Merge branch 'master' into websocket

30 files changed, 407 insertions, 439 deletions

diff --git a/Emby.Server.Implementations/Library/DefaultAuthenticationProvider.cs b/Emby.Server.Implementations/Library/DefaultAuthenticationProvider.cs
index ab036eca7..52c8facc3 100644
--- a/Emby.Server.Implementations/Library/DefaultAuthenticationProvider.cs
+++ b/Emby.Server.Implementations/Library/DefaultAuthenticationProvider.cs
@@ -47,7 +47,7 @@ namespace Emby.Server.Implementations.Library
         {
             if (resolvedUser == null)
             {
-                throw new ArgumentNullException(nameof(resolvedUser));
+                throw new AuthenticationException($"Specified user does not exist.");
             }
 
             bool success = false;
diff --git a/Emby.Server.Implementations/Library/ExclusiveLiveStream.cs b/Emby.Server.Implementations/Library/ExclusiveLiveStream.cs
index 3eb64c29c..9a7186898 100644
--- a/Emby.Server.Implementations/Library/ExclusiveLiveStream.cs
+++ b/Emby.Server.Implementations/Library/ExclusiveLiveStream.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Globalization;
diff --git a/Emby.Server.Implementations/Library/LibraryManager.cs b/Emby.Server.Implementations/Library/LibraryManager.cs
index ae3cdece9..0b86b2db7 100644
--- a/Emby.Server.Implementations/Library/LibraryManager.cs
+++ b/Emby.Server.Implementations/Library/LibraryManager.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Concurrent;
@@ -29,14 +28,15 @@ using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.IO;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
+using MediaBrowser.Controller.MediaEncoding;
 using MediaBrowser.Controller.Persistence;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Controller.Resolvers;
 using MediaBrowser.Controller.Sorting;
 using MediaBrowser.Model.Configuration;
+using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
-using MediaBrowser.Model.Extensions;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Library;
 using MediaBrowser.Model.Net;
@@ -54,6 +54,29 @@ namespace Emby.Server.Implementations.Library
     /// </summary>
     public class LibraryManager : ILibraryManager
     {
+        private readonly ILogger _logger;
+        private readonly ITaskManager _taskManager;
+        private readonly IUserManager _userManager;
+        private readonly IUserDataManager _userDataRepository;
+        private readonly IServerConfigurationManager _configurationManager;
+        private readonly Lazy<ILibraryMonitor> _libraryMonitorFactory;
+        private readonly Lazy<IProviderManager> _providerManagerFactory;
+        private readonly Lazy<IUserViewManager> _userviewManagerFactory;
+        private readonly IServerApplicationHost _appHost;
+        private readonly IMediaEncoder _mediaEncoder;
+        private readonly IFileSystem _fileSystem;
+        private readonly IItemRepository _itemRepository;
+        private readonly ConcurrentDictionary<Guid, BaseItem> _libraryItemsCache;
+
+        private NamingOptions _namingOptions;
+        private string[] _videoFileExtensions;
+
+        private ILibraryMonitor LibraryMonitor => _libraryMonitorFactory.Value;
+
+        private IProviderManager ProviderManager => _providerManagerFactory.Value;
+
+        private IUserViewManager UserViewManager => _userviewManagerFactory.Value;
+
         /// <summary>
         /// Gets or sets the postscan tasks.
         /// </summary>
@@ -87,12 +110,6 @@ namespace Emby.Server.Implementations.Library
         private IBaseItemComparer[] Comparers { get; set; }
 
         /// <summary>
-        /// Gets or sets the active item repository
-        /// </summary>
-        /// <value>The item repository.</value>
-        public IItemRepository ItemRepository { get; set; }
-
-        /// <summary>
         /// Occurs when [item added].
         /// </summary>
         public event EventHandler<ItemChangeEventArgs> ItemAdded;
@@ -107,87 +124,47 @@ namespace Emby.Server.Implementations.Library
         /// </summary>
         public event EventHandler<ItemChangeEventArgs> ItemRemoved;
 
-        /// <summary>
-        /// The _logger
-        /// </summary>
-        private readonly ILogger _logger;
-
-        /// <summary>
-        /// The _task manager
-        /// </summary>
-        private readonly ITaskManager _taskManager;
-
-        /// <summary>
-        /// The _user manager
-        /// </summary>
-        private readonly IUserManager _userManager;
-
-        /// <summary>
-        /// The _user data repository
-        /// </summary>
-        private readonly IUserDataManager _userDataRepository;
-
-        /// <summary>
-        /// Gets or sets the configuration manager.
-        /// </summary>
-        /// <value>The configuration manager.</value>
-        private IServerConfigurationManager ConfigurationManager { get; set; }
-
-        private readonly Func<ILibraryMonitor> _libraryMonitorFactory;
-        private readonly Func<IProviderManager> _providerManagerFactory;
-        private readonly Func<IUserViewManager> _userviewManager;
         public bool IsScanRunning { get; private set; }
 
-        private IServerApplicationHost _appHost;
-
-        /// <summary>
-        /// The _library items cache
-        /// </summary>
-        private readonly ConcurrentDictionary<Guid, BaseItem> _libraryItemsCache;
-
-        /// <summary>
-        /// Gets the library items cache.
-        /// </summary>
-        /// <value>The library items cache.</value>
-        private ConcurrentDictionary<Guid, BaseItem> LibraryItemsCache => _libraryItemsCache;
-
-        private readonly IFileSystem _fileSystem;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="LibraryManager" /> class.
         /// </summary>
         /// <param name="appHost">The application host</param>
-        /// <param name="loggerFactory">The logger factory.</param>
+        /// <param name="logger">The logger.</param>
         /// <param name="taskManager">The task manager.</param>
         /// <param name="userManager">The user manager.</param>
         /// <param name="configurationManager">The configuration manager.</param>
         /// <param name="userDataRepository">The user data repository.</param>
         public LibraryManager(
             IServerApplicationHost appHost,
-            ILoggerFactory loggerFactory,
+            ILogger<LibraryManager> logger,
             ITaskManager taskManager,
             IUserManager userManager,
             IServerConfigurationManager configurationManager,
             IUserDataManager userDataRepository,
-            Func<ILibraryMonitor> libraryMonitorFactory,
+            Lazy<ILibraryMonitor> libraryMonitorFactory,
             IFileSystem fileSystem,
-            Func<IProviderManager> providerManagerFactory,
-            Func<IUserViewManager> userviewManager)
+            Lazy<IProviderManager> providerManagerFactory,
+            Lazy<IUserViewManager> userviewManagerFactory,
+            IMediaEncoder mediaEncoder,
+            IItemRepository itemRepository)
         {
             _appHost = appHost;
-            _logger = loggerFactory.CreateLogger(nameof(LibraryManager));
+            _logger = logger;
             _taskManager = taskManager;
             _userManager = userManager;
-            ConfigurationManager = configurationManager;
+            _configurationManager = configurationManager;
             _userDataRepository = userDataRepository;
             _libraryMonitorFactory = libraryMonitorFactory;
             _fileSystem = fileSystem;
             _providerManagerFactory = providerManagerFactory;
-            _userviewManager = userviewManager;
+            _userviewManagerFactory = userviewManagerFactory;
+            _mediaEncoder = mediaEncoder;
+            _itemRepository = itemRepository;
 
             _libraryItemsCache = new ConcurrentDictionary<Guid, BaseItem>();
 
-            ConfigurationManager.ConfigurationUpdated += ConfigurationUpdated;
+            _configurationManager.ConfigurationUpdated += ConfigurationUpdated;
 
             RecordConfigurationValues(configurationManager.Configuration);
         }
@@ -266,7 +243,7 @@ namespace Emby.Server.Implementations.Library
         /// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
         private void ConfigurationUpdated(object sender, EventArgs e)
         {
-            var config = ConfigurationManager.Configuration;
+            var config = _configurationManager.Configuration;
 
             var wizardChanged = config.IsStartupWizardCompleted != _wizardCompleted;
 
@@ -300,7 +277,7 @@ namespace Emby.Server.Implementations.Library
                 }
             }
 
-            LibraryItemsCache.AddOrUpdate(item.Id, item, delegate { return item; });
+            _libraryItemsCache.AddOrUpdate(item.Id, item, delegate { return item; });
         }
 
         public void DeleteItem(BaseItem item, DeleteOptions options)
@@ -431,10 +408,10 @@ namespace Emby.Server.Implementations.Library
 
             item.SetParent(null);
 
-            ItemRepository.DeleteItem(item.Id, CancellationToken.None);
+            _itemRepository.DeleteItem(item.Id);
             foreach (var child in children)
             {
-                ItemRepository.DeleteItem(child.Id, CancellationToken.None);
+                _itemRepository.DeleteItem(child.Id);
             }
 
             _libraryItemsCache.TryRemove(item.Id, out BaseItem removed);
@@ -503,15 +480,15 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentNullException(nameof(type));
             }
 
-            if (key.StartsWith(ConfigurationManager.ApplicationPaths.ProgramDataPath, StringComparison.Ordinal))
+            if (key.StartsWith(_configurationManager.ApplicationPaths.ProgramDataPath, StringComparison.Ordinal))
             {
                 // Try to normalize paths located underneath program-data in an attempt to make them more portable
-                key = key.Substring(ConfigurationManager.ApplicationPaths.ProgramDataPath.Length)
+                key = key.Substring(_configurationManager.ApplicationPaths.ProgramDataPath.Length)
                     .TrimStart(new[] { '/', '\\' })
                     .Replace("/", "\\");
             }
 
-            if (forceCaseInsensitive || !ConfigurationManager.Configuration.EnableCaseSensitiveItemIds)
+            if (forceCaseInsensitive || !_configurationManager.Configuration.EnableCaseSensitiveItemIds)
             {
                 key = key.ToLowerInvariant();
             }
@@ -544,7 +521,7 @@ namespace Emby.Server.Implementations.Library
                 collectionType = GetContentTypeOverride(fullPath, true);
             }
 
-            var args = new ItemResolveArgs(ConfigurationManager.ApplicationPaths, directoryService)
+            var args = new ItemResolveArgs(_configurationManager.ApplicationPaths, directoryService)
             {
                 Parent = parent,
                 Path = fullPath,
@@ -708,13 +685,13 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Creates the root media folder
+        /// Creates the root media folder.
         /// </summary>
         /// <returns>AggregateFolder.</returns>
-        /// <exception cref="InvalidOperationException">Cannot create the root folder until plugins have loaded</exception>
+        /// <exception cref="InvalidOperationException">Cannot create the root folder until plugins have loaded.</exception>
         public AggregateFolder CreateRootFolder()
         {
-            var rootFolderPath = ConfigurationManager.ApplicationPaths.RootFolderPath;
+            var rootFolderPath = _configurationManager.ApplicationPaths.RootFolderPath;
 
             Directory.CreateDirectory(rootFolderPath);
 
@@ -728,7 +705,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             // Add in the plug-in folders
-            var path = Path.Combine(ConfigurationManager.ApplicationPaths.DataPath, "playlists");
+            var path = Path.Combine(_configurationManager.ApplicationPaths.DataPath, "playlists");
 
             Directory.CreateDirectory(path);
 
@@ -780,7 +757,7 @@ namespace Emby.Server.Implementations.Library
                 {
                     if (_userRootFolder == null)
                     {
-                        var userRootPath = ConfigurationManager.ApplicationPaths.DefaultUserViewsPath;
+                        var userRootPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
 
                         _logger.LogDebug("Creating userRootPath at {path}", userRootPath);
                         Directory.CreateDirectory(userRootPath);
@@ -822,7 +799,6 @@ namespace Emby.Server.Implementations.Library
         {
             // If this returns multiple items it could be tricky figuring out which one is correct.
             // In most cases, the newest one will be and the others obsolete but not yet cleaned up
-
             if (string.IsNullOrEmpty(path))
             {
                 throw new ArgumentNullException(nameof(path));
@@ -842,7 +818,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Person
+        /// Gets the person.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{Person}.</returns>
@@ -852,7 +828,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Studio
+        /// Gets the studio.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{Studio}.</returns>
@@ -877,7 +853,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Genre
+        /// Gets the genre.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{Genre}.</returns>
@@ -887,7 +863,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets the genre.
+        /// Gets the music genre.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{MusicGenre}.</returns>
@@ -897,7 +873,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Year
+        /// Gets the year.
         /// </summary>
         /// <param name="value">The value.</param>
         /// <returns>Task{Year}.</returns>
@@ -938,7 +914,6 @@ namespace Emby.Server.Implementations.Library
                     IncludeItemTypes = new[] { typeof(T).Name },
                     Name = name,
                     DtoOptions = options
-
                 }).Cast<MusicArtist>()
                 .OrderBy(i => i.IsAccessedByName ? 1 : 0)
                 .Cast<T>()
@@ -976,7 +951,7 @@ namespace Emby.Server.Implementations.Library
               where T : BaseItem, new()
         {
             var path = getPathFn(name);
-            var forceCaseInsensitiveId = ConfigurationManager.Configuration.EnableNormalizedItemByNameIds;
+            var forceCaseInsensitiveId = _configurationManager.Configuration.EnableNormalizedItemByNameIds;
             return GetNewItemIdInternal(path, typeof(T), forceCaseInsensitiveId);
         }
 
@@ -990,7 +965,7 @@ namespace Emby.Server.Implementations.Library
         public Task ValidatePeople(CancellationToken cancellationToken, IProgress<double> progress)
         {
             // Ensure the location is available.
-            Directory.CreateDirectory(ConfigurationManager.ApplicationPaths.PeoplePath);
+            Directory.CreateDirectory(_configurationManager.ApplicationPaths.PeoplePath);
 
             return new PeopleValidator(this, _logger, _fileSystem).ValidatePeople(cancellationToken, progress);
         }
@@ -1027,7 +1002,7 @@ namespace Emby.Server.Implementations.Library
         public async Task ValidateMediaLibraryInternal(IProgress<double> progress, CancellationToken cancellationToken)
         {
             IsScanRunning = true;
-            _libraryMonitorFactory().Stop();
+            LibraryMonitor.Stop();
 
             try
             {
@@ -1035,7 +1010,7 @@ namespace Emby.Server.Implementations.Library
             }
             finally
             {
-                _libraryMonitorFactory().Start();
+                LibraryMonitor.Start();
                 IsScanRunning = false;
             }
         }
@@ -1074,9 +1049,9 @@ namespace Emby.Server.Implementations.Library
 
             var innerProgress = new ActionableProgress<double>();
 
-            innerProgress.RegisterAction(pct => progress.Report(pct * .96));
+            innerProgress.RegisterAction(pct => progress.Report(pct * 0.96));
 
-            // Now validate the entire media library
+            // Validate the entire media library
             await RootFolder.ValidateChildren(innerProgress, cancellationToken, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), recursive: true).ConfigureAwait(false);
 
             progress.Report(96);
@@ -1085,7 +1060,6 @@ namespace Emby.Server.Implementations.Library
 
             innerProgress.RegisterAction(pct => progress.Report(96 + (pct * .04)));
 
-            // Run post-scan tasks
             await RunPostScanTasks(innerProgress, cancellationToken).ConfigureAwait(false);
 
             progress.Report(100);
@@ -1136,7 +1110,7 @@ namespace Emby.Server.Implementations.Library
                 }
                 catch (Exception ex)
                 {
-                    _logger.LogError(ex, "Error running postscan task");
+                    _logger.LogError(ex, "Error running post-scan task");
                 }
 
                 numComplete++;
@@ -1145,7 +1119,7 @@ namespace Emby.Server.Implementations.Library
                 progress.Report(percent * 100);
             }
 
-            ItemRepository.UpdateInheritedValues(cancellationToken);
+            _itemRepository.UpdateInheritedValues(cancellationToken);
 
             progress.Report(100);
         }
@@ -1165,11 +1139,10 @@ namespace Emby.Server.Implementations.Library
             var topLibraryFolders = GetUserRootFolder().Children.ToList();
 
             _logger.LogDebug("Getting refreshQueue");
-            var refreshQueue = includeRefreshState ? _providerManagerFactory().GetRefreshQueue() : null;
+            var refreshQueue = includeRefreshState ? ProviderManager.GetRefreshQueue() : null;
 
-            return _fileSystem.GetDirectoryPaths(ConfigurationManager.ApplicationPaths.DefaultUserViewsPath)
+            return _fileSystem.GetDirectoryPaths(_configurationManager.ApplicationPaths.DefaultUserViewsPath)
                 .Select(dir => GetVirtualFolderInfo(dir, topLibraryFolders, refreshQueue))
-                .OrderBy(i => i.Name)
                 .ToList();
         }
 
@@ -1243,7 +1216,7 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentException("Guid can't be empty", nameof(id));
             }
 
-            if (LibraryItemsCache.TryGetValue(id, out BaseItem item))
+            if (_libraryItemsCache.TryGetValue(id, out BaseItem item))
             {
                 return item;
             }
@@ -1274,7 +1247,7 @@ namespace Emby.Server.Implementations.Library
                 AddUserToQuery(query, query.User, allowExternalContent);
             }
 
-            return ItemRepository.GetItemList(query);
+            return _itemRepository.GetItemList(query);
         }
 
         public List<BaseItem> GetItemList(InternalItemsQuery query)
@@ -1298,7 +1271,7 @@ namespace Emby.Server.Implementations.Library
                 AddUserToQuery(query, query.User);
             }
 
-            return ItemRepository.GetCount(query);
+            return _itemRepository.GetCount(query);
         }
 
         public List<BaseItem> GetItemList(InternalItemsQuery query, List<BaseItem> parents)
@@ -1313,7 +1286,7 @@ namespace Emby.Server.Implementations.Library
                 }
             }
 
-            return ItemRepository.GetItemList(query);
+            return _itemRepository.GetItemList(query);
         }
 
         public QueryResult<BaseItem> QueryItems(InternalItemsQuery query)
@@ -1325,12 +1298,12 @@ namespace Emby.Server.Implementations.Library
 
             if (query.EnableTotalRecordCount)
             {
-                return ItemRepository.GetItems(query);
+                return _itemRepository.GetItems(query);
             }
 
             return new QueryResult<BaseItem>
             {
-                Items = ItemRepository.GetItemList(query).ToArray()
+                Items = _itemRepository.GetItemList(query).ToArray()
             };
         }
 
@@ -1341,7 +1314,7 @@ namespace Emby.Server.Implementations.Library
                 AddUserToQuery(query, query.User);
             }
 
-            return ItemRepository.GetItemIdsList(query);
+            return _itemRepository.GetItemIdsList(query);
         }
 
         public QueryResult<(BaseItem, ItemCounts)> GetStudios(InternalItemsQuery query)
@@ -1352,7 +1325,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             SetTopParentOrAncestorIds(query);
-            return ItemRepository.GetStudios(query);
+            return _itemRepository.GetStudios(query);
         }
 
         public QueryResult<(BaseItem, ItemCounts)> GetGenres(InternalItemsQuery query)
@@ -1363,7 +1336,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             SetTopParentOrAncestorIds(query);
-            return ItemRepository.GetGenres(query);
+            return _itemRepository.GetGenres(query);
         }
 
         public QueryResult<(BaseItem, ItemCounts)> GetMusicGenres(InternalItemsQuery query)
@@ -1374,7 +1347,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             SetTopParentOrAncestorIds(query);
-            return ItemRepository.GetMusicGenres(query);
+            return _itemRepository.GetMusicGenres(query);
         }
 
         public QueryResult<(BaseItem, ItemCounts)> GetAllArtists(InternalItemsQuery query)
@@ -1385,7 +1358,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             SetTopParentOrAncestorIds(query);
-            return ItemRepository.GetAllArtists(query);
+            return _itemRepository.GetAllArtists(query);
         }
 
         public QueryResult<(BaseItem, ItemCounts)> GetArtists(InternalItemsQuery query)
@@ -1396,30 +1369,37 @@ namespace Emby.Server.Implementations.Library
             }
 
             SetTopParentOrAncestorIds(query);
-            return ItemRepository.GetArtists(query);
+            return _itemRepository.GetArtists(query);
         }
 
         private void SetTopParentOrAncestorIds(InternalItemsQuery query)
         {
-            if (query.AncestorIds.Length == 0)
+            var ancestorIds = query.AncestorIds;
+            int len = ancestorIds.Length;
+            if (len == 0)
             {
                 return;
             }
 
-            var parents = query.AncestorIds.Select(i => GetItemById(i)).ToList();
-
-            if (parents.All(i => i is ICollectionFolder || i is UserView))
+            var parents = new BaseItem[len];
+            for (int i = 0; i < len; i++)
             {
-                // Optimize by querying against top level views
-                query.TopParentIds = parents.SelectMany(i => GetTopParentIdsForQuery(i, query.User)).ToArray();
-                query.AncestorIds = Array.Empty<Guid>();
-
-                // Prevent searching in all libraries due to empty filter
-                if (query.TopParentIds.Length == 0)
+                parents[i] = GetItemById(ancestorIds[i]);
+                if (!(parents[i] is ICollectionFolder || parents[i] is UserView))
                 {
-                    query.TopParentIds = new[] { Guid.NewGuid() };
+                    return;
                 }
             }
+
+            // Optimize by querying against top level views
+            query.TopParentIds = parents.SelectMany(i => GetTopParentIdsForQuery(i, query.User)).ToArray();
+            query.AncestorIds = Array.Empty<Guid>();
+
+            // Prevent searching in all libraries due to empty filter
+            if (query.TopParentIds.Length == 0)
+            {
+                query.TopParentIds = new[] { Guid.NewGuid() };
+            }
         }
 
         public QueryResult<(BaseItem, ItemCounts)> GetAlbumArtists(InternalItemsQuery query)
@@ -1430,7 +1410,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             SetTopParentOrAncestorIds(query);
-            return ItemRepository.GetAlbumArtists(query);
+            return _itemRepository.GetAlbumArtists(query);
         }
 
         public QueryResult<BaseItem> GetItemsResult(InternalItemsQuery query)
@@ -1451,10 +1431,10 @@ namespace Emby.Server.Implementations.Library
 
             if (query.EnableTotalRecordCount)
             {
-                return ItemRepository.GetItems(query);
+                return _itemRepository.GetItems(query);
             }
 
-            var list = ItemRepository.GetItemList(query);
+            var list = _itemRepository.GetItemList(query);
 
             return new QueryResult<BaseItem>
             {
@@ -1500,7 +1480,7 @@ namespace Emby.Server.Implementations.Library
                 string.IsNullOrEmpty(query.SeriesPresentationUniqueKey) &&
                 query.ItemIds.Length == 0)
             {
-                var userViews = _userviewManager().GetUserViews(new UserViewQuery
+                var userViews = UserViewManager.GetUserViews(new UserViewQuery
                 {
                     UserId = user.Id,
                     IncludeHidden = true,
@@ -1580,7 +1560,7 @@ namespace Emby.Server.Implementations.Library
         public async Task<IEnumerable<Video>> GetIntros(BaseItem item, User user)
         {
             var tasks = IntroProviders
-                .OrderBy(i => i.GetType().Name.IndexOf("Default", StringComparison.OrdinalIgnoreCase) == -1 ? 0 : 1)
+                .OrderBy(i => i.GetType().Name.Contains("Default", StringComparison.OrdinalIgnoreCase) ? 1 : 0)
                 .Take(1)
                 .Select(i => GetIntros(i, item, user));
 
@@ -1800,7 +1780,7 @@ namespace Emby.Server.Implementations.Library
             // Don't iterate multiple times
             var itemsList = items.ToList();
 
-            ItemRepository.SaveItems(itemsList, cancellationToken);
+            _itemRepository.SaveItems(itemsList, cancellationToken);
 
             foreach (var item in itemsList)
             {
@@ -1837,7 +1817,7 @@ namespace Emby.Server.Implementations.Library
 
         public void UpdateImages(BaseItem item)
         {
-            ItemRepository.SaveImages(item);
+            _itemRepository.SaveImages(item);
 
             RegisterItem(item);
         }
@@ -1854,7 +1834,7 @@ namespace Emby.Server.Implementations.Library
             {
                 if (item.IsFileProtocol)
                 {
-                    _providerManagerFactory().SaveMetadata(item, updateReason);
+                    ProviderManager.SaveMetadata(item, updateReason);
                 }
 
                 item.DateLastSaved = DateTime.UtcNow;
@@ -1862,7 +1842,7 @@ namespace Emby.Server.Implementations.Library
                 RegisterItem(item);
             }
 
-            ItemRepository.SaveItems(itemsList, cancellationToken);
+            _itemRepository.SaveItems(itemsList, cancellationToken);
 
             if (ItemUpdated != null)
             {
@@ -1938,7 +1918,7 @@ namespace Emby.Server.Implementations.Library
         /// <returns>BaseItem.</returns>
         public BaseItem RetrieveItem(Guid id)
         {
-            return ItemRepository.RetrieveItem(id);
+            return _itemRepository.RetrieveItem(id);
         }
 
         public List<Folder> GetCollectionFolders(BaseItem item)
@@ -2057,7 +2037,7 @@ namespace Emby.Server.Implementations.Library
 
         private string GetContentTypeOverride(string path, bool inherit)
         {
-            var nameValuePair = ConfigurationManager.Configuration.ContentTypes
+            var nameValuePair = _configurationManager.Configuration.ContentTypes
                                     .FirstOrDefault(i => _fileSystem.AreEqual(i.Name, path)
                                                          || (inherit && !string.IsNullOrEmpty(i.Name)
                                                                      && _fileSystem.ContainsSubPath(i.Name, path)));
@@ -2106,7 +2086,7 @@ namespace Emby.Server.Implementations.Library
             string sortName)
         {
             var path = Path.Combine(
-                ConfigurationManager.ApplicationPaths.InternalMetadataPath,
+                _configurationManager.ApplicationPaths.InternalMetadataPath,
                 "views",
                 _fileSystem.GetValidFilename(viewType));
 
@@ -2138,7 +2118,7 @@ namespace Emby.Server.Implementations.Library
             if (refresh)
             {
                 item.UpdateToRepository(ItemUpdateType.MetadataImport, CancellationToken.None);
-                _providerManagerFactory().QueueRefresh(item.Id, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), RefreshPriority.Normal);
+                ProviderManager.QueueRefresh(item.Id, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), RefreshPriority.Normal);
             }
 
             return item;
@@ -2156,7 +2136,7 @@ namespace Emby.Server.Implementations.Library
 
             var id = GetNewItemId(idValues, typeof(UserView));
 
-            var path = Path.Combine(ConfigurationManager.ApplicationPaths.InternalMetadataPath, "views", id.ToString("N", CultureInfo.InvariantCulture));
+            var path = Path.Combine(_configurationManager.ApplicationPaths.InternalMetadataPath, "views", id.ToString("N", CultureInfo.InvariantCulture));
 
             var item = GetItemById(id) as UserView;
 
@@ -2193,7 +2173,7 @@ namespace Emby.Server.Implementations.Library
 
             if (refresh)
             {
-                _providerManagerFactory().QueueRefresh(
+                ProviderManager.QueueRefresh(
                     item.Id,
                     new MetadataRefreshOptions(new DirectoryService(_fileSystem))
                     {
@@ -2260,7 +2240,7 @@ namespace Emby.Server.Implementations.Library
 
             if (refresh)
             {
-                _providerManagerFactory().QueueRefresh(
+                ProviderManager.QueueRefresh(
                     item.Id,
                     new MetadataRefreshOptions(new DirectoryService(_fileSystem))
                     {
@@ -2294,7 +2274,7 @@ namespace Emby.Server.Implementations.Library
 
             var id = GetNewItemId(idValues, typeof(UserView));
 
-            var path = Path.Combine(ConfigurationManager.ApplicationPaths.InternalMetadataPath, "views", id.ToString("N", CultureInfo.InvariantCulture));
+            var path = Path.Combine(_configurationManager.ApplicationPaths.InternalMetadataPath, "views", id.ToString("N", CultureInfo.InvariantCulture));
 
             var item = GetItemById(id) as UserView;
 
@@ -2337,7 +2317,7 @@ namespace Emby.Server.Implementations.Library
 
             if (refresh)
             {
-                _providerManagerFactory().QueueRefresh(
+                ProviderManager.QueueRefresh(
                     item.Id,
                     new MetadataRefreshOptions(new DirectoryService(_fileSystem))
                     {
@@ -2355,36 +2335,25 @@ namespace Emby.Server.Implementations.Library
             string videoPath,
             string[] files)
         {
-            new SubtitleResolver(BaseItem.LocalizationManager, _fileSystem).AddExternalSubtitleStreams(streams, videoPath, streams.Count, files);
+            new SubtitleResolver(BaseItem.LocalizationManager).AddExternalSubtitleStreams(streams, videoPath, streams.Count, files);
         }
 
-        public bool IsVideoFile(string path, LibraryOptions libraryOptions)
+        /// <inheritdoc />
+        public bool IsVideoFile(string path)
         {
             var resolver = new VideoResolver(GetNamingOptions());
             return resolver.IsVideoFile(path);
         }
 
-        public bool IsVideoFile(string path)
-        {
-            return IsVideoFile(path, new LibraryOptions());
-        }
-
-        public bool IsAudioFile(string path, LibraryOptions libraryOptions)
-        {
-            var parser = new AudioFileParser(GetNamingOptions());
-            return parser.IsAudioFile(path);
-        }
-
+        /// <inheritdoc />
         public bool IsAudioFile(string path)
-        {
-            return IsAudioFile(path, new LibraryOptions());
-        }
+            => AudioFileParser.IsAudioFile(path, GetNamingOptions());
 
+        /// <inheritdoc />
         public int? GetSeasonNumberFromPath(string path)
-        {
-            return new SeasonPathParser().Parse(path, true, true).SeasonNumber;
-        }
+            => SeasonPathParser.Parse(path, true, true).SeasonNumber;
 
+        /// <inheritdoc />
         public bool FillMissingEpisodeNumbersFromPath(Episode episode, bool forceRefresh)
         {
             var series = episode.Series;
@@ -2408,6 +2377,38 @@ namespace Emby.Server.Implementations.Library
                 episodeInfo = new Naming.TV.EpisodeInfo();
             }
 
+            try
+            {
+                var libraryOptions = GetLibraryOptions(episode);
+                if (libraryOptions.EnableEmbeddedEpisodeInfos && string.Equals(episodeInfo.Container, "mp4", StringComparison.OrdinalIgnoreCase))
+                {
+                    // Read from metadata
+                    var mediaInfo = _mediaEncoder.GetMediaInfo(new MediaInfoRequest
+                    {
+                        MediaSource = episode.GetMediaSources(false)[0],
+                        MediaType = DlnaProfileType.Video
+                    }, CancellationToken.None).GetAwaiter().GetResult();
+                    if (mediaInfo.ParentIndexNumber > 0)
+                    {
+                        episodeInfo.SeasonNumber = mediaInfo.ParentIndexNumber;
+                    }
+
+                    if (mediaInfo.IndexNumber > 0)
+                    {
+                        episodeInfo.EpisodeNumber = mediaInfo.IndexNumber;
+                    }
+
+                    if (!string.IsNullOrEmpty(mediaInfo.ShowName))
+                    {
+                        episodeInfo.SeriesName = mediaInfo.ShowName;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error reading the episode informations with ffprobe. Episode: {EpisodeInfo}", episodeInfo.Path);
+            }
+
             var changed = false;
 
             if (episodeInfo.IsByDate)
@@ -2509,20 +2510,10 @@ namespace Emby.Server.Implementations.Library
 
         public NamingOptions GetNamingOptions()
         {
-            return GetNamingOptionsInternal();
-        }
-
-        private NamingOptions _namingOptions;
-        private string[] _videoFileExtensions;
-
-        private NamingOptions GetNamingOptionsInternal()
-        {
             if (_namingOptions == null)
             {
-                var options = new NamingOptions();
-
-                _namingOptions = options;
-                _videoFileExtensions = _namingOptions.VideoFileExtensions.ToArray();
+                _namingOptions = new NamingOptions();
+                _videoFileExtensions = _namingOptions.VideoFileExtensions;
             }
 
             return _namingOptions;
@@ -2533,11 +2524,10 @@ namespace Emby.Server.Implementations.Library
             var resolver = new VideoResolver(GetNamingOptions());
 
             var result = resolver.CleanDateTime(name);
-            var cleanName = resolver.CleanString(result.Name);
 
             return new ItemLookupInfo
             {
-                Name = cleanName.Name,
+                Name = resolver.TryCleanString(result.Name, out var newName) ? newName.ToString() : result.Name,
                 Year = result.Year
             };
         }
@@ -2590,14 +2580,12 @@ namespace Emby.Server.Implementations.Library
                 }).OrderBy(i => i.Path);
         }
 
-        private static readonly string[] ExtrasSubfolderNames = new[] { "extras", "specials", "shorts", "scenes", "featurettes", "behind the scenes", "deleted scenes", "interviews" };
-
         public IEnumerable<Video> FindExtras(BaseItem owner, List<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)
         {
             var namingOptions = GetNamingOptions();
 
             var files = owner.IsInMixedFolder ? new List<FileSystemMetadata>() : fileSystemChildren.Where(i => i.IsDirectory)
-                .Where(i => ExtrasSubfolderNames.Contains(i.Name ?? string.Empty, StringComparer.OrdinalIgnoreCase))
+                .Where(i => BaseItem.AllExtrasTypesFolderNames.Contains(i.Name ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 .SelectMany(i => _fileSystem.GetFiles(i.FullName, _videoFileExtensions, false, false))
                 .ToList();
 
@@ -2658,8 +2646,8 @@ namespace Emby.Server.Implementations.Library
                 }
             }
 
-            var metadataPath = ConfigurationManager.Configuration.MetadataPath;
-            var metadataNetworkPath = ConfigurationManager.Configuration.MetadataNetworkPath;
+            var metadataPath = _configurationManager.Configuration.MetadataPath;
+            var metadataNetworkPath = _configurationManager.Configuration.MetadataNetworkPath;
 
             if (!string.IsNullOrWhiteSpace(metadataPath) && !string.IsNullOrWhiteSpace(metadataNetworkPath))
             {
@@ -2670,7 +2658,7 @@ namespace Emby.Server.Implementations.Library
                 }
             }
 
-            foreach (var map in ConfigurationManager.Configuration.PathSubstitutions)
+            foreach (var map in _configurationManager.Configuration.PathSubstitutions)
             {
                 if (!string.IsNullOrWhiteSpace(map.From))
                 {
@@ -2739,7 +2727,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<PersonInfo> GetPeople(InternalPeopleQuery query)
         {
-            return ItemRepository.GetPeople(query);
+            return _itemRepository.GetPeople(query);
         }
 
         public List<PersonInfo> GetPeople(BaseItem item)
@@ -2762,7 +2750,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<Person> GetPeopleItems(InternalPeopleQuery query)
         {
-            return ItemRepository.GetPeopleNames(query).Select(i =>
+            return _itemRepository.GetPeopleNames(query).Select(i =>
             {
                 try
                 {
@@ -2779,7 +2767,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<string> GetPeopleNames(InternalPeopleQuery query)
         {
-            return ItemRepository.GetPeopleNames(query);
+            return _itemRepository.GetPeopleNames(query);
         }
 
         public void UpdatePeople(BaseItem item, List<PersonInfo> people)
@@ -2789,7 +2777,7 @@ namespace Emby.Server.Implementations.Library
                 return;
             }
 
-            ItemRepository.UpdatePeople(item.Id, people);
+            _itemRepository.UpdatePeople(item.Id, people);
         }
 
         public async Task<ItemImageInfo> ConvertImageToLocal(BaseItem item, ItemImageInfo image, int imageIndex)
@@ -2800,7 +2788,7 @@ namespace Emby.Server.Implementations.Library
                 {
                     _logger.LogDebug("ConvertImageToLocal item {0} - image url: {1}", item.Id, url);
 
-                    await _providerManagerFactory().SaveImage(item, url, image.Type, imageIndex, CancellationToken.None).ConfigureAwait(false);
+                    await ProviderManager.SaveImage(item, url, image.Type, imageIndex, CancellationToken.None).ConfigureAwait(false);
 
                     item.UpdateToRepository(ItemUpdateType.ImageUpdate, CancellationToken.None);
 
@@ -2833,7 +2821,7 @@ namespace Emby.Server.Implementations.Library
 
             name = _fileSystem.GetValidFilename(name);
 
-            var rootFolderPath = ConfigurationManager.ApplicationPaths.DefaultUserViewsPath;
+            var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
 
             var virtualFolderPath = Path.Combine(rootFolderPath, name);
             while (Directory.Exists(virtualFolderPath))
@@ -2852,7 +2840,7 @@ namespace Emby.Server.Implementations.Library
                 }
             }
 
-            _libraryMonitorFactory().Stop();
+            LibraryMonitor.Stop();
 
             try
             {
@@ -2887,7 +2875,7 @@ namespace Emby.Server.Implementations.Library
                 {
                     // Need to add a delay here or directory watchers may still pick up the changes
                     await Task.Delay(1000).ConfigureAwait(false);
-                    _libraryMonitorFactory().Start();
+                    LibraryMonitor.Start();
                 }
             }
         }
@@ -2947,7 +2935,7 @@ namespace Emby.Server.Implementations.Library
                 throw new FileNotFoundException("The network path does not exist.");
             }
 
-            var rootFolderPath = ConfigurationManager.ApplicationPaths.DefaultUserViewsPath;
+            var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
             var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
 
             var shortcutFilename = Path.GetFileNameWithoutExtension(path);
@@ -2990,7 +2978,7 @@ namespace Emby.Server.Implementations.Library
                 throw new FileNotFoundException("The network path does not exist.");
             }
 
-            var rootFolderPath = ConfigurationManager.ApplicationPaths.DefaultUserViewsPath;
+            var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
             var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
 
             var libraryOptions = CollectionFolder.GetLibraryOptions(virtualFolderPath);
@@ -3043,7 +3031,7 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentNullException(nameof(name));
             }
 
-            var rootFolderPath = ConfigurationManager.ApplicationPaths.DefaultUserViewsPath;
+            var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
 
             var path = Path.Combine(rootFolderPath, name);
 
@@ -3052,7 +3040,7 @@ namespace Emby.Server.Implementations.Library
                 throw new FileNotFoundException("The media folder does not exist");
             }
 
-            _libraryMonitorFactory().Stop();
+            LibraryMonitor.Stop();
 
             try
             {
@@ -3072,7 +3060,7 @@ namespace Emby.Server.Implementations.Library
                 {
                     // Need to add a delay here or directory watchers may still pick up the changes
                     await Task.Delay(1000).ConfigureAwait(false);
-                    _libraryMonitorFactory().Start();
+                    LibraryMonitor.Start();
                 }
             }
         }
@@ -3086,7 +3074,7 @@ namespace Emby.Server.Implementations.Library
 
             var removeList = new List<NameValuePair>();
 
-            foreach (var contentType in ConfigurationManager.Configuration.ContentTypes)
+            foreach (var contentType in _configurationManager.Configuration.ContentTypes)
             {
                 if (string.IsNullOrWhiteSpace(contentType.Name))
                 {
@@ -3101,11 +3089,11 @@ namespace Emby.Server.Implementations.Library
 
             if (removeList.Count > 0)
             {
-                ConfigurationManager.Configuration.ContentTypes = ConfigurationManager.Configuration.ContentTypes
+                _configurationManager.Configuration.ContentTypes = _configurationManager.Configuration.ContentTypes
                     .Except(removeList)
-                        .ToArray();
+                    .ToArray();
 
-                ConfigurationManager.SaveConfiguration();
+                _configurationManager.SaveConfiguration();
             }
         }
 
@@ -3116,7 +3104,7 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentNullException(nameof(mediaPath));
             }
 
-            var rootFolderPath = ConfigurationManager.ApplicationPaths.DefaultUserViewsPath;
+            var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
             var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
 
             if (!Directory.Exists(virtualFolderPath))
diff --git a/Emby.Server.Implementations/Library/LiveStreamHelper.cs b/Emby.Server.Implementations/Library/LiveStreamHelper.cs
index f28f4a538..ed7d8aa40 100644
--- a/Emby.Server.Implementations/Library/LiveStreamHelper.cs
+++ b/Emby.Server.Implementations/Library/LiveStreamHelper.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
diff --git a/Emby.Server.Implementations/Library/MediaSourceManager.cs b/Emby.Server.Implementations/Library/MediaSourceManager.cs
index e310065b2..01fe98f3a 100644
--- a/Emby.Server.Implementations/Library/MediaSourceManager.cs
+++ b/Emby.Server.Implementations/Library/MediaSourceManager.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
@@ -34,13 +33,13 @@ namespace Emby.Server.Implementations.Library
         private readonly ILibraryManager _libraryManager;
         private readonly IJsonSerializer _jsonSerializer;
         private readonly IFileSystem _fileSystem;
-
-        private IMediaSourceProvider[] _providers;
         private readonly ILogger _logger;
         private readonly IUserDataManager _userDataManager;
-        private readonly Func<IMediaEncoder> _mediaEncoder;
-        private ILocalizationManager _localizationManager;
-        private IApplicationPaths _appPaths;
+        private readonly IMediaEncoder _mediaEncoder;
+        private readonly ILocalizationManager _localizationManager;
+        private readonly IApplicationPaths _appPaths;
+
+        private IMediaSourceProvider[] _providers;
 
         public MediaSourceManager(
             IItemRepository itemRepo,
@@ -48,16 +47,16 @@ namespace Emby.Server.Implementations.Library
             ILocalizationManager localizationManager,
             IUserManager userManager,
             ILibraryManager libraryManager,
-            ILoggerFactory loggerFactory,
+            ILogger<MediaSourceManager> logger,
             IJsonSerializer jsonSerializer,
             IFileSystem fileSystem,
             IUserDataManager userDataManager,
-            Func<IMediaEncoder> mediaEncoder)
+            IMediaEncoder mediaEncoder)
         {
             _itemRepo = itemRepo;
             _userManager = userManager;
             _libraryManager = libraryManager;
-            _logger = loggerFactory.CreateLogger(nameof(MediaSourceManager));
+            _logger = logger;
             _jsonSerializer = jsonSerializer;
             _fileSystem = fileSystem;
             _userDataManager = userDataManager;
@@ -497,7 +496,7 @@ namespace Emby.Server.Implementations.Library
                     // hack - these two values were taken from LiveTVMediaSourceProvider
                     string cacheKey = request.OpenToken;
 
-                    await new LiveStreamHelper(_mediaEncoder(), _logger, _jsonSerializer, _appPaths)
+                    await new LiveStreamHelper(_mediaEncoder, _logger, _jsonSerializer, _appPaths)
                         .AddMediaInfoWithProbe(mediaSource, isAudio, cacheKey, true, cancellationToken)
                         .ConfigureAwait(false);
                 }
@@ -622,7 +621,7 @@ namespace Emby.Server.Implementations.Library
 
             if (liveStreamInfo is IDirectStreamProvider)
             {
-                var info = await _mediaEncoder().GetMediaInfo(new MediaInfoRequest
+                var info = await _mediaEncoder.GetMediaInfo(new MediaInfoRequest
                 {
                     MediaSource = mediaSource,
                     ExtractChapters = false,
@@ -675,7 +674,7 @@ namespace Emby.Server.Implementations.Library
                     mediaSource.AnalyzeDurationMs = 3000;
                 }
 
-                mediaInfo = await _mediaEncoder().GetMediaInfo(new MediaInfoRequest
+                mediaInfo = await _mediaEncoder.GetMediaInfo(new MediaInfoRequest
                 {
                     MediaSource = mediaSource,
                     MediaType = isAudio ? DlnaProfileType.Audio : DlnaProfileType.Video,
diff --git a/Emby.Server.Implementations/Library/MediaStreamSelector.cs b/Emby.Server.Implementations/Library/MediaStreamSelector.cs
index 1652ad974..e27145a1d 100644
--- a/Emby.Server.Implementations/Library/MediaStreamSelector.cs
+++ b/Emby.Server.Implementations/Library/MediaStreamSelector.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
@@ -36,7 +35,8 @@ namespace Emby.Server.Implementations.Library
             return null;
         }
 
-        public static int? GetDefaultSubtitleStreamIndex(List<MediaStream> streams,
+        public static int? GetDefaultSubtitleStreamIndex(
+            List<MediaStream> streams,
             string[] preferredLanguages,
             SubtitlePlaybackMode mode,
             string audioTrackLanguage)
@@ -116,7 +116,8 @@ namespace Emby.Server.Implementations.Library
                  .ThenBy(i => i.Index);
         }
 
-        public static void SetSubtitleStreamScores(List<MediaStream> streams,
+        public static void SetSubtitleStreamScores(
+            List<MediaStream> streams,
             string[] preferredLanguages,
             SubtitlePlaybackMode mode,
             string audioTrackLanguage)
diff --git a/Emby.Server.Implementations/Library/MusicManager.cs b/Emby.Server.Implementations/Library/MusicManager.cs
index 29af6670b..1ec578371 100644
--- a/Emby.Server.Implementations/Library/MusicManager.cs
+++ b/Emby.Server.Implementations/Library/MusicManager.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
diff --git a/Emby.Server.Implementations/Library/PathExtensions.cs b/Emby.Server.Implementations/Library/PathExtensions.cs
index 4fdf73b77..06ff3e611 100644
--- a/Emby.Server.Implementations/Library/PathExtensions.cs
+++ b/Emby.Server.Implementations/Library/PathExtensions.cs
@@ -1,3 +1,5 @@
+#nullable enable
+
 using System;
 using System.Text.RegularExpressions;
 
@@ -12,24 +14,24 @@ namespace Emby.Server.Implementations.Library
         /// Gets the attribute value.
         /// </summary>
         /// <param name="str">The STR.</param>
-        /// <param name="attrib">The attrib.</param>
+        /// <param name="attribute">The attrib.</param>
         /// <returns>System.String.</returns>
-        /// <exception cref="ArgumentNullException">attrib</exception>
-        public static string GetAttributeValue(this string str, string attrib)
+        /// <exception cref="ArgumentException"><paramref name="str" /> or <paramref name="attribute" /> is empty.</exception>
+        public static string? GetAttributeValue(this string str, string attribute)
         {
-            if (string.IsNullOrEmpty(str))
+            if (str.Length == 0)
             {
-                throw new ArgumentNullException(nameof(str));
+                throw new ArgumentException("String can't be empty.", nameof(str));
             }
 
-            if (string.IsNullOrEmpty(attrib))
+            if (attribute.Length == 0)
             {
-                throw new ArgumentNullException(nameof(attrib));
+                throw new ArgumentException("String can't be empty.", nameof(attribute));
             }
 
-            string srch = "[" + attrib + "=";
+            string srch = "[" + attribute + "=";
             int start = str.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
-            if (start > -1)
+            if (start != -1)
             {
                 start += srch.Length;
                 int end = str.IndexOf(']', start);
@@ -37,9 +39,9 @@ namespace Emby.Server.Implementations.Library
             }
 
             // for imdbid we also accept pattern matching
-            if (string.Equals(attrib, "imdbid", StringComparison.OrdinalIgnoreCase))
+            if (string.Equals(attribute, "imdbid", StringComparison.OrdinalIgnoreCase))
             {
-                var m = Regex.Match(str, "tt\\d{7}", RegexOptions.IgnoreCase);
+                var m = Regex.Match(str, "tt([0-9]{7,8})", RegexOptions.IgnoreCase);
                 return m.Success ? m.Value : null;
             }
 
diff --git a/Emby.Server.Implementations/Library/ResolverHelper.cs b/Emby.Server.Implementations/Library/ResolverHelper.cs
index 96d1bff92..7ca15b4e5 100644
--- a/Emby.Server.Implementations/Library/ResolverHelper.cs
+++ b/Emby.Server.Implementations/Library/ResolverHelper.cs
@@ -9,7 +9,7 @@ using MediaBrowser.Model.IO;
 namespace Emby.Server.Implementations.Library
 {
     /// <summary>
-    /// Class ResolverHelper
+    /// Class ResolverHelper.
     /// </summary>
     public static class ResolverHelper
     {
@@ -118,10 +118,12 @@ namespace Emby.Server.Implementations.Library
             {
                 throw new ArgumentNullException(nameof(fileSystem));
             }
+
             if (item == null)
             {
                 throw new ArgumentNullException(nameof(item));
             }
+
             if (args == null)
             {
                 throw new ArgumentNullException(nameof(args));
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
index 7e3b27a12..fefc8e789 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
@@ -73,7 +72,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         {
             // Return audio if the path is a file and has a matching extension
 
-            var libraryOptions = args.GetLibraryOptions();
             var collectionType = args.GetCollectionType();
 
             var isBooksCollectionType = string.Equals(collectionType, CollectionType.Books, StringComparison.OrdinalIgnoreCase);
@@ -92,7 +90,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                 return FindAudio<AudioBook>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, false);
             }
 
-            if (LibraryManager.IsAudioFile(args.Path, libraryOptions))
+            if (LibraryManager.IsAudioFile(args.Path))
             {
                 var extension = Path.GetExtension(args.Path);
 
@@ -105,7 +103,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                 var isMixedCollectionType = string.IsNullOrEmpty(collectionType);
 
                 // For conflicting extensions, give priority to videos
-                if (isMixedCollectionType && LibraryManager.IsVideoFile(args.Path, libraryOptions))
+                if (isMixedCollectionType && LibraryManager.IsVideoFile(args.Path))
                 {
                     return null;
                 }
@@ -121,7 +119,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                 {
                     item = new MediaBrowser.Controller.Entities.Audio.Audio();
                 }
-
                 else if (isBooksCollectionType)
                 {
                     item = new AudioBook();
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
index 4a2d210d5..85b1b6e32 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
@@ -5,7 +5,6 @@ using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Controller.Resolvers;
-using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
 using Microsoft.Extensions.Logging;
@@ -76,15 +75,15 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         }
 
         /// <summary>
-        /// Determine if the supplied file data points to a music album
+        /// Determine if the supplied file data points to a music album.
         /// </summary>
-        public bool IsMusicAlbum(string path, IDirectoryService directoryService, LibraryOptions libraryOptions)
+        public bool IsMusicAlbum(string path, IDirectoryService directoryService)
         {
-            return ContainsMusic(directoryService.GetFileSystemEntries(path), true, directoryService, _logger, _fileSystem, libraryOptions, _libraryManager);
+            return ContainsMusic(directoryService.GetFileSystemEntries(path), true, directoryService, _logger, _fileSystem, _libraryManager);
         }
 
         /// <summary>
-        /// Determine if the supplied resolve args should be considered a music album
+        /// Determine if the supplied resolve args should be considered a music album.
         /// </summary>
         /// <param name="args">The args.</param>
         /// <returns><c>true</c> if [is music album] [the specified args]; otherwise, <c>false</c>.</returns>
@@ -94,7 +93,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
             if (args.IsDirectory)
             {
                 // if (args.Parent is MusicArtist) return true;  //saves us from testing children twice
-                if (ContainsMusic(args.FileSystemChildren, true, args.DirectoryService, _logger, _fileSystem, args.GetLibraryOptions(), _libraryManager))
+                if (ContainsMusic(args.FileSystemChildren, true, args.DirectoryService, _logger, _fileSystem, _libraryManager))
                 {
                     return true;
                 }
@@ -104,7 +103,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         }
 
         /// <summary>
-        /// Determine if the supplied list contains what we should consider music
+        /// Determine if the supplied list contains what we should consider music.
         /// </summary>
         private bool ContainsMusic(
             IEnumerable<FileSystemMetadata> list,
@@ -112,12 +111,13 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
             IDirectoryService directoryService,
             ILogger logger,
             IFileSystem fileSystem,
-            LibraryOptions libraryOptions,
             ILibraryManager libraryManager)
         {
             var discSubfolderCount = 0;
             var notMultiDisc = false;
 
+            var namingOptions = ((LibraryManager)_libraryManager).GetNamingOptions();
+            var parser = new AlbumParser(namingOptions);
             foreach (var fileSystemInfo in list)
             {
                 if (fileSystemInfo.IsDirectory)
@@ -130,11 +130,11 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                         }
 
                         var path = fileSystemInfo.FullName;
-                        var hasMusic = ContainsMusic(directoryService.GetFileSystemEntries(path), false, directoryService, logger, fileSystem, libraryOptions, libraryManager);
+                        var hasMusic = ContainsMusic(directoryService.GetFileSystemEntries(path), false, directoryService, logger, fileSystem, libraryManager);
 
                         if (hasMusic)
                         {
-                            if (IsMultiDiscFolder(path, libraryOptions))
+                            if (parser.IsMultiPart(path))
                             {
                                 logger.LogDebug("Found multi-disc folder: " + path);
                                 discSubfolderCount++;
@@ -151,7 +151,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                 {
                     var fullName = fileSystemInfo.FullName;
 
-                    if (libraryManager.IsAudioFile(fullName, libraryOptions))
+                    if (libraryManager.IsAudioFile(fullName))
                     {
                         return true;
                     }
@@ -165,15 +165,5 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
 
             return discSubfolderCount > 0;
         }
-
-        private bool IsMultiDiscFolder(string path, LibraryOptions libraryOptions)
-        {
-            var namingOptions = ((LibraryManager)_libraryManager).GetNamingOptions();
-
-            var parser = new AlbumParser(namingOptions);
-            var result = parser.ParseMultiPart(path);
-
-            return result.IsMultiPart;
-        }
     }
 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
index ee7e84929..681db4896 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
@@ -27,7 +27,11 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         /// <param name="fileSystem">The file system.</param>
         /// <param name="libraryManager">The library manager.</param>
         /// <param name="config">The configuration manager.</param>
-        public MusicArtistResolver(ILogger logger, IFileSystem fileSystem, ILibraryManager libraryManager, IServerConfigurationManager config)
+        public MusicArtistResolver(
+            ILogger<MusicArtistResolver> logger,
+            IFileSystem fileSystem,
+            ILibraryManager libraryManager,
+            IServerConfigurationManager config)
         {
             _logger = logger;
             _fileSystem = fileSystem;
@@ -80,14 +84,17 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
             }
 
             // Avoid mis-identifying top folders
-            if (args.Parent.IsRoot) return null;
+            if (args.Parent.IsRoot)
+            {
+                return null;
+            }
 
             var directoryService = args.DirectoryService;
 
             var albumResolver = new MusicAlbumResolver(_logger, _fileSystem, _libraryManager);
 
             // If we contain an album assume we are an artist folder
-            return args.FileSystemChildren.Where(i => i.IsDirectory).Any(i => albumResolver.IsMusicAlbum(i.FullName, directoryService, args.GetLibraryOptions())) ? new MusicArtist() : null;
+            return args.FileSystemChildren.Where(i => i.IsDirectory).Any(i => albumResolver.IsMusicAlbum(i.FullName, directoryService)) ? new MusicArtist() : null;
         }
     }
 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs b/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
index 43302bb3f..fb75593bd 100644
--- a/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.IO;
@@ -80,6 +79,7 @@ namespace Emby.Server.Implementations.Library.Resolvers
                             };
                             break;
                         }
+
                         if (IsBluRayDirectory(child.FullName, filename, args.DirectoryService))
                         {
                             videoInfo = parser.ResolveDirectory(args.Path);
@@ -137,7 +137,7 @@ namespace Emby.Server.Implementations.Library.Resolvers
                     return null;
                 }
 
-                if (LibraryManager.IsVideoFile(args.Path, args.GetLibraryOptions()) || videoInfo.IsStub)
+                if (LibraryManager.IsVideoFile(args.Path) || videoInfo.IsStub)
                 {
                     var path = args.Path;
 
diff --git a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
index 1e2e0704c..0b93ebeb8 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.IO;
diff --git a/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
index 6c7690055..cb67c8aa7 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
@@ -21,6 +21,28 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
     /// </summary>
     public class MovieResolver : BaseVideoResolver<Video>, IMultiItemResolver
     {
+        private string[] _validCollectionTypes = new[]
+        {
+                CollectionType.Movies,
+                CollectionType.HomeVideos,
+                CollectionType.MusicVideos,
+                CollectionType.Movies,
+                CollectionType.Photos
+        };
+
+        private readonly IImageProcessor _imageProcessor;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MovieResolver"/> class.
+        /// </summary>
+        /// <param name="libraryManager">The library manager.</param>
+        /// <param name="imageProcessor">The image processor.</param>
+        public MovieResolver(ILibraryManager libraryManager, IImageProcessor imageProcessor)
+            : base(libraryManager)
+        {
+            _imageProcessor = imageProcessor;
+        }
+
         /// <summary>
         /// Gets the priority.
         /// </summary>
@@ -144,7 +166,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
 
             foreach (var video in resolverResult)
             {
-                var firstVideo = video.Files.First();
+                var firstVideo = video.Files[0];
 
                 var videoItem = new T
                 {
@@ -230,7 +252,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                     // Owned items will be caught by the plain video resolver
                     if (args.Parent == null)
                     {
-                        //return FindMovie<Video>(args.Path, args.Parent, files, args.DirectoryService, collectionType);
+                        // return FindMovie<Video>(args.Path, args.Parent, files, args.DirectoryService, collectionType);
                         return null;
                     }
 
@@ -275,7 +297,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             {
                 item = ResolveVideo<Movie>(args, true);
             }
-
             else if (string.Equals(collectionType, CollectionType.HomeVideos, StringComparison.OrdinalIgnoreCase) ||
                 string.Equals(collectionType, CollectionType.Photos, StringComparison.OrdinalIgnoreCase))
             {
@@ -319,7 +340,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         {
             if (item is Movie || item is MusicVideo)
             {
-                //we need to only look at the name of this actual item (not parents)
+                // We need to only look at the name of this actual item (not parents)
                 var justName = item.IsInMixedFolder ? Path.GetFileName(item.Path) : Path.GetFileName(item.ContainingFolderPath);
 
                 if (!string.IsNullOrEmpty(justName))
@@ -347,9 +368,8 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         }
 
         /// <summary>
-        /// Finds a movie based on a child file system entries
+        /// Finds a movie based on a child file system entries.
         /// </summary>
-        /// <typeparam name="T"></typeparam>
         /// <returns>Movie.</returns>
         private T FindMovie<T>(ItemResolveArgs args, string path, Folder parent, List<FileSystemMetadata> fileSystemEntries, IDirectoryService directoryService, string collectionType, bool parseName)
             where T : Video, new()
@@ -377,6 +397,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                         Set3DFormat(movie);
                         return movie;
                     }
+
                     if (IsBluRayDirectory(child.FullName, filename, directoryService))
                     {
                         var movie = new T
@@ -407,15 +428,15 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             }
 
             // TODO: Allow GetMultiDiscMovie in here
-            const bool supportsMultiVersion = true;
+            const bool SupportsMultiVersion = true;
 
-            var result = ResolveVideos<T>(parent, fileSystemEntries, directoryService, supportsMultiVersion, collectionType, parseName) ??
+            var result = ResolveVideos<T>(parent, fileSystemEntries, directoryService, SupportsMultiVersion, collectionType, parseName) ??
                 new MultiItemResolverResult();
 
             if (result.Items.Count == 1)
             {
                 var videoPath = result.Items[0].Path;
-                var hasPhotos = photos.Any(i => !PhotoResolver.IsOwnedByResolvedMedia(LibraryManager, libraryOptions, videoPath, i.Name));
+                var hasPhotos = photos.Any(i => !PhotoResolver.IsOwnedByResolvedMedia(LibraryManager, videoPath, i.Name));
 
                 if (!hasPhotos)
                 {
@@ -425,8 +446,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                     return movie;
                 }
             }
-
-            if (result.Items.Count == 0 && multiDiscFolders.Count > 0)
+            else if (result.Items.Count == 0 && multiDiscFolders.Count > 0)
             {
                 return GetMultiDiscMovie<T>(multiDiscFolders, directoryService);
             }
@@ -437,7 +457,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         /// <summary>
         /// Gets the multi disc movie.
         /// </summary>
-        /// <typeparam name="T"></typeparam>
         /// <param name="multiDiscFolders">The folders.</param>
         /// <param name="directoryService">The directory service.</param>
         /// <returns>``0.</returns>
@@ -451,7 +470,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 var subFileEntries = directoryService.GetFileSystemEntries(i);
 
                 var subfolders = subFileEntries
-                 .Where(e => e.IsDirectory)
+                    .Where(e => e.IsDirectory)
                     .ToList();
 
                 if (subfolders.Any(s => IsDvdDirectory(s.FullName, s.Name, directoryService)))
@@ -459,6 +478,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                     videoTypes.Add(VideoType.Dvd);
                     return true;
                 }
+
                 if (subfolders.Any(s => IsBluRayDirectory(s.FullName, s.Name, directoryService)))
                 {
                     videoTypes.Add(VideoType.BluRay);
@@ -476,7 +496,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 }
 
                 return false;
-
             }).OrderBy(i => i).ToList();
 
             // If different video types were found, don't allow this
@@ -491,24 +510,24 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             }
 
             var namingOptions = ((LibraryManager)LibraryManager).GetNamingOptions();
-            var resolver = new StackResolver(namingOptions);
 
-            var result = resolver.ResolveDirectories(folderPaths);
+            var result = new StackResolver(namingOptions).ResolveDirectories(folderPaths).ToList();
 
-            if (result.Stacks.Count != 1)
+            if (result.Count != 1)
             {
                 return null;
             }
 
+            int additionalPartsLen = folderPaths.Count - 1;
+            var additionalParts = new string[additionalPartsLen];
+            folderPaths.CopyTo(1, additionalParts, 0, additionalPartsLen);
+
             var returnVideo = new T
             {
                 Path = folderPaths[0],
-
-                AdditionalParts = folderPaths.Skip(1).ToArray(),
-
+                AdditionalParts = additionalParts,
                 VideoType = videoTypes[0],
-
-                Name = result.Stacks[0].Name
+                Name = result[0].Name
             };
 
             SetIsoType(returnVideo);
@@ -516,15 +535,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             return returnVideo;
         }
 
-        private string[] ValidCollectionTypes = new[]
-        {
-                CollectionType.Movies,
-                CollectionType.HomeVideos,
-                CollectionType.MusicVideos,
-                CollectionType.Movies,
-                CollectionType.Photos
-        };
-
         private bool IsInvalid(Folder parent, string collectionType)
         {
             if (parent != null)
@@ -540,20 +550,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 return false;
             }
 
-            return !ValidCollectionTypes.Contains(collectionType, StringComparer.OrdinalIgnoreCase);
-        }
-
-        private IImageProcessor _imageProcessor;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="MovieResolver"/> class.
-        /// </summary>
-        /// <param name="libraryManager">The library manager.</param>
-        /// <param name="imageProcessor">The image processor.</param>
-        public MovieResolver(ILibraryManager libraryManager, IImageProcessor imageProcessor)
-            : base(libraryManager)
-        {
-            _imageProcessor = imageProcessor;
+            return !_validCollectionTypes.Contains(collectionType, StringComparer.OrdinalIgnoreCase);
         }
     }
 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/PhotoAlbumResolver.cs b/Emby.Server.Implementations/Library/Resolvers/PhotoAlbumResolver.cs
index 4536b0aaa..3ac837057 100644
--- a/Emby.Server.Implementations/Library/Resolvers/PhotoAlbumResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/PhotoAlbumResolver.cs
@@ -63,13 +63,12 @@ namespace Emby.Server.Implementations.Library.Resolvers
             {
                 if (!file.IsDirectory && PhotoResolver.IsImageFile(file.FullName, _imageProcessor))
                 {
-                    var libraryOptions = args.GetLibraryOptions();
                     var filename = file.Name;
                     var ownedByMedia = false;
 
                     foreach (var siblingFile in files)
                     {
-                        if (PhotoResolver.IsOwnedByMedia(_libraryManager, libraryOptions, siblingFile.FullName, filename))
+                        if (PhotoResolver.IsOwnedByMedia(_libraryManager, siblingFile.FullName, filename))
                         {
                             ownedByMedia = true;
                             break;
diff --git a/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs b/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs
index e1eb23652..bcfcee9c6 100644
--- a/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
@@ -8,7 +7,6 @@ using System.Linq;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
-using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Entities;
 
 namespace Emby.Server.Implementations.Library.Resolvers
@@ -57,11 +55,10 @@ namespace Emby.Server.Implementations.Library.Resolvers
 
                         // Make sure the image doesn't belong to a video file
                         var files = args.DirectoryService.GetFiles(Path.GetDirectoryName(args.Path));
-                        var libraryOptions = args.GetLibraryOptions();
 
                         foreach (var file in files)
                         {
-                            if (IsOwnedByMedia(_libraryManager, libraryOptions, file.FullName, filename))
+                            if (IsOwnedByMedia(_libraryManager, file.FullName, filename))
                             {
                                 return null;
                             }
@@ -78,17 +75,17 @@ namespace Emby.Server.Implementations.Library.Resolvers
             return null;
         }
 
-        internal static bool IsOwnedByMedia(ILibraryManager libraryManager, LibraryOptions libraryOptions, string file, string imageFilename)
+        internal static bool IsOwnedByMedia(ILibraryManager libraryManager, string file, string imageFilename)
         {
-            if (libraryManager.IsVideoFile(file, libraryOptions))
+            if (libraryManager.IsVideoFile(file))
             {
-                return IsOwnedByResolvedMedia(libraryManager, libraryOptions, file, imageFilename);
+                return IsOwnedByResolvedMedia(libraryManager, file, imageFilename);
             }
 
             return false;
         }
 
-        internal static bool IsOwnedByResolvedMedia(ILibraryManager libraryManager, LibraryOptions libraryOptions, string file, string imageFilename)
+        internal static bool IsOwnedByResolvedMedia(ILibraryManager libraryManager, string file, string imageFilename)
             => imageFilename.StartsWith(Path.GetFileNameWithoutExtension(file), StringComparison.OrdinalIgnoreCase);
 
         internal static bool IsImageFile(string path, IImageProcessor imageProcessor)
diff --git a/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs b/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs
index 5e672f221..41561916f 100644
--- a/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs
@@ -1,65 +1,70 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.IO;
 using System.Linq;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Playlists;
+using MediaBrowser.Controller.Resolvers;
+using MediaBrowser.LocalMetadata.Savers;
 using MediaBrowser.Model.Entities;
 
 namespace Emby.Server.Implementations.Library.Resolvers
 {
+    /// <summary>
+    /// <see cref="IItemResolver"/> for <see cref="Playlist"/> library items.
+    /// </summary>
     public class PlaylistResolver : FolderResolver<Playlist>
     {
-        private string[] SupportedCollectionTypes = new string[] {
-
+        private string[] _musicPlaylistCollectionTypes = new string[] {
             string.Empty,
             CollectionType.Music
         };
 
-        /// <summary>
-        /// Resolves the specified args.
-        /// </summary>
-        /// <param name="args">The args.</param>
-        /// <returns>BoxSet.</returns>
+        /// <inheritdoc/>
         protected override Playlist Resolve(ItemResolveArgs args)
         {
-            // It's a boxset if all of the following conditions are met:
-            // Is a Directory
-            // Contains [playlist] in the path
             if (args.IsDirectory)
             {
-                var filename = Path.GetFileName(args.Path);
-
-                if (string.IsNullOrEmpty(filename))
+                // It's a boxset if the path is a directory with [playlist] in it's the name
+                // TODO: Should this use Path.GetDirectoryName() instead?
+                bool isBoxSet = Path.GetFileName(args.Path)
+                    ?.Contains("[playlist]", StringComparison.OrdinalIgnoreCase)
+                    ?? false;
+                if (isBoxSet)
                 {
-                    return null;
+                    return new Playlist
+                    {
+                        Path = args.Path,
+                        Name = Path.GetFileName(args.Path).Replace("[playlist]", string.Empty, StringComparison.OrdinalIgnoreCase).Trim()
+                    };
                 }
 
-                if (filename.IndexOf("[playlist]", StringComparison.OrdinalIgnoreCase) != -1)
+                // It's a directory-based playlist if the directory contains a playlist file
+                var filePaths = Directory.EnumerateFiles(args.Path);
+                if (filePaths.Any(f => f.EndsWith(PlaylistXmlSaver.DefaultPlaylistFilename, StringComparison.OrdinalIgnoreCase)))
                 {
                     return new Playlist
                     {
                         Path = args.Path,
-                        Name = Path.GetFileName(args.Path).Replace("[playlist]", string.Empty, StringComparison.OrdinalIgnoreCase).Trim()
+                        Name = Path.GetFileName(args.Path)
                     };
                 }
             }
-            else
+
+            // Check if this is a music playlist file
+            // It should have the correct collection type and a supported file extension
+            else if (_musicPlaylistCollectionTypes.Contains(args.CollectionType ?? string.Empty, StringComparer.OrdinalIgnoreCase))
             {
-                if (SupportedCollectionTypes.Contains(args.CollectionType ?? string.Empty, StringComparer.OrdinalIgnoreCase))
+                var extension = Path.GetExtension(args.Path);
+                if (Playlist.SupportedExtensions.Contains(extension ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 {
-                    var extension = Path.GetExtension(args.Path);
-                    if (Playlist.SupportedExtensions.Contains(extension ?? string.Empty, StringComparer.OrdinalIgnoreCase))
+                    return new Playlist
                     {
-                        return new Playlist
-                        {
-                            Path = args.Path,
-                            Name = Path.GetFileNameWithoutExtension(args.Path),
-                            IsInMixedFolder = true
-                        };
-                    }
+                        Path = args.Path,
+                        Name = Path.GetFileNameWithoutExtension(args.Path),
+                        IsInMixedFolder = true
+                    };
                 }
             }
 
diff --git a/Emby.Server.Implementations/Library/Resolvers/SpecialFolderResolver.cs b/Emby.Server.Implementations/Library/Resolvers/SpecialFolderResolver.cs
index eca60b133..1030ed39d 100644
--- a/Emby.Server.Implementations/Library/Resolvers/SpecialFolderResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/SpecialFolderResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.IO;
diff --git a/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs b/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs
index 3b9e48d97..18145b7f1 100644
--- a/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs
@@ -9,17 +9,12 @@ using Microsoft.Extensions.Logging;
 namespace Emby.Server.Implementations.Library.Resolvers.TV
 {
     /// <summary>
-    /// Class SeasonResolver
+    /// Class SeasonResolver.
     /// </summary>
     public class SeasonResolver : FolderResolver<Season>
     {
-        /// <summary>
-        /// The _config
-        /// </summary>
         private readonly IServerConfigurationManager _config;
-
         private readonly ILibraryManager _libraryManager;
-        private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
         private readonly ILocalizationManager _localization;
         private readonly ILogger _logger;
 
@@ -30,7 +25,11 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
         /// <param name="libraryManager">The library manager.</param>
         /// <param name="localization">The localization</param>
         /// <param name="logger">The logger</param>
-        public SeasonResolver(IServerConfigurationManager config, ILibraryManager libraryManager, ILocalizationManager localization, ILogger logger)
+        public SeasonResolver(
+            IServerConfigurationManager config,
+            ILibraryManager libraryManager,
+            ILocalizationManager localization,
+            ILogger<SeasonResolver> logger)
         {
             _config = config;
             _libraryManager = libraryManager;
@@ -45,14 +44,13 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
         /// <returns>Season.</returns>
         protected override Season Resolve(ItemResolveArgs args)
         {
-            if (args.Parent is Series && args.IsDirectory)
+            if (args.Parent is Series series && args.IsDirectory)
             {
                 var namingOptions = ((LibraryManager)_libraryManager).GetNamingOptions();
-                var series = ((Series)args.Parent);
 
                 var path = args.Path;
 
-                var seasonParserResult = new SeasonPathParser().Parse(path, true, true);
+                var seasonParserResult = SeasonPathParser.Parse(path, true, true);
 
                 var season = new Season
                 {
@@ -74,7 +72,8 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                     {
                         if (episodeInfo.EpisodeNumber.HasValue && episodeInfo.SeasonNumber.HasValue)
                         {
-                            _logger.LogDebug("Found folder underneath series with episode number: {0}. Season {1}. Episode {2}",
+                            _logger.LogDebug(
+                                "Found folder underneath series with episode number: {0}. Season {1}. Episode {2}",
                                 path,
                                 episodeInfo.SeasonNumber.Value,
                                 episodeInfo.EpisodeNumber.Value);
@@ -90,7 +89,11 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
 
                     season.Name = seasonNumber == 0 ?
                         args.LibraryOptions.SeasonZeroDisplayName :
-                        string.Format(_localization.GetLocalizedString("NameSeasonNumber"), seasonNumber.ToString(UsCulture), args.GetLibraryOptions().PreferredMetadataLanguage);
+                        string.Format(
+                            CultureInfo.InvariantCulture,
+                            _localization.GetLocalizedString("NameSeasonNumber"),
+                            seasonNumber,
+                            args.GetLibraryOptions().PreferredMetadataLanguage);
 
                 }
 
diff --git a/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs b/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs
index e39d85bc9..dd6bd8ee8 100644
--- a/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
@@ -9,7 +8,6 @@ using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Controller.Resolvers;
-using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
 using Microsoft.Extensions.Logging;
@@ -31,7 +29,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
         /// <param name="fileSystem">The file system.</param>
         /// <param name="logger">The logger.</param>
         /// <param name="libraryManager">The library manager.</param>
-        public SeriesResolver(IFileSystem fileSystem, ILogger logger, ILibraryManager libraryManager)
+        public SeriesResolver(IFileSystem fileSystem, ILogger<SeriesResolver> logger, ILibraryManager libraryManager)
         {
             _fileSystem = fileSystem;
             _logger = logger;
@@ -102,7 +100,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                         return null;
                     }
 
-                    if (IsSeriesFolder(args.Path, args.FileSystemChildren, args.DirectoryService, _fileSystem, _logger, _libraryManager, args.GetLibraryOptions(), false))
+                    if (IsSeriesFolder(args.Path, args.FileSystemChildren, args.DirectoryService, _fileSystem, _logger, _libraryManager, false))
                     {
                         return new Series
                         {
@@ -123,24 +121,10 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
             IFileSystem fileSystem,
             ILogger logger,
             ILibraryManager libraryManager,
-            LibraryOptions libraryOptions,
             bool isTvContentType)
         {
             foreach (var child in fileSystemChildren)
             {
-                //if ((attributes & FileAttributes.Hidden) == FileAttributes.Hidden)
-                //{
-                //    //logger.LogDebug("Igoring series file or folder marked hidden: {0}", child.FullName);
-                //    continue;
-                //}
-
-                // Can't enforce this because files saved by Bitcasa are always marked System
-                //if ((attributes & FileAttributes.System) == FileAttributes.System)
-                //{
-                //    logger.LogDebug("Igoring series subfolder marked system: {0}", child.FullName);
-                //    continue;
-                //}
-
                 if (child.IsDirectory)
                 {
                     if (IsSeasonFolder(child.FullName, isTvContentType, libraryManager))
@@ -152,7 +136,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                 else
                 {
                     string fullName = child.FullName;
-                    if (libraryManager.IsVideoFile(fullName, libraryOptions))
+                    if (libraryManager.IsVideoFile(fullName))
                     {
                         if (isTvContentType)
                         {
@@ -203,7 +187,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
         /// <returns><c>true</c> if [is season folder] [the specified path]; otherwise, <c>false</c>.</returns>
         private static bool IsSeasonFolder(string path, bool isTvContentType, ILibraryManager libraryManager)
         {
-            var seasonNumber = new SeasonPathParser().Parse(path, isTvContentType, isTvContentType).SeasonNumber;
+            var seasonNumber = SeasonPathParser.Parse(path, isTvContentType, isTvContentType).SeasonNumber;
 
             return seasonNumber.HasValue;
         }
diff --git a/Emby.Server.Implementations/Library/Resolvers/VideoResolver.cs b/Emby.Server.Implementations/Library/Resolvers/VideoResolver.cs
index 6404d6476..62268fce9 100644
--- a/Emby.Server.Implementations/Library/Resolvers/VideoResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/VideoResolver.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
diff --git a/Emby.Server.Implementations/Library/SearchEngine.cs b/Emby.Server.Implementations/Library/SearchEngine.cs
index 76ae14720..59a77607d 100644
--- a/Emby.Server.Implementations/Library/SearchEngine.cs
+++ b/Emby.Server.Implementations/Library/SearchEngine.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
@@ -18,16 +17,15 @@ namespace Emby.Server.Implementations.Library
 {
     public class SearchEngine : ISearchEngine
     {
+        private readonly ILogger _logger;
         private readonly ILibraryManager _libraryManager;
         private readonly IUserManager _userManager;
-        private readonly ILogger _logger;
 
-        public SearchEngine(ILoggerFactory loggerFactory, ILibraryManager libraryManager, IUserManager userManager)
+        public SearchEngine(ILogger<SearchEngine> logger, ILibraryManager libraryManager, IUserManager userManager)
         {
+            _logger = logger;
             _libraryManager = libraryManager;
             _userManager = userManager;
-
-            _logger = loggerFactory.CreateLogger("SearchEngine");
         }
 
         public QueryResult<SearchHintInfo> GetSearchHints(SearchQuery query)
diff --git a/Emby.Server.Implementations/Library/UserDataManager.cs b/Emby.Server.Implementations/Library/UserDataManager.cs
index f1fb35d9a..a9772a078 100644
--- a/Emby.Server.Implementations/Library/UserDataManager.cs
+++ b/Emby.Server.Implementations/Library/UserDataManager.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Concurrent;
@@ -29,25 +28,24 @@ namespace Emby.Server.Implementations.Library
 
         private readonly ILogger _logger;
         private readonly IServerConfigurationManager _config;
-
-        private Func<IUserManager> _userManager;
-
-        public UserDataManager(ILoggerFactory loggerFactory, IServerConfigurationManager config, Func<IUserManager> userManager)
+        private readonly IUserManager _userManager;
+        private readonly IUserDataRepository _repository;
+
+        public UserDataManager(
+            ILogger<UserDataManager> logger,
+            IServerConfigurationManager config,
+            IUserManager userManager,
+            IUserDataRepository repository)
         {
+            _logger = logger;
             _config = config;
-            _logger = loggerFactory.CreateLogger(GetType().Name);
             _userManager = userManager;
+            _repository = repository;
         }
 
-        /// <summary>
-        /// Gets or sets the repository.
-        /// </summary>
-        /// <value>The repository.</value>
-        public IUserDataRepository Repository { get; set; }
-
         public void SaveUserData(Guid userId, BaseItem item, UserItemData userData, UserDataSaveReason reason, CancellationToken cancellationToken)
         {
-            var user = _userManager().GetUserById(userId);
+            var user = _userManager.GetUserById(userId);
 
             SaveUserData(user, item, userData, reason, cancellationToken);
         }
@@ -72,7 +70,7 @@ namespace Emby.Server.Implementations.Library
 
             foreach (var key in keys)
             {
-                Repository.SaveUserData(userId, key, userData, cancellationToken);
+                _repository.SaveUserData(userId, key, userData, cancellationToken);
             }
 
             var cacheKey = GetCacheKey(userId, item.Id);
@@ -97,9 +95,9 @@ namespace Emby.Server.Implementations.Library
         /// <returns></returns>
         public void SaveAllUserData(Guid userId, UserItemData[] userData, CancellationToken cancellationToken)
         {
-            var user = _userManager().GetUserById(userId);
+            var user = _userManager.GetUserById(userId);
 
-            Repository.SaveAllUserData(user.InternalId, userData, cancellationToken);
+            _repository.SaveAllUserData(user.InternalId, userData, cancellationToken);
         }
 
         /// <summary>
@@ -109,14 +107,14 @@ namespace Emby.Server.Implementations.Library
         /// <returns></returns>
         public List<UserItemData> GetAllUserData(Guid userId)
         {
-            var user = _userManager().GetUserById(userId);
+            var user = _userManager.GetUserById(userId);
 
-            return Repository.GetAllUserData(user.InternalId);
+            return _repository.GetAllUserData(user.InternalId);
         }
 
         public UserItemData GetUserData(Guid userId, Guid itemId, List<string> keys)
         {
-            var user = _userManager().GetUserById(userId);
+            var user = _userManager.GetUserById(userId);
 
             return GetUserData(user, itemId, keys);
         }
@@ -132,7 +130,7 @@ namespace Emby.Server.Implementations.Library
 
         private UserItemData GetUserDataInternal(long internalUserId, List<string> keys)
         {
-            var userData = Repository.GetUserData(internalUserId, keys);
+            var userData = _repository.GetUserData(internalUserId, keys);
 
             if (userData != null)
             {
diff --git a/Emby.Server.Implementations/Library/UserManager.cs b/Emby.Server.Implementations/Library/UserManager.cs
index 656eeb145..d63bc6bda 100644
--- a/Emby.Server.Implementations/Library/UserManager.cs
+++ b/Emby.Server.Implementations/Library/UserManager.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Concurrent;
@@ -21,6 +20,7 @@ using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Net;
 using MediaBrowser.Controller.Persistence;
 using MediaBrowser.Controller.Plugins;
 using MediaBrowser.Controller.Providers;
@@ -45,22 +45,14 @@ namespace Emby.Server.Implementations.Library
     {
         private readonly object _policySyncLock = new object();
         private readonly object _configSyncLock = new object();
-        /// <summary>
-        /// The logger.
-        /// </summary>
-        private readonly ILogger _logger;
 
-        /// <summary>
-        /// Gets the active user repository.
-        /// </summary>
-        /// <value>The user repository.</value>
+        private readonly ILogger _logger;
         private readonly IUserRepository _userRepository;
         private readonly IXmlSerializer _xmlSerializer;
         private readonly IJsonSerializer _jsonSerializer;
         private readonly INetworkManager _networkManager;
-
-        private readonly Func<IImageProcessor> _imageProcessorFactory;
-        private readonly Func<IDtoService> _dtoServiceFactory;
+        private readonly IImageProcessor _imageProcessor;
+        private readonly Lazy<IDtoService> _dtoServiceFactory;
         private readonly IServerApplicationHost _appHost;
         private readonly IFileSystem _fileSystem;
         private readonly ICryptoProvider _cryptoProvider;
@@ -75,13 +67,15 @@ namespace Emby.Server.Implementations.Library
         private IPasswordResetProvider[] _passwordResetProviders;
         private DefaultPasswordResetProvider _defaultPasswordResetProvider;
 
+        private IDtoService DtoService => _dtoServiceFactory.Value;
+
         public UserManager(
             ILogger<UserManager> logger,
             IUserRepository userRepository,
             IXmlSerializer xmlSerializer,
             INetworkManager networkManager,
-            Func<IImageProcessor> imageProcessorFactory,
-            Func<IDtoService> dtoServiceFactory,
+            IImageProcessor imageProcessor,
+            Lazy<IDtoService> dtoServiceFactory,
             IServerApplicationHost appHost,
             IJsonSerializer jsonSerializer,
             IFileSystem fileSystem,
@@ -91,7 +85,7 @@ namespace Emby.Server.Implementations.Library
             _userRepository = userRepository;
             _xmlSerializer = xmlSerializer;
             _networkManager = networkManager;
-            _imageProcessorFactory = imageProcessorFactory;
+            _imageProcessor = imageProcessor;
             _dtoServiceFactory = dtoServiceFactory;
             _appHost = appHost;
             _jsonSerializer = jsonSerializer;
@@ -265,6 +259,7 @@ namespace Emby.Server.Implementations.Library
         {
             if (string.IsNullOrWhiteSpace(username))
             {
+                _logger.LogInformation("Authentication request without username has been denied (IP: {IP}).", remoteEndPoint);
                 throw new ArgumentNullException(nameof(username));
             }
 
@@ -291,10 +286,11 @@ namespace Emby.Server.Implementations.Library
                     && authenticationProvider != null
                     && !(authenticationProvider is DefaultAuthenticationProvider))
                 {
-                    // We should trust the user that the authprovider says, not what was typed
+                    // Trust the username returned by the authentication provider
                     username = updatedUsername;
 
-                    // Search the database for the user again; the authprovider might have created it
+                    // Search the database for the user again
+                    // the authentication provider might have created it
                     user = Users
                         .FirstOrDefault(i => string.Equals(username, i.Name, StringComparison.OrdinalIgnoreCase));
 
@@ -319,26 +315,26 @@ namespace Emby.Server.Implementations.Library
 
             if (user == null)
             {
+                _logger.LogInformation("Authentication request for {UserName} has been denied (IP: {IP}).", username, remoteEndPoint);
                 throw new AuthenticationException("Invalid username or password entered.");
             }
 
             if (user.Policy.IsDisabled)
             {
-                throw new AuthenticationException(
-                    string.Format(
-                        CultureInfo.InvariantCulture,
-                        "The {0} account is currently disabled. Please consult with your administrator.",
-                        user.Name));
+                _logger.LogInformation("Authentication request for {UserName} has been denied because this account is currently disabled (IP: {IP}).", username, remoteEndPoint);
+                throw new SecurityException($"The {user.Name} account is currently disabled. Please consult with your administrator.");
             }
 
             if (!user.Policy.EnableRemoteAccess && !_networkManager.IsInLocalNetwork(remoteEndPoint))
             {
-                throw new AuthenticationException("Forbidden.");
+                _logger.LogInformation("Authentication request for {UserName} forbidden: remote access disabled and user not in local network (IP: {IP}).", username, remoteEndPoint);
+                throw new SecurityException("Forbidden.");
             }
 
             if (!user.IsParentalScheduleAllowed())
             {
-                throw new AuthenticationException("User is not allowed access at this time.");
+                _logger.LogInformation("Authentication request for {UserName} is not allowed at this time due parental restrictions (IP: {IP}).", username, remoteEndPoint);
+                throw new SecurityException("User is not allowed access at this time.");
             }
 
             // Update LastActivityDate and LastLoginDate, then save
@@ -351,14 +347,14 @@ namespace Emby.Server.Implementations.Library
                 }
 
                 ResetInvalidLoginAttemptCount(user);
+                _logger.LogInformation("Authentication request for {UserName} has succeeded.", user.Name);
             }
             else
             {
                 IncrementInvalidLoginAttemptCount(user);
+                _logger.LogInformation("Authentication request for {UserName} has been denied (IP: {IP}).", user.Name, remoteEndPoint);
             }
 
-            _logger.LogInformation("Authentication request for {0} {1}.", user.Name, success ? "has succeeded" : "has been denied");
-
             return success ? user : null;
         }
 
@@ -600,7 +596,7 @@ namespace Emby.Server.Implementations.Library
 
                 try
                 {
-                    _dtoServiceFactory().AttachPrimaryImageAspectRatio(dto, user);
+                    DtoService.AttachPrimaryImageAspectRatio(dto, user);
                 }
                 catch (Exception ex)
                 {
@@ -625,7 +621,7 @@ namespace Emby.Server.Implementations.Library
         {
             try
             {
-                return _imageProcessorFactory().GetImageCacheTag(item, image);
+                return _imageProcessor.GetImageCacheTag(item, image);
             }
             catch (Exception ex)
             {
@@ -667,7 +663,7 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentException("Invalid username", nameof(newName));
             }
 
-            if (user.Name.Equals(newName, StringComparison.OrdinalIgnoreCase))
+            if (user.Name.Equals(newName, StringComparison.Ordinal))
             {
                 throw new ArgumentException("The new and old names must be different.");
             }
@@ -805,17 +801,17 @@ namespace Emby.Server.Implementations.Library
 
             // Delete user config dir
             lock (_configSyncLock)
-            lock (_policySyncLock)
-            {
-                try
-                {
-                    Directory.Delete(user.ConfigurationDirectoryPath, true);
-                }
-                catch (IOException ex)
+                lock (_policySyncLock)
                 {
-                    _logger.LogError(ex, "Error deleting user config dir: {Path}", user.ConfigurationDirectoryPath);
+                    try
+                    {
+                        Directory.Delete(user.ConfigurationDirectoryPath, true);
+                    }
+                    catch (IOException ex)
+                    {
+                        _logger.LogError(ex, "Error deleting user config dir: {Path}", user.ConfigurationDirectoryPath);
+                    }
                 }
-            }
 
             _users.TryRemove(user.Id, out _);
 
diff --git a/Emby.Server.Implementations/Library/UserViewManager.cs b/Emby.Server.Implementations/Library/UserViewManager.cs
index 935deb71c..322819b05 100644
--- a/Emby.Server.Implementations/Library/UserViewManager.cs
+++ b/Emby.Server.Implementations/Library/UserViewManager.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#pragma warning disable SA1600
 
 using System;
 using System.Collections.Generic;
diff --git a/Emby.Server.Implementations/Library/Validators/ArtistsPostScanTask.cs b/Emby.Server.Implementations/Library/Validators/ArtistsPostScanTask.cs
index 61a07d0d6..2af8ff5cb 100644
--- a/Emby.Server.Implementations/Library/Validators/ArtistsPostScanTask.cs
+++ b/Emby.Server.Implementations/Library/Validators/ArtistsPostScanTask.cs
@@ -25,7 +25,10 @@ namespace Emby.Server.Implementations.Library.Validators
         /// <param name="libraryManager">The library manager.</param>
         /// <param name="logger">The logger.</param>
         /// <param name="itemRepo">The item repository.</param>
-        public ArtistsPostScanTask(ILibraryManager libraryManager, ILogger logger, IItemRepository itemRepo)
+        public ArtistsPostScanTask(
+            ILibraryManager libraryManager,
+            ILogger<ArtistsPostScanTask> logger,
+            IItemRepository itemRepo)
         {
             _libraryManager = libraryManager;
             _logger = logger;
diff --git a/Emby.Server.Implementations/Library/Validators/GenresPostScanTask.cs b/Emby.Server.Implementations/Library/Validators/GenresPostScanTask.cs
index 06d1dd89d..251785dfd 100644
--- a/Emby.Server.Implementations/Library/Validators/GenresPostScanTask.cs
+++ b/Emby.Server.Implementations/Library/Validators/GenresPostScanTask.cs
@@ -25,7 +25,10 @@ namespace Emby.Server.Implementations.Library.Validators
         /// <param name="libraryManager">The library manager.</param>
         /// <param name="logger">The logger.</param>
         /// <param name="itemRepo">The item repository.</param>
-        public GenresPostScanTask(ILibraryManager libraryManager, ILogger logger, IItemRepository itemRepo)
+        public GenresPostScanTask(
+            ILibraryManager libraryManager,
+            ILogger<GenresPostScanTask> logger,
+            IItemRepository itemRepo)
         {
             _libraryManager = libraryManager;
             _logger = logger;
diff --git a/Emby.Server.Implementations/Library/Validators/MusicGenresPostScanTask.cs b/Emby.Server.Implementations/Library/Validators/MusicGenresPostScanTask.cs
index 58549e9d7..9d8690116 100644
--- a/Emby.Server.Implementations/Library/Validators/MusicGenresPostScanTask.cs
+++ b/Emby.Server.Implementations/Library/Validators/MusicGenresPostScanTask.cs
@@ -25,7 +25,10 @@ namespace Emby.Server.Implementations.Library.Validators
         /// <param name="libraryManager">The library manager.</param>
         /// <param name="logger">The logger.</param>
         /// <param name="itemRepo">The item repository.</param>
-        public MusicGenresPostScanTask(ILibraryManager libraryManager, ILogger logger, IItemRepository itemRepo)
+        public MusicGenresPostScanTask(
+            ILibraryManager libraryManager,
+            ILogger<MusicGenresPostScanTask> logger,
+            IItemRepository itemRepo)
         {
             _libraryManager = libraryManager;
             _logger = logger;
diff --git a/Emby.Server.Implementations/Library/Validators/StudiosPostScanTask.cs b/Emby.Server.Implementations/Library/Validators/StudiosPostScanTask.cs
index 00899c336..2f8f906b9 100644
--- a/Emby.Server.Implementations/Library/Validators/StudiosPostScanTask.cs
+++ b/Emby.Server.Implementations/Library/Validators/StudiosPostScanTask.cs
@@ -26,7 +26,10 @@ namespace Emby.Server.Implementations.Library.Validators
         /// <param name="libraryManager">The library manager.</param>
         /// <param name="logger">The logger.</param>
         /// <param name="itemRepo">The item repository.</param>
-        public StudiosPostScanTask(ILibraryManager libraryManager, ILogger logger, IItemRepository itemRepo)
+        public StudiosPostScanTask(
+            ILibraryManager libraryManager,
+            ILogger<StudiosPostScanTask> logger,
+            IItemRepository itemRepo)
         {
             _libraryManager = libraryManager;
             _logger = logger;