add plex network metadata (#2085)

* initial plumbing

* scan for plex networks

* save network contents to db as tags

* eliminate network tag id churn

* add network and show_network to search index

* update last networks scan

* show networks on tv show page

* update changelog

CHANGELOG.md

@@ -33,6 +33,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - `Active` - default value, channel streams as normal and has normal visibility
   - `Hidden` - channel streams as normal and is hidden from M3U/XMLTV/HDHR
   - `Inactive` - channel cannot stream (will 404) and is hidden from M3U/XMLTV/HDHR
+- Synchronize Plex "network" metadata for Plex show libraries
+  - Shows will have new `network` search field
+  - Episodes will have new `show_network` search field
 
 ### Fixed
 - Fix QSV acceleration in docker with older Intel devices

ErsatzTV.Application/Plex/Commands/CallPlexNetworkScannerHandler.cs

@@ -0,0 +1,83 @@
+using System.Globalization;
+using System.Threading.Channels;
+using ErsatzTV.Application.Libraries;
+using ErsatzTV.Core;
+using ErsatzTV.Core.Errors;
+using ErsatzTV.Core.Interfaces.Repositories;
+using ErsatzTV.FFmpeg.Runtime;
+using ErsatzTV.Infrastructure.Data;
+using ErsatzTV.Infrastructure.Extensions;
+using Microsoft.EntityFrameworkCore;
+
+namespace ErsatzTV.Application.Plex;
+
+public class CallPlexNetworkScannerHandler : CallLibraryScannerHandler<SynchronizePlexNetworks>,
+    IRequestHandler<SynchronizePlexNetworks, Either<BaseError, Unit>>
+{
+    public CallPlexNetworkScannerHandler(
+        IDbContextFactory<TvContext> dbContextFactory,
+        IConfigElementRepository configElementRepository,
+        ChannelWriter<ISearchIndexBackgroundServiceRequest> channel,
+        IMediator mediator,
+        IRuntimeInfo runtimeInfo) : base(dbContextFactory, configElementRepository, channel, mediator, runtimeInfo)
+    {
+    }
+
+    public async Task<Either<BaseError, Unit>>
+        Handle(SynchronizePlexNetworks request, CancellationToken cancellationToken)
+    {
+        Validation<BaseError, string> validation = await Validate(request);
+        return await validation.Match(
+            scanner => PerformScan(scanner, request, cancellationToken),
+            error =>
+            {
+                foreach (ScanIsNotRequired scanIsNotRequired in error.OfType<ScanIsNotRequired>())
+                {
+                    return Task.FromResult<Either<BaseError, Unit>>(scanIsNotRequired);
+                }
+
+                return Task.FromResult<Either<BaseError, Unit>>(error.Join());
+            });
+    }
+
+    protected override async Task<DateTimeOffset> GetLastScan(TvContext dbContext, SynchronizePlexNetworks request)
+    {
+        DateTime minDateTime = await dbContext.PlexLibraries
+            .SelectOneAsync(l => l.Id, l => l.Id == request.PlexLibraryId)
+            .Match(l => l.LastNetworksScan ?? SystemTime.MinValueUtc, () => SystemTime.MaxValueUtc);
+
+        return new DateTimeOffset(minDateTime, TimeSpan.Zero);
+    }
+
+    protected override bool ScanIsRequired(
+        DateTimeOffset lastScan,
+        int libraryRefreshInterval,
+        SynchronizePlexNetworks request)
+    {
+        if (lastScan == SystemTime.MaxValueUtc)
+        {
+            return false;
+        }
+
+        DateTimeOffset nextScan = lastScan + TimeSpan.FromHours(libraryRefreshInterval);
+        return request.ForceScan || libraryRefreshInterval > 0 && nextScan < DateTimeOffset.Now;
+    }
+
+    private async Task<Either<BaseError, Unit>> PerformScan(
+        string scanner,
+        SynchronizePlexNetworks request,
+        CancellationToken cancellationToken)
+    {
+        var arguments = new List<string>
+        {
+            "scan-plex-networks", request.PlexLibraryId.ToString(CultureInfo.InvariantCulture)
+        };
+
+        if (request.ForceScan)
+        {
+            arguments.Add("--force");
+        }
+
+        return await base.PerformScan(scanner, arguments, cancellationToken).MapT(_ => Unit.Default);
+    }
+}

ErsatzTV.Application/Plex/Commands/SynchronizePlexNetworks.cs

@@ -0,0 +1,6 @@
+using ErsatzTV.Core;
+
+namespace ErsatzTV.Application.Plex;
+
+public record SynchronizePlexNetworks(int PlexLibraryId, bool ForceScan) : IRequest<Either<BaseError, Unit>>,
+    IScannerBackgroundServiceRequest;

ErsatzTV.Application/Television/Mapper.cs

@@ -22,21 +22,21 @@ internal static class Mapper
             show.ShowMetadata.HeadOrNone().Map(m => m.Plot ?? string.Empty).IfNone(string.Empty),
             show.ShowMetadata.HeadOrNone().Map(m => GetPoster(m, maybeJellyfin, maybeEmby)).IfNone(string.Empty),
             show.ShowMetadata.HeadOrNone().Map(m => GetFanArt(m, maybeJellyfin, maybeEmby)).IfNone(string.Empty),
-            show.ShowMetadata.HeadOrNone().Map(m => m.Genres.Map(g => g.Name).ToList()).IfNone(new List<string>()),
-            show.ShowMetadata.HeadOrNone().Map(m => m.Tags.Map(g => g.Name).ToList()).IfNone(new List<string>()),
-            show.ShowMetadata.HeadOrNone().Map(m => m.Studios.Map(s => s.Name).ToList())
-                .IfNone(new List<string>()),
+            show.ShowMetadata.HeadOrNone().Map(m => m.Genres.Map(g => g.Name).ToList()).IfNone([]),
+            show.ShowMetadata.HeadOrNone().Map(m => m.Tags.Where(t => string.IsNullOrWhiteSpace(t.ExternalTypeId)).Map(g => g.Name).ToList()).IfNone([]),
+            show.ShowMetadata.HeadOrNone().Map(m => m.Studios.Map(s => s.Name).ToList()).IfNone([]),
+            show.ShowMetadata.HeadOrNone().Map(m => m.Tags.Where(t => t.ExternalTypeId == Tag.PlexNetworkTypeId).Map(g => g.Name).ToList()).IfNone([]),
             show.ShowMetadata.HeadOrNone()
                 .Map(
                     m => (m.ContentRating ?? string.Empty).Split("/").Map(s => s.Trim())
-                        .Where(x => !string.IsNullOrWhiteSpace(x)).ToList()).IfNone(new List<string>()),
+                        .Where(x => !string.IsNullOrWhiteSpace(x)).ToList()).IfNone([]),
             LanguagesForShow(languages),
             show.ShowMetadata.HeadOrNone()
                 .Map(
                     m => m.Actors.OrderBy(a => a.Order).ThenBy(a => a.Id)
                         .Map(a => MediaCards.Mapper.ProjectToViewModel(a, maybeJellyfin, maybeEmby))
                         .ToList())
-                .IfNone(new List<ActorCardViewModel>()));
+                .IfNone([]));
 
     internal static TelevisionSeasonViewModel ProjectToViewModel(
         Season season,

ErsatzTV.Application/Television/TelevisionShowViewModel.cs

@@ -13,6 +13,7 @@ public record TelevisionShowViewModel(
     List<string> Genres,
     List<string> Tags,
     List<string> Studios,
+    List<string> Networks,
     List<string> ContentRatings,
     List<CultureInfo> Languages,
     List<ActorCardViewModel> Actors);

ErsatzTV.Core.Tests/Fakes/FakeTelevisionRepository.cs

@@ -21,6 +21,7 @@ public class FakeTelevisionRepository : ITelevisionRepository
     public Task<List<EpisodeMetadata>> GetEpisodesForCards(List<int> ids) => throw new NotSupportedException();
 
     public Task<List<Episode>> GetShowItems(int showId) => throw new NotSupportedException();
+    public Task<List<int>> GetEpisodeIdsForShow(int showId) => throw new NotSupportedException();
 
     public Task<List<Season>> GetAllSeasons() => throw new NotSupportedException();
 

ErsatzTV.Core/Domain/Collection/PlexTag.cs

@@ -0,0 +1,9 @@
+namespace ErsatzTV.Core.Domain;
+
+public class PlexTag
+{
+    public int Id { get; set; }
+    public string Filter { get; set; }
+    public string Tag { get; set; }
+    public int TagType { get; set; }
+}

ErsatzTV.Core/Domain/Library/PlexLibrary.cs

@@ -4,4 +4,5 @@ public class PlexLibrary : Library
 {
     public string Key { get; set; }
     public bool ShouldSyncItems { get; set; }
+    public DateTime? LastNetworksScan { get; set; }
 }

ErsatzTV.Core/Domain/Metadata/Tag.cs

@@ -2,7 +2,10 @@
 
 public class Tag
 {
+    public static readonly string PlexNetworkTypeId = "319";
+
     public int Id { get; set; }
     public string Name { get; set; }
     public string ExternalCollectionId { get; set; }
+    public string ExternalTypeId { get; set; }
 }

ErsatzTV.Core/Interfaces/Plex/IPlexNetworkScanner.cs

@@ -0,0 +1,13 @@
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Plex;
+
+namespace ErsatzTV.Core.Interfaces.Plex;
+
+public interface IPlexNetworkScanner
+{
+    Task<Either<BaseError, Unit>> ScanNetworks(
+        PlexLibrary library,
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        CancellationToken cancellationToken);
+}

ErsatzTV.Core/Interfaces/Plex/IPlexServerApiClient.cs

@@ -76,4 +76,16 @@ public interface IPlexServerApiClient
         PlexServerAuthToken token,
         string key,
         CancellationToken cancellationToken);
+
+    IAsyncEnumerable<Tuple<PlexTag, int>> GetAllTags(
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        int tagType,
+        CancellationToken cancellationToken);
+
+    IAsyncEnumerable<Tuple<PlexShow, int>> GetTagShowContents(
+        PlexLibrary library,
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        PlexTag tag);
 }

ErsatzTV.Core/Interfaces/Repositories/IPlexTelevisionRepository.cs

@@ -6,4 +6,9 @@ namespace ErsatzTV.Core.Interfaces.Repositories;
 public interface IPlexTelevisionRepository : IMediaServerTelevisionRepository<PlexLibrary, PlexShow, PlexSeason,
     PlexEpisode, PlexItemEtag>
 {
+    Task<List<int>> RemoveAllTags(PlexLibrary library, PlexTag tag, System.Collections.Generic.HashSet<int> keep);
+    Task<PlexShowAddTagResult> AddTag(PlexShow show, PlexTag tag);
+    Task UpdateLastNetworksScan(PlexLibrary library);
 }
+
+public record PlexShowAddTagResult(Option<int> Existing, Option<int> Added);

ErsatzTV.Core/Interfaces/Repositories/ITelevisionRepository.cs

@@ -14,6 +14,7 @@ public interface ITelevisionRepository
     Task<List<SeasonMetadata>> GetSeasonsForCards(List<int> ids);
     Task<List<EpisodeMetadata>> GetEpisodesForCards(List<int> ids);
     Task<List<Episode>> GetShowItems(int showId);
+    Task<List<int>> GetEpisodeIdsForShow(int showId);
     Task<List<Season>> GetAllSeasons();
     Task<Option<Season>> GetSeason(int seasonId);
     Task<int> GetSeasonCount(int showId);

ErsatzTV.Infrastructure.MySql/Migrations/20250627233410_Add_TagExternalTypeId.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.MySql.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add_TagExternalTypeId : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ExternalTypeId",
+                table: "Tag",
+                type: "longtext",
+                nullable: true)
+                .Annotation("MySql:CharSet", "utf8mb4");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ExternalTypeId",
+                table: "Tag");
+        }
+    }
+}

ErsatzTV.Infrastructure.MySql/Migrations/20250628002704_Add_PlexLibraryLastNetworksScan.cs

@@ -0,0 +1,29 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.MySql.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add_PlexLibraryLastNetworksScan : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "LastNetworksScan",
+                table: "PlexLibrary",
+                type: "datetime(6)",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "LastNetworksScan",
+                table: "PlexLibrary");
+        }
+    }
+}

ErsatzTV.Infrastructure.MySql/Migrations/TvContextModelSnapshot.cs

@@ -3008,6 +3008,9 @@ namespace ErsatzTV.Infrastructure.MySql.Migrations
                     b.Property<string>("ExternalCollectionId")
                         .HasColumnType("longtext");
 
+                    b.Property<string>("ExternalTypeId")
+                        .HasColumnType("longtext");
+
                     b.Property<int?>("ImageMetadataId")
                         .HasColumnType("int");
 
@@ -3270,6 +3273,9 @@ namespace ErsatzTV.Infrastructure.MySql.Migrations
                     b.Property<string>("Key")
                         .HasColumnType("longtext");
 
+                    b.Property<DateTime?>("LastNetworksScan")
+                        .HasColumnType("datetime(6)");
+
                     b.Property<bool>("ShouldSyncItems")
                         .HasColumnType("tinyint(1)");
 

ErsatzTV.Infrastructure.Sqlite/Migrations/20250627233314_Add_TagExternalTypeId.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.Sqlite.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add_TagExternalTypeId : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ExternalTypeId",
+                table: "Tag",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ExternalTypeId",
+                table: "Tag");
+        }
+    }
+}

ErsatzTV.Infrastructure.Sqlite/Migrations/20250628002724_Add_PlexLibraryLastNetworksScan.cs

@@ -0,0 +1,29 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.Sqlite.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add_PlexLibraryLastNetworksScan : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "LastNetworksScan",
+                table: "PlexLibrary",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "LastNetworksScan",
+                table: "PlexLibrary");
+        }
+    }
+}

ErsatzTV.Infrastructure.Sqlite/Migrations/TvContextModelSnapshot.cs

@@ -2859,6 +2859,9 @@ namespace ErsatzTV.Infrastructure.Sqlite.Migrations
                     b.Property<string>("ExternalCollectionId")
                         .HasColumnType("TEXT");
 
+                    b.Property<string>("ExternalTypeId")
+                        .HasColumnType("TEXT");
+
                     b.Property<int?>("ImageMetadataId")
                         .HasColumnType("INTEGER");
 
@@ -3109,6 +3112,9 @@ namespace ErsatzTV.Infrastructure.Sqlite.Migrations
                     b.Property<string>("Key")
                         .HasColumnType("TEXT");
 
+                    b.Property<DateTime?>("LastNetworksScan")
+                        .HasColumnType("TEXT");
+
                     b.Property<bool>("ShouldSyncItems")
                         .HasColumnType("INTEGER");
 

ErsatzTV.Infrastructure/Data/Repositories/PlexTelevisionRepository.cs

@@ -1,4 +1,5 @@
-using Dapper;
+using System.Globalization;
+using Dapper;
 using ErsatzTV.Core;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Errors;
@@ -570,4 +571,76 @@ public class PlexTelevisionRepository : IPlexTelevisionRepository
             return BaseError.New("Failed to update episode path");
         }
     }
+
+    public async Task<List<int>> RemoveAllTags(
+        PlexLibrary library,
+        PlexTag tag,
+        System.Collections.Generic.HashSet<int> keep)
+    {
+        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync();
+
+        var tagType = tag.TagType.ToString(CultureInfo.InvariantCulture);
+
+        List<int> result = await dbContext.ShowMetadata
+            .Where(sm => !keep.Contains(sm.ShowId))
+            .Where(sm => sm.Show.LibraryPath.LibraryId == library.Id)
+            .Where(sm => sm.Tags.Any(t => t.Name == tag.Tag && t.ExternalTypeId == tagType))
+            .Select(sm => sm.ShowId)
+            .ToListAsync();
+
+        if (result.Count > 0)
+        {
+            List<int> tagIds = await dbContext.ShowMetadata
+                .Where(sm => result.Contains(sm.ShowId))
+                .Where(sm => sm.Tags.Any(t => t.Name == tag.Tag && t.ExternalTypeId == tagType))
+                .SelectMany(sm => sm.Tags.Select(t => t.Id))
+                .ToListAsync();
+
+            // delete all tags
+            await dbContext.Connection.ExecuteAsync("DELETE FROM Tag WHERE Id IN @TagIds", new { TagIds = tagIds });
+        }
+
+        // show ids to refresh
+        return result;
+    }
+
+    public async Task<PlexShowAddTagResult> AddTag(PlexShow show, PlexTag tag)
+    {
+        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync();
+
+        int existingShowId = await dbContext.Connection.ExecuteScalarAsync<int>(
+            @"SELECT PS.Id FROM Tag
+            INNER JOIN ShowMetadata SM on SM.Id = Tag.ShowMetadataId
+            INNER JOIN PlexShow PS on PS.Id = SM.ShowId
+            WHERE PS.Key = @Key AND Tag.Name = @Tag AND Tag.ExternalTypeId = @TagType",
+            new { show.Key, tag.Tag, tag.TagType });
+
+        // already exists
+        if (existingShowId > 0)
+        {
+            return new PlexShowAddTagResult(existingShowId, Option<int>.None);
+        }
+
+        int showId = await dbContext.PlexShows
+            .Where(s => s.Key == show.Key)
+            .Select(s => s.Id)
+            .FirstOrDefaultAsync();
+
+        await dbContext.Connection.ExecuteAsync(
+            @"INSERT INTO Tag (Name, ExternalTypeId, ShowMetadataId)
+              SELECT @Tag, @TagType, Id FROM
+              (SELECT Id FROM ShowMetadata WHERE ShowId = @ShowId) AS A",
+            new { tag.Tag, tag.TagType, ShowId = showId });
+
+        // show id to refresh
+        return new PlexShowAddTagResult(Option<int>.None, showId);
+    }
+
+    public async Task UpdateLastNetworksScan(PlexLibrary library)
+    {
+        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync();
+        await dbContext.Connection.ExecuteAsync(
+            "UPDATE PlexLibrary SET LastNetworksScan = @LastNetworksScan WHERE Id = @Id",
+            new { library.LastNetworksScan, library.Id });
+    }
 }

ErsatzTV.Infrastructure/Data/Repositories/TelevisionRepository.cs

@@ -136,6 +136,17 @@ public class TelevisionRepository : ITelevisionRepository
             .ToListAsync();
     }
 
+    public async Task<List<int>> GetEpisodeIdsForShow(int showId)
+    {
+        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync();
+        return (await dbContext.Connection.QueryAsync<int>(
+            @"SELECT Episode.Id FROM `Show`
+            INNER JOIN Season ON Season.ShowId = `Show`.Id
+            INNER JOIN Episode ON Episode.SeasonId = Season.Id
+            WHERE `Show`.Id = @ShowId",
+            new { ShowId = showId })).ToList();
+    }
+
     public async Task<List<Season>> GetAllSeasons()
     {
         await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync();

ErsatzTV.Infrastructure/Plex/IPlexServerApi.cs

@@ -1,5 +1,7 @@
-using ErsatzTV.Infrastructure.Plex.Models;
+using System.Collections.Specialized;
+using ErsatzTV.Infrastructure.Plex.Models;
 using Refit;
+using CollectionFormat = Refit.CollectionFormat;
 
 namespace ErsatzTV.Infrastructure.Plex;
 
@@ -73,6 +75,48 @@ public interface IPlexServerApi
             [Query] [AliasAs("X-Plex-Token")]
             string token);
 
+    [Get("/library/tags?type={type}&X-Plex-Container-Start=0&X-Plex-Container-Size=0")]
+    [Headers("Accept: text/xml")]
+    public Task<PlexXmlMediaContainerStatsResponse> GetTagsCount(
+        int type,
+        [Query] [AliasAs("X-Plex-Token")]
+        string token);
+
+    [Get("/library/tags?type={type}")]
+    [Headers("Accept: application/json")]
+    public Task<PlexMediaContainerResponse<PlexMediaContainerDirectoryContent<PlexTagMetadataResponse>>>
+        GetTags(
+            int type,
+            [Query] [AliasAs("X-Plex-Container-Start")]
+            int skip,
+            [Query] [AliasAs("X-Plex-Container-Size")]
+            int take,
+            [Query] [AliasAs("X-Plex-Token")]
+            string token);
+
+    [Get("/library/sections/{key}/all?X-Plex-Container-Start=0&X-Plex-Container-Size=0")]
+    [Headers("Accept: text/xml")]
+    public Task<PlexXmlMediaContainerStatsResponse> CountTagContents(
+        string key,
+        [Query] [AliasAs("X-Plex-Token")]
+        string token,
+        [Query]
+        NetworkFilter filter);
+
+    [Get("/library/sections/{key}/all")]
+    [Headers("Accept: application/json")]
+    public Task<PlexMediaContainerResponse<PlexMediaContainerMetadataContent<PlexMetadataResponse>>>
+        GetTagContents(
+            string key,
+            [Query] [AliasAs("X-Plex-Container-Start")]
+            int skip,
+            [Query] [AliasAs("X-Plex-Container-Size")]
+            int take,
+            [Query] [AliasAs("X-Plex-Token")]
+            string token,
+            [Query]
+            NetworkFilter filter);
+
     [Get("/library/metadata/{key}?includeChapters=1")]
     [Headers("Accept: text/xml")]
     public Task<PlexXmlVideoMetadataResponseContainer>

ErsatzTV.Infrastructure/Plex/Models/PlexTagMetadataResponse.cs

@@ -0,0 +1,18 @@
+using System.Xml.Serialization;
+
+namespace ErsatzTV.Infrastructure.Plex.Models;
+
+public class PlexTagMetadataResponse
+{
+    [XmlAttribute("id")]
+    public int Id { get; set; }
+
+    [XmlAttribute("filter")]
+    public string Filter { get; set; }
+
+    [XmlAttribute("tag")]
+    public string Tag { get; set; }
+
+    [XmlAttribute("tagType")]
+    public int TagType { get; set; }
+}

ErsatzTV.Infrastructure/Plex/NetworkFilter.cs

@@ -0,0 +1,9 @@
+using Refit;
+
+namespace ErsatzTV.Infrastructure.Plex;
+
+public class NetworkFilter
+{
+    [AliasAs("network")]
+    public string Network { get; set; }
+}

ErsatzTV.Infrastructure/Plex/PlexServerApiClient.cs

@@ -1,4 +1,6 @@
+using System.Collections.Specialized;
 using System.Globalization;
+using System.Web;
 using System.Xml.Serialization;
 using ErsatzTV.Core;
 using ErsatzTV.Core.Domain;
@@ -340,6 +342,60 @@ public class PlexServerApiClient : IPlexServerApiClient
         }
     }
 
+    public IAsyncEnumerable<Tuple<PlexTag, int>> GetAllTags(
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        int tagType,
+        CancellationToken cancellationToken)
+    {
+        return GetPagedLibraryContents(connection, CountItems, GetItems);
+
+        Task<PlexXmlMediaContainerStatsResponse> CountItems(IPlexServerApi service)
+        {
+            return service.GetTagsCount(tagType, token.AuthToken);
+        }
+
+        Task<IEnumerable<PlexTag>> GetItems(IPlexServerApi _, IPlexServerApi jsonService, int skip, int pageSize)
+        {
+            return jsonService
+                .GetTags(tagType, skip, pageSize, token.AuthToken)
+                .Map(r => r.MediaContainer.Directory)
+                .Map(list => list.Map(ProjectToTag).Somes());
+        }
+    }
+
+    public IAsyncEnumerable<Tuple<PlexShow, int>> GetTagShowContents(
+        PlexLibrary library,
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        PlexTag tag)
+    {
+        string network = string.Empty;
+
+        NameValueCollection parsedFilter = HttpUtility.ParseQueryString(tag.Filter);
+        foreach (string key in parsedFilter.AllKeys.Filter(k => k is not null))
+        {
+            network = parsedFilter[key];
+        }
+
+        var filter = new NetworkFilter { Network = network };
+
+        return GetPagedLibraryContents(connection, CountItems, GetItems);
+
+        Task<PlexXmlMediaContainerStatsResponse> CountItems(IPlexServerApi service)
+        {
+            return service.CountTagContents(library.Key, token.AuthToken, filter);
+        }
+
+        Task<IEnumerable<PlexShow>> GetItems(IPlexServerApi _, IPlexServerApi jsonService, int skip, int pageSize)
+        {
+            return jsonService
+                .GetTagContents(library.Key, skip, pageSize, token.AuthToken, filter)
+                .Map(r => r.MediaContainer.Metadata ?? [])
+                .Map(list => list.Map(metadata => ProjectToShow(metadata, library.MediaSourceId)));
+        }
+    }
+
     private static async IAsyncEnumerable<Tuple<TItem, int>> GetPagedLibraryContents<TItem>(
         PlexConnection connection,
         Func<IPlexServerApi, Task<PlexXmlMediaContainerStatsResponse>> countItems,
@@ -479,6 +535,25 @@ public class PlexServerApiClient : IPlexServerApiClient
         }
     }
 
+    private Option<PlexTag> ProjectToTag(PlexTagMetadataResponse item)
+    {
+        try
+        {
+            return new PlexTag
+            {
+                Id = item.Id,
+                Filter = item.Filter,
+                Tag = item.Tag,
+                TagType = item.TagType
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Error projecting Plex tag");
+            return None;
+        }
+    }
+
     private PlexMovie ProjectToMovie(PlexMetadataResponse response, int mediaSourceId)
     {
         PlexMediaResponse<PlexPartResponse> media = response.Media

ErsatzTV.Infrastructure/Search/ElasticSearchIndex.cs

@@ -50,7 +50,7 @@ public class ElasticSearchIndex : ISearchIndex
         return exists.IsValidResponse;
     }
 
-    public int Version => 45;
+    public int Version => 47;
 
     public async Task<bool> Initialize(
         ILocalFileSystem localFileSystem,
@@ -236,6 +236,7 @@ public class ElasticSearchIndex : ISearchIndex
                         .Text(t => t.Tag, t => t.Store(false))
                         .Keyword(t => t.TagFull, t => t.Store(false))
                         .Text(t => t.Studio, t => t.Store(false))
+                        .Text(t => t.Network, t => t.Store(false))
                         .Text(t => t.Actor, t => t.Store(false))
                         .Text(t => t.Director, t => t.Store(false))
                         .Text(t => t.Writer, t => t.Store(false))
@@ -245,6 +246,7 @@ public class ElasticSearchIndex : ISearchIndex
                         .Text(t => t.ShowGenre, t => t.Store(false))
                         .Text(t => t.ShowTag, t => t.Store(false))
                         .Text(t => t.ShowStudio, t => t.Store(false))
+                        .Text(t => t.ShowNetwork, t => t.Store(false))
                         .Keyword(t => t.ShowContentRating, t => t.Store(false))
                         .Text(t => t.Style, t => t.Store(false))
                         .Text(t => t.Mood, t => t.Store(false))
@@ -372,9 +374,10 @@ public class ElasticSearchIndex : ISearchIndex
                     AddedDate = GetAddedDate(metadata.DateAdded),
                     Plot = metadata.Plot ?? string.Empty,
                     Genre = metadata.Genres.Map(g => g.Name).ToList(),
-                    Tag = metadata.Tags.Map(t => t.Name).ToList(),
-                    TagFull = metadata.Tags.Map(t => t.Name).ToList(),
+                    Tag = metadata.Tags.Where(t => string.IsNullOrWhiteSpace(t.ExternalTypeId)).Map(t => t.Name).ToList(),
+                    TagFull = metadata.Tags.Where(t => string.IsNullOrWhiteSpace(t.ExternalTypeId)).Map(t => t.Name).ToList(),
                     Studio = metadata.Studios.Map(s => s.Name).ToList(),
+                    Network = metadata.Tags.Where(t => t.ExternalTypeId == Tag.PlexNetworkTypeId).Map(t => t.Name).ToList(),
                     Actor = metadata.Actors.Map(a => a.Name).ToList(),
                     TraktList = show.TraktListItems.Map(t => t.TraktList.TraktId.ToString(CultureInfo.InvariantCulture))
                         .ToList()
@@ -628,8 +631,9 @@ public class ElasticSearchIndex : ISearchIndex
                 {
                     doc.ShowTitle = showMetadata.Title;
                     doc.ShowGenre = showMetadata.Genres.Map(g => g.Name).ToList();
-                    doc.ShowTag = showMetadata.Tags.Map(t => t.Name).ToList();
+                    doc.ShowTag = showMetadata.Tags.Where(t => string.IsNullOrWhiteSpace(t.ExternalTypeId)).Map(t => t.Name).ToList();
                     doc.ShowStudio = showMetadata.Studios.Map(s => s.Name).ToList();
+                    doc.ShowNetwork = showMetadata.Tags.Where(t => t.ExternalTypeId == Tag.PlexNetworkTypeId).Map(t => t.Name).ToList();
                     doc.ShowContentRating = GetContentRatings(showMetadata.ContentRating);
                 }
 

ErsatzTV.Infrastructure/Search/LuceneSearchIndex.cs

@@ -42,6 +42,7 @@ public sealed class LuceneSearchIndex : ISearchIndex
     internal const string TitleAndYearField = "title_and_year";
     internal const string JumpLetterField = "jump_letter";
     internal const string StudioField = "studio";
+    internal const string NetworkField = "network";
     internal const string LanguageField = "language";
     internal const string LanguageTagField = "language_tag";
     internal const string SubLanguageField = "sub_language";
@@ -61,6 +62,7 @@ public sealed class LuceneSearchIndex : ISearchIndex
     internal const string ShowGenreField = "show_genre";
     internal const string ShowTagField = "show_tag";
     internal const string ShowStudioField = "show_studio";
+    internal const string ShowNetworkField = "show_network";
     internal const string ShowContentRatingField = "show_content_rating";
     internal const string MetadataKindField = "metadata_kind";
     internal const string VideoCodecField = "video_codec";
@@ -114,7 +116,7 @@ public sealed class LuceneSearchIndex : ISearchIndex
         return Task.FromResult(directoryExists && fileExists);
     }
 
-    public int Version => 46;
+    public int Version => 47;
 
     public async Task<bool> Initialize(
         ILocalFileSystem localFileSystem,
@@ -653,10 +655,17 @@ public sealed class LuceneSearchIndex : ISearchIndex
                 }
 
                 foreach (Tag tag in metadata.Tags)
+                {
+                    if (tag.ExternalTypeId == Tag.PlexNetworkTypeId)
+                    {
+                        doc.Add(new TextField(NetworkField, tag.Name, Field.Store.NO));
+                    }
+                    else
                     {
                         doc.Add(new TextField(TagField, tag.Name, Field.Store.NO));
                         doc.Add(new StringField(TagFullField, tag.Name, Field.Store.NO));
                     }
+                }
 
                 foreach (Studio studio in metadata.Studios)
                 {
@@ -1025,9 +1034,16 @@ public sealed class LuceneSearchIndex : ISearchIndex
                     }
 
                     foreach (Tag tag in showMetadata.Tags)
+                    {
+                        if (tag.ExternalTypeId == Tag.PlexNetworkTypeId)
+                        {
+                            doc.Add(new TextField(ShowNetworkField, tag.Name, Field.Store.NO));
+                        }
+                        else
                         {
                             doc.Add(new TextField(ShowTagField, tag.Name, Field.Store.NO));
                         }
+                    }
 
                     foreach (Studio studio in showMetadata.Studios)
                     {

ErsatzTV.Infrastructure/Search/Models/ElasticSearchItem.cs

@@ -91,6 +91,9 @@ public class ElasticSearchItem : MinimalElasticSearchItem
     [JsonPropertyName(LuceneSearchIndex.StudioField)]
     public List<string> Studio { get; set; }
 
+    [JsonPropertyName(LuceneSearchIndex.NetworkField)]
+    public List<string> Network { get; set; }
+
     [JsonPropertyName(LuceneSearchIndex.ArtistField)]
     public List<string> Artist { get; set; }
 
@@ -124,6 +127,9 @@ public class ElasticSearchItem : MinimalElasticSearchItem
     [JsonPropertyName(LuceneSearchIndex.ShowStudioField)]
     public List<string> ShowStudio { get; set; }
 
+    [JsonPropertyName(LuceneSearchIndex.ShowNetworkField)]
+    public List<string> ShowNetwork { get; set; }
+
     [JsonPropertyName(LuceneSearchIndex.ShowContentRatingField)]
     public List<string> ShowContentRating { get; set; }
 

ErsatzTV.Scanner/Application/Plex/Commands/SynchronizePlexNetworks.cs

@@ -0,0 +1,5 @@
+using ErsatzTV.Core;
+
+namespace ErsatzTV.Scanner.Application.Plex;
+
+public record SynchronizePlexNetworks(int PlexLibraryId, bool ForceScan) : IRequest<Either<BaseError, Unit>>;

ErsatzTV.Scanner/Application/Plex/Commands/SynchronizePlexNetworksHandler.cs

@@ -0,0 +1,126 @@
+using ErsatzTV.Core;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Interfaces.Plex;
+using ErsatzTV.Core.Interfaces.Repositories;
+using ErsatzTV.Core.Plex;
+
+namespace ErsatzTV.Scanner.Application.Plex;
+
+public class SynchronizePlexNetworksHandler : IRequestHandler<SynchronizePlexNetworks, Either<BaseError, Unit>>
+{
+    private readonly IConfigElementRepository _configElementRepository;
+    private readonly IPlexTelevisionRepository _plexTelevisionRepository;
+    private readonly IMediaSourceRepository _mediaSourceRepository;
+    private readonly IPlexSecretStore _plexSecretStore;
+    private readonly IPlexNetworkScanner _scanner;
+
+    public SynchronizePlexNetworksHandler(
+        IMediaSourceRepository mediaSourceRepository,
+        IPlexSecretStore plexSecretStore,
+        IPlexNetworkScanner scanner,
+        IConfigElementRepository configElementRepository,
+        IPlexTelevisionRepository plexTelevisionRepository)
+    {
+        _mediaSourceRepository = mediaSourceRepository;
+        _plexSecretStore = plexSecretStore;
+        _scanner = scanner;
+        _configElementRepository = configElementRepository;
+        _plexTelevisionRepository = plexTelevisionRepository;
+    }
+
+    public async Task<Either<BaseError, Unit>> Handle(
+        SynchronizePlexNetworks request,
+        CancellationToken cancellationToken)
+    {
+        Validation<BaseError, RequestParameters> validation = await Validate(request);
+        return await validation.Match(
+            p => SynchronizeNetworks(p, cancellationToken),
+            error => Task.FromResult<Either<BaseError, Unit>>(error.Join()));
+    }
+
+    private async Task<Validation<BaseError, RequestParameters>> Validate(SynchronizePlexNetworks request)
+    {
+        Task<Validation<BaseError, ConnectionParameters>> mediaSource = MediaSourceMustExist(request)
+            .BindT(MediaSourceMustHaveActiveConnection)
+            .BindT(MediaSourceMustHaveToken);
+
+        return (await mediaSource, await PlexLibraryMustExist(request), await ValidateLibraryRefreshInterval())
+            .Apply(
+                (connectionParameters, plexLibrary, libraryRefreshInterval) => new RequestParameters(
+                    connectionParameters,
+                    plexLibrary,
+                    request.ForceScan,
+                    libraryRefreshInterval));
+    }
+
+    private Task<Validation<BaseError, PlexLibrary>> PlexLibraryMustExist(
+        SynchronizePlexNetworks request) =>
+        _mediaSourceRepository.GetPlexLibrary(request.PlexLibraryId)
+            .Map(v => v.ToValidation<BaseError>($"Plex library {request.PlexLibraryId} does not exist."));
+
+    private Task<Validation<BaseError, int>> ValidateLibraryRefreshInterval() =>
+        _configElementRepository.GetValue<int>(ConfigElementKey.LibraryRefreshInterval)
+            .FilterT(lri => lri is >= 0 and < 1_000_000)
+            .Map(lri => lri.ToValidation<BaseError>("Library refresh interval is invalid"));
+
+    private Task<Validation<BaseError, PlexMediaSource>> MediaSourceMustExist(
+        SynchronizePlexNetworks request) =>
+        _mediaSourceRepository.GetPlexByLibraryId(request.PlexLibraryId)
+            .Map(o => o.ToValidation<BaseError>($"Plex media source for library {request.PlexLibraryId} does not exist."));
+
+    private static Validation<BaseError, ConnectionParameters> MediaSourceMustHaveActiveConnection(
+        PlexMediaSource plexMediaSource)
+    {
+        Option<PlexConnection> maybeConnection = plexMediaSource.Connections.SingleOrDefault(c => c.IsActive);
+        return maybeConnection.Map(connection => new ConnectionParameters(plexMediaSource, connection))
+            .ToValidation<BaseError>("Plex media source requires an active connection");
+    }
+
+    private async Task<Validation<BaseError, ConnectionParameters>> MediaSourceMustHaveToken(
+        ConnectionParameters connectionParameters)
+    {
+        Option<PlexServerAuthToken> maybeToken = await
+            _plexSecretStore.GetServerAuthToken(connectionParameters.PlexMediaSource.ClientIdentifier);
+        return maybeToken.Map(token => connectionParameters with { PlexServerAuthToken = token })
+            .ToValidation<BaseError>("Plex media source requires a token");
+    }
+
+    private async Task<Either<BaseError, Unit>> SynchronizeNetworks(
+        RequestParameters parameters,
+        CancellationToken cancellationToken)
+    {
+        var lastScan = new DateTimeOffset(
+            parameters.Library.LastNetworksScan ?? SystemTime.MinValueUtc,
+            TimeSpan.Zero);
+        DateTimeOffset nextScan = lastScan + TimeSpan.FromHours(parameters.LibraryRefreshInterval);
+        if (parameters.ForceScan || parameters.LibraryRefreshInterval > 0 && nextScan < DateTimeOffset.Now)
+        {
+            Either<BaseError, Unit> result = await _scanner.ScanNetworks(
+                parameters.Library,
+                parameters.ConnectionParameters.ActiveConnection,
+                parameters.ConnectionParameters.PlexServerAuthToken,
+                cancellationToken);
+
+            if (result.IsRight)
+            {
+                parameters.Library.LastNetworksScan = DateTime.UtcNow;
+                await _plexTelevisionRepository.UpdateLastNetworksScan(parameters.Library);
+            }
+
+            return result;
+        }
+
+        return Unit.Default;
+    }
+
+    private record RequestParameters(
+        ConnectionParameters ConnectionParameters,
+        PlexLibrary Library,
+        bool ForceScan,
+        int LibraryRefreshInterval);
+
+    private record ConnectionParameters(PlexMediaSource PlexMediaSource, PlexConnection ActiveConnection)
+    {
+        public PlexServerAuthToken? PlexServerAuthToken { get; set; }
+    }
+}

ErsatzTV.Scanner/Core/Plex/PlexNetworkScanner.cs

@@ -0,0 +1,99 @@
+using ErsatzTV.Core;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Interfaces.Plex;
+using ErsatzTV.Core.Interfaces.Repositories;
+using ErsatzTV.Core.MediaSources;
+using ErsatzTV.Core.Plex;
+using Microsoft.Extensions.Logging;
+
+namespace ErsatzTV.Scanner.Core.Plex;
+
+public class PlexNetworkScanner(
+    IPlexServerApiClient plexServerApiClient,
+    IPlexTelevisionRepository plexTelevisionRepository,
+    ITelevisionRepository televisionRepository,
+    IMediator mediator,
+    ILogger<PlexNetworkScanner> logger) : IPlexNetworkScanner
+{
+    public async Task<Either<BaseError, Unit>> ScanNetworks(
+        PlexLibrary library,
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        CancellationToken cancellationToken)
+    {
+        // logger.LogDebug("Scanning Plex networks...");
+
+        await foreach ((PlexTag tag, int _) in plexServerApiClient.GetAllTags(
+                           connection,
+                           token,
+                           319,
+                           cancellationToken))
+        {
+            // logger.LogDebug("Found Plex network {Tag}", tag.Tag);
+
+            await SyncNetworkItems(library, connection, token, tag, cancellationToken);
+        }
+
+        return Either<BaseError, Unit>.Right(Unit.Default);
+    }
+
+    private async Task SyncNetworkItems(
+        PlexLibrary library,
+        PlexConnection connection,
+        PlexServerAuthToken token,
+        PlexTag tag,
+        CancellationToken cancellationToken)
+    {
+        try
+        {
+            // get network items from Plex
+            IAsyncEnumerable<Tuple<PlexShow, int>> items = plexServerApiClient.GetTagShowContents(
+                library,
+                connection,
+                token,
+                tag);
+
+            // sync tags (networks) on items
+            var addedIds = new System.Collections.Generic.HashSet<int>();
+            var keepIds = new System.Collections.Generic.HashSet<int>();
+            await foreach ((PlexShow item, int _) in items)
+            {
+                PlexShowAddTagResult result = await plexTelevisionRepository.AddTag(item, tag);
+
+                foreach (int existing in result.Existing)
+                {
+                    keepIds.Add(existing);
+                }
+
+                foreach (int added in result.Added)
+                {
+                    addedIds.Add(added);
+                    keepIds.Add(added);
+                }
+
+                cancellationToken.ThrowIfCancellationRequested();
+            }
+
+            List<int> removedIds = await plexTelevisionRepository.RemoveAllTags(library, tag, keepIds);
+            var changedIds = removedIds.Concat(addedIds).Distinct().ToList();
+
+            if (changedIds.Count > 0)
+            {
+                logger.LogDebug("Plex network {Name} contains {Count} changed items", tag.Tag, changedIds.Count);
+            }
+
+            foreach (int showId in changedIds.ToArray())
+            {
+                changedIds.AddRange(await televisionRepository.GetEpisodeIdsForShow(showId));
+            }
+
+            await mediator.Publish(
+                new ScannerProgressUpdate(0, null, null, changedIds.ToArray(), []),
+                CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Failed to synchronize Plex network {Name}", tag.Tag);
+        }
+    }
+}

ErsatzTV.Scanner/Program.cs

@@ -202,6 +202,7 @@ public class Program
                     services.AddScoped<IPlexOtherVideoLibraryScanner, PlexOtherVideoLibraryScanner>();
                     services.AddScoped<IPlexTelevisionLibraryScanner, PlexTelevisionLibraryScanner>();
                     services.AddScoped<IPlexCollectionScanner, PlexCollectionScanner>();
+                    services.AddScoped<IPlexNetworkScanner, PlexNetworkScanner>();
                     services.AddScoped<IPlexServerApiClient, PlexServerApiClient>();
                     services.AddScoped<IPlexCollectionRepository, PlexCollectionRepository>();
                     services.AddScoped<IPlexMovieRepository, PlexMovieRepository>();

ErsatzTV.Scanner/Worker.cs

@@ -79,6 +79,10 @@ public class Worker : BackgroundService
         scanPlexCollectionsCommand.Arguments.Add(mediaSourceIdArgument);
         scanPlexCollectionsCommand.Options.Add(forceOption);
 
+        var scanPlexNetworksCommand = new Command("scan-plex-networks", "Scan Plex networks");
+        scanPlexNetworksCommand.Arguments.Add(libraryIdArgument);
+        scanPlexNetworksCommand.Options.Add(forceOption);
+
         var scanEmbyCommand = new Command("scan-emby", "Scan an Emby library");
         scanEmbyCommand.Arguments.Add(libraryIdArgument);
         scanEmbyCommand.Options.Add(forceOption);
@@ -152,6 +156,24 @@ public class Worker : BackgroundService
                 }
             });
 
+        scanPlexNetworksCommand.SetAction(
+            async (parseResult, token) =>
+            {
+                if (IsScanningEnabled())
+                {
+                    bool force = parseResult.GetValue(forceOption);
+                    SetProcessPriority(force);
+
+                    int libraryId = parseResult.GetValue(libraryIdArgument);
+
+                    using IServiceScope scope = _serviceScopeFactory.CreateScope();
+                    IMediator mediator = scope.ServiceProvider.GetRequiredService<IMediator>();
+
+                    var scan = new SynchronizePlexNetworks(libraryId, force);
+                    await mediator.Send(scan, token);
+                }
+            });
+
         scanEmbyCommand.SetAction(
             async (parseResult, token) =>
             {
@@ -230,6 +252,7 @@ public class Worker : BackgroundService
         rootCommand.Subcommands.Add(scanLocalCommand);
         rootCommand.Subcommands.Add(scanPlexCommand);
         rootCommand.Subcommands.Add(scanPlexCollectionsCommand);
+        rootCommand.Subcommands.Add(scanPlexNetworksCommand);
         rootCommand.Subcommands.Add(scanEmbyCommand);
         rootCommand.Subcommands.Add(scanEmbyCollectionsCommand);
         rootCommand.Subcommands.Add(scanJellyfinCommand);

ErsatzTV/Pages/Libraries.razor

@@ -180,6 +180,7 @@
                 case PlexLibraryViewModel:
                     await ScannerWorkerChannel.WriteAsync(new SynchronizePlexLibraries(library.MediaSourceId), _cts.Token);
                     await ScannerWorkerChannel.WriteAsync(new ForceSynchronizePlexLibraryById(library.Id, deepScan), _cts.Token);
+                    await ScannerWorkerChannel.WriteAsync(new SynchronizePlexNetworks(library.Id, true), _cts.Token);
                     break;
                 case JellyfinLibraryViewModel:
                     await ScannerWorkerChannel.WriteAsync(new SynchronizeJellyfinLibraries(library.MediaSourceId), _cts.Token);

ErsatzTV/Pages/TelevisionSeasonList.razor

@@ -116,6 +116,18 @@
                     }
                 </div>
             }
+            @if (_sortedNetworks.Any())
+            {
+                <div style="display: flex; flex-direction: row; flex-wrap: wrap">
+                    <MudText GutterBottom="true">Networks:&nbsp;</MudText>
+                    <MudLink Href="@(@$"network:""{_sortedNetworks.Head().ToLowerInvariant()}""".GetRelativeSearchQuery())">@_sortedNetworks.Head()</MudLink>
+                    @foreach (string network in _sortedNetworks.Skip(1))
+                    {
+                        <MudText>,&nbsp;</MudText>
+                        <MudLink Href="@(@$"network:""{network.ToLowerInvariant()}""".GetRelativeSearchQuery())">@network</MudLink>
+                    }
+                </div>
+            }
             @if (_sortedGenres.Any())
             {
                 <div style="display: flex; flex-direction: row; flex-wrap: wrap">
@@ -176,11 +188,12 @@
     public int ShowId { get; set; }
 
     private TelevisionShowViewModel _show;
-    private List<string> _sortedContentRatings = new();
-    private List<CultureInfo> _sortedLanguages = new();
-    private List<string> _sortedStudios = new();
-    private List<string> _sortedGenres = new();
-    private List<string> _sortedTags = new();
+    private List<string> _sortedContentRatings = [];
+    private List<CultureInfo> _sortedLanguages = [];
+    private List<string> _sortedStudios = [];
+    private List<string> _sortedNetworks = [];
+    private List<string> _sortedGenres = [];
+    private List<string> _sortedTags = [];
 
     private int _pageSize => 100;
     private readonly int _pageNumber = 1;
@@ -197,17 +210,17 @@
 
     private async Task RefreshData()
     {
-        await Mediator.Send(new GetTelevisionShowById(ShowId), _cts.Token)
-            .IfSomeAsync(
-                vm =>
+        Option<TelevisionShowViewModel> maybeShow = await Mediator.Send(new GetTelevisionShowById(ShowId), _cts.Token);
+        foreach (TelevisionShowViewModel show in maybeShow)
         {
-                    _show = vm;
+            _show = show;
             _sortedContentRatings = _show.ContentRatings.OrderBy(cr => cr).ToList();
             _sortedLanguages = _show.Languages.OrderBy(ci => ci.EnglishName).ToList();
             _sortedStudios = _show.Studios.OrderBy(s => s).ToList();
             _sortedGenres = _show.Genres.OrderBy(g => g).ToList();
             _sortedTags = _show.Tags.OrderBy(t => t).ToList();
-                });
+            _sortedNetworks = _show.Networks.OrderBy(n => n).ToList();
+        }
 
         _data = await Mediator.Send(new GetTelevisionSeasonCards(ShowId, _pageNumber, _pageSize), _cts.Token);
     }

ErsatzTV/Services/ScannerService.cs

@@ -57,6 +57,9 @@ public class ScannerService : BackgroundService
                         case SynchronizePlexCollections synchronizePlexCollections:
                             requestTask = SynchronizePlexCollections(synchronizePlexCollections, stoppingToken);
                             break;
+                        case SynchronizePlexNetworks synchronizePlexNetworks:
+                            requestTask = SynchronizePlexNetworks(synchronizePlexNetworks, stoppingToken);
+                            break;
                         case SynchronizeJellyfinLibraries synchronizeJellyfinLibraries:
                             requestTask = SynchronizeLibraries(synchronizeJellyfinLibraries, stoppingToken);
                             break;
@@ -220,6 +223,40 @@ public class ScannerService : BackgroundService
         }
     }
 
+    private async Task SynchronizePlexNetworks(
+        SynchronizePlexNetworks request,
+        CancellationToken cancellationToken)
+    {
+        using IServiceScope scope = _serviceScopeFactory.CreateScope();
+        IMediator mediator = scope.ServiceProvider.GetRequiredService<IMediator>();
+        IEntityLocker entityLocker = scope.ServiceProvider.GetRequiredService<IEntityLocker>();
+
+        Either<BaseError, Unit> result = await mediator.Send(request, cancellationToken);
+        result.BiIter(
+            _ => _logger.LogDebug("Done synchronizing plex networks for library {LibraryId}", request.PlexLibraryId),
+            error =>
+            {
+                if (error is ScanIsNotRequired)
+                {
+                    _logger.LogDebug(
+                        "Scan is not required for plex networks in library {LibraryId} at this time",
+                        request.PlexLibraryId);
+                }
+                else
+                {
+                    _logger.LogWarning(
+                        "Unable to synchronize plex networks for library {LibraryId}: {Error}",
+                        request.PlexLibraryId,
+                        error.Value);
+                }
+            });
+
+        if (entityLocker.IsLibraryLocked(request.PlexLibraryId))
+        {
+            entityLocker.UnlockLibrary(request.PlexLibraryId);
+        }
+    }
+
     private async Task SynchronizeLibraries(SynchronizeJellyfinLibraries request, CancellationToken cancellationToken)
     {
         using IServiceScope scope = _serviceScopeFactory.CreateScope();

ErsatzTV/Services/SchedulerService.cs

@@ -247,6 +247,13 @@ public class SchedulerService : BackgroundService
                 await _scannerWorkerChannel.WriteAsync(
                     new SynchronizePlexLibraryByIdIfNeeded(library.Id),
                     cancellationToken);
+
+                if (library.MediaKind is LibraryMediaKind.Shows)
+                {
+                    await _scannerWorkerChannel.WriteAsync(
+                        new SynchronizePlexNetworks(library.Id, false),
+                        cancellationToken);
+                }
             }
         }