    }                }                catch (Exception ex)                {                    Logger.LogError(ex, "Error refreshing owned items for {path}", Path ?? Name);                }            }            try            {                var refreshOptions = requiresSave                    ? new MetadataRefreshOptions(options)                    {                        ForceSave = true                    }                    : options;                return await ProviderManager.RefreshSingleItem(this, refreshOptions, cancellationToken).ConfigureAwait(false);            }            finally            {                TriggerOnRefreshComplete();            }        }        [JsonIgnore]        protected virtual bool SupportsOwnedItems => !ParentId.Equals(Guid.Empty) && IsFileProtocol;        [JsonIgnore]        public virtual bool SupportsPeople => false;        [JsonIgnore]        public virtual bool SupportsThemeMedia => false;        /// <summary>        /// Refreshes owned items such as trailers, theme videos, special features, etc.        /// Returns true or false indicating if changes were found.        /// </summary>        /// <param name="options"></param>        /// <param name="fileSystemChildren"></param>        /// <param name="cancellationToken"></param>        /// <returns></returns>        protected virtual async Task<bool> RefreshedOwnedItems(MetadataRefreshOptions options, List<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)        {            var themeSongsChanged = false;            var themeVideosChanged = false;            var extrasChanged = false;            var localTrailersChanged = false;            if (IsFileProtocol && SupportsOwnedItems)            {                if (SupportsThemeMedia)                {                    if (!IsInMixedFolder)                    {                        themeSongsChanged = await RefreshThemeSongs(this, options, fileSystemChildren, cancellationToken).ConfigureAwait(false);                        themeVideosChanged = await RefreshThemeVideos(this, options, fileSystemChildren, cancellationToken).ConfigureAwait(false);                        extrasChanged = await RefreshExtras(this, options, fileSystemChildren, cancellationToken).ConfigureAwait(false);                    }                }                var hasTrailers = this as IHasTrailers;                if (hasTrailers != null)                {                    localTrailersChanged = await RefreshLocalTrailers(hasTrailers, options, fileSystemChildren, cancellationToken).ConfigureAwait(false);                }            }            return themeSongsChanged || themeVideosChanged || extrasChanged || localTrailersChanged;        }        protected virtual FileSystemMetadata[] GetFileSystemChildren(IDirectoryService directoryService)        {            var path = ContainingFolderPath;            return directoryService.GetFileSystemEntries(path);        }        private async Task<bool> RefreshLocalTrailers(IHasTrailers item, MetadataRefreshOptions options, List<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)        {            var newItems = LibraryManager.FindTrailers(this, fileSystemChildren, options.DirectoryService);            var newItemIds = newItems.Select(i => i.Id);            var itemsChanged = !item.LocalTrailerIds.SequenceEqual(newItemIds);            var ownerId = item.Id;            var tasks = newItems.Select(i =>            {                var subOptions = new MetadataRefreshOptions(options);                if (i.ExtraType != Model.Entities.ExtraType.Trailer ||                    i.OwnerId != ownerId ||                    !i.ParentId.Equals(Guid.Empty))                {                    i.ExtraType = Model.Entities.ExtraType.Trailer;                    i.OwnerId = ownerId;                    i.ParentId = Guid.Empty;                    subOptions.ForceSave = true;                }                return RefreshMetadataForOwnedItem(i, true, subOptions, cancellationToken);            });            await Task.WhenAll(tasks).ConfigureAwait(false);            item.LocalTrailerIds = newItemIds.ToArray();            return itemsChanged;        }        private async Task<bool> RefreshExtras(BaseItem item, MetadataRefreshOptions options, List<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)        {            var extras = LoadExtras(fileSystemChildren, options.DirectoryService);            var themeVideos = LoadThemeVideos(fileSystemChildren, options.DirectoryService);            var themeSongs = LoadThemeSongs(fileSystemChildren, options.DirectoryService);            var newExtras = new BaseItem[extras.Length + themeVideos.Length + themeSongs.Length];            extras.CopyTo(newExtras, 0);            themeVideos.CopyTo(newExtras, extras.Length);            themeSongs.CopyTo(newExtras, extras.Length + themeVideos.Length);            var newExtraIds = newExtras.Select(i => i.Id).ToArray();            var extrasChanged = !item.ExtraIds.SequenceEqual(newExtraIds);            if (extrasChanged)            {                var ownerId = item.Id;                var tasks = newExtras.Select(i =>                {                    var subOptions = new MetadataRefreshOptions(options);                    if (i.OwnerId != ownerId || i.ParentId != Guid.Empty)                    {                        i.OwnerId = ownerId;                        i.ParentId = Guid.Empty;                        subOptions.ForceSave = true;                    }                    return RefreshMetadataForOwnedItem(i, true, subOptions, cancellationToken);                });                await Task.WhenAll(tasks).ConfigureAwait(false);                item.ExtraIds = newExtraIds;            }            return extrasChanged;        }        private async Task<bool> RefreshThemeVideos(BaseItem item, MetadataRefreshOptions options, IEnumerable<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)        {            var newThemeVideos = LoadThemeVideos(fileSystemChildren, options.DirectoryService);            var newThemeVideoIds = newThemeVideos.Select(i => i.Id).ToArray();            var themeVideosChanged = !item.ThemeVideoIds.SequenceEqual(newThemeVideoIds);            var ownerId = item.Id;            var tasks = newThemeVideos.Select(i =>            {                var subOptions = new MetadataRefreshOptions(options);                if (!i.ExtraType.HasValue ||                    i.ExtraType.Value != Model.Entities.ExtraType.ThemeVideo ||                    i.OwnerId != ownerId ||                    !i.ParentId.Equals(Guid.Empty))                {                    i.ExtraType = Model.Entities.ExtraType.ThemeVideo;                    i.OwnerId = ownerId;                    i.ParentId = Guid.Empty;                    subOptions.ForceSave = true;                }                return RefreshMetadataForOwnedItem(i, true, subOptions, cancellationToken);            });            await Task.WhenAll(tasks).ConfigureAwait(false);            // They are expected to be sorted by SortName            item.ThemeVideoIds = newThemeVideos.OrderBy(i => i.SortName).Select(i => i.Id).ToArray();            return themeVideosChanged;        }        /// <summary>        /// Refreshes the theme songs.        /// </summary>        private async Task<bool> RefreshThemeSongs(BaseItem item, MetadataRefreshOptions options, List<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)        {            var newThemeSongs = LoadThemeSongs(fileSystemChildren, options.DirectoryService);            var newThemeSongIds = newThemeSongs.Select(i => i.Id).ToArray();            var themeSongsChanged = !item.ThemeSongIds.SequenceEqual(newThemeSongIds);            var ownerId = item.Id;            var tasks = newThemeSongs.Select(i =>            {                var subOptions = new MetadataRefreshOptions(options);                if (!i.ExtraType.HasValue ||                    i.ExtraType.Value != Model.Entities.ExtraType.ThemeSong ||                    i.OwnerId != ownerId ||                    !i.ParentId.Equals(Guid.Empty))                {                    i.ExtraType = Model.Entities.ExtraType.ThemeSong;                    i.OwnerId = ownerId;                    i.ParentId = Guid.Empty;                    subOptions.ForceSave = true;                }                return RefreshMetadataForOwnedItem(i, true, subOptions, cancellationToken);            });            await Task.WhenAll(tasks).ConfigureAwait(false);            // They are expected to be sorted by SortName            item.ThemeSongIds = newThemeSongs.OrderBy(i => i.SortName).Select(i => i.Id).ToArray();            return themeSongsChanged;        }        /// <summary>        /// Gets or sets the provider ids.        /// </summary>        /// <value>The provider ids.</value>        [JsonIgnore]        public Dictionary<string, string> ProviderIds { get; set; }        [JsonIgnore]        public virtual Folder LatestItemsIndexContainer => null;        public virtual double GetDefaultPrimaryImageAspectRatio()        {            return 0;        }        public virtual string CreatePresentationUniqueKey()        {            return Id.ToString("N", CultureInfo.InvariantCulture);        }        [JsonIgnore]        public string PresentationUniqueKey { get; set; }        public string GetPresentationUniqueKey()        {            return PresentationUniqueKey ?? CreatePresentationUniqueKey();        }        public virtual bool RequiresRefresh()        {            return false;        }        public virtual List<string> GetUserDataKeys()        {            var list = new List<string>();            if (SourceType == SourceType.Channel)            {                if (!string.IsNullOrEmpty(ExternalId))                {                    list.Add(ExternalId);                }            }            list.Add(Id.ToString());            return list;        }        internal virtual ItemUpdateType UpdateFromResolvedItem(BaseItem newItem)        {            var updateType = ItemUpdateType.None;            if (IsInMixedFolder != newItem.IsInMixedFolder)            {                IsInMixedFolder = newItem.IsInMixedFolder;                updateType |= ItemUpdateType.MetadataImport;            }            return updateType;        }        public void AfterMetadataRefresh()        {            _sortName = null;        }        /// <summary>        /// Gets the preferred metadata language.        /// </summary>        /// <returns>System.String.</returns>        public string GetPreferredMetadataLanguage()        {            string lang = PreferredMetadataLanguage;            if (string.IsNullOrEmpty(lang))            {                lang = GetParents()                    .Select(i => i.PreferredMetadataLanguage)                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));            }            if (string.IsNullOrEmpty(lang))            {                lang = LibraryManager.GetCollectionFolders(this)                    .Select(i => i.PreferredMetadataLanguage)                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));            }            if (string.IsNullOrEmpty(lang))            {                lang = LibraryManager.GetLibraryOptions(this).PreferredMetadataLanguage;            }            if (string.IsNullOrEmpty(lang))            {                lang = ConfigurationManager.Configuration.PreferredMetadataLanguage;            }            return lang;        }        /// <summary>        /// Gets the preferred metadata language.        /// </summary>        /// <returns>System.String.</returns>        public string GetPreferredMetadataCountryCode()        {            string lang = PreferredMetadataCountryCode;            if (string.IsNullOrEmpty(lang))            {                lang = GetParents()                    .Select(i => i.PreferredMetadataCountryCode)                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));            }            if (string.IsNullOrEmpty(lang))            {                lang = LibraryManager.GetCollectionFolders(this)                    .Select(i => i.PreferredMetadataCountryCode)                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));            }            if (string.IsNullOrEmpty(lang))            {                lang = LibraryManager.GetLibraryOptions(this).MetadataCountryCode;            }            if (string.IsNullOrEmpty(lang))            {                lang = ConfigurationManager.Configuration.MetadataCountryCode;            }            return lang;        }        public virtual bool IsSaveLocalMetadataEnabled()        {            if (SourceType == SourceType.Channel)            {                return false;            }            var libraryOptions = LibraryManager.GetLibraryOptions(this);            return libraryOptions.SaveLocalMetadata;        }        /// <summary>        /// Determines if a given user has access to this item.        /// </summary>        /// <param name="user">The user.</param>        /// <returns><c>true</c> if [is parental allowed] [the specified user]; otherwise, <c>false</c>.</returns>        /// <exception cref="ArgumentNullException">user</exception>        public bool IsParentalAllowed(User user)        {            if (user == null)            {                throw new ArgumentNullException(nameof(user));            }            if (!IsVisibleViaTags(user))            {                return false;            }            var maxAllowedRating = user.MaxParentalAgeRating;            if (maxAllowedRating == null)            {                return true;            }            var rating = CustomRatingForComparison;            if (string.IsNullOrEmpty(rating))            {                rating = OfficialRatingForComparison;            }            if (string.IsNullOrEmpty(rating))            {                return !GetBlockUnratedValue(user);            }            var value = LocalizationManager.GetRatingLevel(rating);            // Could not determine the integer value            if (!value.HasValue)            {                var isAllowed = !GetBlockUnratedValue(user);                if (!isAllowed)                {                    Logger.LogDebug("{0} has an unrecognized parental rating of {1}.", Name, rating);                }                return isAllowed;            }            return value.Value <= maxAllowedRating.Value;        }        public int? GetParentalRatingValue()        {            var rating = CustomRating;            if (string.IsNullOrEmpty(rating))            {                rating = OfficialRating;            }            if (string.IsNullOrEmpty(rating))            {                return null;            }            return LocalizationManager.GetRatingLevel(rating);        }        public int? GetInheritedParentalRatingValue()        {            var rating = CustomRatingForComparison;            if (string.IsNullOrEmpty(rating))            {                rating = OfficialRatingForComparison;            }            if (string.IsNullOrEmpty(rating))            {                return null;            }            return LocalizationManager.GetRatingLevel(rating);        }        public List<string> GetInheritedTags()        {            var list = new List<string>();            list.AddRange(Tags);            foreach (var parent in GetParents())            {                list.AddRange(parent.Tags);            }            return list.Distinct(StringComparer.OrdinalIgnoreCase).ToList();        }        private bool IsVisibleViaTags(User user)        {            if (user.GetPreference(PreferenceKind.BlockedTags).Any(i => Tags.Contains(i, StringComparer.OrdinalIgnoreCase)))            {                return false;            }            return true;        }        protected virtual bool IsAllowTagFilterEnforced()        {            return true;        }        public virtual UnratedItem GetBlockUnratedType()        {            if (SourceType == SourceType.Channel)            {                return UnratedItem.ChannelContent;            }            return UnratedItem.Other;        }        /// <summary>        /// Gets the block unrated value.        /// </summary>        /// <param name="user">The configuration.</param>        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>        protected virtual bool GetBlockUnratedValue(User user)        {            // Don't block plain folders that are unrated. Let the media underneath get blocked            // Special folders like series and albums will override this method.            if (IsFolder || this is IItemByName)            {                return false;            }            return user.GetPreferenceValues<UnratedItem>(PreferenceKind.BlockUnratedItems).Contains(GetBlockUnratedType());        }        /// <summary>        /// Determines if this folder should be visible to a given user.        /// Default is just parental allowed. Can be overridden for more functionality.        /// </summary>        /// <param name="user">The user.</param>        /// <returns><c>true</c> if the specified user is visible; otherwise, <c>false</c>.</returns>        /// <exception cref="ArgumentNullException">user</exception>        public virtual bool IsVisible(User user)        {            if (user == null)            {                throw new ArgumentNullException(nameof(user));            }            return IsParentalAllowed(user);        }        public virtual bool IsVisibleStandalone(User user)        {            if (SourceType == SourceType.Channel)            {                return IsVisibleStandaloneInternal(user, false) && Channel.IsChannelVisible(this, user);            }            return IsVisibleStandaloneInternal(user, true);        }        [JsonIgnore]        public virtual bool SupportsInheritedParentImages => false;        protected bool IsVisibleStandaloneInternal(User user, bool checkFolders)        {            if (!IsVisible(user))            {                return false;            }            if (GetParents().Any(i => !i.IsVisible(user)))            {                return false;            }            if (checkFolders)            {                var topParent = GetParents().LastOrDefault() ?? this;                if (string.IsNullOrEmpty(topParent.Path))                {                    return true;                }                var itemCollectionFolders = LibraryManager.GetCollectionFolders(this).Select(i => i.Id).ToList();                if (itemCollectionFolders.Count > 0)                {                    var userCollectionFolders = LibraryManager.GetUserRootFolder().GetChildren(user, true).Select(i => i.Id).ToList();                    if (!itemCollectionFolders.Any(userCollectionFolders.Contains))                    {                        return false;                    }                }            }            return true;        }        /// <summary>        /// Gets a value indicating whether this instance is folder.        /// </summary>        /// <value><c>true</c> if this instance is folder; otherwise, <c>false</c>.</value>        [JsonIgnore]        public virtual bool IsFolder => false;        [JsonIgnore]        public virtual bool IsDisplayedAsFolder => false;        public virtual string GetClientTypeName()        {            if (IsFolder && SourceType == SourceType.Channel && !(this is Channel))            {                return "ChannelFolderItem";            }            return GetType().Name;        }        /// <summary>        /// Gets the linked child.        /// </summary>        /// <param name="info">The info.</param>        /// <returns>BaseItem.</returns>        protected BaseItem GetLinkedChild(LinkedChild info)        {            // First get using the cached Id            if (info.ItemId.HasValue)            {                if (info.ItemId.Value.Equals(Guid.Empty))                {                    return null;                }                var itemById = LibraryManager.GetItemById(info.ItemId.Value);                if (itemById != null)                {                    return itemById;                }            }            var item = FindLinkedChild(info);            // If still null, log            if (item == null)            {                // Don't keep searching over and over                info.ItemId = Guid.Empty;            }            else            {                // Cache the id for next time                info.ItemId = item.Id;            }            return item;        }        private BaseItem FindLinkedChild(LinkedChild info)        {            var path = info.Path;            if (!string.IsNullOrEmpty(path))            {                path = FileSystem.MakeAbsolutePath(ContainingFolderPath, path);                var itemByPath = LibraryManager.FindByPath(path, null);                if (itemByPath == null)                {                    Logger.LogWarning("Unable to find linked item at path {0}", info.Path);                }                return itemByPath;            }            if (!string.IsNullOrEmpty(info.LibraryItemId))            {                var item = LibraryManager.GetItemById(info.LibraryItemId);                if (item == null)                {                    Logger.LogWarning("Unable to find linked item at path {0}", info.Path);                }                return item;            }            return null;        }        [JsonIgnore]        public virtual bool EnableRememberingTrackSelections => true;        /// <summary>        /// Adds a studio to the item.        /// </summary>        /// <param name="name">The name.</param>        /// <exception cref="ArgumentNullException"></exception>        public void AddStudio(string name)        {            if (string.IsNullOrEmpty(name))            {                throw new ArgumentNullException(nameof(name));            }            var current = Studios;            if (!current.Contains(name, StringComparer.OrdinalIgnoreCase))            {                int curLen = current.Length;                if (curLen == 0)                {                    Studios = new[] { name };                }                else                {                    var newArr = new string[curLen + 1];                    current.CopyTo(newArr, 0);                    newArr[curLen] = name;                    Studios = newArr;                }            }        }        public void SetStudios(IEnumerable<string> names)        {            Studios = names.Distinct().ToArray();        }        /// <summary>        /// Adds a genre to the item.        /// </summary>        /// <param name="name">The name.</param>        /// <exception cref="ArgumentNullException"></exception>        public void AddGenre(string name)        {            if (string.IsNullOrEmpty(name))            {                throw new ArgumentNullException(nameof(name));            }            var genres = Genres;            if (!genres.Contains(name, StringComparer.OrdinalIgnoreCase))            {                var list = genres.ToList();                list.Add(name);                Genres = list.ToArray();            }        }        /// <summary>        /// Marks the played.        /// </summary>        /// <param name="user">The user.</param>        /// <param name="datePlayed">The date played.</param>        /// <param name="resetPosition">if set to <c>true</c> [reset position].</param>        /// <returns>Task.</returns>        /// <exception cref="ArgumentNullException"></exception>        public virtual void MarkPlayed(            User user,            DateTime? datePlayed,            bool resetPosition)        {            if (user == null)            {                throw new ArgumentNullException(nameof(user));            }            var data = UserDataManager.GetUserData(user, this);            if (datePlayed.HasValue)            {                // Increment                data.PlayCount++;            }            // Ensure it's at least one            data.PlayCount = Math.Max(data.PlayCount, 1);            if (resetPosition)            {                data.PlaybackPositionTicks = 0;            }            data.LastPlayedDate = datePlayed ?? data.LastPlayedDate ?? DateTime.UtcNow;            data.Played = true;            UserDataManager.SaveUserData(user.Id, this, data, UserDataSaveReason.TogglePlayed, CancellationToken.None);        }        /// <summary>        /// Marks the unplayed.        /// </summary>        /// <param name="user">The user.</param>        /// <returns>Task.</returns>        /// <exception cref="ArgumentNullException"></exception>        public virtual void MarkUnplayed(User user)        {            if (user == null)            {                throw new ArgumentNullException(nameof(user));            }            var data = UserDataManager.GetUserData(user, this);            // I think it is okay to do this here.            // if this is only called when a user is manually forcing something to un-played            // then it probably is what we want to do...            data.PlayCount = 0;            data.PlaybackPositionTicks = 0;            data.LastPlayedDate = null;            data.Played = false;            UserDataManager.SaveUserData(user.Id, this, data, UserDataSaveReason.TogglePlayed, CancellationToken.None);        }        /// <summary>        /// Do whatever refreshing is necessary when the filesystem pertaining to this item has changed.        /// </summary>        public virtual void ChangedExternally()        {            ProviderManager.QueueRefresh(Id, new MetadataRefreshOptions(new DirectoryService(FileSystem)), RefreshPriority.High);        }        /// <summary>        /// Gets an image.        /// </summary>        /// <param name="type">The type.</param>        /// <param name="imageIndex">Index of the image.</param>        /// <returns><c>true</c> if the specified type has image; otherwise, <c>false</c>.</returns>        /// <exception cref="ArgumentException">Backdrops should be accessed using Item.Backdrops</exception>        public bool HasImage(ImageType type, int imageIndex)        {            return GetImageInfo(type, imageIndex) != null;        }        public void SetImage(ItemImageInfo image, int index)        {            if (image.Type == ImageType.Chapter)            {                throw new ArgumentException("Cannot set chapter images using SetImagePath");            }            var existingImage = GetImageInfo(image.Type, index);            if (existingImage != null)            {                existingImage.Path = image.Path;                existingImage.DateModified = image.DateModified;                existingImage.Width = image.Width;                existingImage.Height = image.Height;                existingImage.BlurHash = image.BlurHash;            }            else            {                var current = ImageInfos;                var currentCount = current.Length;                var newArr = new ItemImageInfo[currentCount + 1];                current.CopyTo(newArr, 0);                newArr[currentCount] = image;                ImageInfos = newArr;            }        }        public void SetImagePath(ImageType type, int index, FileSystemMetadata file)        {            if (type == ImageType.Chapter)            {                throw new ArgumentException("Cannot set chapter images using SetImagePath");            }            var image = GetImageInfo(type, index);            if (image == null)            {                ImageInfos = ImageInfos.Concat(new[] { GetImageInfo(file, type) }).ToArray();            }            else            {                var imageInfo = GetImageInfo(file, type);                image.Path = file.FullName;                image.DateModified = imageInfo.DateModified;                // reset these values                image.Width = 0;                image.Height = 0;            }        }        /// <summary>        /// Deletes the image.        /// </summary>        /// <param name="type">The type.</param>        /// <param name="index">The index.</param>        public async Task DeleteImageAsync(ImageType type, int index)        {            var info = GetImageInfo(type, index);            if (info == null)            {                // Nothing to do                return;            }            // Remove it from the item            RemoveImage(info);            if (info.IsLocalFile)            {                FileSystem.DeleteFile(info.Path);            }            await UpdateToRepositoryAsync(ItemUpdateType.ImageUpdate, CancellationToken.None).ConfigureAwait(false);        }        public void RemoveImage(ItemImageInfo image)        {            RemoveImages(new List<ItemImageInfo> { image });        }        public void RemoveImages(List<ItemImageInfo> deletedImages)        {            ImageInfos = ImageInfos.Except(deletedImages).ToArray();        }        public virtual Task UpdateToRepositoryAsync(ItemUpdateType updateReason, CancellationToken cancellationToken)         => LibraryManager.UpdateItemAsync(this, GetParent(), updateReason, cancellationToken);        /// <summary>        /// Validates that images within the item are still on the filesystem.        /// </summary>        public bool ValidateImages(IDirectoryService directoryService)        {            var allFiles = ImageInfos                .Where(i => i.IsLocalFile)                .Select(i => System.IO.Path.GetDirectoryName(i.Path))                .Distinct(StringComparer.OrdinalIgnoreCase)                .SelectMany(i => directoryService.GetFilePaths(i))                .ToList();            var deletedImages = ImageInfos                .Where(image => image.IsLocalFile && !allFiles.Contains(image.Path, StringComparer.OrdinalIgnoreCase))                .ToList();            if (deletedImages.Count > 0)            {                ImageInfos = ImageInfos.Except(deletedImages).ToArray();            }            return deletedImages.Count > 0;        }        /// <summary>        /// Gets the image path.        /// </summary>        /// <param name="imageType">Type of the image.</param>        /// <param name="imageIndex">Index of the image.</param>        /// <returns>System.String.</returns>        /// <exception cref="InvalidOperationException">        /// </exception>        /// <exception cref="ArgumentNullException">item</exception>        public string GetImagePath(ImageType imageType, int imageIndex)            => GetImageInfo(imageType, imageIndex)?.Path;        /// <summary>        /// Gets the image information.        /// </summary>        /// <param name="imageType">Type of the image.</param>        /// <param name="imageIndex">Index of the image.</param>        /// <returns>ItemImageInfo.</returns>        public ItemImageInfo GetImageInfo(ImageType imageType, int imageIndex)        {            if (imageType == ImageType.Chapter)            {                var chapter = ItemRepository.GetChapter(this, imageIndex);                if (chapter == null)                {                    return null;                }                var path = chapter.ImagePath;                if (string.IsNullOrEmpty(path))                {                    return null;                }                return new ItemImageInfo                {                    Path = path,                    DateModified = chapter.ImageDateModified,                    Type = imageType                };            }            return GetImages(imageType)                .ElementAtOrDefault(imageIndex);        }        /// <summary>        /// Computes image index for given image or raises if no matching image found.        /// </summary>        /// <param name="image">Image to compute index for.</param>        /// <exception cref="ArgumentException">Image index cannot be computed as no matching image found.        /// </exception>        /// <returns>Image index.</returns>        public int GetImageIndex(ItemImageInfo image)        {            if (image == null)            {                throw new ArgumentNullException(nameof(image));            }            if (image.Type == ImageType.Chapter)            {                var chapters = ItemRepository.GetChapters(this);                for (var i = 0; i < chapters.Count; i++)                {                    if (chapters[i].ImagePath == image.Path)                    {                        return i;                    }                }                throw new ArgumentException("No chapter index found for image path", image.Path);            }            var images = GetImages(image.Type).ToArray();            for (var i = 0; i < images.Length; i++)            {                if (images[i].Path == image.Path)                {                    return i;                }            }            throw new ArgumentException("No image index found for image path", image.Path);        }        public IEnumerable<ItemImageInfo> GetImages(ImageType imageType)        {            if (imageType == ImageType.Chapter)            {                throw new ArgumentException("No image info for chapter images");            }            return ImageInfos.Where(i => i.Type == imageType);        }        /// <summary>        /// Adds the images.        /// </summary>        /// <param name="imageType">Type of the image.</param>        /// <param name="images">The images.</param>        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>        /// <exception cref="ArgumentException">Cannot call AddImages with chapter images</exception>        public bool AddImages(ImageType imageType, List<FileSystemMetadata> images)        {            if (imageType == ImageType.Chapter)            {                throw new ArgumentException("Cannot call AddImages with chapter images");            }            var existingImages = GetImages(imageType)                .ToList();            var newImageList = new List<FileSystemMetadata>();            var imageAdded = false;            var imageUpdated = false;            foreach (var newImage in images)            {                if (newImage == null)                {                    throw new ArgumentException("null image found in list");                }                var existing = existingImages                    .FirstOrDefault(i => string.Equals(i.Path, newImage.FullName, StringComparison.OrdinalIgnoreCase));                if (existing == null)                {                    newImageList.Add(newImage);                    imageAdded = true;                }                else                {                    if (existing.IsLocalFile)                    {                        var newDateModified = FileSystem.GetLastWriteTimeUtc(newImage);                        // If date changed then we need to reset saved image dimensions                        if (existing.DateModified != newDateModified && (existing.Width > 0 || existing.Height > 0))                        {                            existing.Width = 0;                            existing.Height = 0;                            imageUpdated = true;                        }                        existing.DateModified = newDateModified;                    }                }            }            if (imageAdded || images.Count != existingImages.Count)            {                var newImagePaths = images.Select(i => i.FullName).ToList();                var deleted = existingImages                    .Where(i => i.IsLocalFile && !newImagePaths.Contains(i.Path, StringComparer.OrdinalIgnoreCase) && !File.Exists(i.Path))                    .ToList();                if (deleted.Count > 0)                {                    ImageInfos = ImageInfos.Except(deleted).ToArray();                }            }            if (newImageList.Count > 0)            {                ImageInfos = ImageInfos.Concat(newImageList.Select(i => GetImageInfo(i, imageType))).ToArray();            }            return imageUpdated || newImageList.Count > 0;        }        private ItemImageInfo GetImageInfo(FileSystemMetadata file, ImageType type)        {            return new ItemImageInfo            {                Path = file.FullName,                Type = type,                DateModified = FileSystem.GetLastWriteTimeUtc(file)            };        }        /// <summary>        /// Gets the file system path to delete when the item is to be deleted.        /// </summary>        /// <returns></returns>        public virtual IEnumerable<FileSystemMetadata> GetDeletePaths()        {            return new[] {                new FileSystemMetadata                {                    FullName = Path,                    IsDirectory = IsFolder                }            }.Concat(GetLocalMetadataFilesToDelete());        }        protected List<FileSystemMetadata> GetLocalMetadataFilesToDelete()        {            if (IsFolder || !IsInMixedFolder)            {                return new List<FileSystemMetadata>();            }            var filename = System.IO.Path.GetFileNameWithoutExtension(Path);            return FileSystem.GetFiles(System.IO.Path.GetDirectoryName(Path), _supportedExtensions, false, false)                .Where(i => System.IO.Path.GetFileNameWithoutExtension(i.FullName).StartsWith(filename, StringComparison.OrdinalIgnoreCase))                .ToList();        }        public bool AllowsMultipleImages(ImageType type)        {            return type == ImageType.Backdrop || type == ImageType.Screenshot || type == ImageType.Chapter;        }        public Task SwapImagesAsync(ImageType type, int index1, int index2)        {            if (!AllowsMultipleImages(type))            {                throw new ArgumentException("The change index operation is only applicable to backdrops and screen shots");            }            var info1 = GetImageInfo(type, index1);            var info2 = GetImageInfo(type, index2);            if (info1 == null || info2 == null)            {                // Nothing to do                return Task.CompletedTask;            }            if (!info1.IsLocalFile || !info2.IsLocalFile)            {                // TODO: Not supported  yet                return Task.CompletedTask;            }            var path1 = info1.Path;            var path2 = info2.Path;            FileSystem.SwapFiles(path1, path2);            // Refresh these values            info1.DateModified = FileSystem.GetLastWriteTimeUtc(info1.Path);            info2.DateModified = FileSystem.GetLastWriteTimeUtc(info2.Path);            info1.Width = 0;            info1.Height = 0;            info2.Width = 0;            info2.Height = 0;            return UpdateToRepositoryAsync(ItemUpdateType.ImageUpdate, CancellationToken.None);        }        public virtual bool IsPlayed(User user)        {            var userdata = UserDataManager.GetUserData(user, this);            return userdata != null && userdata.Played;        }        public bool IsFavoriteOrLiked(User user)        {            var userdata = UserDataManager.GetUserData(user, this);            return userdata != null && (userdata.IsFavorite || (userdata.Likes ?? false));        }        public virtual bool IsUnplayed(User user)        {            if (user == null)            {                throw new ArgumentNullException(nameof(user));            }            var userdata = UserDataManager.GetUserData(user, this);            return userdata == null || !userdata.Played;        }        ItemLookupInfo IHasLookupInfo<ItemLookupInfo>.GetLookupInfo()        {            return GetItemLookupInfo<ItemLookupInfo>();        }        protected T GetItemLookupInfo<T>()            where T : ItemLookupInfo, new()        {            return new T            {                Path = Path,                MetadataCountryCode = GetPreferredMetadataCountryCode(),                MetadataLanguage = GetPreferredMetadataLanguage(),                Name = GetNameForMetadataLookup(),                ProviderIds = ProviderIds,                IndexNumber = IndexNumber,                ParentIndexNumber = ParentIndexNumber,                Year = ProductionYear,                PremiereDate = PremiereDate            };        }        protected virtual string GetNameForMetadataLookup()        {            return Name;        }        /// <summary>        /// This is called before any metadata refresh and returns true if changes were made.        /// </summary>        public virtual bool BeforeMetadataRefresh(bool replaceAllMetdata)        {            _sortName = null;            var hasChanges = false;            if (string.IsNullOrEmpty(Name) && !string.IsNullOrEmpty(Path))            {                Name = System.IO.Path.GetFileNameWithoutExtension(Path);                hasChanges = true;            }            return hasChanges;        }        protected static string GetMappedPath(BaseItem item, string path, MediaProtocol? protocol)        {            if (protocol.HasValue && protocol.Value == MediaProtocol.File)            {                return LibraryManager.GetPathAfterNetworkSubstitution(path, item);            }            return path;        }        public virtual void FillUserDataDtoValues(UserItemDataDto dto, UserItemData userData, BaseItemDto itemDto, User user, DtoOptions fields)        {            if (RunTimeTicks.HasValue)            {                double pct = RunTimeTicks.Value;                if (pct > 0)                {                    pct = userData.PlaybackPositionTicks / pct;                    if (pct > 0)                    {                        dto.PlayedPercentage = 100 * pct;                    }                }            }        }        protected Task RefreshMetadataForOwnedItem(BaseItem ownedItem, bool copyTitleMetadata, MetadataRefreshOptions options, CancellationToken cancellationToken)        {            var newOptions = new MetadataRefreshOptions(options);            newOptions.SearchResult = null;            var item = this;            if (copyTitleMetadata)            {                // Take some data from the main item, for querying purposes                if (!item.Genres.SequenceEqual(ownedItem.Genres, StringComparer.Ordinal))                {                    newOptions.ForceSave = true;                    ownedItem.Genres = item.Genres;                }                if (!item.Studios.SequenceEqual(ownedItem.Studios, StringComparer.Ordinal))                {                    newOptions.ForceSave = true;                    ownedItem.Studios = item.Studios;                }                if (!item.ProductionLocations.SequenceEqual(ownedItem.ProductionLocations, StringComparer.Ordinal))                {                    newOptions.ForceSave = true;                    ownedItem.ProductionLocations = item.ProductionLocations;                }                if (item.CommunityRating != ownedItem.CommunityRating)                {                    ownedItem.CommunityRating = item.CommunityRating;                    newOptions.ForceSave = true;                }                if (item.CriticRating != ownedItem.CriticRating)                {                    ownedItem.CriticRating = item.CriticRating;                    newOptions.ForceSave = true;                }                if (!string.Equals(item.Overview, ownedItem.Overview, StringComparison.Ordinal))                {                    ownedItem.Overview = item.Overview;                    newOptions.ForceSave = true;                }                if (!string.Equals(item.OfficialRating, ownedItem.OfficialRating, StringComparison.Ordinal))                {                    ownedItem.OfficialRating = item.OfficialRating;                    newOptions.ForceSave = true;                }                if (!string.Equals(item.CustomRating, ownedItem.CustomRating, StringComparison.Ordinal))                {                    ownedItem.CustomRating = item.CustomRating;                    newOptions.ForceSave = true;                }            }            return ownedItem.RefreshMetadata(newOptions, cancellationToken);        }        protected Task RefreshMetadataForOwnedVideo(MetadataRefreshOptions options, bool copyTitleMetadata, string path, CancellationToken cancellationToken)        {            var newOptions = new MetadataRefreshOptions(options);            newOptions.SearchResult = null;            var id = LibraryManager.GetNewItemId(path, typeof(Video));            // Try to retrieve it from the db. If we don't find it, use the resolved version            var video = LibraryManager.GetItemById(id) as Video;            if (video == null)            {                video = LibraryManager.ResolvePath(FileSystem.GetFileSystemInfo(path)) as Video;                newOptions.ForceSave = true;            }            // var parentId = Id;            // if (!video.IsOwnedItem || video.ParentId != parentId)            //{            //    video.IsOwnedItem = true;            //    video.ParentId = parentId;            //    newOptions.ForceSave = true;            //}            if (video == null)            {                return Task.FromResult(true);            }            return RefreshMetadataForOwnedItem(video, copyTitleMetadata, newOptions, cancellationToken);        }        public string GetEtag(User user)        {            var list = GetEtagValues(user);            return string.Join("|", list).GetMD5().ToString("N", CultureInfo.InvariantCulture);        }        protected virtual List<string> GetEtagValues(User user)        {            return new List<string>            {                DateLastSaved.Ticks.ToString(CultureInfo.InvariantCulture)            };        }        public virtual IEnumerable<Guid> GetAncestorIds()        {            return GetParents().Select(i => i.Id).Concat(LibraryManager.GetCollectionFolders(this).Select(i => i.Id));        }        public BaseItem GetTopParent()        {            if (IsTopParent)            {                return this;            }            return GetParents().FirstOrDefault(parent => parent.IsTopParent);        }        [JsonIgnore]        public virtual bool IsTopParent        {            get            {                if (this is BasePluginFolder || this is Channel)                {                    return true;                }                if (this is IHasCollectionType view)                {                    if (string.Equals(view.CollectionType, CollectionType.LiveTv, StringComparison.OrdinalIgnoreCase))                    {                        return true;                    }                }                if (GetParent() is AggregateFolder)                {                    return true;                }                return false;            }        }        [JsonIgnore]        public virtual bool SupportsAncestors => true;        [JsonIgnore]        public virtual bool StopRefreshIfLocalMetadataFound => true;        public virtual IEnumerable<Guid> GetIdsForAncestorQuery()        {            return new[] { Id };        }        public virtual List<ExternalUrl> GetRelatedUrls()        {            return new List<ExternalUrl>();        }        public virtual double? GetRefreshProgress()        {            return null;        }        public virtual ItemUpdateType OnMetadataChanged()        {            var updateType = ItemUpdateType.None;            var item = this;            var inheritedParentalRatingValue = item.GetInheritedParentalRatingValue() ?? 0;            if (inheritedParentalRatingValue != item.InheritedParentalRatingValue)            {                item.InheritedParentalRatingValue = inheritedParentalRatingValue;                updateType |= ItemUpdateType.MetadataImport;            }            return updateType;        }        /// <summary>        /// Updates the official rating based on content and returns true or false indicating if it changed.        /// </summary>        /// <returns></returns>        public bool UpdateRatingToItems(IList<BaseItem> children)        {            var currentOfficialRating = OfficialRating;            // Gather all possible ratings            var ratings = children                .Select(i => i.OfficialRating)                .Where(i => !string.IsNullOrEmpty(i))                .Distinct(StringComparer.OrdinalIgnoreCase)                .Select(i => new Tuple<string, int?>(i, LocalizationManager.GetRatingLevel(i)))                .OrderBy(i => i.Item2 ?? 1000)                .Select(i => i.Item1);            OfficialRating = ratings.FirstOrDefault() ?? currentOfficialRating;            return !string.Equals(currentOfficialRating ?? string.Empty, OfficialRating ?? string.Empty,                StringComparison.OrdinalIgnoreCase);        }        public IEnumerable<BaseItem> GetThemeSongs()        {            return ThemeSongIds.Select(LibraryManager.GetItemById);        }        public IEnumerable<BaseItem> GetThemeVideos()        {            return ThemeVideoIds.Select(LibraryManager.GetItemById);        }        /// <summary>        /// Gets or sets the remote trailers.        /// </summary>        /// <value>The remote trailers.</value>        public IReadOnlyList<MediaUrl> RemoteTrailers { get; set; }        /// <summary>        /// Get all extras associated with this item, sorted by <see cref="SortName"/>.        /// </summary>        /// <returns>An enumerable containing the items.</returns>        public IEnumerable<BaseItem> GetExtras()        {            return ExtraIds                .Select(LibraryManager.GetItemById)                .Where(i => i != null)                .OrderBy(i => i.SortName);        }        /// <summary>        /// Get all extras with specific types that are associated with this item.        /// </summary>        /// <param name="extraTypes">The types of extras to retrieve.</param>        /// <returns>An enumerable containing the extras.</returns>        public IEnumerable<BaseItem> GetExtras(IReadOnlyCollection<ExtraType> extraTypes)        {            return ExtraIds                .Select(LibraryManager.GetItemById)                .Where(i => i != null)                .Where(i => i.ExtraType.HasValue && extraTypes.Contains(i.ExtraType.Value));        }        public IEnumerable<BaseItem> GetTrailers()        {            if (this is IHasTrailers)            {                return ((IHasTrailers)this).LocalTrailerIds.Select(LibraryManager.GetItemById).Where(i => i != null).OrderBy(i => i.SortName);            }            else            {                return Array.Empty<BaseItem>();            }        }        public virtual bool IsHD => Height >= 720;        public bool IsShortcut { get; set; }        public string ShortcutPath { get; set; }        public int Width { get; set; }        public int Height { get; set; }        public Guid[] ExtraIds { get; set; }        public virtual long GetRunTimeTicksForPlayState()        {            return RunTimeTicks ?? 0;        }        /// <summary>        /// Extra types that should be counted and displayed as "Special Features" in the UI.        /// </summary>        public static readonly IReadOnlyCollection<ExtraType> DisplayExtraTypes = new HashSet<ExtraType>        {            Model.Entities.ExtraType.Unknown,            Model.Entities.ExtraType.BehindTheScenes,            Model.Entities.ExtraType.Clip,            Model.Entities.ExtraType.DeletedScene,            Model.Entities.ExtraType.Interview,            Model.Entities.ExtraType.Sample,            Model.Entities.ExtraType.Scene        };        public virtual bool SupportsExternalTransfer => false;        /// <inheritdoc />        public override bool Equals(object obj)        {            return obj is BaseItem baseItem && this.Equals(baseItem);        }        /// <inheritdoc />        public bool Equals(BaseItem item) => Object.Equals(Id, item?.Id);        /// <inheritdoc />        public override int GetHashCode() => HashCode.Combine(Id);    }}
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