Merge branch 'master' into PluginConfigSave

.ci/azure-pipelines-abi.yml

@@ -7,7 +7,7 @@ parameters:
   default: "ubuntu-latest"
 - name: DotNetSdkVersion
   type: string
-  default: 3.1.100
+  default: 5.0.100
 
 jobs:
   - job: CompatibilityCheck
@@ -62,6 +62,7 @@ jobs:
 
       - task: DownloadPipelineArtifact@2
         displayName: 'Download Reference Assembly Build Artifact'
+        enabled: false
         inputs:
           source: "specific"
           artifact: "$(NugetPackageName)"
@@ -73,6 +74,7 @@ jobs:
 
       - task: CopyFiles@2
         displayName: 'Copy Reference Assembly Build Artifact'
+        enabled: false
         inputs:
           sourceFolder: $(System.ArtifactsDirectory)/current-artifacts
           contents: '**/*.dll'
@@ -83,6 +85,7 @@ jobs:
 
       - task: DotNetCoreCLI@2
         displayName: 'Execute ABI Compatibility Check Tool'
+        enabled: false
         inputs:
           command: custom
           custom: compat

.ci/azure-pipelines-api-client.yml

@@ -0,0 +1,58 @@
+parameters:
+  - name: LinuxImage
+    type: string
+    default: "ubuntu-latest"
+  - name: GeneratorVersion
+    type: string
+    default: "5.0.0-beta2"
+
+jobs:
+- job: GenerateApiClients
+  displayName: 'Generate Api Clients'
+  condition: startsWith(variables['Build.SourceBranch'], 'refs/tags/v')
+  dependsOn: Test
+
+  pool:
+    vmImage: "${{ parameters.LinuxImage }}"
+
+  steps:
+    - task: DownloadPipelineArtifact@2
+      displayName: 'Download OpenAPI Spec Artifact'
+      inputs:
+        source: 'current'
+        artifact: "OpenAPI Spec"
+        path: "$(System.ArtifactsDirectory)/openapispec"
+        runVersion: "latest"
+
+    - task: CmdLine@2
+      displayName: 'Download OpenApi Generator'
+      inputs:
+        script: "wget https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/${{ parameters.GeneratorVersion }}/openapi-generator-cli-${{ parameters.GeneratorVersion }}.jar -O openapi-generator-cli.jar"
+
+## Authenticate with npm registry
+    - task: npmAuthenticate@0
+      inputs:
+        workingFile: ./.npmrc
+        customEndpoint: 'jellyfin-bot for NPM'
+
+## Generate npm api client
+    - task: CmdLine@2
+      displayName: 'Build stable typescript axios client'
+      inputs:
+        script: "bash ./apiclient/templates/typescript/axios/generate.sh $(System.ArtifactsDirectory)"
+
+## Run npm install
+    - task: Npm@1
+      displayName: 'Install npm dependencies'
+      inputs:
+        command: install
+        workingDir: ./apiclient/generated/typescript/axios
+
+## Publish npm packages
+    - task: Npm@1
+      displayName: 'Publish stable typescript axios client'
+      inputs:
+        command: publish
+        publishRegistry: useExternalRegistry
+        publishEndpoint: 'jellyfin-bot for NPM'
+        workingDir: ./apiclient/generated/typescript/axios

.ci/azure-pipelines-main.yml

@@ -1,7 +1,7 @@
 parameters:
   LinuxImage: 'ubuntu-latest'
   RestoreBuildProjects: 'Jellyfin.Server/Jellyfin.Server.csproj'
-  DotNetSdkVersion: 3.1.100
+  DotNetSdkVersion: 5.0.100
 
 jobs:
   - job: Build

.ci/azure-pipelines-package.yml

@@ -65,6 +65,38 @@ jobs:
       contents: '**'
       targetFolder: '/srv/repository/incoming/azure/$(Build.BuildNumber)/$(BuildConfiguration)'
 
+- job: OpenAPISpec
+  dependsOn: Test
+  condition: or(startsWith(variables['Build.SourceBranch'], 'refs/heads/master'),startsWith(variables['Build.SourceBranch'], 'refs/tags/v'))
+  displayName: 'Push OpenAPI Spec to repository'
+
+  pool:
+    vmImage: 'ubuntu-latest'
+
+  steps:
+  - task: DownloadPipelineArtifact@2
+    displayName: 'Download OpenAPI Spec'
+    inputs:
+      source: 'current'
+      artifact: "OpenAPI Spec"
+      path: "$(System.ArtifactsDirectory)/openapispec"
+      runVersion: "latest"
+
+  - task: SSH@0
+    displayName: 'Create target directory on repository server'
+    inputs:
+      sshEndpoint: repository
+      runOptions: 'inline'
+      inline: 'mkdir -p /srv/repository/incoming/azure/$(Build.BuildNumber)'
+
+  - task: CopyFilesOverSSH@0
+    displayName: 'Upload artifacts to repository server'
+    inputs:
+      sshEndpoint: repository
+      sourceFolder: '$(System.ArtifactsDirectory)/openapispec'
+      contents: 'openapi.json'
+      targetFolder: '/srv/repository/incoming/azure/$(Build.BuildNumber)'
+
 - job: BuildDocker
   displayName: 'Build Docker'
 
@@ -135,7 +167,7 @@ jobs:
     inputs:
       sshEndpoint: repository
       runOptions: 'commands'
-      commands: sudo nohup -n /srv/repository/collect-server.azure.sh /srv/repository/incoming/azure $(Build.BuildNumber) unstable &
+      commands: nohup sudo /srv/repository/collect-server.azure.sh /srv/repository/incoming/azure $(Build.BuildNumber) unstable &
 
   - task: SSH@0
     displayName: 'Update Stable Repository'
@@ -144,7 +176,7 @@ jobs:
     inputs:
       sshEndpoint: repository
       runOptions: 'commands'
-      commands: sudo nohup -n /srv/repository/collect-server.azure.sh /srv/repository/incoming/azure $(Build.BuildNumber) &
+      commands: nohup sudo /srv/repository/collect-server.azure.sh /srv/repository/incoming/azure $(Build.BuildNumber) &
 
 - job: PublishNuget
   displayName: 'Publish NuGet packages'
@@ -156,6 +188,12 @@ jobs:
     vmImage: 'ubuntu-latest'
 
   steps:
+  - task: UseDotNet@2
+    displayName: 'Use .NET 5.0 sdk'
+    inputs:
+      packageType: 'sdk'
+      version: '5.0.x'
+
   - task: DotNetCoreCLI@2
     displayName: 'Build Stable Nuget packages'
     condition: startsWith(variables['Build.SourceBranch'], 'refs/tags/v')

.ci/azure-pipelines-test.yml

@@ -10,7 +10,7 @@ parameters:
   default: "tests/**/*Tests.csproj"
 - name: DotNetSdkVersion
   type: string
-  default: 3.1.100
+  default: 5.0.100
 
 jobs:
   - job: Test
@@ -56,7 +56,7 @@ jobs:
         inputs:
           command: "test"
           projects: ${{ parameters.TestProjects }}
-          arguments: '--configuration Release --collect:"XPlat Code Coverage" --settings tests/coverletArgs.runsettings --verbosity minimal "-p:GenerateDocumentationFile=False"'
+          arguments: '--configuration Release --collect:"XPlat Code Coverage" --settings tests/coverletArgs.runsettings --verbosity minimal'
           publishTestResults: true
           testRunTitle: $(Agent.JobName)
           workingDirectory: "$(Build.SourcesDirectory)"
@@ -94,5 +94,5 @@ jobs:
         displayName: 'Publish OpenAPI Artifact'
         condition: and(succeeded(), eq(variables['Agent.OS'], 'Linux'))
         inputs:
-          targetPath: "tests/Jellyfin.Api.Tests/bin/Release/netcoreapp3.1/openapi.json"
+          targetPath: "tests/Jellyfin.Api.Tests/bin/Release/net5.0/openapi.json"
           artifactName: 'OpenAPI Spec'

.ci/azure-pipelines.yml

@@ -6,7 +6,7 @@ variables:
 - name: RestoreBuildProjects
   value: 'Jellyfin.Server/Jellyfin.Server.csproj'
 - name: DotNetSdkVersion
-  value: 3.1.100
+  value: 5.0.100
 
 pr:
   autoCancel: true
@@ -34,6 +34,12 @@ jobs:
         Linux: 'ubuntu-latest'
         Windows: 'windows-latest'
         macOS: 'macos-latest'
+        
+- ${{ if or(startsWith(variables['Build.SourceBranch'], 'refs/tags/v'), startsWith(variables['Build.SourceBranch'], 'refs/heads/master')) }}:
+  - template: azure-pipelines-test.yml
+    parameters:
+      ImageNames:
+        Linux: 'ubuntu-latest'
 
 - ${{ if not(or(startsWith(variables['Build.SourceBranch'], 'refs/tags/v'), startsWith(variables['Build.SourceBranch'], 'refs/heads/master'))) }}:
   - template: azure-pipelines-abi.yml
@@ -55,3 +61,6 @@ jobs:
 
 - ${{ if or(startsWith(variables['Build.SourceBranch'], 'refs/tags/v'), startsWith(variables['Build.SourceBranch'], 'refs/heads/master')) }}:
   - template: azure-pipelines-package.yml
+
+- ${{ if or(startsWith(variables['Build.SourceBranch'], 'refs/tags/v'), startsWith(variables['Build.SourceBranch'], 'refs/heads/master')) }}:
+  - template: azure-pipelines-api-client.yml

.gitignore

@@ -276,3 +276,4 @@ BenchmarkDotNet.Artifacts
 web/
 web-src.*
 MediaBrowser.WebDashboard/jellyfin-web
+apiclient/generated

.npmrc

@@ -0,0 +1,3 @@
+registry=https://registry.npmjs.org/
+@jellyfin:registry=https://pkgs.dev.azure.com/jellyfin-project/jellyfin/_packaging/unstable/npm/registry/
+always-auth=true

.vscode/launch.json

@@ -6,19 +6,23 @@
             "type": "coreclr",
             "request": "launch",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/Jellyfin.Server/bin/Debug/netcoreapp3.1/jellyfin.dll",
+            "program": "${workspaceFolder}/Jellyfin.Server/bin/Debug/net5.0/jellyfin.dll",
             "args": [],
             "cwd": "${workspaceFolder}/Jellyfin.Server",
             "console": "internalConsole",
             "stopAtEntry": false,
-            "internalConsoleOptions": "openOnSessionStart"
+            "internalConsoleOptions": "openOnSessionStart",
+            "serverReadyAction": {
+                "action": "openExternally",
+                "pattern": "Overriding address\\(es\\) \\'(https?:\\S+)\\'",
+            }
         },
         {
             "name": ".NET Core Launch (nowebclient)",
             "type": "coreclr",
             "request": "launch",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/Jellyfin.Server/bin/Debug/netcoreapp3.1/jellyfin.dll",
+            "program": "${workspaceFolder}/Jellyfin.Server/bin/Debug/net5.0/jellyfin.dll",
             "args": ["--nowebclient"],
             "cwd": "${workspaceFolder}/Jellyfin.Server",
             "console": "internalConsole",

CONTRIBUTORS.md

@@ -103,6 +103,8 @@
  - [sl1288](https://github.com/sl1288)
  - [sorinyo2004](https://github.com/sorinyo2004)
  - [sparky8251](https://github.com/sparky8251)
+ - [spookbits](https://github.com/spookbits)
+ - [ssenart] (https://github.com/ssenart)
  - [stanionascu](https://github.com/stanionascu)
  - [stevehayles](https://github.com/stevehayles)
  - [SuperSandro2000](https://github.com/SuperSandro2000)
@@ -136,6 +138,7 @@
  - [KristupasSavickas](https://github.com/KristupasSavickas)
  - [Pusta](https://github.com/pusta)
  - [nielsvanvelzen](https://github.com/nielsvanvelzen)
+ - [skyfrk](https://github.com/skyfrk)
 
 # Emby Contributors
 

Dockerfile

@@ -1,4 +1,4 @@
-ARG DOTNET_VERSION=3.1
+ARG DOTNET_VERSION=5.0
 
 FROM node:alpine as web-builder
 ARG JELLYFIN_WEB_VERSION=master
@@ -8,7 +8,7 @@ RUN apk add curl git zlib zlib-dev autoconf g++ make libpng-dev gifsicle alpine-
  && yarn install \
  && mv dist /dist
 
-FROM mcr.microsoft.com/dotnet/core/sdk:${DOTNET_VERSION}-buster as builder
+FROM mcr.microsoft.com/dotnet/sdk:${DOTNET_VERSION}-buster-slim as builder
 WORKDIR /repo
 COPY . .
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=1

Dockerfile.arm

@@ -2,7 +2,7 @@
 #####################################
 # Requires binfm_misc registration
 # https://github.com/multiarch/qemu-user-static#binfmt_misc-register
-ARG DOTNET_VERSION=3.1
+ARG DOTNET_VERSION=5.0
 
 
 FROM node:alpine as web-builder
@@ -14,7 +14,7 @@ RUN apk add curl git zlib zlib-dev autoconf g++ make libpng-dev gifsicle alpine-
  && mv dist /dist
 
 
-FROM mcr.microsoft.com/dotnet/core/sdk:${DOTNET_VERSION} as builder
+FROM mcr.microsoft.com/dotnet/sdk:${DOTNET_VERSION} as builder
 WORKDIR /repo
 COPY . .
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=1

Dockerfile.arm64

@@ -2,7 +2,7 @@
 #####################################
 # Requires binfm_misc registration
 # https://github.com/multiarch/qemu-user-static#binfmt_misc-register
-ARG DOTNET_VERSION=3.1
+ARG DOTNET_VERSION=5.0
 
 
 FROM node:alpine as web-builder
@@ -14,7 +14,7 @@ RUN apk add curl git zlib zlib-dev autoconf g++ make libpng-dev gifsicle alpine-
  && mv dist /dist
 
 
-FROM mcr.microsoft.com/dotnet/core/sdk:${DOTNET_VERSION} as builder
+FROM mcr.microsoft.com/dotnet/sdk:${DOTNET_VERSION} as builder
 WORKDIR /repo
 COPY . .
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=1

DvdLib/DvdLib.csproj

@@ -10,7 +10,7 @@
   </ItemGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>

DvdLib/Ifo/Dvd.cs

@@ -31,7 +31,7 @@ namespace DvdLib.Ifo
                         continue;
                     }
 
-                    var nums = ifo.Name.Split(new[] { '_' }, StringSplitOptions.RemoveEmptyEntries);
+                    var nums = ifo.Name.Split('_', StringSplitOptions.RemoveEmptyEntries);
                     if (nums.Length >= 2 && ushort.TryParse(nums[1], out var ifoNumber))
                     {
                         ReadVTS(ifoNumber, ifo.FullName);

Emby.Dlna/Common/Argument.cs

@@ -1,13 +1,23 @@
-#pragma warning disable CS1591
-
 namespace Emby.Dlna.Common
 {
+    /// <summary>
+    /// DLNA Query parameter type, used when quering DLNA devices via SOAP.
+    /// </summary>
     public class Argument
     {
-        public string Name { get; set; }
+        /// <summary>
+        /// Gets or sets name of the DLNA argument.
+        /// </summary>
+        public string Name { get; set; } = string.Empty;
 
-        public string Direction { get; set; }
+        /// <summary>
+        /// Gets or sets the direction of the parameter.
+        /// </summary>
+        public string Direction { get; set; } = string.Empty;
 
-        public string RelatedStateVariable { get; set; }
+        /// <summary>
+        /// Gets or sets the related DLNA state variable for this argument.
+        /// </summary>
+        public string RelatedStateVariable { get; set; } = string.Empty;
     }
 }

Emby.Dlna/Common/DeviceIcon.cs

@@ -1,29 +1,41 @@
-#pragma warning disable CS1591
-
 using System.Globalization;
 
 namespace Emby.Dlna.Common
 {
+    /// <summary>
+    /// Defines the <see cref="DeviceIcon" />.
+    /// </summary>
     public class DeviceIcon
     {
-        public string Url { get; set; }
+        /// <summary>
+        /// Gets or sets the Url.
+        /// </summary>
+        public string Url { get; set; } = string.Empty;
 
-        public string MimeType { get; set; }
+        /// <summary>
+        /// Gets or sets the MimeType.
+        /// </summary>
+        public string MimeType { get; set; } = string.Empty;
 
+        /// <summary>
+        /// Gets or sets the Width.
+        /// </summary>
         public int Width { get; set; }
 
+        /// <summary>
+        /// Gets or sets the Height.
+        /// </summary>
         public int Height { get; set; }
 
-        public string Depth { get; set; }
+        /// <summary>
+        /// Gets or sets the Depth.
+        /// </summary>
+        public string Depth { get; set; } = string.Empty;
 
         /// <inheritdoc />
         public override string ToString()
         {
-            return string.Format(
-                CultureInfo.InvariantCulture,
-                "{0}x{1}",
-                Height,
-                Width);
+            return string.Format(CultureInfo.InvariantCulture, "{0}x{1}", Height, Width);
         }
     }
 }

Emby.Dlna/Common/DeviceService.cs

@@ -1,21 +1,36 @@
-#pragma warning disable CS1591
-
 namespace Emby.Dlna.Common
 {
+    /// <summary>
+    /// Defines the <see cref="DeviceService" />.
+    /// </summary>
     public class DeviceService
     {
-        public string ServiceType { get; set; }
+        /// <summary>
+        /// Gets or sets the Service Type.
+        /// </summary>
+        public string ServiceType { get; set; } = string.Empty;
 
-        public string ServiceId { get; set; }
+        /// <summary>
+        /// Gets or sets the Service Id.
+        /// </summary>
+        public string ServiceId { get; set; } = string.Empty;
 
-        public string ScpdUrl { get; set; }
+        /// <summary>
+        /// Gets or sets the Scpd Url.
+        /// </summary>
+        public string ScpdUrl { get; set; } = string.Empty;
 
-        public string ControlUrl { get; set; }
+        /// <summary>
+        /// Gets or sets the Control Url.
+        /// </summary>
+        public string ControlUrl { get; set; } = string.Empty;
 
-        public string EventSubUrl { get; set; }
+        /// <summary>
+        /// Gets or sets the EventSubUrl.
+        /// </summary>
+        public string EventSubUrl { get; set; } = string.Empty;
 
         /// <inheritdoc />
-        public override string ToString()
-            => ServiceId;
+        public override string ToString() => ServiceId;
     }
 }

Emby.Dlna/Common/ServiceAction.cs

@@ -1,24 +1,31 @@
-#pragma warning disable CS1591
-
 using System.Collections.Generic;
 
 namespace Emby.Dlna.Common
 {
+    /// <summary>
+    /// Defines the <see cref="ServiceAction" />.
+    /// </summary>
     public class ServiceAction
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ServiceAction"/> class.
+        /// </summary>
         public ServiceAction()
         {
             ArgumentList = new List<Argument>();
         }
 
-        public string Name { get; set; }
+        /// <summary>
+        /// Gets or sets the name of the action.
+        /// </summary>
+        public string Name { get; set; } = string.Empty;
 
+        /// <summary>
+        /// Gets the ArgumentList.
+        /// </summary>
         public List<Argument> ArgumentList { get; }
 
         /// <inheritdoc />
-        public override string ToString()
-        {
-            return Name;
-        }
+        public override string ToString() => Name;
     }
 }

Emby.Dlna/Common/StateVariable.cs

@@ -1,27 +1,34 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Collections.Generic;
 
 namespace Emby.Dlna.Common
 {
+    /// <summary>
+    /// Defines the <see cref="StateVariable" />.
+    /// </summary>
     public class StateVariable
     {
-        public StateVariable()
-        {
-            AllowedValues = Array.Empty<string>();
-        }
+        /// <summary>
+        /// Gets or sets the name of the state variable.
+        /// </summary>
+        public string Name { get; set; } = string.Empty;
 
-        public string Name { get; set; }
-
-        public string DataType { get; set; }
+        /// <summary>
+        /// Gets or sets the data type of the state variable.
+        /// </summary>
+        public string DataType { get; set; } = string.Empty;
 
+        /// <summary>
+        /// Gets or sets a value indicating whether it sends events.
+        /// </summary>
         public bool SendsEvents { get; set; }
 
-        public IReadOnlyList<string> AllowedValues { get; set; }
+        /// <summary>
+        /// Gets or sets the allowed values range.
+        /// </summary>
+        public IReadOnlyList<string> AllowedValues { get; set; } = Array.Empty<string>();
 
         /// <inheritdoc />
-        public override string ToString()
-            => Name;
+        public override string ToString() => Name;
     }
 }

Emby.Dlna/ContentDirectory/ContentDirectoryService.cs

@@ -19,6 +19,9 @@ using Microsoft.Extensions.Logging;
 
 namespace Emby.Dlna.ContentDirectory
 {
+    /// <summary>
+    /// Defines the <see cref="ContentDirectoryService" />.
+    /// </summary>
     public class ContentDirectoryService : BaseService, IContentDirectory
     {
         private readonly ILibraryManager _libraryManager;
@@ -33,6 +36,22 @@ namespace Emby.Dlna.ContentDirectory
         private readonly IMediaEncoder _mediaEncoder;
         private readonly ITVSeriesManager _tvSeriesManager;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ContentDirectoryService"/> class.
+        /// </summary>
+        /// <param name="dlna">The <see cref="IDlnaManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="userDataManager">The <see cref="IUserDataManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="imageProcessor">The <see cref="IImageProcessor"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="libraryManager">The <see cref="ILibraryManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="config">The <see cref="IServerConfigurationManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="userManager">The <see cref="IUserManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="logger">The <see cref="ILogger{ContentDirectoryService}"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="httpClient">The <see cref="IHttpClientFactory"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="localization">The <see cref="ILocalizationManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="mediaSourceManager">The <see cref="IMediaSourceManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="userViewManager">The <see cref="IUserViewManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="mediaEncoder">The <see cref="IMediaEncoder"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
+        /// <param name="tvSeriesManager">The <see cref="ITVSeriesManager"/> to use in the <see cref="ContentDirectoryService"/> instance.</param>
         public ContentDirectoryService(
             IDlnaManager dlna,
             IUserDataManager userDataManager,
@@ -62,7 +81,10 @@ namespace Emby.Dlna.ContentDirectory
             _tvSeriesManager = tvSeriesManager;
         }
 
-        private int SystemUpdateId
+        /// <summary>
+        /// Gets the system id. (A unique id which changes on when our definition changes.)
+        /// </summary>
+        private static int SystemUpdateId
         {
             get
             {
@@ -75,14 +97,18 @@ namespace Emby.Dlna.ContentDirectory
         /// <inheritdoc />
         public string GetServiceXml()
         {
-            return new ContentDirectoryXmlBuilder().GetXml();
+            return ContentDirectoryXmlBuilder.GetXml();
         }
 
         /// <inheritdoc />
         public Task<ControlResponse> ProcessControlRequestAsync(ControlRequest request)
         {
-            var profile = _dlna.GetProfile(request.Headers) ??
-                          _dlna.GetDefaultProfile();
+            if (request == null)
+            {
+                throw new ArgumentNullException(nameof(request));
+            }
+
+            var profile = _dlna.GetProfile(request.Headers) ?? _dlna.GetDefaultProfile();
 
             var serverAddress = request.RequestedUrl.Substring(0, request.RequestedUrl.IndexOf("/dlna", StringComparison.OrdinalIgnoreCase));
 
@@ -107,6 +133,11 @@ namespace Emby.Dlna.ContentDirectory
                 .ProcessControlRequestAsync(request);
         }
 
+        /// <summary>
+        /// Get the user stored in the device profile.
+        /// </summary>
+        /// <param name="profile">The <see cref="DeviceProfile"/>.</param>
+        /// <returns>The <see cref="User"/>.</returns>
         private User GetUser(DeviceProfile profile)
         {
             if (!string.IsNullOrEmpty(profile.UserId))

Emby.Dlna/ContentDirectory/ContentDirectoryXmlBuilder.cs

@@ -6,143 +6,154 @@ using Emby.Dlna.Service;
 
 namespace Emby.Dlna.ContentDirectory
 {
-    public class ContentDirectoryXmlBuilder
+    /// <summary>
+    /// Defines the <see cref="ContentDirectoryXmlBuilder" />.
+    /// </summary>
+    public static class ContentDirectoryXmlBuilder
     {
-        public string GetXml()
+        /// <summary>
+        /// Gets the ContentDirectory:1 service template.
+        /// See http://upnp.org/specs/av/UPnP-av-ContentDirectory-v1-Service.pdf.
+        /// </summary>
+        /// <returns>An XML description of this service.</returns>
+        public static string GetXml()
         {
-            return new ServiceXmlBuilder().GetXml(
-                new ServiceActionListBuilder().GetActions(),
-                GetStateVariables());
+            return new ServiceXmlBuilder().GetXml(ServiceActionListBuilder.GetActions(), GetStateVariables());
         }
 
+        /// <summary>
+        /// Get the list of state variables for this invocation.
+        /// </summary>
+        /// <returns>The <see cref="IEnumerable{StateVariable}"/>.</returns>
         private static IEnumerable<StateVariable> GetStateVariables()
         {
-            var list = new List<StateVariable>();
-
-            list.Add(new StateVariable
+            var list = new List<StateVariable>
             {
-                Name = "A_ARG_TYPE_Filter",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_Filter",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_SortCriteria",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_SortCriteria",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_Index",
-                DataType = "ui4",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_Index",
+                    DataType = "ui4",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_Count",
-                DataType = "ui4",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_Count",
+                    DataType = "ui4",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_UpdateID",
-                DataType = "ui4",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_UpdateID",
+                    DataType = "ui4",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "SearchCapabilities",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "SearchCapabilities",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "SortCapabilities",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "SortCapabilities",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "SystemUpdateID",
-                DataType = "ui4",
-                SendsEvents = true
-            });
+                new StateVariable
+                {
+                    Name = "SystemUpdateID",
+                    DataType = "ui4",
+                    SendsEvents = true
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_SearchCriteria",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_SearchCriteria",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_Result",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_Result",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_ObjectID",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_ObjectID",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_BrowseFlag",
-                DataType = "string",
-                SendsEvents = false,
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_BrowseFlag",
+                    DataType = "string",
+                    SendsEvents = false,
 
-                AllowedValues = new[]
+                    AllowedValues = new[]
                 {
                     "BrowseMetadata",
                     "BrowseDirectChildren"
                 }
-            });
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_BrowseLetter",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_BrowseLetter",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_CategoryType",
-                DataType = "ui4",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_CategoryType",
+                    DataType = "ui4",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_RID",
-                DataType = "ui4",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_RID",
+                    DataType = "ui4",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_PosSec",
-                DataType = "ui4",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_PosSec",
+                    DataType = "ui4",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_Featurelist",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_Featurelist",
+                    DataType = "string",
+                    SendsEvents = false
+                }
+            };
 
             return list;
         }

Emby.Dlna/ContentDirectory/ServerItem.cs

@@ -4,8 +4,15 @@ using MediaBrowser.Controller.Entities;
 
 namespace Emby.Dlna.ContentDirectory
 {
+    /// <summary>
+    /// Defines the <see cref="ServerItem" />.
+    /// </summary>
     internal class ServerItem
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ServerItem"/> class.
+        /// </summary>
+        /// <param name="item">The <see cref="BaseItem"/>.</param>
         public ServerItem(BaseItem item)
         {
             Item = item;
@@ -16,8 +23,14 @@ namespace Emby.Dlna.ContentDirectory
             }
         }
 
+        /// <summary>
+        /// Gets or sets the underlying base item.
+        /// </summary>
         public BaseItem Item { get; set; }
 
+        /// <summary>
+        /// Gets or sets the DLNA item type.
+        /// </summary>
         public StubType? StubType { get; set; }
     }
 }

Emby.Dlna/ContentDirectory/ServiceActionListBuilder.cs

@@ -1,13 +1,18 @@
-#pragma warning disable CS1591
-
 using System.Collections.Generic;
 using Emby.Dlna.Common;
 
 namespace Emby.Dlna.ContentDirectory
 {
-    public class ServiceActionListBuilder
+    /// <summary>
+    /// Defines the <see cref="ServiceActionListBuilder" />.
+    /// </summary>
+    public static class ServiceActionListBuilder
     {
-        public IEnumerable<ServiceAction> GetActions()
+        /// <summary>
+        /// Returns a list of services that this instance provides.
+        /// </summary>
+        /// <returns>An <see cref="IEnumerable{ServiceAction}"/>.</returns>
+        public static IEnumerable<ServiceAction> GetActions()
         {
             return new[]
             {
@@ -22,6 +27,10 @@ namespace Emby.Dlna.ContentDirectory
             };
         }
 
+        /// <summary>
+        /// Returns the action details for "GetSystemUpdateID".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetGetSystemUpdateIDAction()
         {
             var action = new ServiceAction
@@ -39,6 +48,10 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "GetSearchCapabilities".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetSearchCapabilitiesAction()
         {
             var action = new ServiceAction
@@ -56,6 +69,10 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "GetSortCapabilities".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetSortCapabilitiesAction()
         {
             var action = new ServiceAction
@@ -73,6 +90,10 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "X_GetFeatureList".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetX_GetFeatureListAction()
         {
             var action = new ServiceAction
@@ -90,6 +111,10 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "Search".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetSearchAction()
         {
             var action = new ServiceAction
@@ -170,7 +195,11 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
-        private ServiceAction GetBrowseAction()
+        /// <summary>
+        /// Returns the action details for "Browse".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
+        private static ServiceAction GetBrowseAction()
         {
             var action = new ServiceAction
             {
@@ -250,7 +279,11 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
-        private ServiceAction GetBrowseByLetterAction()
+        /// <summary>
+        /// Returns the action details for "X_BrowseByLetter".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
+        private static ServiceAction GetBrowseByLetterAction()
         {
             var action = new ServiceAction
             {
@@ -337,7 +370,11 @@ namespace Emby.Dlna.ContentDirectory
             return action;
         }
 
-        private ServiceAction GetXSetBookmarkAction()
+        /// <summary>
+        /// Returns the action details for "X_SetBookmark".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
+        private static ServiceAction GetXSetBookmarkAction()
         {
             var action = new ServiceAction
             {

Emby.Dlna/ContentDirectory/StubType.cs

@@ -3,6 +3,9 @@
 
 namespace Emby.Dlna.ContentDirectory
 {
+    /// <summary>
+    /// Defines the DLNA item types.
+    /// </summary>
     public enum StubType
     {
         Folder = 0,

Emby.Dlna/Didl/DidlBuilder.cs

@@ -123,7 +123,7 @@ namespace Emby.Dlna.Didl
         {
             foreach (var att in profile.XmlRootAttributes)
             {
-                var parts = att.Name.Split(new[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
+                var parts = att.Name.Split(':', StringSplitOptions.RemoveEmptyEntries);
                 if (parts.Length == 2)
                 {
                     writer.WriteAttributeString(parts[0], parts[1], null, att.Value);

Emby.Dlna/Didl/Filter.cs

@@ -18,7 +18,7 @@ namespace Emby.Dlna.Didl
         {
             _all = string.Equals(filter, "*", StringComparison.OrdinalIgnoreCase);
 
-            _fields = (filter ?? string.Empty).Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+            _fields = (filter ?? string.Empty).Split(',', StringSplitOptions.RemoveEmptyEntries);
         }
 
         public bool Contains(string field)

Emby.Dlna/DlnaManager.cs

@@ -383,9 +383,9 @@ namespace Emby.Dlna
                     continue;
                 }
 
-                var filename = Path.GetFileName(name).Substring(namespaceName.Length);
-
-                var path = Path.Combine(systemProfilesPath, filename);
+                var path = Path.Join(
+                    systemProfilesPath,
+                    Path.GetFileName(name.AsSpan()).Slice(namespaceName.Length));
 
                 using (var stream = _assembly.GetManifestResourceStream(name))
                 {

Emby.Dlna/Emby.Dlna.csproj

@@ -17,7 +17,7 @@
   </ItemGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>

Emby.Dlna/Eventing/DlnaEventManager.cs

@@ -83,7 +83,7 @@ namespace Emby.Dlna.Eventing
             if (!string.IsNullOrEmpty(header))
             {
                 // Starts with SECOND-
-                header = header.Split('-').Last();
+                header = header.Split('-')[^1];
 
                 if (int.TryParse(header, NumberStyles.Integer, _usCulture, out var val))
                 {
@@ -168,7 +168,7 @@ namespace Emby.Dlna.Eventing
 
             builder.Append("</e:propertyset>");
 
-            using var options = new HttpRequestMessage(new HttpMethod("NOTIFY"),  subscription.CallbackUrl);
+            using var options = new HttpRequestMessage(new HttpMethod("NOTIFY"), subscription.CallbackUrl);
             options.Content = new StringContent(builder.ToString(), Encoding.UTF8, MediaTypeNames.Text.Xml);
             options.Headers.TryAddWithoutValidation("NT", subscription.NotificationType);
             options.Headers.TryAddWithoutValidation("NTS", "upnp:propchange");

Emby.Dlna/Main/DlnaEntryPoint.cs

@@ -257,9 +257,10 @@ namespace Emby.Dlna.Main
 
         private async Task RegisterServerEndpoints()
         {
-            var addresses = await _appHost.GetLocalIpAddresses(CancellationToken.None).ConfigureAwait(false);
+            var addresses = await _appHost.GetLocalIpAddresses().ConfigureAwait(false);
 
             var udn = CreateUuid(_appHost.SystemId);
+            var descriptorUri = "/dlna/" + udn + "/description.xml";
 
             foreach (var address in addresses)
             {
@@ -279,7 +280,6 @@ namespace Emby.Dlna.Main
 
                 _logger.LogInformation("Registering publisher for {0} on {1}", fullService, address);
 
-                var descriptorUri = "/dlna/" + udn + "/description.xml";
                 var uri = new Uri(_appHost.GetLocalApiUrl(address) + descriptorUri);
 
                 var device = new SsdpRootDevice

Emby.Dlna/MediaReceiverRegistrar/ControlHandler.cs

@@ -1,5 +1,3 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Collections.Generic;
 using System.Xml;
@@ -10,8 +8,16 @@ using Microsoft.Extensions.Logging;
 
 namespace Emby.Dlna.MediaReceiverRegistrar
 {
+    /// <summary>
+    /// Defines the <see cref="ControlHandler" />.
+    /// </summary>
     public class ControlHandler : BaseControlHandler
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ControlHandler"/> class.
+        /// </summary>
+        /// <param name="config">The <see cref="IServerConfigurationManager"/> for use with the <see cref="ControlHandler"/> instance.</param>
+        /// <param name="logger">The <see cref="ILogger"/> for use with the <see cref="ControlHandler"/> instance.</param>
         public ControlHandler(IServerConfigurationManager config, ILogger logger)
             : base(config, logger)
         {
@@ -35,9 +41,17 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             throw new ResourceNotFoundException("Unexpected control request name: " + methodName);
         }
 
+        /// <summary>
+        /// Records that the handle is authorized in the xml stream.
+        /// </summary>
+        /// <param name="xmlWriter">The <see cref="XmlWriter"/>.</param>
         private static void HandleIsAuthorized(XmlWriter xmlWriter)
             => xmlWriter.WriteElementString("Result", "1");
 
+        /// <summary>
+        /// Records that the handle is validated in the xml stream.
+        /// </summary>
+        /// <param name="xmlWriter">The <see cref="XmlWriter"/>.</param>
         private static void HandleIsValidated(XmlWriter xmlWriter)
             => xmlWriter.WriteElementString("Result", "1");
     }

Emby.Dlna/MediaReceiverRegistrar/MediaReceiverRegistrarService.cs

@@ -1,5 +1,3 @@
-#pragma warning disable CS1591
-
 using System.Net.Http;
 using System.Threading.Tasks;
 using Emby.Dlna.Service;
@@ -8,10 +6,19 @@ using Microsoft.Extensions.Logging;
 
 namespace Emby.Dlna.MediaReceiverRegistrar
 {
+    /// <summary>
+    /// Defines the <see cref="MediaReceiverRegistrarService" />.
+    /// </summary>
     public class MediaReceiverRegistrarService : BaseService, IMediaReceiverRegistrar
     {
         private readonly IServerConfigurationManager _config;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MediaReceiverRegistrarService"/> class.
+        /// </summary>
+        /// <param name="logger">The <see cref="ILogger{MediaReceiverRegistrarService}"/> for use with the <see cref="MediaReceiverRegistrarService"/> instance.</param>
+        /// <param name="httpClientFactory">The <see cref="IHttpClientFactory"/> for use with the <see cref="MediaReceiverRegistrarService"/> instance.</param>
+        /// <param name="config">The <see cref="IServerConfigurationManager"/> for use with the <see cref="MediaReceiverRegistrarService"/> instance.</param>
         public MediaReceiverRegistrarService(
             ILogger<MediaReceiverRegistrarService> logger,
             IHttpClientFactory httpClientFactory,
@@ -24,7 +31,7 @@ namespace Emby.Dlna.MediaReceiverRegistrar
         /// <inheritdoc />
         public string GetServiceXml()
         {
-            return new MediaReceiverRegistrarXmlBuilder().GetXml();
+            return MediaReceiverRegistrarXmlBuilder.GetXml();
         }
 
         /// <inheritdoc />

Emby.Dlna/MediaReceiverRegistrar/MediaReceiverRegistrarXmlBuilder.cs

@@ -1,79 +1,89 @@
-#pragma warning disable CS1591
-
 using System.Collections.Generic;
 using Emby.Dlna.Common;
 using Emby.Dlna.Service;
+using MediaBrowser.Model.Dlna;
 
 namespace Emby.Dlna.MediaReceiverRegistrar
 {
-    public class MediaReceiverRegistrarXmlBuilder
+    /// <summary>
+    /// Defines the <see cref="MediaReceiverRegistrarXmlBuilder" />.
+    /// See https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-drmnd/5d37515e-7a63-4709-8258-8fd4e0ed4482.
+    /// </summary>
+    public static class MediaReceiverRegistrarXmlBuilder
     {
-        public string GetXml()
+        /// <summary>
+        /// Retrieves an XML description of the X_MS_MediaReceiverRegistrar.
+        /// </summary>
+        /// <returns>An XML representation of this service.</returns>
+        public static string GetXml()
         {
-            return new ServiceXmlBuilder().GetXml(
-                new ServiceActionListBuilder().GetActions(),
-                GetStateVariables());
+            return new ServiceXmlBuilder().GetXml(ServiceActionListBuilder.GetActions(), GetStateVariables());
         }
 
+        /// <summary>
+        /// The a list of all the state variables for this invocation.
+        /// </summary>
+        /// <returns>The <see cref="IEnumerable{StateVariable}"/>.</returns>
         private static IEnumerable<StateVariable> GetStateVariables()
         {
-            var list = new List<StateVariable>();
-
-            list.Add(new StateVariable
+            var list = new List<StateVariable>
             {
-                Name = "AuthorizationGrantedUpdateID",
-                DataType = "ui4",
-                SendsEvents = true
-            });
+                new StateVariable
+                {
+                    Name = "AuthorizationGrantedUpdateID",
+                    DataType = "ui4",
+                    SendsEvents = true
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_DeviceID",
-                DataType = "string",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_DeviceID",
+                    DataType = "string",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "AuthorizationDeniedUpdateID",
-                DataType = "ui4",
-                SendsEvents = true
-            });
+                new StateVariable
+                {
+                    Name = "AuthorizationDeniedUpdateID",
+                    DataType = "ui4",
+                    SendsEvents = true
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "ValidationSucceededUpdateID",
-                DataType = "ui4",
-                SendsEvents = true
-            });
+                new StateVariable
+                {
+                    Name = "ValidationSucceededUpdateID",
+                    DataType = "ui4",
+                    SendsEvents = true
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_RegistrationRespMsg",
-                DataType = "bin.base64",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_RegistrationRespMsg",
+                    DataType = "bin.base64",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_RegistrationReqMsg",
-                DataType = "bin.base64",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_RegistrationReqMsg",
+                    DataType = "bin.base64",
+                    SendsEvents = false
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "ValidationRevokedUpdateID",
-                DataType = "ui4",
-                SendsEvents = true
-            });
+                new StateVariable
+                {
+                    Name = "ValidationRevokedUpdateID",
+                    DataType = "ui4",
+                    SendsEvents = true
+                },
 
-            list.Add(new StateVariable
-            {
-                Name = "A_ARG_TYPE_Result",
-                DataType = "int",
-                SendsEvents = false
-            });
+                new StateVariable
+                {
+                    Name = "A_ARG_TYPE_Result",
+                    DataType = "int",
+                    SendsEvents = false
+                }
+            };
 
             return list;
         }

Emby.Dlna/MediaReceiverRegistrar/ServiceActionListBuilder.cs

@@ -1,13 +1,19 @@
-#pragma warning disable CS1591
-
 using System.Collections.Generic;
 using Emby.Dlna.Common;
+using MediaBrowser.Model.Dlna;
 
 namespace Emby.Dlna.MediaReceiverRegistrar
 {
-    public class ServiceActionListBuilder
+    /// <summary>
+    /// Defines the <see cref="ServiceActionListBuilder" />.
+    /// </summary>
+    public static class ServiceActionListBuilder
     {
-        public IEnumerable<ServiceAction> GetActions()
+        /// <summary>
+        /// Returns a list of services that this instance provides.
+        /// </summary>
+        /// <returns>An <see cref="IEnumerable{ServiceAction}"/>.</returns>
+        public static IEnumerable<ServiceAction> GetActions()
         {
             return new[]
             {
@@ -21,6 +27,10 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             };
         }
 
+        /// <summary>
+        /// Returns the action details for "IsValidated".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetIsValidated()
         {
             var action = new ServiceAction
@@ -43,6 +53,10 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "IsAuthorized".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetIsAuthorized()
         {
             var action = new ServiceAction
@@ -65,6 +79,10 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "RegisterDevice".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetRegisterDevice()
         {
             var action = new ServiceAction
@@ -87,6 +105,10 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             return action;
         }
 
+        /// <summary>
+        /// Returns the action details for "GetValidationSucceededUpdateID".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
         private static ServiceAction GetGetValidationSucceededUpdateID()
         {
             var action = new ServiceAction
@@ -103,7 +125,11 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             return action;
         }
 
-        private ServiceAction GetGetAuthorizationDeniedUpdateID()
+        /// <summary>
+        /// Returns the action details for "GetGetAuthorizationDeniedUpdateID".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
+        private static ServiceAction GetGetAuthorizationDeniedUpdateID()
         {
             var action = new ServiceAction
             {
@@ -119,7 +145,11 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             return action;
         }
 
-        private ServiceAction GetGetValidationRevokedUpdateID()
+        /// <summary>
+        /// Returns the action details for "GetValidationRevokedUpdateID".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
+        private static ServiceAction GetGetValidationRevokedUpdateID()
         {
             var action = new ServiceAction
             {
@@ -135,7 +165,11 @@ namespace Emby.Dlna.MediaReceiverRegistrar
             return action;
         }
 
-        private ServiceAction GetGetAuthorizationGrantedUpdateID()
+        /// <summary>
+        /// Returns the action details for "GetAuthorizationGrantedUpdateID".
+        /// </summary>
+        /// <returns>The <see cref="ServiceAction"/>.</returns>
+        private static ServiceAction GetGetAuthorizationGrantedUpdateID()
         {
             var action = new ServiceAction
             {

Emby.Dlna/PlayTo/PlayToController.cs

@@ -326,7 +326,7 @@ namespace Emby.Dlna.PlayTo
 
         public Task SendPlayCommand(PlayRequest command, CancellationToken cancellationToken)
         {
-            _logger.LogDebug("{0} - Received PlayRequest: {1}", this._session.DeviceName, command.PlayCommand);
+            _logger.LogDebug("{0} - Received PlayRequest: {1}", _session.DeviceName, command.PlayCommand);
 
             var user = command.ControllingUserId.Equals(Guid.Empty) ? null : _userManager.GetUserById(command.ControllingUserId);
 
@@ -339,7 +339,7 @@ namespace Emby.Dlna.PlayTo
             var startIndex = command.StartIndex ?? 0;
             if (startIndex > 0)
             {
-                items = items.Skip(startIndex).ToList();
+                items = items.GetRange(startIndex, items.Count - startIndex);
             }
 
             var playlist = new List<PlaylistItem>();
@@ -811,7 +811,7 @@ namespace Emby.Dlna.PlayTo
         }
 
         /// <inheritdoc />
-        public Task SendMessage<T>(string name, Guid messageId, T data, CancellationToken cancellationToken)
+        public Task SendMessage<T>(SessionMessageType name, Guid messageId, T data, CancellationToken cancellationToken)
         {
             if (_disposed)
             {
@@ -823,17 +823,17 @@ namespace Emby.Dlna.PlayTo
                 return Task.CompletedTask;
             }
 
-            if (string.Equals(name, "Play", StringComparison.OrdinalIgnoreCase))
+            if (name == SessionMessageType.Play)
             {
                 return SendPlayCommand(data as PlayRequest, cancellationToken);
             }
 
-            if (string.Equals(name, "PlayState", StringComparison.OrdinalIgnoreCase))
+            if (name == SessionMessageType.PlayState)
             {
                 return SendPlaystateCommand(data as PlaystateRequest, cancellationToken);
             }
 
-            if (string.Equals(name, "GeneralCommand", StringComparison.OrdinalIgnoreCase))
+            if (name == SessionMessageType.GeneralCommand)
             {
                 return SendGeneralCommand(data as GeneralCommand, cancellationToken);
             }
@@ -881,7 +881,10 @@ namespace Emby.Dlna.PlayTo
                     return null;
                 }
 
-                mediaSource = await _mediaSourceManager.GetMediaSource(Item, MediaSourceId, LiveStreamId, false, cancellationToken).ConfigureAwait(false);
+                if (_mediaSourceManager != null)
+                {
+                    mediaSource = await _mediaSourceManager.GetMediaSource(Item, MediaSourceId, LiveStreamId, false, cancellationToken).ConfigureAwait(false);
+                }
 
                 return mediaSource;
             }
@@ -942,7 +945,10 @@ namespace Emby.Dlna.PlayTo
                 request.DeviceId = values.GetValueOrDefault("DeviceId");
                 request.MediaSourceId = values.GetValueOrDefault("MediaSourceId");
                 request.LiveStreamId = values.GetValueOrDefault("LiveStreamId");
-                request.IsDirectStream = string.Equals("true", values.GetValueOrDefault("Static"), StringComparison.OrdinalIgnoreCase);
+
+                // Be careful, IsDirectStream==true by default (Static != false or not in query).
+                // See initialization of StreamingRequestDto in AudioController.GetAudioStream() method : Static = @static ?? true.
+                request.IsDirectStream = !string.Equals("false", values.GetValueOrDefault("Static"), StringComparison.OrdinalIgnoreCase);
 
                 request.AudioStreamIndex = GetIntValue(values, "AudioStreamIndex");
                 request.SubtitleStreamIndex = GetIntValue(values, "SubtitleStreamIndex");

Emby.Dlna/PlayTo/PlayToManager.cs

@@ -217,15 +217,15 @@ namespace Emby.Dlna.PlayTo
 
                     SupportedCommands = new[]
                     {
-                        GeneralCommandType.VolumeDown.ToString(),
-                        GeneralCommandType.VolumeUp.ToString(),
-                        GeneralCommandType.Mute.ToString(),
-                        GeneralCommandType.Unmute.ToString(),
-                        GeneralCommandType.ToggleMute.ToString(),
-                        GeneralCommandType.SetVolume.ToString(),
-                        GeneralCommandType.SetAudioStreamIndex.ToString(),
-                        GeneralCommandType.SetSubtitleStreamIndex.ToString(),
-                        GeneralCommandType.PlayMediaSource.ToString()
+                        GeneralCommandType.VolumeDown,
+                        GeneralCommandType.VolumeUp,
+                        GeneralCommandType.Mute,
+                        GeneralCommandType.Unmute,
+                        GeneralCommandType.ToggleMute,
+                        GeneralCommandType.SetVolume,
+                        GeneralCommandType.SetAudioStreamIndex,
+                        GeneralCommandType.SetSubtitleStreamIndex,
+                        GeneralCommandType.PlayMediaSource
                     },
 
                     SupportsMediaControl = true

Emby.Dlna/PlayTo/SsdpHttpClient.cs

@@ -45,7 +45,7 @@ namespace Emby.Dlna.PlayTo
                     header,
                     cancellationToken)
                 .ConfigureAwait(false);
-            await using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
+            await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
             using var reader = new StreamReader(stream, Encoding.UTF8);
             return XDocument.Parse(
                 await reader.ReadToEndAsync().ConfigureAwait(false),
@@ -94,7 +94,7 @@ namespace Emby.Dlna.PlayTo
             options.Headers.UserAgent.ParseAdd(USERAGENT);
             options.Headers.TryAddWithoutValidation("FriendlyName.DLNA.ORG", FriendlyName);
             using var response = await _httpClientFactory.CreateClient(NamedClient.Default).SendAsync(options, HttpCompletionOption.ResponseHeadersRead, cancellationToken).ConfigureAwait(false);
-            await using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
+            await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
             using var reader = new StreamReader(stream, Encoding.UTF8);
             return XDocument.Parse(
                 await reader.ReadToEndAsync().ConfigureAwait(false),

Emby.Dlna/Service/BaseControlHandler.cs

@@ -60,10 +60,8 @@ namespace Emby.Dlna.Service
                     Async = true
                 };
 
-                using (var reader = XmlReader.Create(streamReader, readerSettings))
-                {
-                    requestInfo = await ParseRequestAsync(reader).ConfigureAwait(false);
-                }
+                using var reader = XmlReader.Create(streamReader, readerSettings);
+                requestInfo = await ParseRequestAsync(reader).ConfigureAwait(false);
             }
 
             Logger.LogDebug("Received control request {0}", requestInfo.LocalName);
@@ -124,10 +122,8 @@ namespace Emby.Dlna.Service
                             {
                                 if (!reader.IsEmptyElement)
                                 {
-                                    using (var subReader = reader.ReadSubtree())
-                                    {
-                                        return await ParseBodyTagAsync(subReader).ConfigureAwait(false);
-                                    }
+                                    using var subReader = reader.ReadSubtree();
+                                    return await ParseBodyTagAsync(subReader).ConfigureAwait(false);
                                 }
                                 else
                                 {
@@ -150,12 +146,12 @@ namespace Emby.Dlna.Service
                 }
             }
 
-            return new ControlRequestInfo();
+            throw new EndOfStreamException("Stream ended but no body tag found.");
         }
 
         private async Task<ControlRequestInfo> ParseBodyTagAsync(XmlReader reader)
         {
-            var result = new ControlRequestInfo();
+            string namespaceURI = null, localName = null;
 
             await reader.MoveToContentAsync().ConfigureAwait(false);
             await reader.ReadAsync().ConfigureAwait(false);
@@ -165,16 +161,15 @@ namespace Emby.Dlna.Service
             {
                 if (reader.NodeType == XmlNodeType.Element)
                 {
-                    result.LocalName = reader.LocalName;
-                    result.NamespaceURI = reader.NamespaceURI;
+                    localName = reader.LocalName;
+                    namespaceURI = reader.NamespaceURI;
 
                     if (!reader.IsEmptyElement)
                     {
-                        using (var subReader = reader.ReadSubtree())
-                        {
-                            await ParseFirstBodyChildAsync(subReader, result.Headers).ConfigureAwait(false);
-                            return result;
-                        }
+                        var result = new ControlRequestInfo(localName, namespaceURI);
+                        using var subReader = reader.ReadSubtree();
+                        await ParseFirstBodyChildAsync(subReader, result.Headers).ConfigureAwait(false);
+                        return result;
                     }
                     else
                     {
@@ -187,7 +182,12 @@ namespace Emby.Dlna.Service
                 }
             }
 
-            return result;
+            if (localName != null && namespaceURI != null)
+            {
+                return new ControlRequestInfo(localName, namespaceURI);
+            }
+
+            throw new EndOfStreamException("Stream ended but no control found.");
         }
 
         private async Task ParseFirstBodyChildAsync(XmlReader reader, IDictionary<string, string> headers)
@@ -234,11 +234,18 @@ namespace Emby.Dlna.Service
 
         private class ControlRequestInfo
         {
+            public ControlRequestInfo(string localName, string namespaceUri)
+            {
+                LocalName = localName;
+                NamespaceURI = namespaceUri;
+                Headers = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+            }
+
             public string LocalName { get; set; }
 
             public string NamespaceURI { get; set; }
 
-            public Dictionary<string, string> Headers { get; } = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+            public Dictionary<string, string> Headers { get; }
         }
     }
 }

Emby.Drawing/Emby.Drawing.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>

Emby.Drawing/ImageProcessor.cs

@@ -36,7 +36,7 @@ namespace Emby.Drawing
         private readonly IImageEncoder _imageEncoder;
         private readonly IMediaEncoder _mediaEncoder;
 
-        private bool _disposed = false;
+        private bool _disposed;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="ImageProcessor"/> class.
@@ -466,11 +466,11 @@ namespace Emby.Drawing
         }
 
         /// <inheritdoc />
-        public void CreateImageCollage(ImageCollageOptions options)
+        public void CreateImageCollage(ImageCollageOptions options, string? libraryName)
         {
             _logger.LogInformation("Creating image collage and saving to {Path}", options.OutputPath);
 
-            _imageEncoder.CreateImageCollage(options);
+            _imageEncoder.CreateImageCollage(options, libraryName);
 
             _logger.LogInformation("Completed creation of image collage and saved to {Path}", options.OutputPath);
         }

Emby.Drawing/NullImageEncoder.cs

@@ -38,7 +38,7 @@ namespace Emby.Drawing
         }
 
         /// <inheritdoc />
-        public void CreateImageCollage(ImageCollageOptions options)
+        public void CreateImageCollage(ImageCollageOptions options, string? libraryName)
         {
             throw new NotImplementedException();
         }

Emby.Naming/Audio/AlbumParser.cs

@@ -1,6 +1,3 @@
-#nullable enable
-#pragma warning disable CS1591
-
 using System;
 using System.Globalization;
 using System.IO;
@@ -9,15 +6,27 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.Audio
 {
+    /// <summary>
+    /// Helper class to determine if Album is multipart.
+    /// </summary>
     public class AlbumParser
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AlbumParser"/> class.
+        /// </summary>
+        /// <param name="options">Naming options containing AlbumStackingPrefixes.</param>
         public AlbumParser(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Function that determines if album is multipart.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>True if album is multipart.</returns>
         public bool IsMultiPart(string path)
         {
             var filename = Path.GetFileName(path);

Emby.Naming/Audio/AudioFileParser.cs

@@ -1,6 +1,3 @@
-#nullable enable
-#pragma warning disable CS1591
-
 using System;
 using System.IO;
 using System.Linq;
@@ -8,8 +5,17 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.Audio
 {
+    /// <summary>
+    /// Static helper class to determine if file at path is audio file.
+    /// </summary>
     public static class AudioFileParser
     {
+        /// <summary>
+        /// Static helper method to determine if file at path is audio file.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <param name="options"><see cref="NamingOptions"/> containing AudioFileExtensions.</param>
+        /// <returns>True if file at path is audio file.</returns>
         public static bool IsAudioFile(string path, NamingOptions options)
         {
             var extension = Path.GetExtension(path);

Emby.Naming/AudioBook/AudioBookFileInfo.cs

@@ -7,6 +7,21 @@ namespace Emby.Naming.AudioBook
     /// </summary>
     public class AudioBookFileInfo : IComparable<AudioBookFileInfo>
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AudioBookFileInfo"/> class.
+        /// </summary>
+        /// <param name="path">Path to audiobook file.</param>
+        /// <param name="container">File type.</param>
+        /// <param name="partNumber">Number of part this file represents.</param>
+        /// <param name="chapterNumber">Number of chapter this file represents.</param>
+        public AudioBookFileInfo(string path, string container, int? partNumber = default, int? chapterNumber = default)
+        {
+            Path = path;
+            Container = container;
+            PartNumber = partNumber;
+            ChapterNumber = chapterNumber;
+        }
+
         /// <summary>
         /// Gets or sets the path.
         /// </summary>
@@ -31,14 +46,8 @@ namespace Emby.Naming.AudioBook
         /// <value>The chapter number.</value>
         public int? ChapterNumber { get; set; }
 
-        /// <summary>
-        /// Gets or sets a value indicating whether this instance is a directory.
-        /// </summary>
-        /// <value>The type.</value>
-        public bool IsDirectory { get; set; }
-
         /// <inheritdoc />
-        public int CompareTo(AudioBookFileInfo other)
+        public int CompareTo(AudioBookFileInfo? other)
         {
             if (ReferenceEquals(this, other))
             {

Emby.Naming/AudioBook/AudioBookFilePathParser.cs

@@ -1,6 +1,3 @@
-#nullable enable
-#pragma warning disable CS1591
-
 using System.Globalization;
 using System.IO;
 using System.Text.RegularExpressions;
@@ -8,15 +5,27 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.AudioBook
 {
+    /// <summary>
+    /// Parser class to extract part and/or chapter number from audiobook filename.
+    /// </summary>
     public class AudioBookFilePathParser
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AudioBookFilePathParser"/> class.
+        /// </summary>
+        /// <param name="options">Naming options containing AudioBookPartsExpressions.</param>
         public AudioBookFilePathParser(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Based on regex determines if filename includes part/chapter number.
+        /// </summary>
+        /// <param name="path">Path to audiobook file.</param>
+        /// <returns>Returns <see cref="AudioBookFilePathParser"/> object.</returns>
         public AudioBookFilePathParserResult Parse(string path)
         {
             AudioBookFilePathParserResult result = default;
@@ -52,8 +61,6 @@ namespace Emby.Naming.AudioBook
                 }
             }
 
-            result.Success = result.ChapterNumber.HasValue || result.PartNumber.HasValue;
-
             return result;
         }
     }

Emby.Naming/AudioBook/AudioBookFilePathParserResult.cs

@@ -1,14 +1,18 @@
-#nullable enable
-#pragma warning disable CS1591
-
 namespace Emby.Naming.AudioBook
 {
+    /// <summary>
+    /// Data object for passing result of audiobook part/chapter extraction.
+    /// </summary>
     public struct AudioBookFilePathParserResult
     {
+        /// <summary>
+        /// Gets or sets optional number of path extracted from audiobook filename.
+        /// </summary>
         public int? PartNumber { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional number of chapter extracted from audiobook filename.
+        /// </summary>
         public int? ChapterNumber { get; set; }
-
-        public bool Success { get; set; }
     }
 }

Emby.Naming/AudioBook/AudioBookInfo.cs

@@ -10,11 +10,18 @@ namespace Emby.Naming.AudioBook
         /// <summary>
         /// Initializes a new instance of the <see cref="AudioBookInfo" /> class.
         /// </summary>
-        public AudioBookInfo()
+        /// <param name="name">Name of audiobook.</param>
+        /// <param name="year">Year of audiobook release.</param>
+        /// <param name="files">List of files composing the actual audiobook.</param>
+        /// <param name="extras">List of extra files.</param>
+        /// <param name="alternateVersions">Alternative version of files.</param>
+        public AudioBookInfo(string name, int? year, List<AudioBookFileInfo>? files, List<AudioBookFileInfo>? extras, List<AudioBookFileInfo>? alternateVersions)
         {
-            Files = new List<AudioBookFileInfo>();
-            Extras = new List<AudioBookFileInfo>();
-            AlternateVersions = new List<AudioBookFileInfo>();
+            Name = name;
+            Year = year;
+            Files = files ?? new List<AudioBookFileInfo>();
+            Extras = extras ?? new List<AudioBookFileInfo>();
+            AlternateVersions = alternateVersions ?? new List<AudioBookFileInfo>();
         }
 
         /// <summary>

Emby.Naming/AudioBook/AudioBookListResolver.cs

@@ -1,6 +1,6 @@
-#pragma warning disable CS1591
-
+using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using Emby.Naming.Common;
 using Emby.Naming.Video;
@@ -8,40 +8,145 @@ using MediaBrowser.Model.IO;
 
 namespace Emby.Naming.AudioBook
 {
+    /// <summary>
+    /// Class used to resolve Name, Year, alternative files and extras from stack of files.
+    /// </summary>
     public class AudioBookListResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AudioBookListResolver"/> class.
+        /// </summary>
+        /// <param name="options">Naming options passed along to <see cref="AudioBookResolver"/> and <see cref="AudioBookNameParser"/>.</param>
         public AudioBookListResolver(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Resolves Name, Year and differentiate alternative files and extras from regular audiobook files.
+        /// </summary>
+        /// <param name="files">List of files related to audiobook.</param>
+        /// <returns>Returns IEnumerable of <see cref="AudioBookInfo"/>.</returns>
         public IEnumerable<AudioBookInfo> Resolve(IEnumerable<FileSystemMetadata> files)
         {
             var audioBookResolver = new AudioBookResolver(_options);
 
+            // File with empty fullname will be sorted out here.
             var audiobookFileInfos = files
-                .Select(i => audioBookResolver.Resolve(i.FullName, i.IsDirectory))
-                .Where(i => i != null)
+                .Select(i => audioBookResolver.Resolve(i.FullName))
+                .OfType<AudioBookFileInfo>()
                 .ToList();
 
-            // Filter out all extras, otherwise they could cause stacks to not be resolved
-            // See the unit test TestStackedWithTrailer
-            var metadata = audiobookFileInfos
-                .Select(i => new FileSystemMetadata { FullName = i.Path, IsDirectory = i.IsDirectory });
-
             var stackResult = new StackResolver(_options)
-                .ResolveAudioBooks(metadata);
+                .ResolveAudioBooks(audiobookFileInfos);
 
             foreach (var stack in stackResult)
             {
-                var stackFiles = stack.Files.Select(i => audioBookResolver.Resolve(i, stack.IsDirectoryStack)).ToList();
+                var stackFiles = stack.Files
+                    .Select(i => audioBookResolver.Resolve(i))
+                    .OfType<AudioBookFileInfo>()
+                    .ToList();
+
                 stackFiles.Sort();
-                var info = new AudioBookInfo { Files = stackFiles, Name = stack.Name };
+
+                var nameParserResult = new AudioBookNameParser(_options).Parse(stack.Name);
+
+                FindExtraAndAlternativeFiles(ref stackFiles, out var extras, out var alternativeVersions, nameParserResult);
+
+                var info = new AudioBookInfo(
+                    nameParserResult.Name,
+                    nameParserResult.Year,
+                    stackFiles,
+                    extras,
+                    alternativeVersions);
 
                 yield return info;
             }
         }
+
+        private void FindExtraAndAlternativeFiles(ref List<AudioBookFileInfo> stackFiles, out List<AudioBookFileInfo> extras, out List<AudioBookFileInfo> alternativeVersions, AudioBookNameParserResult nameParserResult)
+        {
+            extras = new List<AudioBookFileInfo>();
+            alternativeVersions = new List<AudioBookFileInfo>();
+
+            var haveChaptersOrPages = stackFiles.Any(x => x.ChapterNumber != null || x.PartNumber != null);
+            var groupedBy = stackFiles.GroupBy(file => new { file.ChapterNumber, file.PartNumber });
+            var nameWithReplacedDots = nameParserResult.Name.Replace(" ", ".");
+
+            foreach (var group in groupedBy)
+            {
+                if (group.Key.ChapterNumber == null && group.Key.PartNumber == null)
+                {
+                    if (group.Count() > 1 || haveChaptersOrPages)
+                    {
+                        var ex = new List<AudioBookFileInfo>();
+                        var alt = new List<AudioBookFileInfo>();
+
+                        foreach (var audioFile in group)
+                        {
+                            var name = Path.GetFileNameWithoutExtension(audioFile.Path);
+                            if (name.Equals("audiobook") ||
+                                name.Contains(nameParserResult.Name, StringComparison.OrdinalIgnoreCase) ||
+                                name.Contains(nameWithReplacedDots, StringComparison.OrdinalIgnoreCase))
+                            {
+                                alt.Add(audioFile);
+                            }
+                            else
+                            {
+                                ex.Add(audioFile);
+                            }
+                        }
+
+                        if (ex.Count > 0)
+                        {
+                            var extra = ex
+                                .OrderBy(x => x.Container)
+                                .ThenBy(x => x.Path)
+                                .ToList();
+
+                            stackFiles = stackFiles.Except(extra).ToList();
+                            extras.AddRange(extra);
+                        }
+
+                        if (alt.Count > 0)
+                        {
+                            var alternatives = alt
+                                .OrderBy(x => x.Container)
+                                .ThenBy(x => x.Path)
+                                .ToList();
+
+                            var main = FindMainAudioBookFile(alternatives, nameParserResult.Name);
+                            alternatives.Remove(main);
+                            stackFiles = stackFiles.Except(alternatives).ToList();
+                            alternativeVersions.AddRange(alternatives);
+                        }
+                    }
+                }
+                else if (group.Count() > 1)
+                {
+                    var alternatives = group
+                        .OrderBy(x => x.Container)
+                        .ThenBy(x => x.Path)
+                        .Skip(1)
+                        .ToList();
+
+                    stackFiles = stackFiles.Except(alternatives).ToList();
+                    alternativeVersions.AddRange(alternatives);
+                }
+            }
+        }
+
+        private AudioBookFileInfo FindMainAudioBookFile(List<AudioBookFileInfo> files, string name)
+        {
+            var main = files.Find(x => Path.GetFileNameWithoutExtension(x.Path).Equals(name, StringComparison.OrdinalIgnoreCase));
+            main ??= files.FirstOrDefault(x => Path.GetFileNameWithoutExtension(x.Path).Equals("audiobook", StringComparison.OrdinalIgnoreCase));
+            main ??= files.OrderBy(x => x.Container)
+                .ThenBy(x => x.Path)
+                .First();
+
+            return main;
+        }
     }
 }

Emby.Naming/AudioBook/AudioBookNameParser.cs

@@ -0,0 +1,67 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+using Emby.Naming.Common;
+
+namespace Emby.Naming.AudioBook
+{
+    /// <summary>
+    /// Helper class to retrieve name and year from audiobook previously retrieved name.
+    /// </summary>
+    public class AudioBookNameParser
+    {
+        private readonly NamingOptions _options;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AudioBookNameParser"/> class.
+        /// </summary>
+        /// <param name="options">Naming options containing AudioBookNamesExpressions.</param>
+        public AudioBookNameParser(NamingOptions options)
+        {
+            _options = options;
+        }
+
+        /// <summary>
+        /// Parse name and year from previously determined name of audiobook.
+        /// </summary>
+        /// <param name="name">Name of the audiobook.</param>
+        /// <returns>Returns <see cref="AudioBookNameParserResult"/> object.</returns>
+        public AudioBookNameParserResult Parse(string name)
+        {
+            AudioBookNameParserResult result = default;
+            foreach (var expression in _options.AudioBookNamesExpressions)
+            {
+                var match = new Regex(expression, RegexOptions.IgnoreCase).Match(name);
+                if (match.Success)
+                {
+                    if (result.Name == null)
+                    {
+                        var value = match.Groups["name"];
+                        if (value.Success)
+                        {
+                            result.Name = value.Value;
+                        }
+                    }
+
+                    if (!result.Year.HasValue)
+                    {
+                        var value = match.Groups["year"];
+                        if (value.Success)
+                        {
+                            if (int.TryParse(value.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
+                            {
+                                result.Year = intValue;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (string.IsNullOrEmpty(result.Name))
+            {
+                result.Name = name;
+            }
+
+            return result;
+        }
+    }
+}

Emby.Naming/AudioBook/AudioBookNameParserResult.cs

@@ -0,0 +1,18 @@
+namespace Emby.Naming.AudioBook
+{
+    /// <summary>
+    /// Data object used to pass result of name and year parsing.
+    /// </summary>
+    public struct AudioBookNameParserResult
+    {
+        /// <summary>
+        /// Gets or sets name of audiobook.
+        /// </summary>
+        public string Name { get; set; }
+
+        /// <summary>
+        /// Gets or sets optional year of release.
+        /// </summary>
+        public int? Year { get; set; }
+    }
+}

Emby.Naming/AudioBook/AudioBookResolver.cs

@@ -1,5 +1,3 @@
-#pragma warning disable CS1591
-
 using System;
 using System.IO;
 using System.Linq;
@@ -7,35 +5,32 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.AudioBook
 {
+    /// <summary>
+    /// Resolve specifics (path, container, partNumber, chapterNumber) about audiobook file.
+    /// </summary>
     public class AudioBookResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AudioBookResolver"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> containing AudioFileExtensions and also used to pass to AudioBookFilePathParser.</param>
         public AudioBookResolver(NamingOptions options)
         {
             _options = options;
         }
 
-        public AudioBookFileInfo ParseFile(string path)
+        /// <summary>
+        /// Resolve specifics (path, container, partNumber, chapterNumber) about audiobook file.
+        /// </summary>
+        /// <param name="path">Path to audiobook file.</param>
+        /// <returns>Returns <see cref="AudioBookResolver"/> object.</returns>
+        public AudioBookFileInfo? Resolve(string path)
         {
-            return Resolve(path, false);
-        }
-
-        public AudioBookFileInfo ParseDirectory(string path)
-        {
-            return Resolve(path, true);
-        }
-
-        public AudioBookFileInfo Resolve(string path, bool isDirectory = false)
-        {
-            if (string.IsNullOrEmpty(path))
-            {
-                throw new ArgumentNullException(nameof(path));
-            }
-
-            // TODO
-            if (isDirectory)
+            if (path.Length == 0 || Path.GetFileNameWithoutExtension(path).Length == 0)
             {
+                // Return null to indicate this path will not be used, instead of stopping whole process with exception
                 return null;
             }
 
@@ -51,14 +46,11 @@ namespace Emby.Naming.AudioBook
 
             var parsingResult = new AudioBookFilePathParser(_options).Parse(path);
 
-            return new AudioBookFileInfo
-            {
-                Path = path,
-                Container = container,
-                ChapterNumber = parsingResult.ChapterNumber,
-                PartNumber = parsingResult.PartNumber,
-                IsDirectory = isDirectory
-            };
+            return new AudioBookFileInfo(
+                path,
+                container,
+                chapterNumber: parsingResult.ChapterNumber,
+                partNumber: parsingResult.PartNumber);
         }
     }
 }

Emby.Naming/Common/EpisodeExpression.cs

@@ -1,28 +1,32 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Text.RegularExpressions;
 
 namespace Emby.Naming.Common
 {
+    /// <summary>
+    /// Regular expressions for parsing TV Episodes.
+    /// </summary>
     public class EpisodeExpression
     {
         private string _expression;
-        private Regex _regex;
+        private Regex? _regex;
 
-        public EpisodeExpression(string expression, bool byDate)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EpisodeExpression"/> class.
+        /// </summary>
+        /// <param name="expression">Regular expressions.</param>
+        /// <param name="byDate">True if date is expected.</param>
+        public EpisodeExpression(string expression, bool byDate = false)
         {
-            Expression = expression;
+            _expression = expression;
             IsByDate = byDate;
             DateTimeFormats = Array.Empty<string>();
             SupportsAbsoluteEpisodeNumbers = true;
         }
 
-        public EpisodeExpression(string expression)
-            : this(expression, false)
-        {
-        }
-
+        /// <summary>
+        /// Gets or sets raw expressions string.
+        /// </summary>
         public string Expression
         {
             get => _expression;
@@ -33,16 +37,34 @@ namespace Emby.Naming.Common
             }
         }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether gets or sets property indicating if date can be find in expression.
+        /// </summary>
         public bool IsByDate { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether gets or sets property indicating if expression is optimistic.
+        /// </summary>
         public bool IsOptimistic { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether gets or sets property indicating if expression is named.
+        /// </summary>
         public bool IsNamed { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether gets or sets property indicating if expression supports episodes with absolute numbers.
+        /// </summary>
         public bool SupportsAbsoluteEpisodeNumbers { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional list of date formats used for date parsing.
+        /// </summary>
         public string[] DateTimeFormats { get; set; }
 
+        /// <summary>
+        /// Gets a <see cref="Regex"/> expressions objects (creates it if null).
+        /// </summary>
         public Regex Regex => _regex ??= new Regex(Expression, RegexOptions.IgnoreCase | RegexOptions.Compiled);
     }
 }

Emby.Naming/Common/MediaType.cs

@@ -1,7 +1,8 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.Common
 {
+    /// <summary>
+    /// Type of audiovisual media.
+    /// </summary>
     public enum MediaType
     {
         /// <summary>

Emby.Naming/Common/NamingOptions.cs

@@ -1,15 +1,21 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Linq;
 using System.Text.RegularExpressions;
 using Emby.Naming.Video;
 using MediaBrowser.Model.Entities;
 
+// ReSharper disable StringLiteralTypo
+
 namespace Emby.Naming.Common
 {
+    /// <summary>
+    /// Big ugly class containing lot of different naming options that should be split and injected instead of passes everywhere.
+    /// </summary>
     public class NamingOptions
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="NamingOptions"/> class.
+        /// </summary>
         public NamingOptions()
         {
             VideoFileExtensions = new[]
@@ -75,63 +81,52 @@ namespace Emby.Naming.Common
 
             StubTypes = new[]
             {
-                new StubTypeRule
-                {
-                    StubType = "dvd",
-                    Token = "dvd"
-                },
-                new StubTypeRule
-                {
-                    StubType = "hddvd",
-                    Token = "hddvd"
-                },
-                new StubTypeRule
-                {
-                    StubType = "bluray",
-                    Token = "bluray"
-                },
-                new StubTypeRule
-                {
-                    StubType = "bluray",
-                    Token = "brrip"
-                },
-                new StubTypeRule
-                {
-                    StubType = "bluray",
-                    Token = "bd25"
-                },
-                new StubTypeRule
-                {
-                    StubType = "bluray",
-                    Token = "bd50"
-                },
-                new StubTypeRule
-                {
-                    StubType = "vhs",
-                    Token = "vhs"
-                },
-                new StubTypeRule
-                {
-                    StubType = "tv",
-                    Token = "HDTV"
-                },
-                new StubTypeRule
-                {
-                    StubType = "tv",
-                    Token = "PDTV"
-                },
-                new StubTypeRule
-                {
-                    StubType = "tv",
-                    Token = "DSR"
-                }
+                new StubTypeRule(
+                    stubType: "dvd",
+                    token: "dvd"),
+
+                new StubTypeRule(
+                    stubType: "hddvd",
+                    token: "hddvd"),
+
+                new StubTypeRule(
+                    stubType: "bluray",
+                    token: "bluray"),
+
+                new StubTypeRule(
+                    stubType: "bluray",
+                    token: "brrip"),
+
+                new StubTypeRule(
+                    stubType: "bluray",
+                    token: "bd25"),
+
+                new StubTypeRule(
+                    stubType: "bluray",
+                    token: "bd50"),
+
+                new StubTypeRule(
+                    stubType: "vhs",
+                    token: "vhs"),
+
+                new StubTypeRule(
+                    stubType: "tv",
+                    token: "HDTV"),
+
+                new StubTypeRule(
+                    stubType: "tv",
+                    token: "PDTV"),
+
+                new StubTypeRule(
+                    stubType: "tv",
+                    token: "DSR")
             };
 
             VideoFileStackingExpressions = new[]
             {
-                "(.*?)([ _.-]*(?:cd|dvd|p(?:ar)?t|dis[ck])[ _.-]*[0-9]+)(.*?)(\\.[^.]+)$",
-                "(.*?)([ _.-]*(?:cd|dvd|p(?:ar)?t|dis[ck])[ _.-]*[a-d])(.*?)(\\.[^.]+)$",
-                "(.*?)([ ._-]*[a-d])(.*?)(\\.[^.]+)$"
+                "(?<title>.*?)(?<volume>[ _.-]*(?:cd|dvd|p(?:ar)?t|dis[ck])[ _.-]*[0-9]+)(?<ignore>.*?)(?<extension>\\.[^.]+)$",
+                "(?<title>.*?)(?<volume>[ _.-]*(?:cd|dvd|p(?:ar)?t|dis[ck])[ _.-]*[a-d])(?<ignore>.*?)(?<extension>\\.[^.]+)$",
+                "(?<title>.*?)(?<volume>[ ._-]*[a-d])(?<ignore>.*?)(?<extension>\\.[^.]+)$"
             };
 
             CleanDateTimes = new[]
@@ -142,7 +137,7 @@ namespace Emby.Naming.Common
 
             CleanStrings = new[]
             {
-                @"[ _\,\.\(\)\[\]\-](3d|sbs|tab|hsbs|htab|mvc|HDR|HDC|UHD|UltraHD|4k|ac3|dts|custom|dc|divx|divx5|dsr|dsrip|dutch|dvd|dvdrip|dvdscr|dvdscreener|screener|dvdivx|cam|fragment|fs|hdtv|hdrip|hdtvrip|internal|limited|multisubs|ntsc|ogg|ogm|pal|pdtv|proper|repack|rerip|retail|cd[1-9]|r3|r5|bd5|bd|se|svcd|swedish|german|read.nfo|nfofix|unrated|ws|telesync|ts|telecine|tc|brrip|bdrip|480p|480i|576p|576i|720p|720i|1080p|1080i|2160p|hrhd|hrhdtv|hddvd|bluray|x264|h264|xvid|xvidvd|xxx|www.www|\[.*\])([ _\,\.\(\)\[\]\-]|$)",
+                @"[ _\,\.\(\)\[\]\-](3d|sbs|tab|hsbs|htab|mvc|HDR|HDC|UHD|UltraHD|4k|ac3|dts|custom|dc|divx|divx5|dsr|dsrip|dutch|dvd|dvdrip|dvdscr|dvdscreener|screener|dvdivx|cam|fragment|fs|hdtv|hdrip|hdtvrip|internal|limited|multisubs|ntsc|ogg|ogm|pal|pdtv|proper|repack|rerip|retail|cd[1-9]|r3|r5|bd5|bd|se|svcd|swedish|german|read.nfo|nfofix|unrated|ws|telesync|ts|telecine|tc|brrip|bdrip|480p|480i|576p|576i|720p|720i|1080p|1080i|2160p|hrhd|hrhdtv|hddvd|bluray|blu-ray|x264|x265|h264|xvid|xvidvd|xxx|www.www|AAC|DTS|\[.*\])([ _\,\.\(\)\[\]\-]|$)",
                 @"(\[.*\])"
             };
 
@@ -255,7 +250,7 @@ namespace Emby.Naming.Common
                 },
                 // <!-- foo.ep01, foo.EP_01 -->
                 new EpisodeExpression(@"[\._ -]()[Ee][Pp]_?([0-9]+)([^\\/]*)$"),
-                new EpisodeExpression("([0-9]{4})[\\.-]([0-9]{2})[\\.-]([0-9]{2})", true)
+                new EpisodeExpression("(?<year>[0-9]{4})[\\.-](?<month>[0-9]{2})[\\.-](?<day>[0-9]{2})", true)
                 {
                     DateTimeFormats = new[]
                     {
@@ -264,7 +259,7 @@ namespace Emby.Naming.Common
                         "yyyy_MM_dd"
                     }
                 },
-                new EpisodeExpression("([0-9]{2})[\\.-]([0-9]{2})[\\.-]([0-9]{4})", true)
+                new EpisodeExpression(@"(?<day>[0-9]{2})[.-](?<month>[0-9]{2})[.-](?<year>[0-9]{4})", true)
                 {
                     DateTimeFormats = new[]
                     {
@@ -286,7 +281,12 @@ namespace Emby.Naming.Common
                 {
                     SupportsAbsoluteEpisodeNumbers = true
                 },
-                new EpisodeExpression(@"[\\\\/\\._ -](?<seriesname>(?![0-9]+[0-9][0-9])([^\\\/])*)[\\\\/\\._ -](?<seasonnumber>[0-9]+)(?<epnumber>[0-9][0-9](?:(?:[a-i]|\\.[1-9])(?![0-9]))?)([\\._ -][^\\\\/]*)$")
+
+                // Case Closed (1996-2007)/Case Closed - 317.mkv
+                // /server/anything_102.mp4
+                // /server/james.corden.2017.04.20.anne.hathaway.720p.hdtv.x264-crooks.mkv
+                // /server/anything_1996.11.14.mp4
+                new EpisodeExpression(@"[\\/._ -](?<seriesname>(?![0-9]+[0-9][0-9])([^\\\/_])*)[\\\/._ -](?<seasonnumber>[0-9]+)(?<epnumber>[0-9][0-9](?:(?:[a-i]|\.[1-9])(?![0-9]))?)([._ -][^\\\/]*)$")
                 {
                     IsOptimistic = true,
                     IsNamed = true,
@@ -381,247 +381,193 @@ namespace Emby.Naming.Common
 
             VideoExtraRules = new[]
             {
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Trailer,
-                    RuleType = ExtraRuleType.Filename,
-                    Token = "trailer",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Trailer,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-trailer",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Trailer,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = ".trailer",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Trailer,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "_trailer",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Trailer,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = " trailer",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Sample,
-                    RuleType = ExtraRuleType.Filename,
-                    Token = "sample",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Sample,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-sample",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Sample,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = ".sample",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Sample,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "_sample",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Sample,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = " sample",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.ThemeSong,
-                    RuleType = ExtraRuleType.Filename,
-                    Token = "theme",
-                    MediaType = MediaType.Audio
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Scene,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-scene",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Clip,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-clip",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Interview,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-interview",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.BehindTheScenes,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-behindthescenes",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.DeletedScene,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-deleted",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Clip,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-featurette",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Clip,
-                    RuleType = ExtraRuleType.Suffix,
-                    Token = "-short",
-                    MediaType = MediaType.Video
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.BehindTheScenes,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "behind the scenes",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.DeletedScene,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "deleted scenes",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Interview,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "interviews",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Scene,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "scenes",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Sample,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "samples",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Clip,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "shorts",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Clip,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "featurettes",
-                    MediaType = MediaType.Video,
-                },
-                new ExtraRule
-                {
-                    ExtraType = ExtraType.Unknown,
-                    RuleType = ExtraRuleType.DirectoryName,
-                    Token = "extras",
-                    MediaType = MediaType.Video,
-                },
+                new ExtraRule(
+                    ExtraType.Trailer,
+                    ExtraRuleType.Filename,
+                    "trailer",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Trailer,
+                    ExtraRuleType.Suffix,
+                    "-trailer",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Trailer,
+                    ExtraRuleType.Suffix,
+                    ".trailer",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Trailer,
+                    ExtraRuleType.Suffix,
+                    "_trailer",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Trailer,
+                    ExtraRuleType.Suffix,
+                    " trailer",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Sample,
+                    ExtraRuleType.Filename,
+                    "sample",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Sample,
+                    ExtraRuleType.Suffix,
+                    "-sample",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Sample,
+                    ExtraRuleType.Suffix,
+                    ".sample",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Sample,
+                    ExtraRuleType.Suffix,
+                    "_sample",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Sample,
+                    ExtraRuleType.Suffix,
+                    " sample",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.ThemeSong,
+                    ExtraRuleType.Filename,
+                    "theme",
+                    MediaType.Audio),
+
+                new ExtraRule(
+                    ExtraType.Scene,
+                    ExtraRuleType.Suffix,
+                    "-scene",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Clip,
+                    ExtraRuleType.Suffix,
+                    "-clip",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Interview,
+                    ExtraRuleType.Suffix,
+                    "-interview",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.BehindTheScenes,
+                    ExtraRuleType.Suffix,
+                    "-behindthescenes",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.DeletedScene,
+                    ExtraRuleType.Suffix,
+                    "-deleted",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Clip,
+                    ExtraRuleType.Suffix,
+                    "-featurette",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Clip,
+                    ExtraRuleType.Suffix,
+                    "-short",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.BehindTheScenes,
+                    ExtraRuleType.DirectoryName,
+                    "behind the scenes",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.DeletedScene,
+                    ExtraRuleType.DirectoryName,
+                    "deleted scenes",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Interview,
+                    ExtraRuleType.DirectoryName,
+                    "interviews",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Scene,
+                    ExtraRuleType.DirectoryName,
+                    "scenes",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Sample,
+                    ExtraRuleType.DirectoryName,
+                    "samples",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Clip,
+                    ExtraRuleType.DirectoryName,
+                    "shorts",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Clip,
+                    ExtraRuleType.DirectoryName,
+                    "featurettes",
+                    MediaType.Video),
+
+                new ExtraRule(
+                    ExtraType.Unknown,
+                    ExtraRuleType.DirectoryName,
+                    "extras",
+                    MediaType.Video),
             };
 
             Format3DRules = new[]
             {
                 // Kodi rules:
-                new Format3DRule
-                {
-                    PreceedingToken = "3d",
-                    Token = "hsbs"
-                },
-                new Format3DRule
-                {
-                    PreceedingToken = "3d",
-                    Token = "sbs"
-                },
-                new Format3DRule
-                {
-                    PreceedingToken = "3d",
-                    Token = "htab"
-                },
-                new Format3DRule
-                {
-                    PreceedingToken = "3d",
-                    Token = "tab"
-                },
-                                 // Media Browser rules:
-                new Format3DRule
-                {
-                    Token = "fsbs"
-                },
-                new Format3DRule
-                {
-                    Token = "hsbs"
-                },
-                new Format3DRule
-                {
-                    Token = "sbs"
-                },
-                new Format3DRule
-                {
-                    Token = "ftab"
-                },
-                new Format3DRule
-                {
-                    Token = "htab"
-                },
-                new Format3DRule
-                {
-                    Token = "tab"
-                },
-                new Format3DRule
-                {
-                    Token = "sbs3d"
-                },
-                new Format3DRule
-                {
-                    Token = "mvc"
-                }
+                new Format3DRule(
+                    precedingToken: "3d",
+                    token: "hsbs"),
+
+                new Format3DRule(
+                    precedingToken: "3d",
+                    token: "sbs"),
+
+                new Format3DRule(
+                    precedingToken: "3d",
+                    token: "htab"),
+
+                new Format3DRule(
+                    precedingToken: "3d",
+                    token: "tab"),
+
+                 // Media Browser rules:
+                new Format3DRule("fsbs"),
+                new Format3DRule("hsbs"),
+                new Format3DRule("sbs"),
+                new Format3DRule("ftab"),
+                new Format3DRule("htab"),
+                new Format3DRule("tab"),
+                new Format3DRule("sbs3d"),
+                new Format3DRule("mvc")
             };
+
             AudioBookPartsExpressions = new[]
             {
                 // Detect specified chapters, like CH 01
@@ -631,13 +577,20 @@ namespace Emby.Naming.Common
                 // Chapter is often beginning of filename
                 "^(?<chapter>[0-9]+)",
                 // Part if often ending of filename
-                "(?<part>[0-9]+)$",
+                @"(?<!ch(?:apter) )(?<part>[0-9]+)$",
                 // Sometimes named as 0001_005 (chapter_part)
                 "(?<chapter>[0-9]+)_(?<part>[0-9]+)",
                 // Some audiobooks are ripped from cd's, and will be named by disk number.
                 @"dis(?:c|k)[\s_-]?(?<chapter>[0-9]+)"
             };
 
+            AudioBookNamesExpressions = new[]
+            {
+                // Detect year usually in brackets after name Batman (2020)
+                @"^(?<name>.+?)\s*\(\s*(?<year>\d{4})\s*\)\s*$",
+                @"^\s*(?<name>[^ ].*?)\s*$"
+            };
+
             var extensions = VideoFileExtensions.ToList();
 
             extensions.AddRange(new[]
@@ -673,7 +626,7 @@ namespace Emby.Naming.Common
                 ".mxf"
             });
 
-            MultipleEpisodeExpressions = new string[]
+            MultipleEpisodeExpressions = new[]
             {
                 @".*(\\|\/)[sS]?(?<seasonnumber>[0-9]{1,4})[xX](?<epnumber>[0-9]{1,3})((-| - )[0-9]{1,4}[eExX](?<endingepnumber>[0-9]{1,3}))+[^\\\/]*$",
                 @".*(\\|\/)[sS]?(?<seasonnumber>[0-9]{1,4})[xX](?<epnumber>[0-9]{1,3})((-| - )[0-9]{1,4}[xX][eE](?<endingepnumber>[0-9]{1,3}))+[^\\\/]*$",
@@ -697,56 +650,139 @@ namespace Emby.Naming.Common
             Compile();
         }
 
+        /// <summary>
+        /// Gets or sets list of audio file extensions.
+        /// </summary>
         public string[] AudioFileExtensions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of album stacking prefixes.
+        /// </summary>
         public string[] AlbumStackingPrefixes { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of subtitle file extensions.
+        /// </summary>
         public string[] SubtitleFileExtensions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of subtitles flag delimiters.
+        /// </summary>
         public char[] SubtitleFlagDelimiters { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of subtitle forced flags.
+        /// </summary>
         public string[] SubtitleForcedFlags { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of subtitle default flags.
+        /// </summary>
         public string[] SubtitleDefaultFlags { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of episode regular expressions.
+        /// </summary>
         public EpisodeExpression[] EpisodeExpressions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw episode without season regular expressions strings.
+        /// </summary>
         public string[] EpisodeWithoutSeasonExpressions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw multi-part episodes regular expressions strings.
+        /// </summary>
         public string[] EpisodeMultiPartExpressions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of video file extensions.
+        /// </summary>
         public string[] VideoFileExtensions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of video stub file extensions.
+        /// </summary>
         public string[] StubFileExtensions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw audiobook parts regular expressions strings.
+        /// </summary>
         public string[] AudioBookPartsExpressions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw audiobook names regular expressions strings.
+        /// </summary>
+        public string[] AudioBookNamesExpressions { get; set; }
+
+        /// <summary>
+        /// Gets or sets list of stub type rules.
+        /// </summary>
         public StubTypeRule[] StubTypes { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of video flag delimiters.
+        /// </summary>
         public char[] VideoFlagDelimiters { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of 3D Format rules.
+        /// </summary>
         public Format3DRule[] Format3DRules { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw video file-stacking expressions strings.
+        /// </summary>
         public string[] VideoFileStackingExpressions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw clean DateTimes regular expressions strings.
+        /// </summary>
         public string[] CleanDateTimes { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of raw clean strings regular expressions strings.
+        /// </summary>
         public string[] CleanStrings { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of multi-episode regular expressions.
+        /// </summary>
         public EpisodeExpression[] MultipleEpisodeExpressions { get; set; }
 
+        /// <summary>
+        /// Gets or sets list of extra rules for videos.
+        /// </summary>
         public ExtraRule[] VideoExtraRules { get; set; }
 
-        public Regex[] VideoFileStackingRegexes { get; private set; }
+        /// <summary>
+        /// Gets list of video file-stack regular expressions.
+        /// </summary>
+        public Regex[] VideoFileStackingRegexes { get; private set; } = Array.Empty<Regex>();
 
-        public Regex[] CleanDateTimeRegexes { get; private set; }
+        /// <summary>
+        /// Gets list of clean datetime regular expressions.
+        /// </summary>
+        public Regex[] CleanDateTimeRegexes { get; private set; } = Array.Empty<Regex>();
 
-        public Regex[] CleanStringRegexes { get; private set; }
+        /// <summary>
+        /// Gets list of clean string regular expressions.
+        /// </summary>
+        public Regex[] CleanStringRegexes { get; private set; } = Array.Empty<Regex>();
 
-        public Regex[] EpisodeWithoutSeasonRegexes { get; private set; }
+        /// <summary>
+        /// Gets list of episode without season regular expressions.
+        /// </summary>
+        public Regex[] EpisodeWithoutSeasonRegexes { get; private set; } = Array.Empty<Regex>();
 
-        public Regex[] EpisodeMultiPartRegexes { get; private set; }
+        /// <summary>
+        /// Gets list of multi-part episode regular expressions.
+        /// </summary>
+        public Regex[] EpisodeMultiPartRegexes { get; private set; } = Array.Empty<Regex>();
 
+        /// <summary>
+        /// Compiles raw regex strings into regexes.
+        /// </summary>
         public void Compile()
         {
             VideoFileStackingRegexes = VideoFileStackingExpressions.Select(Compile).ToArray();

Emby.Naming/Emby.Naming.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
@@ -14,6 +14,7 @@
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(Stability)'=='Unstable'">
@@ -38,7 +39,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All"/>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
   </ItemGroup>
 
   <!-- Code Analyzers-->

Emby.Naming/Subtitles/SubtitleInfo.cs

@@ -1,9 +1,23 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.Subtitles
 {
+    /// <summary>
+    /// Class holding information about subtitle.
+    /// </summary>
     public class SubtitleInfo
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SubtitleInfo"/> class.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <param name="isDefault">Is subtitle default.</param>
+        /// <param name="isForced">Is subtitle forced.</param>
+        public SubtitleInfo(string path, bool isDefault, bool isForced)
+        {
+            Path = path;
+            IsDefault = isDefault;
+            IsForced = isForced;
+        }
+
         /// <summary>
         /// Gets or sets the path.
         /// </summary>
@@ -14,7 +28,7 @@ namespace Emby.Naming.Subtitles
         /// Gets or sets the language.
         /// </summary>
         /// <value>The language.</value>
-        public string Language { get; set; }
+        public string? Language { get; set; }
 
         /// <summary>
         /// Gets or sets a value indicating whether this instance is default.

Emby.Naming/Subtitles/SubtitleParser.cs

@@ -1,6 +1,3 @@
-#nullable enable
-#pragma warning disable CS1591
-
 using System;
 using System.IO;
 using System.Linq;
@@ -8,20 +5,32 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.Subtitles
 {
+    /// <summary>
+    /// Subtitle Parser class.
+    /// </summary>
     public class SubtitleParser
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SubtitleParser"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing SubtitleFileExtensions, SubtitleDefaultFlags, SubtitleForcedFlags and SubtitleFlagDelimiters.</param>
         public SubtitleParser(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Parse file to determine if is subtitle and <see cref="SubtitleInfo"/>.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>Returns null or <see cref="SubtitleInfo"/> object if parsing is successful.</returns>
         public SubtitleInfo? ParseFile(string path)
         {
             if (path.Length == 0)
             {
-                throw new ArgumentException("File path can't be empty.", nameof(path));
+                return null;
             }
 
             var extension = Path.GetExtension(path);
@@ -31,12 +40,10 @@ namespace Emby.Naming.Subtitles
             }
 
             var flags = GetFlags(path);
-            var info = new SubtitleInfo
-            {
-                Path = path,
-                IsDefault = _options.SubtitleDefaultFlags.Any(i => flags.Contains(i, StringComparer.OrdinalIgnoreCase)),
-                IsForced = _options.SubtitleForcedFlags.Any(i => flags.Contains(i, StringComparer.OrdinalIgnoreCase))
-            };
+            var info = new SubtitleInfo(
+                path,
+                _options.SubtitleDefaultFlags.Any(i => flags.Contains(i, StringComparer.OrdinalIgnoreCase)),
+                _options.SubtitleForcedFlags.Any(i => flags.Contains(i, StringComparer.OrdinalIgnoreCase)));
 
             var parts = flags.Where(i => !_options.SubtitleDefaultFlags.Contains(i, StringComparer.OrdinalIgnoreCase)
                 && !_options.SubtitleForcedFlags.Contains(i, StringComparer.OrdinalIgnoreCase))

Emby.Naming/TV/EpisodeInfo.cs

@@ -1,9 +1,19 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.TV
 {
+    /// <summary>
+    /// Holder object for Episode information.
+    /// </summary>
     public class EpisodeInfo
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EpisodeInfo"/> class.
+        /// </summary>
+        /// <param name="path">Path to the file.</param>
+        public EpisodeInfo(string path)
+        {
+            Path = path;
+        }
+
         /// <summary>
         /// Gets or sets the path.
         /// </summary>
@@ -14,19 +24,19 @@ namespace Emby.Naming.TV
         /// Gets or sets the container.
         /// </summary>
         /// <value>The container.</value>
-        public string Container { get; set; }
+        public string? Container { get; set; }
 
         /// <summary>
         /// Gets or sets the name of the series.
         /// </summary>
         /// <value>The name of the series.</value>
-        public string SeriesName { get; set; }
+        public string? SeriesName { get; set; }
 
         /// <summary>
         /// Gets or sets the format3 d.
         /// </summary>
         /// <value>The format3 d.</value>
-        public string Format3D { get; set; }
+        public string? Format3D { get; set; }
 
         /// <summary>
         /// Gets or sets a value indicating whether [is3 d].
@@ -44,20 +54,41 @@ namespace Emby.Naming.TV
         /// Gets or sets the type of the stub.
         /// </summary>
         /// <value>The type of the stub.</value>
-        public string StubType { get; set; }
+        public string? StubType { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional season number.
+        /// </summary>
         public int? SeasonNumber { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional episode number.
+        /// </summary>
         public int? EpisodeNumber { get; set; }
 
-        public int? EndingEpsiodeNumber { get; set; }
+        /// <summary>
+        /// Gets or sets optional ending episode number. For multi-episode files 1-13.
+        /// </summary>
+        public int? EndingEpisodeNumber { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional year of release.
+        /// </summary>
         public int? Year { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional year of release.
+        /// </summary>
         public int? Month { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional day of release.
+        /// </summary>
         public int? Day { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether by date expression was used.
+        /// </summary>
         public bool IsByDate { get; set; }
     }
 }

Emby.Naming/TV/EpisodePathParser.cs

@@ -1,6 +1,3 @@
-#pragma warning disable CS1591
-#nullable enable
-
 using System;
 using System.Collections.Generic;
 using System.Globalization;
@@ -9,15 +6,32 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.TV
 {
+    /// <summary>
+    /// Used to parse information about episode from path.
+    /// </summary>
     public class EpisodePathParser
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EpisodePathParser"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing EpisodeExpressions and MultipleEpisodeExpressions.</param>
         public EpisodePathParser(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Parses information about episode from path.
+        /// </summary>
+        /// <param name="path">Path.</param>
+        /// <param name="isDirectory">Is path for a directory or file.</param>
+        /// <param name="isNamed">Do we want to use IsNamed expressions.</param>
+        /// <param name="isOptimistic">Do we want to use Optimistic expressions.</param>
+        /// <param name="supportsAbsoluteNumbers">Do we want to use expressions supporting absolute episode numbers.</param>
+        /// <param name="fillExtendedInfo">Should we attempt to retrieve extended information.</param>
+        /// <returns>Returns <see cref="EpisodePathParserResult"/> object.</returns>
         public EpisodePathParserResult Parse(
             string path,
             bool isDirectory,
@@ -146,7 +160,7 @@ namespace Emby.Naming.TV
                         {
                             if (int.TryParse(endingNumberGroup.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out num))
                             {
-                                result.EndingEpsiodeNumber = num;
+                                result.EndingEpisodeNumber = num;
                             }
                         }
                     }
@@ -186,7 +200,7 @@ namespace Emby.Naming.TV
 
         private void FillAdditional(string path, EpisodePathParserResult info)
         {
-            var expressions = _options.MultipleEpisodeExpressions.ToList();
+            var expressions = _options.MultipleEpisodeExpressions.Where(i => i.IsNamed).ToList();
 
             if (string.IsNullOrEmpty(info.SeriesName))
             {
@@ -200,11 +214,6 @@ namespace Emby.Naming.TV
         {
             foreach (var i in expressions)
             {
-                if (!i.IsNamed)
-                {
-                    continue;
-                }
-
                 var result = Parse(path, i);
 
                 if (!result.Success)
@@ -217,13 +226,13 @@ namespace Emby.Naming.TV
                     info.SeriesName = result.SeriesName;
                 }
 
-                if (!info.EndingEpsiodeNumber.HasValue && info.EpisodeNumber.HasValue)
+                if (!info.EndingEpisodeNumber.HasValue && info.EpisodeNumber.HasValue)
                 {
-                    info.EndingEpsiodeNumber = result.EndingEpsiodeNumber;
+                    info.EndingEpisodeNumber = result.EndingEpisodeNumber;
                 }
 
                 if (!string.IsNullOrEmpty(info.SeriesName)
-                    && (!info.EpisodeNumber.HasValue || info.EndingEpsiodeNumber.HasValue))
+                    && (!info.EpisodeNumber.HasValue || info.EndingEpisodeNumber.HasValue))
                 {
                     break;
                 }

Emby.Naming/TV/EpisodePathParserResult.cs

@@ -1,25 +1,54 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.TV
 {
+    /// <summary>
+    /// Holder object for <see cref="EpisodePathParser"/> result.
+    /// </summary>
     public class EpisodePathParserResult
     {
+        /// <summary>
+        /// Gets or sets optional season number.
+        /// </summary>
         public int? SeasonNumber { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional episode number.
+        /// </summary>
         public int? EpisodeNumber { get; set; }
 
-        public int? EndingEpsiodeNumber { get; set; }
+        /// <summary>
+        /// Gets or sets optional ending episode number. For multi-episode files 1-13.
+        /// </summary>
+        public int? EndingEpisodeNumber { get; set; }
 
-        public string SeriesName { get; set; }
+        /// <summary>
+        /// Gets or sets the name of the series.
+        /// </summary>
+        /// <value>The name of the series.</value>
+        public string? SeriesName { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether parsing was successful.
+        /// </summary>
         public bool Success { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether by date expression was used.
+        /// </summary>
         public bool IsByDate { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional year of release.
+        /// </summary>
         public int? Year { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional year of release.
+        /// </summary>
         public int? Month { get; set; }
 
+        /// <summary>
+        /// Gets or sets optional day of release.
+        /// </summary>
         public int? Day { get; set; }
     }
 }

Emby.Naming/TV/EpisodeResolver.cs

@@ -1,6 +1,3 @@
-#pragma warning disable CS1591
-#nullable enable
-
 using System;
 using System.IO;
 using System.Linq;
@@ -9,15 +6,32 @@ using Emby.Naming.Video;
 
 namespace Emby.Naming.TV
 {
+    /// <summary>
+    /// Used to resolve information about episode from path.
+    /// </summary>
     public class EpisodeResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EpisodeResolver"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing VideoFileExtensions and passed to <see cref="StubResolver"/>, <see cref="FlagParser"/>, <see cref="Format3DParser"/> and <see cref="EpisodePathParser"/>.</param>
         public EpisodeResolver(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Resolve information about episode from path.
+        /// </summary>
+        /// <param name="path">Path.</param>
+        /// <param name="isDirectory">Is path for a directory or file.</param>
+        /// <param name="isNamed">Do we want to use IsNamed expressions.</param>
+        /// <param name="isOptimistic">Do we want to use Optimistic expressions.</param>
+        /// <param name="supportsAbsoluteNumbers">Do we want to use expressions supporting absolute episode numbers.</param>
+        /// <param name="fillExtendedInfo">Should we attempt to retrieve extended information.</param>
+        /// <returns>Returns null or <see cref="EpisodeInfo"/> object if successful.</returns>
         public EpisodeInfo? Resolve(
             string path,
             bool isDirectory,
@@ -54,12 +68,11 @@ namespace Emby.Naming.TV
             var parsingResult = new EpisodePathParser(_options)
                 .Parse(path, isDirectory, isNamed, isOptimistic, supportsAbsoluteNumbers, fillExtendedInfo);
 
-            return new EpisodeInfo
+            return new EpisodeInfo(path)
             {
-                Path = path,
                 Container = container,
                 IsStub = isStub,
-                EndingEpsiodeNumber = parsingResult.EndingEpsiodeNumber,
+                EndingEpisodeNumber = parsingResult.EndingEpisodeNumber,
                 EpisodeNumber = parsingResult.EpisodeNumber,
                 SeasonNumber = parsingResult.SeasonNumber,
                 SeriesName = parsingResult.SeriesName,

Emby.Naming/TV/SeasonPathParser.cs

@@ -1,11 +1,12 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Globalization;
 using System.IO;
 
 namespace Emby.Naming.TV
 {
+    /// <summary>
+    /// Class to parse season paths.
+    /// </summary>
     public static class SeasonPathParser
     {
         /// <summary>
@@ -23,6 +24,13 @@ namespace Emby.Naming.TV
             "stagione"
         };
 
+        /// <summary>
+        /// Attempts to parse season number from path.
+        /// </summary>
+        /// <param name="path">Path to season.</param>
+        /// <param name="supportSpecialAliases">Support special aliases when parsing.</param>
+        /// <param name="supportNumericSeasonFolders">Support numeric season folders when parsing.</param>
+        /// <returns>Returns <see cref="SeasonPathParserResult"/> object.</returns>
         public static SeasonPathParserResult Parse(string path, bool supportSpecialAliases, bool supportNumericSeasonFolders)
         {
             var result = new SeasonPathParserResult();
@@ -101,9 +109,9 @@ namespace Emby.Naming.TV
             }
 
             var parts = filename.Split(new[] { '.', '_', ' ', '-' }, StringSplitOptions.RemoveEmptyEntries);
-            for (int i = 0; i < parts.Length; i++)
+            foreach (var part in parts)
             {
-                if (TryGetSeasonNumberFromPart(parts[i], out int seasonNumber))
+                if (TryGetSeasonNumberFromPart(part, out int seasonNumber))
                 {
                     return (seasonNumber, true);
                 }
@@ -139,7 +147,7 @@ namespace Emby.Naming.TV
             var numericStart = -1;
             var length = 0;
 
-            var hasOpenParenth = false;
+            var hasOpenParenthesis = false;
             var isSeasonFolder = true;
 
             // Find out where the numbers start, and then keep going until they end
@@ -147,7 +155,7 @@ namespace Emby.Naming.TV
             {
                 if (char.IsNumber(path[i]))
                 {
-                    if (!hasOpenParenth)
+                    if (!hasOpenParenthesis)
                     {
                         if (numericStart == -1)
                         {
@@ -167,11 +175,11 @@ namespace Emby.Naming.TV
                 var currentChar = path[i];
                 if (currentChar == '(')
                 {
-                    hasOpenParenth = true;
+                    hasOpenParenthesis = true;
                 }
                 else if (currentChar == ')')
                 {
-                    hasOpenParenth = false;
+                    hasOpenParenthesis = false;
                 }
             }
 

Emby.Naming/TV/SeasonPathParserResult.cs

@@ -1,7 +1,8 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.TV
 {
+    /// <summary>
+    /// Data object to pass result of <see cref="SeasonPathParser"/>.
+    /// </summary>
     public class SeasonPathParserResult
     {
         /// <summary>
@@ -16,6 +17,10 @@ namespace Emby.Naming.TV
         /// <value><c>true</c> if success; otherwise, <c>false</c>.</value>
         public bool Success { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether "Is season folder".
+        /// Seems redundant and barely used.
+        /// </summary>
         public bool IsSeasonFolder { get; set; }
     }
 }

Emby.Naming/Video/CleanDateTimeParser.cs

@@ -1,6 +1,3 @@
-#pragma warning disable CS1591
-#nullable enable
-
 using System.Collections.Generic;
 using System.Globalization;
 using System.Text.RegularExpressions;
@@ -12,9 +9,20 @@ namespace Emby.Naming.Video
     /// </summary>
     public static class CleanDateTimeParser
     {
+        /// <summary>
+        /// Attempts to clean the name.
+        /// </summary>
+        /// <param name="name">Name of video.</param>
+        /// <param name="cleanDateTimeRegexes">Optional list of regexes to clean the name.</param>
+        /// <returns>Returns <see cref="CleanDateTimeResult"/> object.</returns>
         public static CleanDateTimeResult Clean(string name, IReadOnlyList<Regex> cleanDateTimeRegexes)
         {
             CleanDateTimeResult result = new CleanDateTimeResult(name);
+            if (string.IsNullOrEmpty(name))
+            {
+                return result;
+            }
+
             var len = cleanDateTimeRegexes.Count;
             for (int i = 0; i < len; i++)
             {

Emby.Naming/Video/CleanDateTimeResult.cs

@@ -1,22 +1,21 @@
-#pragma warning disable CS1591
-#nullable enable
-
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Holder structure for name and year.
+    /// </summary>
     public readonly struct CleanDateTimeResult
     {
-        public CleanDateTimeResult(string name, int? year)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CleanDateTimeResult"/> struct.
+        /// </summary>
+        /// <param name="name">Name of video.</param>
+        /// <param name="year">Year of release.</param>
+        public CleanDateTimeResult(string name, int? year = null)
         {
             Name = name;
             Year = year;
         }
 
-        public CleanDateTimeResult(string name)
-        {
-            Name = name;
-            Year = null;
-        }
-
         /// <summary>
         /// Gets the name.
         /// </summary>

Emby.Naming/Video/CleanStringParser.cs

@@ -1,6 +1,3 @@
-#pragma warning disable CS1591
-#nullable enable
-
 using System;
 using System.Collections.Generic;
 using System.Text.RegularExpressions;
@@ -12,6 +9,13 @@ namespace Emby.Naming.Video
     /// </summary>
     public static class CleanStringParser
     {
+        /// <summary>
+        /// Attempts to extract clean name with regular expressions.
+        /// </summary>
+        /// <param name="name">Name of file.</param>
+        /// <param name="expressions">List of regex to parse name and year from.</param>
+        /// <param name="newName">Parsing result string.</param>
+        /// <returns>True if parsing was successful.</returns>
         public static bool TryClean(string name, IReadOnlyList<Regex> expressions, out ReadOnlySpan<char> newName)
         {
             var len = expressions.Count;

Emby.Naming/Video/ExtraResolver.cs

@@ -1,5 +1,3 @@
-#pragma warning disable CS1591
-
 using System;
 using System.IO;
 using System.Linq;
@@ -9,15 +7,27 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Resolve if file is extra for video.
+    /// </summary>
     public class ExtraResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ExtraResolver"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing VideoExtraRules and passed to <see cref="AudioFileParser"/> and <see cref="VideoResolver"/>.</param>
         public ExtraResolver(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Attempts to resolve if file is extra.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>Returns <see cref="ExtraResult"/> object.</returns>
         public ExtraResult GetExtraInfo(string path)
         {
             return _options.VideoExtraRules
@@ -43,10 +53,6 @@ namespace Emby.Naming.Video
                     return result;
                 }
             }
-            else
-            {
-                return result;
-            }
 
             if (rule.RuleType == ExtraRuleType.Filename)
             {

Emby.Naming/Video/ExtraResult.cs

@@ -1,9 +1,10 @@
-#pragma warning disable CS1591
-
 using MediaBrowser.Model.Entities;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Holder object for passing results from ExtraResolver.
+    /// </summary>
     public class ExtraResult
     {
         /// <summary>
@@ -16,6 +17,6 @@ namespace Emby.Naming.Video
         /// Gets or sets the rule.
         /// </summary>
         /// <value>The rule.</value>
-        public ExtraRule Rule { get; set; }
+        public ExtraRule? Rule { get; set; }
     }
 }

Emby.Naming/Video/ExtraRule.cs

@@ -1,5 +1,3 @@
-#pragma warning disable CS1591
-
 using MediaBrowser.Model.Entities;
 using MediaType = Emby.Naming.Common.MediaType;
 
@@ -10,6 +8,21 @@ namespace Emby.Naming.Video
     /// </summary>
     public class ExtraRule
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ExtraRule"/> class.
+        /// </summary>
+        /// <param name="extraType">Type of extra.</param>
+        /// <param name="ruleType">Type of rule.</param>
+        /// <param name="token">Token.</param>
+        /// <param name="mediaType">Media type.</param>
+        public ExtraRule(ExtraType extraType, ExtraRuleType ruleType, string token, MediaType mediaType)
+        {
+            Token = token;
+            ExtraType = extraType;
+            RuleType = ruleType;
+            MediaType = mediaType;
+        }
+
         /// <summary>
         /// Gets or sets the token to use for matching against the file path.
         /// </summary>

Emby.Naming/Video/ExtraRuleType.cs

@@ -1,7 +1,8 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Extra rules type to determine against what <see cref="ExtraRule.Token"/> should be matched.
+    /// </summary>
     public enum ExtraRuleType
     {
         /// <summary>
@@ -22,6 +23,6 @@ namespace Emby.Naming.Video
         /// <summary>
         /// Match <see cref="ExtraRule.Token"/> against the name of the directory containing the file.
         /// </summary>
-        DirectoryName = 3,
+        DirectoryName = 3
     }
 }

Emby.Naming/Video/FileStack.cs

@@ -1,24 +1,43 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Collections.Generic;
 using System.Linq;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Object holding list of files paths with additional information.
+    /// </summary>
     public class FileStack
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FileStack"/> class.
+        /// </summary>
         public FileStack()
         {
             Files = new List<string>();
         }
 
-        public string Name { get; set; }
+        /// <summary>
+        /// Gets or sets name of file stack.
+        /// </summary>
+        public string Name { get; set; } = string.Empty;
 
+        /// <summary>
+        /// Gets or sets list of paths in stack.
+        /// </summary>
         public List<string> Files { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether stack is directory stack.
+        /// </summary>
         public bool IsDirectoryStack { get; set; }
 
+        /// <summary>
+        /// Helper function to determine if path is in the stack.
+        /// </summary>
+        /// <param name="file">Path of desired file.</param>
+        /// <param name="isDirectory">Requested type of stack.</param>
+        /// <returns>True if file is in the stack.</returns>
         public bool ContainsFile(string file, bool isDirectory)
         {
             if (IsDirectoryStack == isDirectory)

Emby.Naming/Video/FlagParser.cs

@@ -1,37 +1,53 @@
-#pragma warning disable CS1591
-
 using System;
 using System.IO;
 using Emby.Naming.Common;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Parses list of flags from filename based on delimiters.
+    /// </summary>
     public class FlagParser
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FlagParser"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing VideoFlagDelimiters.</param>
         public FlagParser(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Calls GetFlags function with _options.VideoFlagDelimiters parameter.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>List of found flags.</returns>
         public string[] GetFlags(string path)
         {
             return GetFlags(path, _options.VideoFlagDelimiters);
         }
 
-        public string[] GetFlags(string path, char[] delimeters)
+        /// <summary>
+        /// Parses flags from filename based on delimiters.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <param name="delimiters">Delimiters used to extract flags.</param>
+        /// <returns>List of found flags.</returns>
+        public string[] GetFlags(string path, char[] delimiters)
         {
             if (string.IsNullOrEmpty(path))
             {
-                throw new ArgumentNullException(nameof(path));
+                return Array.Empty<string>();
             }
 
             // Note: the tags need be be surrounded be either a space ( ), hyphen -, dot . or underscore _.
 
             var file = Path.GetFileName(path);
 
-            return file.Split(delimeters, StringSplitOptions.RemoveEmptyEntries);
+            return file.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
         }
     }
 }

Emby.Naming/Video/Format3DParser.cs

@@ -1,28 +1,38 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Linq;
 using Emby.Naming.Common;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Parste 3D format related flags.
+    /// </summary>
     public class Format3DParser
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Format3DParser"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing VideoFlagDelimiters and passes options to <see cref="FlagParser"/>.</param>
         public Format3DParser(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Parse 3D format related flags.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>Returns <see cref="Format3DResult"/> object.</returns>
         public Format3DResult Parse(string path)
         {
             int oldLen = _options.VideoFlagDelimiters.Length;
-            var delimeters = new char[oldLen + 1];
-            _options.VideoFlagDelimiters.CopyTo(delimeters, 0);
-            delimeters[oldLen] = ' ';
+            var delimiters = new char[oldLen + 1];
+            _options.VideoFlagDelimiters.CopyTo(delimiters, 0);
+            delimiters[oldLen] = ' ';
 
-            return Parse(new FlagParser(_options).GetFlags(path, delimeters));
+            return Parse(new FlagParser(_options).GetFlags(path, delimiters));
         }
 
         internal Format3DResult Parse(string[] videoFlags)
@@ -44,7 +54,7 @@ namespace Emby.Naming.Video
         {
             var result = new Format3DResult();
 
-            if (string.IsNullOrEmpty(rule.PreceedingToken))
+            if (string.IsNullOrEmpty(rule.PrecedingToken))
             {
                 result.Format3D = new[] { rule.Token }.FirstOrDefault(i => videoFlags.Contains(i, StringComparer.OrdinalIgnoreCase));
                 result.Is3D = !string.IsNullOrEmpty(result.Format3D);
@@ -57,13 +67,13 @@ namespace Emby.Naming.Video
             else
             {
                 var foundPrefix = false;
-                string format = null;
+                string? format = null;
 
                 foreach (var flag in videoFlags)
                 {
                     if (foundPrefix)
                     {
-                        result.Tokens.Add(rule.PreceedingToken);
+                        result.Tokens.Add(rule.PrecedingToken);
 
                         if (string.Equals(rule.Token, flag, StringComparison.OrdinalIgnoreCase))
                         {
@@ -74,7 +84,7 @@ namespace Emby.Naming.Video
                         break;
                     }
 
-                    foundPrefix = string.Equals(flag, rule.PreceedingToken, StringComparison.OrdinalIgnoreCase);
+                    foundPrefix = string.Equals(flag, rule.PrecedingToken, StringComparison.OrdinalIgnoreCase);
                 }
 
                 result.Is3D = foundPrefix && !string.IsNullOrEmpty(format);

Emby.Naming/Video/Format3DResult.cs

@@ -1,11 +1,15 @@
-#pragma warning disable CS1591
-
 using System.Collections.Generic;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Helper object to return data from <see cref="Format3DParser"/>.
+    /// </summary>
     public class Format3DResult
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Format3DResult"/> class.
+        /// </summary>
         public Format3DResult()
         {
             Tokens = new List<string>();
@@ -21,7 +25,7 @@ namespace Emby.Naming.Video
         /// Gets or sets the format3 d.
         /// </summary>
         /// <value>The format3 d.</value>
-        public string Format3D { get; set; }
+        public string? Format3D { get; set; }
 
         /// <summary>
         /// Gets or sets the tokens.

Emby.Naming/Video/Format3DRule.cs

@@ -1,9 +1,21 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Data holder class for 3D format rule.
+    /// </summary>
     public class Format3DRule
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Format3DRule"/> class.
+        /// </summary>
+        /// <param name="token">Token.</param>
+        /// <param name="precedingToken">Token present before current token.</param>
+        public Format3DRule(string token, string? precedingToken = null)
+        {
+            Token = token;
+            PrecedingToken = precedingToken;
+        }
+
         /// <summary>
         /// Gets or sets the token.
         /// </summary>
@@ -11,9 +23,9 @@ namespace Emby.Naming.Video
         public string Token { get; set; }
 
         /// <summary>
-        /// Gets or sets the preceeding token.
+        /// Gets or sets the preceding token.
         /// </summary>
-        /// <value>The preceeding token.</value>
-        public string PreceedingToken { get; set; }
+        /// <value>The preceding token.</value>
+        public string? PrecedingToken { get; set; }
     }
 }

Emby.Naming/Video/StackResolver.cs

@@ -1,58 +1,88 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
+using Emby.Naming.AudioBook;
 using Emby.Naming.Common;
 using MediaBrowser.Model.IO;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Resolve <see cref="FileStack"/> from list of paths.
+    /// </summary>
     public class StackResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StackResolver"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing VideoFileStackingRegexes and passes options to <see cref="VideoResolver"/>.</param>
         public StackResolver(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Resolves only directories from paths.
+        /// </summary>
+        /// <param name="files">List of paths.</param>
+        /// <returns>Enumerable <see cref="FileStack"/> of directories.</returns>
         public IEnumerable<FileStack> ResolveDirectories(IEnumerable<string> files)
         {
             return Resolve(files.Select(i => new FileSystemMetadata { FullName = i, IsDirectory = true }));
         }
 
+        /// <summary>
+        /// Resolves only files from paths.
+        /// </summary>
+        /// <param name="files">List of paths.</param>
+        /// <returns>Enumerable <see cref="FileStack"/> of files.</returns>
         public IEnumerable<FileStack> ResolveFiles(IEnumerable<string> files)
         {
             return Resolve(files.Select(i => new FileSystemMetadata { FullName = i, IsDirectory = false }));
         }
 
-        public IEnumerable<FileStack> ResolveAudioBooks(IEnumerable<FileSystemMetadata> files)
+        /// <summary>
+        /// Resolves audiobooks from paths.
+        /// </summary>
+        /// <param name="files">List of paths.</param>
+        /// <returns>Enumerable <see cref="FileStack"/> of directories.</returns>
+        public IEnumerable<FileStack> ResolveAudioBooks(IEnumerable<AudioBookFileInfo> files)
         {
-            var groupedDirectoryFiles = files.GroupBy(file =>
-                file.IsDirectory
-                    ? file.FullName
-                    : Path.GetDirectoryName(file.FullName));
+            var groupedDirectoryFiles = files.GroupBy(file => Path.GetDirectoryName(file.Path));
 
             foreach (var directory in groupedDirectoryFiles)
             {
-                var stack = new FileStack { Name = Path.GetFileName(directory.Key), IsDirectoryStack = false };
-                foreach (var file in directory)
+                if (string.IsNullOrEmpty(directory.Key))
                 {
-                    if (file.IsDirectory)
+                    foreach (var file in directory)
                     {
-                        continue;
+                        var stack = new FileStack { Name = Path.GetFileNameWithoutExtension(file.Path), IsDirectoryStack = false };
+                        stack.Files.Add(file.Path);
+                        yield return stack;
+                    }
+                }
+                else
+                {
+                    var stack = new FileStack { Name = Path.GetFileName(directory.Key), IsDirectoryStack = false };
+                    foreach (var file in directory)
+                    {
+                        stack.Files.Add(file.Path);
                     }
 
-                    stack.Files.Add(file.FullName);
+                    yield return stack;
                 }
-
-                yield return stack;
             }
         }
 
+        /// <summary>
+        /// Resolves videos from paths.
+        /// </summary>
+        /// <param name="files">List of paths.</param>
+        /// <returns>Enumerable <see cref="FileStack"/> of videos.</returns>
         public IEnumerable<FileStack> Resolve(IEnumerable<FileSystemMetadata> files)
         {
             var resolver = new VideoResolver(_options);
@@ -81,10 +111,10 @@ namespace Emby.Naming.Video
 
                     if (match1.Success)
                     {
-                        var title1 = match1.Groups[1].Value;
-                        var volume1 = match1.Groups[2].Value;
-                        var ignore1 = match1.Groups[3].Value;
-                        var extension1 = match1.Groups[4].Value;
+                        var title1 = match1.Groups["title"].Value;
+                        var volume1 = match1.Groups["volume"].Value;
+                        var ignore1 = match1.Groups["ignore"].Value;
+                        var extension1 = match1.Groups["extension"].Value;
 
                         var j = i + 1;
                         while (j < list.Count)

Emby.Naming/Video/StubResolver.cs

@@ -1,6 +1,3 @@
-#pragma warning disable CS1591
-#nullable enable
-
 using System;
 using System.IO;
 using System.Linq;
@@ -8,13 +5,23 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Resolve if file is stub (.disc).
+    /// </summary>
     public static class StubResolver
     {
+        /// <summary>
+        /// Tries to resolve if file is stub (.disc).
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <param name="options">NamingOptions containing StubFileExtensions and StubTypes.</param>
+        /// <param name="stubType">Stub type.</param>
+        /// <returns>True if file is a stub.</returns>
         public static bool TryResolveFile(string path, NamingOptions options, out string? stubType)
         {
             stubType = default;
 
-            if (path == null)
+            if (string.IsNullOrEmpty(path))
             {
                 return false;
             }

Emby.Naming/Video/StubResult.cs

@@ -1,19 +0,0 @@
-#pragma warning disable CS1591
-
-namespace Emby.Naming.Video
-{
-    public struct StubResult
-    {
-        /// <summary>
-        /// Gets or sets a value indicating whether this instance is stub.
-        /// </summary>
-        /// <value><c>true</c> if this instance is stub; otherwise, <c>false</c>.</value>
-        public bool IsStub { get; set; }
-
-        /// <summary>
-        /// Gets or sets the type of the stub.
-        /// </summary>
-        /// <value>The type of the stub.</value>
-        public string StubType { get; set; }
-    }
-}

Emby.Naming/Video/StubTypeRule.cs

@@ -1,9 +1,21 @@
-#pragma warning disable CS1591
-
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Data class holding information about Stub type rule.
+    /// </summary>
     public class StubTypeRule
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StubTypeRule"/> class.
+        /// </summary>
+        /// <param name="token">Token.</param>
+        /// <param name="stubType">Stub type.</param>
+        public StubTypeRule(string token, string stubType)
+        {
+            Token = token;
+            StubType = stubType;
+        }
+
         /// <summary>
         /// Gets or sets the token.
         /// </summary>

Emby.Naming/Video/VideoFileInfo.cs

@@ -7,6 +7,35 @@ namespace Emby.Naming.Video
     /// </summary>
     public class VideoFileInfo
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VideoFileInfo"/> class.
+        /// </summary>
+        /// <param name="name">Name of file.</param>
+        /// <param name="path">Path to the file.</param>
+        /// <param name="container">Container type.</param>
+        /// <param name="year">Year of release.</param>
+        /// <param name="extraType">Extra type.</param>
+        /// <param name="extraRule">Extra rule.</param>
+        /// <param name="format3D">Format 3D.</param>
+        /// <param name="is3D">Is 3D.</param>
+        /// <param name="isStub">Is Stub.</param>
+        /// <param name="stubType">Stub type.</param>
+        /// <param name="isDirectory">Is directory.</param>
+        public VideoFileInfo(string name, string path, string? container, int? year = default, ExtraType? extraType = default, ExtraRule? extraRule = default, string? format3D = default, bool is3D = default, bool isStub = default, string? stubType = default, bool isDirectory = default)
+        {
+            Path = path;
+            Container = container;
+            Name = name;
+            Year = year;
+            ExtraType = extraType;
+            ExtraRule = extraRule;
+            Format3D = format3D;
+            Is3D = is3D;
+            IsStub = isStub;
+            StubType = stubType;
+            IsDirectory = isDirectory;
+        }
+
         /// <summary>
         /// Gets or sets the path.
         /// </summary>
@@ -17,7 +46,7 @@ namespace Emby.Naming.Video
         /// Gets or sets the container.
         /// </summary>
         /// <value>The container.</value>
-        public string Container { get; set; }
+        public string? Container { get; set; }
 
         /// <summary>
         /// Gets or sets the name.
@@ -41,13 +70,13 @@ namespace Emby.Naming.Video
         /// Gets or sets the extra rule.
         /// </summary>
         /// <value>The extra rule.</value>
-        public ExtraRule ExtraRule { get; set; }
+        public ExtraRule? ExtraRule { get; set; }
 
         /// <summary>
         /// Gets or sets the format3 d.
         /// </summary>
         /// <value>The format3 d.</value>
-        public string Format3D { get; set; }
+        public string? Format3D { get; set; }
 
         /// <summary>
         /// Gets or sets a value indicating whether [is3 d].
@@ -65,7 +94,7 @@ namespace Emby.Naming.Video
         /// Gets or sets the type of the stub.
         /// </summary>
         /// <value>The type of the stub.</value>
-        public string StubType { get; set; }
+        public string? StubType { get; set; }
 
         /// <summary>
         /// Gets or sets a value indicating whether this instance is a directory.
@@ -84,8 +113,7 @@ namespace Emby.Naming.Video
         /// <inheritdoc />
         public override string ToString()
         {
-            // Makes debugging easier
-            return Name ?? base.ToString();
+            return "VideoFileInfo(Name: '" + Name + "')";
         }
     }
 }

Emby.Naming/Video/VideoInfo.cs

@@ -12,7 +12,7 @@ namespace Emby.Naming.Video
         /// Initializes a new instance of the <see cref="VideoInfo" /> class.
         /// </summary>
         /// <param name="name">The name.</param>
-        public VideoInfo(string name)
+        public VideoInfo(string? name)
         {
             Name = name;
 
@@ -25,7 +25,7 @@ namespace Emby.Naming.Video
         /// Gets or sets the name.
         /// </summary>
         /// <value>The name.</value>
-        public string Name { get; set; }
+        public string? Name { get; set; }
 
         /// <summary>
         /// Gets or sets the year.

Emby.Naming/Video/VideoListResolver.cs

@@ -1,5 +1,3 @@
-#pragma warning disable CS1591
-
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -11,22 +9,35 @@ using MediaBrowser.Model.IO;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Resolves alternative versions and extras from list of video files.
+    /// </summary>
     public class VideoListResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VideoListResolver"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing CleanStringRegexes and VideoFlagDelimiters and passes options to <see cref="StackResolver"/> and <see cref="VideoResolver"/>.</param>
         public VideoListResolver(NamingOptions options)
         {
             _options = options;
         }
 
+        /// <summary>
+        /// Resolves alternative versions and extras from list of video files.
+        /// </summary>
+        /// <param name="files">List of related video files.</param>
+        /// <param name="supportMultiVersion">Indication we should consider multi-versions of content.</param>
+        /// <returns>Returns enumerable of <see cref="VideoInfo"/> which groups files togeather when related.</returns>
         public IEnumerable<VideoInfo> Resolve(List<FileSystemMetadata> files, bool supportMultiVersion = true)
         {
             var videoResolver = new VideoResolver(_options);
 
             var videoInfos = files
                 .Select(i => videoResolver.Resolve(i.FullName, i.IsDirectory))
-                .Where(i => i != null)
+                .OfType<VideoFileInfo>()
                 .ToList();
 
             // Filter out all extras, otherwise they could cause stacks to not be resolved
@@ -39,7 +50,7 @@ namespace Emby.Naming.Video
                 .Resolve(nonExtras).ToList();
 
             var remainingFiles = videoInfos
-                .Where(i => !stackResult.Any(s => s.ContainsFile(i.Path, i.IsDirectory)))
+                .Where(i => !stackResult.Any(s => i.Path != null && s.ContainsFile(i.Path, i.IsDirectory)))
                 .ToList();
 
             var list = new List<VideoInfo>();
@@ -48,7 +59,9 @@ namespace Emby.Naming.Video
             {
                 var info = new VideoInfo(stack.Name)
                 {
-                    Files = stack.Files.Select(i => videoResolver.Resolve(i, stack.IsDirectoryStack)).ToList()
+                    Files = stack.Files.Select(i => videoResolver.Resolve(i, stack.IsDirectoryStack))
+                        .OfType<VideoFileInfo>()
+                        .ToList()
                 };
 
                 info.Year = info.Files[0].Year;
@@ -133,7 +146,7 @@ namespace Emby.Naming.Video
             }
 
             // If there's only one video, accept all trailers
-            // Be lenient because people use all kinds of mish mash conventions with trailers
+            // Be lenient because people use all kinds of mishmash conventions with trailers.
             if (list.Count == 1)
             {
                 var trailers = remainingFiles
@@ -203,15 +216,21 @@ namespace Emby.Naming.Video
             return videos.Select(i => i.Year ?? -1).Distinct().Count() < 2;
         }
 
-        private bool IsEligibleForMultiVersion(string folderName, string testFilename)
+        private bool IsEligibleForMultiVersion(string folderName, string? testFilename)
         {
             testFilename = Path.GetFileNameWithoutExtension(testFilename) ?? string.Empty;
 
             if (testFilename.StartsWith(folderName, StringComparison.OrdinalIgnoreCase))
             {
+                if (CleanStringParser.TryClean(testFilename, _options.CleanStringRegexes, out var cleanName))
+                {
+                    testFilename = cleanName.ToString();
+                }
+
                 testFilename = testFilename.Substring(folderName.Length).Trim();
                 return string.IsNullOrEmpty(testFilename)
-                   || testFilename[0] == '-'
+                   || testFilename[0].Equals('-')
+                   || testFilename[0].Equals('_')
                    || string.IsNullOrWhiteSpace(Regex.Replace(testFilename, @"\[([^]]*)\]", string.Empty));
             }
 

Emby.Naming/Video/VideoResolver.cs

@@ -1,6 +1,3 @@
-#pragma warning disable CS1591
-#nullable enable
-
 using System;
 using System.IO;
 using System.Linq;
@@ -8,10 +5,18 @@ using Emby.Naming.Common;
 
 namespace Emby.Naming.Video
 {
+    /// <summary>
+    /// Resolves <see cref="VideoFileInfo"/> from file path.
+    /// </summary>
     public class VideoResolver
     {
         private readonly NamingOptions _options;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VideoResolver"/> class.
+        /// </summary>
+        /// <param name="options"><see cref="NamingOptions"/> object containing VideoFileExtensions, StubFileExtensions, CleanStringRegexes and CleanDateTimeRegexes
+        /// and passes options in <see cref="StubResolver"/>, <see cref="FlagParser"/>, <see cref="Format3DParser"/> and <see cref="ExtraResolver"/>.</param>
         public VideoResolver(NamingOptions options)
         {
             _options = options;
@@ -22,7 +27,7 @@ namespace Emby.Naming.Video
         /// </summary>
         /// <param name="path">The path.</param>
         /// <returns>VideoFileInfo.</returns>
-        public VideoFileInfo? ResolveDirectory(string path)
+        public VideoFileInfo? ResolveDirectory(string? path)
         {
             return Resolve(path, true);
         }
@@ -32,7 +37,7 @@ namespace Emby.Naming.Video
         /// </summary>
         /// <param name="path">The path.</param>
         /// <returns>VideoFileInfo.</returns>
-        public VideoFileInfo? ResolveFile(string path)
+        public VideoFileInfo? ResolveFile(string? path)
         {
             return Resolve(path, false);
         }
@@ -45,11 +50,11 @@ namespace Emby.Naming.Video
         /// <param name="parseName">Whether or not the name should be parsed for info.</param>
         /// <returns>VideoFileInfo.</returns>
         /// <exception cref="ArgumentNullException"><c>path</c> is <c>null</c>.</exception>
-        public VideoFileInfo? Resolve(string path, bool isDirectory, bool parseName = true)
+        public VideoFileInfo? Resolve(string? path, bool isDirectory, bool parseName = true)
         {
             if (string.IsNullOrEmpty(path))
             {
-                throw new ArgumentNullException(nameof(path));
+                return null;
             }
 
             bool isStub = false;
@@ -99,39 +104,58 @@ namespace Emby.Naming.Video
                 }
             }
 
-            return new VideoFileInfo
-            {
-                Path = path,
-                Container = container,
-                IsStub = isStub,
-                Name = name,
-                Year = year,
-                StubType = stubType,
-                Is3D = format3DResult.Is3D,
-                Format3D = format3DResult.Format3D,
-                ExtraType = extraResult.ExtraType,
-                IsDirectory = isDirectory,
-                ExtraRule = extraResult.Rule
-            };
+            return new VideoFileInfo(
+                path: path,
+                container: container,
+                isStub: isStub,
+                name: name,
+                year: year,
+                stubType: stubType,
+                is3D: format3DResult.Is3D,
+                format3D: format3DResult.Format3D,
+                extraType: extraResult.ExtraType,
+                isDirectory: isDirectory,
+                extraRule: extraResult.Rule);
         }
 
+        /// <summary>
+        /// Determines if path is video file based on extension.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>True if is video file.</returns>
         public bool IsVideoFile(string path)
         {
             var extension = Path.GetExtension(path) ?? string.Empty;
             return _options.VideoFileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase);
         }
 
+        /// <summary>
+        /// Determines if path is video file stub based on extension.
+        /// </summary>
+        /// <param name="path">Path to file.</param>
+        /// <returns>True if is video file stub.</returns>
         public bool IsStubFile(string path)
         {
             var extension = Path.GetExtension(path) ?? string.Empty;
             return _options.StubFileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase);
         }
 
+        /// <summary>
+        /// Tries to clean name of clutter.
+        /// </summary>
+        /// <param name="name">Raw name.</param>
+        /// <param name="newName">Clean name.</param>
+        /// <returns>True if cleaning of name was successful.</returns>
         public bool TryCleanString(string name, out ReadOnlySpan<char> newName)
         {
             return CleanStringParser.TryClean(name, _options.CleanStringRegexes, out newName);
         }
 
+        /// <summary>
+        /// Tries to get name and year from raw name.
+        /// </summary>
+        /// <param name="name">Raw name.</param>
+        /// <returns>Returns <see cref="CleanDateTimeResult"/> with name and optional year.</returns>
         public CleanDateTimeResult CleanDateTime(string name)
         {
             return CleanDateTimeParser.Clean(name, _options.CleanDateTimeRegexes);

Emby.Notifications/Emby.Notifications.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>

Emby.Notifications/NotificationEntryPoint.cs

@@ -83,7 +83,7 @@ namespace Emby.Notifications
             return Task.CompletedTask;
         }
 
-        private async void OnAppHostHasPendingRestartChanged(object sender, EventArgs e)
+        private async void OnAppHostHasPendingRestartChanged(object? sender, EventArgs e)
         {
             var type = NotificationType.ServerRestartRequired.ToString();
 
@@ -99,7 +99,7 @@ namespace Emby.Notifications
             await SendNotification(notification, null).ConfigureAwait(false);
         }
 
-        private async void OnActivityManagerEntryCreated(object sender, GenericEventArgs<ActivityLogEntry> e)
+        private async void OnActivityManagerEntryCreated(object? sender, GenericEventArgs<ActivityLogEntry> e)
         {
             var entry = e.Argument;
 
@@ -132,7 +132,7 @@ namespace Emby.Notifications
             return _config.GetConfiguration<NotificationOptions>("notifications");
         }
 
-        private async void OnAppHostHasUpdateAvailableChanged(object sender, EventArgs e)
+        private async void OnAppHostHasUpdateAvailableChanged(object? sender, EventArgs e)
         {
             if (!_appHost.HasUpdateAvailable)
             {
@@ -151,7 +151,7 @@ namespace Emby.Notifications
             await SendNotification(notification, null).ConfigureAwait(false);
         }
 
-        private void OnLibraryManagerItemAdded(object sender, ItemChangeEventArgs e)
+        private void OnLibraryManagerItemAdded(object? sender, ItemChangeEventArgs e)
         {
             if (!FilterItem(e.Item))
             {
@@ -197,7 +197,7 @@ namespace Emby.Notifications
             return item.SourceType == SourceType.Library;
         }
 
-        private async void LibraryUpdateTimerCallback(object state)
+        private async void LibraryUpdateTimerCallback(object? state)
         {
             List<BaseItem> items;
 
@@ -209,7 +209,10 @@ namespace Emby.Notifications
                 _libraryUpdateTimer = null;
             }
 
-            items = items.Take(10).ToList();
+            if (items.Count > 10)
+            {
+                items = items.GetRange(0, 10);
+            }
 
             foreach (var item in items)
             {

Emby.Photos/Emby.Photos.csproj

@@ -19,7 +19,7 @@
   </ItemGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>

Emby.Server.Implementations/AppBase/BaseApplicationPaths.cs

@@ -62,7 +62,7 @@ namespace Emby.Server.Implementations.AppBase
         }
 
         /// <inheritdoc />
-        public string VirtualDataPath { get; } = "%AppDataPath%";
+        public string VirtualDataPath => "%AppDataPath%";
 
         /// <summary>
         /// Gets the image cache path.

Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs

@@ -133,6 +133,33 @@ namespace Emby.Server.Implementations.AppBase
             }
         }
 
+        /// <summary>
+        /// Manually pre-loads a factory so that it is available pre system initialisation.
+        /// </summary>
+        /// <typeparam name="T">Class to register.</typeparam>
+        public virtual void RegisterConfiguration<T>()
+            where T : IConfigurationFactory
+        {
+            IConfigurationFactory factory = Activator.CreateInstance<T>();
+
+            if (_configurationFactories == null)
+            {
+                _configurationFactories = new[] { factory };
+            }
+            else
+            {
+                var oldLen = _configurationFactories.Length;
+                var arr = new IConfigurationFactory[oldLen + 1];
+                _configurationFactories.CopyTo(arr, 0);
+                arr[oldLen] = factory;
+                _configurationFactories = arr;
+            }
+
+            _configurationStores = _configurationFactories
+                .SelectMany(i => i.GetConfigurations())
+                .ToArray();
+        }
+
         /// <summary>
         /// Adds parts.
         /// </summary>

Emby.Server.Implementations/AppBase/ConfigurationHelper.cs

@@ -3,6 +3,7 @@
 using System;
 using System.IO;
 using System.Linq;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Model.Serialization;
 
 namespace Emby.Server.Implementations.AppBase
@@ -35,7 +36,7 @@ namespace Emby.Server.Implementations.AppBase
             }
             catch (Exception)
             {
-                configuration = Activator.CreateInstance(type);
+                configuration = Activator.CreateInstance(type) ?? throw new ArgumentException($"Provided path ({type}) is not valid.", nameof(type));
             }
 
             using var stream = new MemoryStream(buffer?.Length ?? 0);
@@ -48,8 +49,9 @@ namespace Emby.Server.Implementations.AppBase
             // If the file didn't exist before, or if something has changed, re-save
             if (buffer == null || !newBytes.AsSpan(0, newBytesLen).SequenceEqual(buffer))
             {
-                Directory.CreateDirectory(Path.GetDirectoryName(path));
+                var directory = Path.GetDirectoryName(path) ?? throw new ArgumentException($"Provided path ({path}) is not valid.", nameof(path));
 
+                Directory.CreateDirectory(directory);
                 // Save it after load in case we got new items
                 using (var fs = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read))
                 {

Emby.Server.Implementations/ApplicationHost.cs

@@ -4,7 +4,6 @@ using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Net;
@@ -30,7 +29,6 @@ using Emby.Server.Implementations.Cryptography;
 using Emby.Server.Implementations.Data;
 using Emby.Server.Implementations.Devices;
 using Emby.Server.Implementations.Dto;
-using Emby.Server.Implementations.HttpServer;
 using Emby.Server.Implementations.HttpServer.Security;
 using Emby.Server.Implementations.IO;
 using Emby.Server.Implementations.Library;
@@ -97,6 +95,7 @@ using MediaBrowser.Model.Tasks;
 using MediaBrowser.Providers.Chapters;
 using MediaBrowser.Providers.Manager;
 using MediaBrowser.Providers.Plugins.TheTvdb;
+using MediaBrowser.Providers.Plugins.Tmdb;
 using MediaBrowser.Providers.Subtitles;
 using MediaBrowser.XbmcMetadata.Providers;
 using Microsoft.AspNetCore.Mvc;
@@ -127,8 +126,6 @@ namespace Emby.Server.Implementations
         private IMediaEncoder _mediaEncoder;
         private ISessionManager _sessionManager;
         private IHttpClientFactory _httpClientFactory;
-        private IWebSocketManager _webSocketManager;
-
         private string[] _urlPrefixes;
 
         /// <summary>
@@ -258,8 +255,8 @@ namespace Emby.Server.Implementations
             IServiceCollection serviceCollection)
         {
             _xmlSerializer = new MyXmlSerializer();
-            _jsonSerializer = new JsonSerializer();            
-            
+            _jsonSerializer = new JsonSerializer();
+
             ServiceCollection = serviceCollection;
 
             _networkManager = networkManager;
@@ -339,7 +336,7 @@ namespace Emby.Server.Implementations
         /// Gets the email address for use within a comment section of a user agent field.
         /// Presently used to provide contact information to MusicBrainz service.
         /// </summary>
-        public string ApplicationUserAgentAddress { get; } = "team@jellyfin.org";
+        public string ApplicationUserAgentAddress => "team@jellyfin.org";
 
         /// <summary>
         /// Gets the current application name.
@@ -403,7 +400,7 @@ namespace Emby.Server.Implementations
         /// <summary>
         /// Resolves this instance.
         /// </summary>
-        /// <typeparam name="T">The type</typeparam>
+        /// <typeparam name="T">The type.</typeparam>
         /// <returns>``0.</returns>
         public T Resolve<T>() => ServiceProvider.GetService<T>();
 
@@ -499,24 +496,11 @@ namespace Emby.Server.Implementations
                 HttpsPort = ServerConfiguration.DefaultHttpsPort;
             }
 
-            if (Plugins != null)
-            {
-                var pluginBuilder = new StringBuilder();
-
-                foreach (var plugin in Plugins)
-                {
-                    pluginBuilder.Append(plugin.Name)
-                        .Append(' ')
-                        .Append(plugin.Version)
-                        .AppendLine();
-                }
-
-                Logger.LogInformation("Plugins: {Plugins}", pluginBuilder.ToString());
-            }
-
             DiscoverTypes();
 
             RegisterServices();
+
+            RegisterPluginServices();
         }
 
         /// <summary>
@@ -537,6 +521,7 @@ namespace Emby.Server.Implementations
 
             ServiceCollection.AddSingleton(_fileSystemManager);
             ServiceCollection.AddSingleton<TvdbClientManager>();
+            ServiceCollection.AddSingleton<TmdbClientManager>();
 
             ServiceCollection.AddSingleton(_networkManager);
 
@@ -665,7 +650,6 @@ namespace Emby.Server.Implementations
             _mediaEncoder = Resolve<IMediaEncoder>();
             _sessionManager = Resolve<ISessionManager>();
             _httpClientFactory = Resolve<IHttpClientFactory>();
-            _webSocketManager = Resolve<IWebSocketManager>();
 
             ((AuthenticationRepository)Resolve<IAuthenticationRepository>()).Initialize();
 
@@ -781,12 +765,25 @@ namespace Emby.Server.Implementations
 
             ConfigurationManager.AddParts(GetExports<IConfigurationFactory>());
             _plugins = GetExports<IPlugin>()
-                        .Select(LoadPlugin)
                         .Where(i => i != null)
                         .ToArray();
 
+            if (Plugins != null)
+            {
+                var pluginBuilder = new StringBuilder();
+
+                foreach (var plugin in Plugins)
+                {
+                    pluginBuilder.Append(plugin.Name)
+                        .Append(' ')
+                        .Append(plugin.Version)
+                        .AppendLine();
+                }
+
+                Logger.LogInformation("Plugins: {Plugins}", pluginBuilder.ToString());
+            }
+
             _urlPrefixes = GetUrlPrefixes().ToArray();
-            _webSocketManager.Init(GetExports<IWebSocketListener>());
 
             Resolve<ILibraryManager>().AddParts(
                 GetExports<IResolverIgnoreRule>(),
@@ -815,21 +812,6 @@ namespace Emby.Server.Implementations
             Resolve<IIsoManager>().AddParts(GetExports<IIsoMounter>());
         }
 
-        private IPlugin LoadPlugin(IPlugin plugin)
-        {
-            try
-            {
-                plugin.RegisterServices(ServiceCollection);
-            }
-            catch (Exception ex)
-            {
-                Logger.LogError(ex, "Error loading plugin {PluginName}", plugin.GetType().FullName);
-                return null;
-            }
-
-            return plugin;
-        }
-
         /// <summary>
         /// Discovers the types.
         /// </summary>
@@ -840,6 +822,22 @@ namespace Emby.Server.Implementations
             _allConcreteTypes = GetTypes(GetComposablePartAssemblies()).ToArray();
         }
 
+        private void RegisterPluginServices()
+        {
+            foreach (var pluginServiceRegistrator in GetExportTypes<IPluginServiceRegistrator>())
+            {
+                try
+                {
+                    var instance = (IPluginServiceRegistrator)Activator.CreateInstance(pluginServiceRegistrator);
+                    instance.RegisterServices(ServiceCollection);
+                }
+                catch (Exception ex)
+                {
+                    Logger.LogError(ex, "Error registering plugin services from {Assembly}.", pluginServiceRegistrator.Assembly);
+                }
+            }
+        }
+
         private IEnumerable<Type> GetTypes(IEnumerable<Assembly> assemblies)
         {
             foreach (var ass in assemblies)
@@ -994,80 +992,60 @@ namespace Emby.Server.Implementations
 
         protected abstract void RestartInternal();
 
-        /// <summary>
-        /// Comparison function used in <see cref="GetPlugins" />.
-        /// </summary>
-        /// <param name="a">Item to compare.</param>
-        /// <param name="b">Item to compare with.</param>
-        /// <returns>Boolean result of the operation.</returns>
-        private static int VersionCompare(
-            (Version PluginVersion, string Name, string Path) a,
-            (Version PluginVersion, string Name, string Path) b)
+        /// <inheritdoc/>
+        public IEnumerable<LocalPlugin> GetLocalPlugins(string path, bool cleanup = true)
         {
-            int compare = string.Compare(a.Name, b.Name, true, CultureInfo.InvariantCulture);
-
-            if (compare == 0)
+            var minimumVersion = new Version(0, 0, 0, 1);
+            var versions = new List<LocalPlugin>();
+            if (!Directory.Exists(path))
             {
-                return a.PluginVersion.CompareTo(b.PluginVersion);
+                // Plugin path doesn't exist, don't try to enumerate subfolders.
+                return Enumerable.Empty<LocalPlugin>();
             }
 
-            return compare;
-        }
-
-        /// <summary>
-        /// Returns a list of plugins to install.
-        /// </summary>
-        /// <param name="path">Path to check.</param>
-        /// <param name="cleanup">True if an attempt should be made to delete old plugs.</param>
-        /// <returns>Enumerable list of dlls to load.</returns>
-        private IEnumerable<string> GetPlugins(string path, bool cleanup = true)
-        {
-            var dllList = new List<string>();
-            var versions = new List<(Version PluginVersion, string Name, string Path)>();
             var directories = Directory.EnumerateDirectories(path, "*.*", SearchOption.TopDirectoryOnly);
-            string metafile;
 
             foreach (var dir in directories)
             {
                 try
                 {
-                    metafile = Path.Combine(dir, "meta.json");
+                    var metafile = Path.Combine(dir, "meta.json");
                     if (File.Exists(metafile))
                     {
                         var manifest = _jsonSerializer.DeserializeFromFile<PluginManifest>(metafile);
 
                         if (!Version.TryParse(manifest.TargetAbi, out var targetAbi))
                         {
-                            targetAbi = new Version(0, 0, 0, 1);
+                            targetAbi = minimumVersion;
                         }
 
                         if (!Version.TryParse(manifest.Version, out var version))
                         {
-                            version = new Version(0, 0, 0, 1);
+                            version = minimumVersion;
                         }
 
                         if (ApplicationVersion >= targetAbi)
                         {
                             // Only load Plugins if the plugin is built for this version or below.
-                            versions.Add((version, manifest.Name, dir));
+                            versions.Add(new LocalPlugin(manifest.Guid, manifest.Name, version, dir));
                         }
                     }
                     else
                     {
                         // No metafile, so lets see if the folder is versioned.
-                        metafile = dir.Split(new[] { Path.DirectorySeparatorChar }, StringSplitOptions.RemoveEmptyEntries)[^1];
-                        
+                        metafile = dir.Split(Path.DirectorySeparatorChar, StringSplitOptions.RemoveEmptyEntries)[^1];
+
                         int versionIndex = dir.LastIndexOf('_');
-                        if (versionIndex != -1 && Version.TryParse(dir.Substring(versionIndex + 1), out Version ver))
+                        if (versionIndex != -1 && Version.TryParse(dir.Substring(versionIndex + 1), out Version parsedVersion))
                         {
                             // Versioned folder.
-                            versions.Add((ver, metafile, dir));
+                            versions.Add(new LocalPlugin(Guid.Empty, metafile, parsedVersion, dir));
                         }
                         else
                         {
-                            // Un-versioned folder - Add it under the path name and version 0.0.0.1.                        
-                            versions.Add((new Version(0, 0, 0, 1), metafile, dir));
-                        }   
+                            // Un-versioned folder - Add it under the path name and version 0.0.0.1.
+                            versions.Add(new LocalPlugin(Guid.Empty, metafile, minimumVersion, dir));
+                        }
                     }
                 }
                 catch
@@ -1077,14 +1055,14 @@ namespace Emby.Server.Implementations
             }
 
             string lastName = string.Empty;
-            versions.Sort(VersionCompare);
+            versions.Sort(LocalPlugin.Compare);
             // Traverse backwards through the list.
             // The first item will be the latest version.
             for (int x = versions.Count - 1; x >= 0; x--)
             {
                 if (!string.Equals(lastName, versions[x].Name, StringComparison.OrdinalIgnoreCase))
                 {
-                    dllList.AddRange(Directory.EnumerateFiles(versions[x].Path, "*.dll", SearchOption.AllDirectories));
+                    versions[x].DllFiles.AddRange(Directory.EnumerateFiles(versions[x].Path, "*.dll", SearchOption.AllDirectories));
                     lastName = versions[x].Name;
                     continue;
                 }
@@ -1092,6 +1070,7 @@ namespace Emby.Server.Implementations
                 if (!string.IsNullOrEmpty(lastName) && cleanup)
                 {
                     // Attempt a cleanup of old folders.
+                    versions.RemoveAt(x);
                     try
                     {
                         Logger.LogDebug("Deleting {Path}", versions[x].Path);
@@ -1104,7 +1083,7 @@ namespace Emby.Server.Implementations
                 }
             }
 
-            return dllList;
+            return versions;
         }
 
         /// <summary>
@@ -1115,21 +1094,24 @@ namespace Emby.Server.Implementations
         {
             if (Directory.Exists(ApplicationPaths.PluginsPath))
             {
-                foreach (var file in GetPlugins(ApplicationPaths.PluginsPath))
+                foreach (var plugin in GetLocalPlugins(ApplicationPaths.PluginsPath))
                 {
-                    Assembly plugAss;
-                    try
+                    foreach (var file in plugin.DllFiles)
                     {
-                        plugAss = Assembly.LoadFrom(file);
-                    }
-                    catch (FileLoadException ex)
-                    {
-                        Logger.LogError(ex, "Failed to load assembly {Path}", file);
-                        continue;
-                    }
+                        Assembly plugAss;
+                        try
+                        {
+                            plugAss = Assembly.LoadFrom(file);
+                        }
+                        catch (FileLoadException ex)
+                        {
+                            Logger.LogError(ex, "Failed to load assembly {Path}", file);
+                            continue;
+                        }
 
-                    Logger.LogInformation("Loaded assembly {Assembly} from {Path}", plugAss.FullName, file);
-                    yield return plugAss;
+                        Logger.LogInformation("Loaded assembly {Assembly} from {Path}", plugAss.FullName, file);
+                        yield return plugAss;
+                    }
                 }
             }
 
@@ -1396,7 +1378,7 @@ namespace Emby.Server.Implementations
                 using var response = await _httpClientFactory.CreateClient(NamedClient.Default)
                     .SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken).ConfigureAwait(false);
 
-                await using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
+                await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
                 var result = await System.Text.Json.JsonSerializer.DeserializeAsync<string>(stream, JsonDefaults.GetOptions(), cancellationToken).ConfigureAwait(false);
                 var valid = string.Equals(Name, result, StringComparison.OrdinalIgnoreCase);
 

Emby.Server.Implementations/Browser/BrowserLauncher.cs

@@ -1,51 +0,0 @@
-using System;
-using MediaBrowser.Controller;
-using MediaBrowser.Controller.Configuration;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
-
-namespace Emby.Server.Implementations.Browser
-{
-    /// <summary>
-    /// Assists in opening application URLs in an external browser.
-    /// </summary>
-    public static class BrowserLauncher
-    {
-        /// <summary>
-        /// Opens the home page of the web client.
-        /// </summary>
-        /// <param name="appHost">The app host.</param>
-        public static void OpenWebApp(IServerApplicationHost appHost)
-        {
-            TryOpenUrl(appHost, "/web/index.html");
-        }
-
-        /// <summary>
-        /// Opens the swagger API page.
-        /// </summary>
-        /// <param name="appHost">The app host.</param>
-        public static void OpenSwaggerPage(IServerApplicationHost appHost)
-        {
-            TryOpenUrl(appHost, "/api-docs/swagger");
-        }
-
-        /// <summary>
-        /// Opens the specified URL in an external browser window. Any exceptions will be logged, but ignored.
-        /// </summary>
-        /// <param name="appHost">The application host.</param>
-        /// <param name="relativeUrl">The URL to open, relative to the server base URL.</param>
-        private static void TryOpenUrl(IServerApplicationHost appHost, string relativeUrl)
-        {
-            try
-            {
-                string baseUrl = appHost.GetLocalApiUrl("localhost");
-                appHost.LaunchUrl(baseUrl + relativeUrl);
-            }
-            catch (Exception ex)
-            {
-                var logger = appHost.Resolve<ILogger<IServerApplicationHost>>();
-                logger?.LogError(ex, "Failed to open browser window with URL {URL}", relativeUrl);
-            }
-        }
-    }
-}

Emby.Server.Implementations/Channels/ChannelManager.cs

@@ -250,21 +250,16 @@ namespace Emby.Server.Implementations.Channels
             var all = channels;
             var totalCount = all.Count;
 
-            if (query.StartIndex.HasValue)
+            if (query.StartIndex.HasValue || query.Limit.HasValue)
             {
-                all = all.Skip(query.StartIndex.Value).ToList();
+                int startIndex = query.StartIndex ?? 0;
+                int count = query.Limit == null ? totalCount - startIndex : Math.Min(query.Limit.Value, totalCount - startIndex);
+                all = all.GetRange(startIndex, count);
             }
 
-            if (query.Limit.HasValue)
-            {
-                all = all.Take(query.Limit.Value).ToList();
-            }
-
-            var returnItems = all.ToArray();
-
             if (query.RefreshLatestChannelItems)
             {
-                foreach (var item in returnItems)
+                foreach (var item in all)
                 {
                     RefreshLatestChannelItems(GetChannelProvider(item), CancellationToken.None).GetAwaiter().GetResult();
                 }
@@ -272,7 +267,7 @@ namespace Emby.Server.Implementations.Channels
 
             return new QueryResult<Channel>
             {
-                Items = returnItems,
+                Items = all,
                 TotalRecordCount = totalCount
             };
         }
@@ -543,7 +538,7 @@ namespace Emby.Server.Implementations.Channels
             return _libraryManager.GetItemIds(
                 new InternalItemsQuery
                 {
-                    IncludeItemTypes = new[] { typeof(Channel).Name },
+                    IncludeItemTypes = new[] { nameof(Channel) },
                     OrderBy = new[] { (ItemSortBy.SortName, SortOrder.Ascending) }
                 }).Select(i => GetChannelFeatures(i.ToString("N", CultureInfo.InvariantCulture))).ToArray();
         }

Emby.Server.Implementations/Channels/ChannelPostScanTask.cs

@@ -51,7 +51,7 @@ namespace Emby.Server.Implementations.Channels
 
             var uninstalledChannels = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { typeof(Channel).Name },
+                IncludeItemTypes = new[] { nameof(Channel) },
                 ExcludeItemIds = installedChannelIds.ToArray()
             });
 

Emby.Server.Implementations/Cryptography/CryptographyProvider.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Security.Cryptography;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Model.Cryptography;
 using static MediaBrowser.Common.Cryptography.Constants;
 
@@ -80,7 +81,7 @@ namespace Emby.Server.Implementations.Cryptography
                 throw new CryptographicException($"Requested hash method is not supported: {hashMethod}");
             }
 
-            using var h = HashAlgorithm.Create(hashMethod);
+            using var h = HashAlgorithm.Create(hashMethod) ?? throw new ResourceNotFoundException($"Unknown hash method: {hashMethod}.");
             if (salt.Length == 0)
             {
                 return h.ComputeHash(bytes);

Emby.Server.Implementations/Data/BaseSqliteRepository.cs

@@ -157,7 +157,8 @@ namespace Emby.Server.Implementations.Data
 
         protected bool TableExists(ManagedConnection connection, string name)
         {
-            return connection.RunInTransaction(db =>
+            return connection.RunInTransaction(
+            db =>
             {
                 using (var statement = PrepareStatement(db, "select DISTINCT tbl_name from sqlite_master"))
                 {

Emby.Server.Implementations/Data/SqliteExtensions.cs

@@ -107,20 +107,6 @@ namespace Emby.Server.Implementations.Data
             return null;
         }
 
-        public static void Attach(SQLiteDatabaseConnection db, string path, string alias)
-        {
-            var commandText = string.Format(
-                CultureInfo.InvariantCulture,
-                "attach @path as {0};",
-                alias);
-
-            using (var statement = db.PrepareStatement(commandText))
-            {
-                statement.TryBind("@path", path);
-                statement.MoveNext();
-            }
-        }
-
         public static bool IsDBNull(this IReadOnlyList<IResultSetValue> result, int index)
         {
             return result[index].SQLiteType == SQLiteType.Null;

Emby.Server.Implementations/Data/SqliteItemRepository.cs

@@ -219,7 +219,8 @@ namespace Emby.Server.Implementations.Data
             {
                 connection.RunQueries(queries);
 
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var existingColumnNames = GetColumnNames(db, "AncestorIds");
                     AddColumn(db, "AncestorIds", "AncestorIdText", "Text", existingColumnNames);
@@ -495,7 +496,8 @@ namespace Emby.Server.Implementations.Data
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     using (var saveImagesStatement = base.PrepareStatement(db, "Update TypedBaseItems set Images=@Images where guid=@Id"))
                     {
@@ -546,7 +548,8 @@ namespace Emby.Server.Implementations.Data
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     SaveItemsInTranscation(db, tuples);
                 }, TransactionMode);
@@ -1004,7 +1007,7 @@ namespace Emby.Server.Implementations.Data
                 return;
             }
 
-            var parts = value.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+            var parts = value.Split('|', StringSplitOptions.RemoveEmptyEntries);
 
             foreach (var part in parts)
             {
@@ -1054,7 +1057,7 @@ namespace Emby.Server.Implementations.Data
                 return;
             }
 
-            var parts = value.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+            var parts = value.Split('|' , StringSplitOptions.RemoveEmptyEntries);
             var list = new List<ItemImageInfo>();
             foreach (var part in parts)
             {
@@ -1093,7 +1096,7 @@ namespace Emby.Server.Implementations.Data
 
         public ItemImageInfo ItemImageInfoFromValueString(string value)
         {
-            var parts = value.Split(new[] { '*' }, StringSplitOptions.None);
+            var parts = value.Split('*', StringSplitOptions.None);
 
             if (parts.Length < 3)
             {
@@ -1529,7 +1532,7 @@ namespace Emby.Server.Implementations.Data
             {
                 if (!reader.IsDBNull(index))
                 {
-                    item.Genres = reader.GetString(index).Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+                    item.Genres = reader.GetString(index).Split('|', StringSplitOptions.RemoveEmptyEntries);
                 }
 
                 index++;
@@ -1590,7 +1593,7 @@ namespace Emby.Server.Implementations.Data
                 {
                     IEnumerable<MetadataField> GetLockedFields(string s)
                     {
-                        foreach (var i in s.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries))
+                        foreach (var i in s.Split('|', StringSplitOptions.RemoveEmptyEntries))
                         {
                             if (Enum.TryParse(i, true, out MetadataField parsedValue))
                             {
@@ -1609,7 +1612,7 @@ namespace Emby.Server.Implementations.Data
             {
                 if (!reader.IsDBNull(index))
                 {
-                    item.Studios = reader.GetString(index).Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+                    item.Studios = reader.GetString(index).Split('|', StringSplitOptions.RemoveEmptyEntries);
                 }
 
                 index++;
@@ -1619,7 +1622,7 @@ namespace Emby.Server.Implementations.Data
             {
                 if (!reader.IsDBNull(index))
                 {
-                    item.Tags = reader.GetString(index).Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+                    item.Tags = reader.GetString(index).Split('|', StringSplitOptions.RemoveEmptyEntries);
                 }
 
                 index++;
@@ -1633,7 +1636,7 @@ namespace Emby.Server.Implementations.Data
                     {
                         IEnumerable<TrailerType> GetTrailerTypes(string s)
                         {
-                            foreach (var i in s.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries))
+                            foreach (var i in s.Split('|', StringSplitOptions.RemoveEmptyEntries))
                             {
                                 if (Enum.TryParse(i, true, out TrailerType parsedValue))
                                 {
@@ -1808,7 +1811,7 @@ namespace Emby.Server.Implementations.Data
             {
                 if (!reader.IsDBNull(index))
                 {
-                    item.ProductionLocations = reader.GetString(index).Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries).ToArray();
+                    item.ProductionLocations = reader.GetString(index).Split('|', StringSplitOptions.RemoveEmptyEntries).ToArray();
                 }
 
                 index++;
@@ -1845,14 +1848,14 @@ namespace Emby.Server.Implementations.Data
             {
                 if (item is IHasArtist hasArtists && !reader.IsDBNull(index))
                 {
-                    hasArtists.Artists = reader.GetString(index).Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+                    hasArtists.Artists = reader.GetString(index).Split('|', StringSplitOptions.RemoveEmptyEntries);
                 }
 
                 index++;
 
                 if (item is IHasAlbumArtist hasAlbumArtists && !reader.IsDBNull(index))
                 {
-                    hasAlbumArtists.AlbumArtists = reader.GetString(index).Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+                    hasAlbumArtists.AlbumArtists = reader.GetString(index).Split('|', StringSplitOptions.RemoveEmptyEntries);
                 }
 
                 index++;
@@ -2032,7 +2035,8 @@ namespace Emby.Server.Implementations.Data
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     // First delete chapters
                     db.Execute("delete from " + ChaptersTableName + " where ItemId=@ItemId", idBlob);
@@ -2263,7 +2267,6 @@ namespace Emby.Server.Implementations.Data
             return query.IncludeItemTypes.Contains("Trailer", StringComparer.OrdinalIgnoreCase);
         }
 
-
         private static readonly HashSet<string> _artistExcludeParentTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
         {
             "Series",
@@ -2400,11 +2403,11 @@ namespace Emby.Server.Implementations.Data
 
                 if (string.IsNullOrEmpty(item.OfficialRating))
                 {
-                    builder.Append("((OfficialRating is null) * 10)");
+                    builder.Append("(OfficialRating is null * 10)");
                 }
                 else
                 {
-                    builder.Append("((OfficialRating=@ItemOfficialRating) * 10)");
+                    builder.Append("(OfficialRating=@ItemOfficialRating * 10)");
                 }
 
                 if (item.ProductionYear.HasValue)
@@ -2413,8 +2416,26 @@ namespace Emby.Server.Implementations.Data
                     builder.Append("+(Select Case When Abs(COALESCE(ProductionYear, 0) - @ItemProductionYear) < 5 Then 5 Else 0 End )");
                 }
 
-                //// genres, tags
-                builder.Append("+ ((Select count(CleanValue) from ItemValues where ItemId=Guid and CleanValue in (select CleanValue from itemvalues where ItemId=@SimilarItemId)) * 10)");
+                // genres, tags, studios, person, year?
+                builder.Append("+ (Select count(1) * 10 from ItemValues where ItemId=Guid and CleanValue in (select CleanValue from itemvalues where ItemId=@SimilarItemId))");
+
+                if (item is MusicArtist)
+                {
+                    // Match albums where the artist is AlbumArtist against other albums.
+                    // It is assumed that similar albums => similar artists.
+                    builder.Append(
+                        @"+ (WITH artistValues AS (
+	                            SELECT DISTINCT albumValues.CleanValue
+	                            FROM ItemValues albumValues
+	                            INNER JOIN ItemValues artistAlbums ON albumValues.ItemId = artistAlbums.ItemId
+	                            INNER JOIN TypedBaseItems artistItem ON artistAlbums.CleanValue = artistItem.CleanName AND artistAlbums.TYPE = 1 AND artistItem.Guid = @SimilarItemId
+                            ), similarArtist AS (
+	                            SELECT albumValues.ItemId
+	                            FROM ItemValues albumValues
+	                            INNER JOIN ItemValues artistAlbums ON albumValues.ItemId = artistAlbums.ItemId
+	                            INNER JOIN TypedBaseItems artistItem ON artistAlbums.CleanValue = artistItem.CleanName AND artistAlbums.TYPE = 1 AND artistItem.Guid = A.Guid
+                            ) SELECT COUNT(DISTINCT(CleanValue)) * 10 FROM ItemValues WHERE ItemId IN (SELECT ItemId FROM similarArtist) AND CleanValue IN (SELECT CleanValue FROM artistValues))");
+                }
 
                 builder.Append(") as SimilarityScore");
 
@@ -2922,7 +2943,8 @@ namespace Emby.Server.Implementations.Data
             var result = new QueryResult<BaseItem>();
             using (var connection = GetConnection(true))
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var statements = PrepareAll(db, statementTexts);
 
@@ -3291,7 +3313,6 @@ namespace Emby.Server.Implementations.Data
                 }
             }
 
-
             var isReturningZeroItems = query.Limit.HasValue && query.Limit <= 0;
 
             var statementTexts = new List<string>();
@@ -3326,7 +3347,8 @@ namespace Emby.Server.Implementations.Data
             var result = new QueryResult<Guid>();
             using (var connection = GetConnection(true))
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var statements = PrepareAll(db, statementTexts);
 
@@ -3910,7 +3932,7 @@ namespace Emby.Server.Implementations.Data
                 if (query.IsPlayed.HasValue)
                 {
                     // We should probably figure this out for all folders, but for right now, this is the only place where we need it
-                    if (query.IncludeItemTypes.Length == 1 && string.Equals(query.IncludeItemTypes[0], typeof(Series).Name, StringComparison.OrdinalIgnoreCase))
+                    if (query.IncludeItemTypes.Length == 1 && string.Equals(query.IncludeItemTypes[0], nameof(Series), StringComparison.OrdinalIgnoreCase))
                     {
                         if (query.IsPlayed.Value)
                         {
@@ -4751,29 +4773,29 @@ namespace Emby.Server.Implementations.Data
         {
             var list = new List<string>();
 
-            if (IsTypeInQuery(typeof(Person).Name, query))
+            if (IsTypeInQuery(nameof(Person), query))
             {
-                list.Add(typeof(Person).Name);
+                list.Add(nameof(Person));
             }
 
-            if (IsTypeInQuery(typeof(Genre).Name, query))
+            if (IsTypeInQuery(nameof(Genre), query))
             {
-                list.Add(typeof(Genre).Name);
+                list.Add(nameof(Genre));
             }
 
-            if (IsTypeInQuery(typeof(MusicGenre).Name, query))
+            if (IsTypeInQuery(nameof(MusicGenre), query))
             {
-                list.Add(typeof(MusicGenre).Name);
+                list.Add(nameof(MusicGenre));
             }
 
-            if (IsTypeInQuery(typeof(MusicArtist).Name, query))
+            if (IsTypeInQuery(nameof(MusicArtist), query))
             {
-                list.Add(typeof(MusicArtist).Name);
+                list.Add(nameof(MusicArtist));
             }
 
-            if (IsTypeInQuery(typeof(Studio).Name, query))
+            if (IsTypeInQuery(nameof(Studio), query))
             {
-                list.Add(typeof(Studio).Name);
+                list.Add(nameof(Studio));
             }
 
             return list;
@@ -4828,12 +4850,12 @@ namespace Emby.Server.Implementations.Data
 
             var types = new[]
             {
-                typeof(Episode).Name,
-                typeof(Video).Name,
-                typeof(Movie).Name,
-                typeof(MusicVideo).Name,
-                typeof(Series).Name,
-                typeof(Season).Name
+                nameof(Episode),
+                nameof(Video),
+                nameof(Movie),
+                nameof(MusicVideo),
+                nameof(Series),
+                nameof(Season)
             };
 
             if (types.Any(i => query.IncludeItemTypes.Contains(i, StringComparer.OrdinalIgnoreCase)))
@@ -4901,7 +4923,8 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     connection.ExecuteAll(sql);
                 }, TransactionMode);
@@ -4952,7 +4975,8 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var idBlob = id.ToByteArray();
 
@@ -4996,26 +5020,33 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             CheckDisposed();
 
-            var commandText = "select Distinct Name from People";
+            var commandText = new StringBuilder("select Distinct p.Name from People p");
+
+            if (query.User != null && query.IsFavorite.HasValue)
+            {
+                commandText.Append(" LEFT JOIN TypedBaseItems tbi ON tbi.Name=p.Name AND tbi.Type='");
+                commandText.Append(typeof(Person).FullName);
+                commandText.Append("' LEFT JOIN UserDatas ON tbi.UserDataKey=key AND userId=@UserId");
+            }
 
             var whereClauses = GetPeopleWhereClauses(query, null);
 
             if (whereClauses.Count != 0)
             {
-                commandText += "  where " + string.Join(" AND ", whereClauses);
+                commandText.Append(" where ").Append(string.Join(" AND ", whereClauses));
             }
 
-            commandText += " order by ListOrder";
+            commandText.Append(" order by ListOrder");
 
             if (query.Limit > 0)
             {
-                commandText += " LIMIT " + query.Limit;
+                commandText.Append(" LIMIT ").Append(query.Limit);
             }
 
             using (var connection = GetConnection(true))
             {
                 var list = new List<string>();
-                using (var statement = PrepareStatement(connection, commandText))
+                using (var statement = PrepareStatement(connection, commandText.ToString()))
                 {
                     // Run this again to bind the params
                     GetPeopleWhereClauses(query, statement);
@@ -5039,7 +5070,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             CheckDisposed();
 
-            var commandText = "select ItemId, Name, Role, PersonType, SortOrder from People";
+            var commandText = "select ItemId, Name, Role, PersonType, SortOrder from People p";
 
             var whereClauses = GetPeopleWhereClauses(query, null);
 
@@ -5081,19 +5112,13 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             if (!query.ItemId.Equals(Guid.Empty))
             {
                 whereClauses.Add("ItemId=@ItemId");
-                if (statement != null)
-                {
-                    statement.TryBind("@ItemId", query.ItemId.ToByteArray());
-                }
+                statement?.TryBind("@ItemId", query.ItemId.ToByteArray());
             }
 
             if (!query.AppearsInItemId.Equals(Guid.Empty))
             {
-                whereClauses.Add("Name in (Select Name from People where ItemId=@AppearsInItemId)");
-                if (statement != null)
-                {
-                    statement.TryBind("@AppearsInItemId", query.AppearsInItemId.ToByteArray());
-                }
+                whereClauses.Add("p.Name in (Select Name from People where ItemId=@AppearsInItemId)");
+                statement?.TryBind("@AppearsInItemId", query.AppearsInItemId.ToByteArray());
             }
 
             var queryPersonTypes = query.PersonTypes.Where(IsValidPersonType).ToList();
@@ -5101,10 +5126,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             if (queryPersonTypes.Count == 1)
             {
                 whereClauses.Add("PersonType=@PersonType");
-                if (statement != null)
-                {
-                    statement.TryBind("@PersonType", queryPersonTypes[0]);
-                }
+                statement?.TryBind("@PersonType", queryPersonTypes[0]);
             }
             else if (queryPersonTypes.Count > 1)
             {
@@ -5118,10 +5140,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             if (queryExcludePersonTypes.Count == 1)
             {
                 whereClauses.Add("PersonType<>@PersonType");
-                if (statement != null)
-                {
-                    statement.TryBind("@PersonType", queryExcludePersonTypes[0]);
-                }
+                statement?.TryBind("@PersonType", queryExcludePersonTypes[0]);
             }
             else if (queryExcludePersonTypes.Count > 1)
             {
@@ -5133,19 +5152,24 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             if (query.MaxListOrder.HasValue)
             {
                 whereClauses.Add("ListOrder<=@MaxListOrder");
-                if (statement != null)
-                {
-                    statement.TryBind("@MaxListOrder", query.MaxListOrder.Value);
-                }
+                statement?.TryBind("@MaxListOrder", query.MaxListOrder.Value);
             }
 
             if (!string.IsNullOrWhiteSpace(query.NameContains))
             {
-                whereClauses.Add("Name like @NameContains");
-                if (statement != null)
-                {
-                    statement.TryBind("@NameContains", "%" + query.NameContains + "%");
-                }
+                whereClauses.Add("p.Name like @NameContains");
+                statement?.TryBind("@NameContains", "%" + query.NameContains + "%");
+            }
+
+            if (query.IsFavorite.HasValue)
+            {
+                whereClauses.Add("isFavorite=@IsFavorite");
+                statement?.TryBind("@IsFavorite", query.IsFavorite.Value);
+            }
+
+            if (query.User != null)
+            {
+                statement?.TryBind("@UserId", query.User.InternalId);
             }
 
             return whereClauses;
@@ -5359,7 +5383,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
                 itemCountColumns = new Dictionary<string, string>()
                 {
-                    { "itemTypes", "(" + itemCountColumnQuery + ") as itemTypes"}
+                    { "itemTypes", "(" + itemCountColumnQuery + ") as itemTypes" }
                 };
             }
 
@@ -5414,6 +5438,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
                 NameStartsWithOrGreater = query.NameStartsWithOrGreater,
                 Tags = query.Tags,
                 OfficialRatings = query.OfficialRatings,
+                StudioIds = query.StudioIds,
                 GenreIds = query.GenreIds,
                 Genres = query.Genres,
                 Years = query.Years,
@@ -5586,7 +5611,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
                 return counts;
             }
 
-            var allTypes = typeString.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries)
+            var allTypes = typeString.Split('|', StringSplitOptions.RemoveEmptyEntries)
                 .ToLookup(x => x);
 
             foreach (var type in allTypes)
@@ -5746,7 +5771,8 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var itemIdBlob = itemId.ToByteArray();
 
@@ -5900,7 +5926,8 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var itemIdBlob = id.ToByteArray();
 
@@ -6006,7 +6033,6 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             }
         }
 
-
         /// <summary>
         /// Gets the chapter.
         /// </summary>
@@ -6235,7 +6261,8 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     var itemIdBlob = id.ToByteArray();
 

Emby.Server.Implementations/Data/SqliteUserDataRepository.cs

@@ -44,7 +44,8 @@ namespace Emby.Server.Implementations.Data
 
                 var users = userDatasTableExists ? null : userManager.Users;
 
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     db.ExecuteAll(string.Join(";", new[] {
 
@@ -178,7 +179,8 @@ namespace Emby.Server.Implementations.Data
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     SaveUserData(db, internalUserId, key, userData);
                 }, TransactionMode);
@@ -246,7 +248,8 @@ namespace Emby.Server.Implementations.Data
 
             using (var connection = GetConnection())
             {
-                connection.RunInTransaction(db =>
+                connection.RunInTransaction(
+                db =>
                 {
                     foreach (var userItemData in userDataList)
                     {