elasticsearch relative queries (#1373)

* remove unused code

* fix relative queries with elasticsearch

* fix some double page loads

* simplify language model

ErsatzTV.Application/MediaCards/ArtistCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record ArtistCardResultsViewModel(
     int Count,
     List<ArtistCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/MovieCardResultsViewModel.cs

@@ -2,4 +2,4 @@
 
 namespace ErsatzTV.Application.MediaCards;
 
-public record MovieCardResultsViewModel(int Count, List<MovieCardViewModel> Cards, Option<SearchPageMap> PageMap);
+public record MovieCardResultsViewModel(int Count, List<MovieCardViewModel> Cards, SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/MusicVideoCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record MusicVideoCardResultsViewModel(
     int Count,
     List<MusicVideoCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/OtherVideoCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record OtherVideoCardResultsViewModel(
     int Count,
     List<OtherVideoCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/Queries/GetMusicVideoCardsHandler.cs

@@ -49,6 +49,6 @@ public class GetMusicVideoCardsHandler : IRequestHandler<GetMusicVideoCards, Mus
             results.Add(ProjectToViewModel(musicVideoMetadata, localPath));
         }
 
-        return new MusicVideoCardResultsViewModel(count, results, None);
+        return new MusicVideoCardResultsViewModel(count, results, null);
     }
 }

ErsatzTV.Application/MediaCards/Queries/GetTelevisionEpisodeCardsHandler.cs

@@ -59,6 +59,6 @@ public class
             results.Add(ProjectToViewModel(episodeMetadata, maybeJellyfin, maybeEmby, false, localPath));
         }
 
-        return new TelevisionEpisodeCardResultsViewModel(count, results, Option<SearchPageMap>.None);
+        return new TelevisionEpisodeCardResultsViewModel(count, results, null);
     }
 }

ErsatzTV.Application/MediaCards/Queries/GetTelevisionSeasonCardsHandler.cs

@@ -35,6 +35,6 @@ public class
             .GetPagedSeasons(request.TelevisionShowId, request.PageNumber, request.PageSize)
             .Map(list => list.Map(s => ProjectToViewModel(s, maybeJellyfin, maybeEmby)).ToList());
 
-        return new TelevisionSeasonCardResultsViewModel(count, results, None);
+        return new TelevisionSeasonCardResultsViewModel(count, results, null);
     }
 }

ErsatzTV.Application/MediaCards/SongCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record SongCardResultsViewModel(
     int Count,
     List<SongCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/TelevisionEpisodeCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record TelevisionEpisodeCardResultsViewModel(
     int Count,
     List<TelevisionEpisodeCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/TelevisionSeasonCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record TelevisionSeasonCardResultsViewModel(
     int Count,
     List<TelevisionSeasonCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaCards/TelevisionShowCardResultsViewModel.cs

@@ -5,4 +5,4 @@ namespace ErsatzTV.Application.MediaCards;
 public record TelevisionShowCardResultsViewModel(
     int Count,
     List<TelevisionShowCardViewModel> Cards,
-    Option<SearchPageMap> PageMap);
+    SearchPageMap PageMap);

ErsatzTV.Application/MediaItems/LanguageCodeViewModel.cs

@@ -0,0 +1,4 @@
+namespace ErsatzTV.Application.MediaItems;
+
+// ReSharper disable once InconsistentNaming
+public record LanguageCodeViewModel(string ThreeLetterISOLanguageName, string EnglishName);

ErsatzTV.Application/MediaItems/Queries/GetAllLanguageCodes.cs

@@ -1,5 +1,3 @@
-using System.Globalization;
+namespace ErsatzTV.Application.MediaItems;
 
-namespace ErsatzTV.Application.MediaItems;
+public record GetAllLanguageCodes : IRequest<List<LanguageCodeViewModel>>;
-
-public record GetAllLanguageCodes : IRequest<List<CultureInfo>>;

ErsatzTV.Application/MediaItems/Queries/GetAllLanguageCodesHandler.cs

@@ -3,13 +3,16 @@ using ErsatzTV.Core.Interfaces.Repositories;
 
 namespace ErsatzTV.Application.MediaItems;
 
-public class GetAllLanguageCodesHandler : IRequestHandler<GetAllLanguageCodes, List<CultureInfo>>
+public class GetAllLanguageCodesHandler : IRequestHandler<GetAllLanguageCodes, List<LanguageCodeViewModel>>
 {
     private readonly IMediaItemRepository _mediaItemRepository;
 
     public GetAllLanguageCodesHandler(IMediaItemRepository mediaItemRepository) =>
         _mediaItemRepository = mediaItemRepository;
 
-    public async Task<List<CultureInfo>> Handle(GetAllLanguageCodes request, CancellationToken cancellationToken) =>
+    public async Task<List<LanguageCodeViewModel>> Handle(GetAllLanguageCodes request, CancellationToken cancellationToken)
-        await _mediaItemRepository.GetAllLanguageCodeCultures();
+    {
+        List<CultureInfo> cultures = await _mediaItemRepository.GetAllLanguageCodeCultures();
+        return cultures.Map(c => new LanguageCodeViewModel(c.ThreeLetterISOLanguageName, c.EnglishName)).ToList();
+    }
 }

ErsatzTV.Application/Movies/Mapper.cs

@@ -41,7 +41,7 @@ internal static class Mapper
         };
     }
 
-    private static List<CultureInfo> LanguagesForMovie(List<string> languageCodes)
+    private static List<string> LanguagesForMovie(List<string> languageCodes)
     {
         CultureInfo[] allCultures = CultureInfo.GetCultures(CultureTypes.NeutralCultures);
 
@@ -52,6 +52,7 @@ internal static class Mapper
                     ci => string.Equals(ci.ThreeLetterISOLanguageName, lang, StringComparison.OrdinalIgnoreCase)))
             .Sequence()
             .Flatten()
+            .Map(ci => ci.EnglishName)
             .ToList();
     }
 

ErsatzTV.Application/Movies/MovieViewModel.cs

@@ -12,7 +12,7 @@ public record MovieViewModel(
     List<string> Tags,
     List<string> Studios,
     List<string> ContentRatings,
-    List<CultureInfo> Languages,
+    List<string> Languages,
     List<ActorCardViewModel> Actors,
     List<string> Directors,
     List<string> Writers,

ErsatzTV.Application/Search/Queries/QuerySearchIndexMoviesHandler.cs

@@ -4,6 +4,7 @@ using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Interfaces.Repositories;
 using ErsatzTV.Core.Interfaces.Search;
 using ErsatzTV.Core.Search;
+using LanguageExt.UnsafeValueAccess;
 using static ErsatzTV.Application.MediaCards.Mapper;
 
 namespace ErsatzTV.Application.Search;

ErsatzTV.Core/Interfaces/Search/ISearchIndex.cs

@@ -25,6 +25,6 @@ public interface ISearchIndex : IDisposable
         List<MediaItem> items);
 
     Task<Unit> RemoveItems(IEnumerable<int> ids);
-    Task<SearchResult> Search(IClient client, string query, int skip, int limit, string searchField = "");
+    Task<SearchResult> Search(IClient client, string query, int skip, int limit);
     void Commit();
 }

ErsatzTV.Core/Search/SearchResult.cs

@@ -2,5 +2,5 @@
 
 public record SearchResult(List<SearchItem> Items, int TotalCount)
 {
-    public Option<SearchPageMap> PageMap { get; set; }
+    public SearchPageMap PageMap { get; set; }
 }

ErsatzTV.Infrastructure/ErsatzTV.Infrastructure.csproj

@@ -37,4 +37,6 @@
     </ItemGroup>
 
 
+
+
 </Project>

ErsatzTV.Infrastructure/Search/CustomMultiFieldQueryParser.cs

@@ -1,4 +1,5 @@
-using Lucene.Net.Analysis;
+using ErsatzTV.Core;
+using Lucene.Net.Analysis;
 using Lucene.Net.Index;
 using Lucene.Net.QueryParsers.Classic;
 using Lucene.Net.Search;
@@ -9,6 +10,16 @@ namespace ErsatzTV.Infrastructure.Search;
 
 public class CustomMultiFieldQueryParser : MultiFieldQueryParser
 {
+    private static readonly List<string> NumericFields = new()
+    {
+        LuceneSearchIndex.MinutesField,
+        LuceneSearchIndex.HeightField,
+        LuceneSearchIndex.WidthField,
+        LuceneSearchIndex.SeasonNumberField,
+        LuceneSearchIndex.EpisodeNumberField,
+        LuceneSearchIndex.VideoBitDepthField
+    };
+
     public CustomMultiFieldQueryParser(
         LuceneVersion matchVersion,
         string[] fields,
@@ -32,7 +43,7 @@ public class CustomMultiFieldQueryParser : MultiFieldQueryParser
             return base.GetWildcardQuery(LuceneSearchIndex.ReleaseDateField, todayString);
         }
 
-        if (CustomQueryParser.NumericFields.Contains(field) && int.TryParse(queryText, out int val))
+        if (NumericFields.Contains(field) && int.TryParse(queryText, out int val))
         {
             var bytesRef = new BytesRef();
             NumericUtils.Int32ToPrefixCoded(val, 0, bytesRef);
@@ -44,7 +55,7 @@ public class CustomMultiFieldQueryParser : MultiFieldQueryParser
 
     protected override Query GetFieldQuery(string field, string queryText, int slop)
     {
-        if (field == "released_inthelast" && CustomQueryParser.ParseStart(queryText, out DateTime start))
+        if (field == "released_inthelast" && ParseStart(queryText, out DateTime start))
         {
             var todayString = DateTime.UtcNow.ToString("yyyyMMdd");
             var dateString = start.ToString("yyyyMMdd");
@@ -52,14 +63,14 @@ public class CustomMultiFieldQueryParser : MultiFieldQueryParser
             return base.GetRangeQuery(LuceneSearchIndex.ReleaseDateField, dateString, todayString, true, true);
         }
 
-        if (field == "released_notinthelast" && CustomQueryParser.ParseStart(queryText, out DateTime finish))
+        if (field == "released_notinthelast" && ParseStart(queryText, out DateTime finish))
         {
             var dateString = finish.ToString("yyyyMMdd");
 
             return base.GetRangeQuery(LuceneSearchIndex.ReleaseDateField, "00000000", dateString, false, false);
         }
 
-        if (field == "added_inthelast" && CustomQueryParser.ParseStart(queryText, out DateTime addedStart))
+        if (field == "added_inthelast" && ParseStart(queryText, out DateTime addedStart))
         {
             var todayString = DateTime.UtcNow.ToString("yyyyMMdd");
             var dateString = addedStart.ToString("yyyyMMdd");
@@ -67,7 +78,7 @@ public class CustomMultiFieldQueryParser : MultiFieldQueryParser
             return base.GetRangeQuery(LuceneSearchIndex.AddedDateField, dateString, todayString, true, true);
         }
 
-        if (field == "added_notinthelast" && CustomQueryParser.ParseStart(queryText, out DateTime addedFinish))
+        if (field == "added_notinthelast" && ParseStart(queryText, out DateTime addedFinish))
         {
             var dateString = addedFinish.ToString("yyyyMMdd");
 
@@ -84,7 +95,7 @@ public class CustomMultiFieldQueryParser : MultiFieldQueryParser
         bool startInclusive,
         bool endInclusive)
     {
-        if (CustomQueryParser.NumericFields.Contains(field))
+        if (NumericFields.Contains(field))
         {
             if (part1 is null or "*" && int.TryParse(part2, out int max1))
             {
@@ -107,4 +118,45 @@ public class CustomMultiFieldQueryParser : MultiFieldQueryParser
 
         return base.GetRangeQuery(field, part1, part2, startInclusive, endInclusive);
     }
+    
+    private static bool ParseStart(string text, out DateTime start)
+    {
+        start = SystemTime.MinValueUtc;
+
+        try
+        {
+            if (int.TryParse(text.Split(" ")[0], out int number))
+            {
+                if (text.Contains("day"))
+                {
+                    start = DateTime.Today.AddDays(number * -1);
+                    return true;
+                }
+
+                if (text.Contains("week"))
+                {
+                    start = DateTime.Today.AddDays(number * -7);
+                    return true;
+                }
+
+                if (text.Contains("month"))
+                {
+                    start = DateTime.Today.AddMonths(number * -1);
+                    return true;
+                }
+
+                if (text.Contains("year"))
+                {
+                    start = DateTime.Today.AddYears(number * -1);
+                    return true;
+                }
+            }
+        }
+        catch
+        {
+            // do nothing
+        }
+
+        return false;
+    }
 }

ErsatzTV.Infrastructure/Search/CustomQueryParser.cs

@@ -1,159 +0,0 @@
-using ErsatzTV.Core;
-using Lucene.Net.Analysis;
-using Lucene.Net.Index;
-using Lucene.Net.QueryParsers.Classic;
-using Lucene.Net.Search;
-using Lucene.Net.Util;
-using Query = Lucene.Net.Search.Query;
-
-namespace ErsatzTV.Infrastructure.Search;
-
-public class CustomQueryParser : QueryParser
-{
-    internal static readonly List<string> NumericFields = new()
-    {
-        LuceneSearchIndex.MinutesField,
-        LuceneSearchIndex.HeightField,
-        LuceneSearchIndex.WidthField,
-        LuceneSearchIndex.SeasonNumberField,
-        LuceneSearchIndex.EpisodeNumberField,
-        LuceneSearchIndex.VideoBitDepthField
-    };
-
-    public CustomQueryParser(LuceneVersion matchVersion, string f, Analyzer a) : base(matchVersion, f, a)
-    {
-    }
-
-    protected internal CustomQueryParser(ICharStream stream) : base(stream)
-    {
-    }
-
-    protected CustomQueryParser(QueryParserTokenManager tm) : base(tm)
-    {
-    }
-
-    protected override Query GetFieldQuery(string field, string queryText, bool quoted)
-    {
-        if (field == "released_onthisday")
-        {
-            var todayString = DateTime.Today.ToString("*MMdd");
-            return base.GetWildcardQuery(LuceneSearchIndex.ReleaseDateField, todayString);
-        }
-
-        if (NumericFields.Contains(field) && int.TryParse(queryText, out int val))
-        {
-            var bytesRef = new BytesRef();
-            NumericUtils.Int32ToPrefixCoded(val, 0, bytesRef);
-            return NewTermQuery(new Term(field, bytesRef));
-        }
-
-        return base.GetFieldQuery(field, queryText, quoted);
-    }
-
-    protected override Query GetFieldQuery(string field, string queryText, int slop)
-    {
-        if (field == "released_inthelast" && ParseStart(queryText, out DateTime start))
-        {
-            var todayString = DateTime.UtcNow.ToString("yyyyMMdd");
-            var dateString = start.ToString("yyyyMMdd");
-
-            return base.GetRangeQuery(LuceneSearchIndex.ReleaseDateField, dateString, todayString, true, true);
-        }
-
-        if (field == "released_notinthelast" && ParseStart(queryText, out DateTime finish))
-        {
-            var dateString = finish.ToString("yyyyMMdd");
-
-            return base.GetRangeQuery(LuceneSearchIndex.ReleaseDateField, "00000000", dateString, false, false);
-        }
-
-        if (field == "added_inthelast" && ParseStart(queryText, out DateTime addedStart))
-        {
-            var todayString = DateTime.UtcNow.ToString("yyyyMMdd");
-            var dateString = addedStart.ToString("yyyyMMdd");
-
-            return base.GetRangeQuery(LuceneSearchIndex.AddedDateField, dateString, todayString, true, true);
-        }
-
-        if (field == "added_notinthelast" && ParseStart(queryText, out DateTime addedFinish))
-        {
-            var dateString = addedFinish.ToString("yyyyMMdd");
-
-            return base.GetRangeQuery(LuceneSearchIndex.AddedDateField, "00000000", dateString, false, false);
-        }
-
-        return base.GetFieldQuery(field, queryText, slop);
-    }
-
-    protected override Query GetRangeQuery(
-        string field,
-        string part1,
-        string part2,
-        bool startInclusive,
-        bool endInclusive)
-    {
-        if (NumericFields.Contains(field))
-        {
-            if (part1 is null or "*" && int.TryParse(part2, out int max1))
-            {
-                return NumericRangeQuery.NewInt32Range(field, null, max1, startInclusive, endInclusive);
-            }
-
-            if (int.TryParse(part1, out int min))
-            {
-                if (part2 is null or "*")
-                {
-                    return NumericRangeQuery.NewInt32Range(field, min, null, startInclusive, endInclusive);
-                }
-
-                if (int.TryParse(part2, out int max))
-                {
-                    return NumericRangeQuery.NewInt32Range(field, min, max, startInclusive, endInclusive);
-                }
-            }
-        }
-
-        return base.GetRangeQuery(field, part1, part2, startInclusive, endInclusive);
-    }
-
-    internal static bool ParseStart(string text, out DateTime start)
-    {
-        start = SystemTime.MinValueUtc;
-
-        try
-        {
-            if (int.TryParse(text.Split(" ")[0], out int number))
-            {
-                if (text.Contains("day"))
-                {
-                    start = DateTime.Today.AddDays(number * -1);
-                    return true;
-                }
-
-                if (text.Contains("week"))
-                {
-                    start = DateTime.Today.AddDays(number * -7);
-                    return true;
-                }
-
-                if (text.Contains("month"))
-                {
-                    start = DateTime.Today.AddMonths(number * -1);
-                    return true;
-                }
-
-                if (text.Contains("year"))
-                {
-                    start = DateTime.Today.AddYears(number * -1);
-                    return true;
-                }
-            }
-        }
-        catch
-        {
-            // do nothing
-        }
-
-        return false;
-    }
-}

ErsatzTV.Infrastructure/Search/ElasticSearchIndex.cs

@@ -15,6 +15,7 @@ using ErsatzTV.Infrastructure.Search.Models;
 using Microsoft.Extensions.Logging;
 using ExistsResponse = Elastic.Clients.Elasticsearch.IndexManagement.ExistsResponse;
 using MediaStream = ErsatzTV.Core.Domain.MediaStream;
+using Query = Lucene.Net.Search.Query;
 
 namespace ErsatzTV.Infrastructure.Search;
 
@@ -152,17 +153,20 @@ public class ElasticSearchIndex : ISearchIndex
         return Unit.Default;
     }
 
-    public async Task<SearchResult> Search(IClient client, string query, int skip, int limit, string searchField = "")
+    public async Task<SearchResult> Search(IClient client, string query, int skip, int limit)
     {
         var items = new List<MinimalElasticSearchItem>();
         var totalCount = 0;
 
+        Query parsedQuery = LuceneSearchIndex.ParseQuery(query);
+        
         SearchResponse<MinimalElasticSearchItem> response = await _client.SearchAsync<MinimalElasticSearchItem>(
             s => s.Index(IndexName)
                 .Sort(ss => ss.Field(f => f.SortTitle, fs => fs.Order(SortOrder.Asc)))
                 .From(skip)
                 .Size(limit)
-                .QueryLuceneSyntax(query));
+                .QueryLuceneSyntax(parsedQuery.ToString()));
+
         if (response.IsValidResponse)
         {
             items.AddRange(response.Documents);
@@ -792,7 +796,7 @@ public class ElasticSearchIndex : ISearchIndex
         return result;
     }
 
-    private async Task<Option<SearchPageMap>> GetSearchPageMap(string query, int limit)
+    private async Task<SearchPageMap> GetSearchPageMap(string query, int limit)
     {
         SearchResponse<MinimalElasticSearchItem> response = await _client.SearchAsync<MinimalElasticSearchItem>(
             s => s.Index(IndexName)
@@ -803,7 +807,7 @@ public class ElasticSearchIndex : ISearchIndex
 
         if (!response.IsValidResponse)
         {
-            return Option<SearchPageMap>.None;
+            return null;
         }
 
         var letters = new List<char>

ErsatzTV.Infrastructure/Search/LuceneSearchIndex.cs

@@ -189,14 +189,13 @@ public sealed class LuceneSearchIndex : ISearchIndex
         return Task.FromResult(Unit.Default);
     }
 
-    public Task<SearchResult> Search(IClient client, string searchQuery, int skip, int limit, string searchField = "")
+    public Task<SearchResult> Search(IClient client, string searchQuery, int skip, int limit)
     {
         var metadata = new Dictionary<string, string>
         {
             { "searchQuery", searchQuery },
             { "skip", skip.ToString() },
-            { "limit", limit.ToString() },
+            { "limit", limit.ToString() }
-            { "searchField", searchField }
         };
 
         client?.Breadcrumbs?.Leave("SearchIndex.Search", BreadcrumbType.State, metadata);
@@ -210,18 +209,7 @@ public sealed class LuceneSearchIndex : ISearchIndex
         using DirectoryReader reader = _writer.GetReader(true);
         var searcher = new IndexSearcher(reader);
         int hitsLimit = limit == 0 ? searcher.IndexReader.MaxDoc : skip + limit;
-        using var analyzer = new StandardAnalyzer(AppLuceneVersion);
+        Query query = ParseQuery(searchQuery);
-        var customAnalyzers = new Dictionary<string, Analyzer>
-        {
-            { ContentRatingField, new KeywordAnalyzer() },
-            { StateField, new KeywordAnalyzer() }
-        };
-        using var analyzerWrapper = new PerFieldAnalyzerWrapper(analyzer, customAnalyzers);
-        QueryParser parser = !string.IsNullOrWhiteSpace(searchField)
-            ? new CustomQueryParser(AppLuceneVersion, searchField, analyzerWrapper)
-            : new CustomMultiFieldQueryParser(AppLuceneVersion, new[] { TitleField }, analyzerWrapper);
-        parser.AllowLeadingWildcard = true;
-        Query query = ParseQuery(searchQuery, parser);
         // TODO: figure out if this is actually needed
         // var filter = new DuplicateFilter(TitleAndYearField);
         var sort = new Sort(new SortField(SortTitleField, SortFieldType.STRING));
@@ -350,7 +338,7 @@ public sealed class LuceneSearchIndex : ISearchIndex
         }
     }
 
-    private static Option<SearchPageMap> GetSearchPageMap(
+    private static SearchPageMap GetSearchPageMap(
         IndexSearcher searcher,
         Query query,
         DuplicateFilter filter,
@@ -1145,6 +1133,20 @@ public sealed class LuceneSearchIndex : ISearchIndex
         doc.Get(TypeField),
         Convert.ToInt32(doc.Get(IdField)));
 
+    internal static Query ParseQuery(string query)
+    {
+        using var analyzer = new StandardAnalyzer(AppLuceneVersion);
+        var customAnalyzers = new Dictionary<string, Analyzer>
+        {
+            { ContentRatingField, new KeywordAnalyzer() },
+            { StateField, new KeywordAnalyzer() }
+        };
+        using var analyzerWrapper = new PerFieldAnalyzerWrapper(analyzer, customAnalyzers);
+        QueryParser parser = new CustomMultiFieldQueryParser(AppLuceneVersion, new[] { TitleField }, analyzerWrapper);
+        parser.AllowLeadingWildcard = true;
+        return ParseQuery(query, parser);
+    }
+
     private static Query ParseQuery(string searchQuery, QueryParser parser)
     {
         Query query;

ErsatzTV/Pages/ArtistList.razor

@@ -64,9 +64,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/music/artists"
                Query="@_query"/>
 }
@@ -77,7 +77,7 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private ArtistCardResultsViewModel _data = new(0, new List<ArtistCardViewModel>(), None);
+    private ArtistCardResultsViewModel _data = new(0, new List<ArtistCardViewModel>(), null);
     private string _query;
 
     protected override async Task OnParametersSetAsync()

ErsatzTV/Pages/ChannelEditor.razor

@@ -7,7 +7,6 @@
 @using ErsatzTV.Application.MediaItems
 @using ErsatzTV.Application.Templates
 @using ErsatzTV.Application.Watermarks
-@using System.Globalization
 @using ErsatzTV.Core.Domain.Filler
 @using ErsatzTV.Application.Channels
 @implements IDisposable
@@ -50,7 +49,7 @@
                                For="@(() => _model.PreferredAudioLanguageCode)"
                                Clearable="true">
                         <MudSelectItem Value="@((string)null)">(none)</MudSelectItem>
-                        @foreach (CultureInfo culture in _availableCultures)
+                        @foreach (LanguageCodeViewModel culture in _availableCultures)
                         {
                             <MudSelectItem Value="@culture.ThreeLetterISOLanguageName">@culture.EnglishName</MudSelectItem>
                         }
@@ -62,7 +61,7 @@
                                For="@(() => _model.PreferredSubtitleLanguageCode)"
                                Clearable="true">
                         <MudSelectItem Value="@((string)null)">(none)</MudSelectItem>
-                        @foreach (CultureInfo culture in _availableCultures)
+                        @foreach (LanguageCodeViewModel culture in _availableCultures)
                         {
                             <MudSelectItem Value="@culture.ThreeLetterISOLanguageName">@culture.EnglishName</MudSelectItem>
                         }
@@ -148,7 +147,7 @@
     private ValidationMessageStore _messageStore;
 
     private List<FFmpegProfileViewModel> _ffmpegProfiles;
-    private List<CultureInfo> _availableCultures;
+    private List<LanguageCodeViewModel> _availableCultures;
     private List<WatermarkViewModel> _watermarks;
     private List<FillerPresetViewModel> _fillerPresets;
     private List<string> _musicVideoCreditsTemplates;

ErsatzTV/Pages/EpisodeList.razor

@@ -64,9 +64,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/tv/episodes"
                Query="@_query"/>
 }
@@ -77,7 +77,7 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private TelevisionEpisodeCardResultsViewModel _data = new(0, new List<TelevisionEpisodeCardViewModel>(), None);
+    private TelevisionEpisodeCardResultsViewModel _data = new(0, new List<TelevisionEpisodeCardViewModel>(), null);
     private string _query;
 
     protected override async Task OnParametersSetAsync()

ErsatzTV/Pages/Movie.razor

@@ -5,12 +5,14 @@
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaItems
 @using ErsatzTV.Application.MediaCards
+@using LanguageExt.UnsafeValueAccess
 @implements IDisposable
-@inject IMediator _mediator
+@inject IMediator Mediator
-@inject IDialogService _dialog
+@inject IDialogService Dialog
-@inject NavigationManager _navigationManager
+@inject NavigationManager NavigationManager
-@inject ILogger<Movie> _logger
+@inject ILogger<Movie> Logger
-@inject ISnackbar _snackbar
+@inject ISnackbar Snackbar
+@inject PersistentComponentState ApplicationState
 
 <MudContainer MaxWidth="MaxWidth.False" Style="padding: 0" Class="fanart-container">
     <div class="fanart-tint"></div>
@@ -129,11 +131,11 @@
             {
                 <div style="display: flex; flex-direction: row; flex-wrap: wrap">
                     <MudText GutterBottom="true">Languages:&nbsp;</MudText>
-                    <MudLink Href="@(@$"language:""{_sortedLanguages.Head().EnglishName.ToLowerInvariant()}""".GetRelativeSearchQuery())">@_sortedLanguages.Head().EnglishName</MudLink>
+                    <MudLink Href="@(@$"language:""{_sortedLanguages.Head().ToLowerInvariant()}""".GetRelativeSearchQuery())">@_sortedLanguages.Head()</MudLink>
-                    @foreach (CultureInfo language in _sortedLanguages.Skip(1))
+                    @foreach (string language in _sortedLanguages.Skip(1))
                     {
                         <MudText>,&nbsp;</MudText>
-                        <MudLink Href="@(@$"language:""{language.EnglishName.ToLowerInvariant()}""".GetRelativeSearchQuery())">@language.EnglishName</MudLink>
+                        <MudLink Href="@(@$"language:""{language.ToLowerInvariant()}""".GetRelativeSearchQuery())">@language</MudLink>
                     }
                 </div>
             }
@@ -217,13 +219,14 @@
 
 @code {
     private readonly CancellationTokenSource _cts = new();
+    private PersistingComponentStateSubscription _persistingSubscription;
 
     [Parameter]
     public int MovieId { get; set; }
 
     private MovieViewModel _movie;
     private List<string> _sortedContentRatings = new();
-    private List<CultureInfo> _sortedLanguages = new();
+    private List<string> _sortedLanguages = new();
     private List<string> _sortedDirectors = new();
     private List<string> _sortedWriters = new();
     private List<string> _sortedStudios = new();
@@ -232,54 +235,81 @@
 
     public void Dispose()
     {
+        _persistingSubscription.Dispose();
+
         _cts.Cancel();
         _cts.Dispose();
     }
 
-    protected override Task OnParametersSetAsync() => RefreshData();
+    protected override Task OnInitializedAsync()
+    {
+        _persistingSubscription = ApplicationState.RegisterOnPersisting(PersistData);
         
-    private async Task RefreshData() =>
+        return base.OnInitializedAsync();
-        await _mediator.Send(new GetMovieById(MovieId), _cts.Token).IfSomeAsync(vm =>
+    }
-        {
+
-            _movie = vm;
+    protected override async Task OnParametersSetAsync()
-            _sortedContentRatings = _movie.ContentRatings.OrderBy(cr => cr).ToList();
+    {
-            _sortedLanguages = _movie.Languages.OrderBy(ci => ci.EnglishName).ToList();
+        if (!ApplicationState.TryTakeFromJson("_movie", out MovieViewModel restored))
-            _sortedStudios = _movie.Studios.OrderBy(s => s).ToList();
+        {
-            _sortedGenres = _movie.Genres.OrderBy(g => g).ToList();
+            _movie = await RefreshData();
-            _sortedTags = _movie.Tags.OrderBy(t => t).ToList();
+        }
-            _sortedDirectors = _movie.Directors.OrderBy(d => d).ToList();
+        else
-            _sortedWriters = _movie.Writers.OrderBy(w => w).ToList();
+        {
-        });
+            _movie = restored;
+        }
+
+        _sortedContentRatings = _movie?.ContentRatings.OrderBy(cr => cr).ToList();
+        _sortedLanguages = _movie?.Languages.OrderBy(l => l).ToList();
+        _sortedStudios = _movie?.Studios.OrderBy(s => s).ToList();
+        _sortedGenres = _movie?.Genres.OrderBy(g => g).ToList();
+        _sortedTags = _movie?.Tags.OrderBy(t => t).ToList();
+        _sortedDirectors = _movie?.Directors.OrderBy(d => d).ToList();
+        _sortedWriters = _movie?.Writers.OrderBy(w => w).ToList();
+    }
+    
+    private Task PersistData()
+    {
+        ApplicationState.PersistAsJson("_movie", _movie);
+
+        return Task.CompletedTask;
+    }
+
+    private async Task<MovieViewModel> RefreshData()
+    {
+        Option<MovieViewModel> vm = await Mediator.Send(new GetMovieById(MovieId), _cts.Token);
+        return vm.IsSome ? vm.ValueUnsafe() : null;
+    }
 
     private async Task AddToCollection()
     {
         var parameters = new DialogParameters { { "EntityType", "movie" }, { "EntityName", _movie.Title } };
         var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraSmall };
 
-        IDialogReference dialog = await _dialog.ShowAsync<AddToCollectionDialog>("Add To Collection", parameters, options);
+        IDialogReference dialog = await Dialog.ShowAsync<AddToCollectionDialog>("Add To Collection", parameters, options);
         DialogResult result = await dialog.Result;
         if (!result.Canceled && result.Data is MediaCollectionViewModel collection)
         {
-            await _mediator.Send(new AddMovieToCollection(collection.Id, MovieId), _cts.Token);
+            await Mediator.Send(new AddMovieToCollection(collection.Id, MovieId), _cts.Token);
-            _navigationManager.NavigateTo($"media/collections/{collection.Id}");
+            NavigationManager.NavigateTo($"media/collections/{collection.Id}");
         }
     }
 
     private async Task ShowInfo()
     {
-        Either<BaseError, MediaItemInfo> maybeInfo = await _mediator.Send(new GetMediaItemInfo(MovieId));
+        Either<BaseError, MediaItemInfo> maybeInfo = await Mediator.Send(new GetMediaItemInfo(MovieId));
 
         foreach (BaseError error in maybeInfo.LeftToSeq())
         {
-            _snackbar.Add("Unexpected error loading media info");
+            Snackbar.Add("Unexpected error loading media info");
-            _logger.LogError("Unexpected error loading media info: {Error}", error.Value);
+            Logger.LogError("Unexpected error loading media info: {Error}", error.Value);
         }
 
         foreach (MediaItemInfo info in maybeInfo.RightToSeq())
         {
             var parameters = new DialogParameters { { "MediaItemInfo", info } };
             var options = new DialogOptions { CloseButton = true, CloseOnEscapeKey = true, MaxWidth = MaxWidth.Medium, FullWidth = true };
-            IDialogReference dialog = await _dialog.ShowAsync<MediaItemInfoDialog>(_movie.Title, parameters, options);
+            IDialogReference dialog = await Dialog.ShowAsync<MediaItemInfoDialog>(_movie.Title, parameters, options);
             DialogResult _ = await dialog.Result;
         }
     }

ErsatzTV/Pages/MovieList.razor

@@ -1,12 +1,13 @@
 @page "/media/movies"
 @page "/media/movies/page/{PageNumber:int}"
 @using ErsatzTV.Extensions
-@using LanguageExt.UnsafeValueAccess
 @using ErsatzTV.Application.MediaCards
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.Search
 @inherits MultiSelectBase<MovieList>
 @inject NavigationManager NavigationManager
+@inject PersistentComponentState ApplicationState
+@implements IDisposable
 
 <MudPaper Square="true" Style="display: flex; height: 64px; left: 240px; padding: 0; position: fixed; right: 0; z-index: 100;">
     <div style="display: flex; flex-direction: row; margin-bottom: auto; margin-top: auto; width: 100%" class="ml-6 mr-6">
@@ -62,9 +63,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/movies"
                Query="@_query"/>
 }
@@ -75,8 +76,17 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private MovieCardResultsViewModel _data = new(0, new List<MovieCardViewModel>(), None);
+    private MovieCardResultsViewModel _data = new(0, new List<MovieCardViewModel>(), null);
     private string _query;
+    private PersistingComponentStateSubscription _persistingSubscription;
+
+    protected override Task OnInitializedAsync()
+    {
+        _persistingSubscription = ApplicationState.RegisterOnPersisting(PersistData);
+        _query = NavigationManager.Uri.GetSearchQuery();
+
+        return base.OnInitializedAsync();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
@@ -85,15 +95,33 @@
             PageNumber = 1;
         }
 
-        _query = NavigationManager.Uri.GetSearchQuery();
+        if (!ApplicationState.TryTakeFromJson("_data", out MovieCardResultsViewModel restored))
+        {
+            _data = await RefreshData();
+        }
+        else
+        {
+            _data = restored;
+        }
+    }
+    
+    private Task PersistData()
+    {
+        ApplicationState.PersistAsJson("_data", _data);
+
+        return Task.CompletedTask;
+    }
     
-        await RefreshData();
+    void IDisposable.Dispose()
+    {
+        _persistingSubscription.Dispose();
+        base.Dispose();
     }
 
-    protected override async Task RefreshData()
+    protected override async Task<MovieCardResultsViewModel> RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:movie" : $"type:movie AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexMovies(searchQuery, PageNumber, PageSize), CancellationToken);
+        return await Mediator.Send(new QuerySearchIndexMovies(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()

ErsatzTV/Pages/MusicVideoList.razor

@@ -64,9 +64,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/music/videos"
                Query="@_query"/>
 }
@@ -77,7 +77,7 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private MusicVideoCardResultsViewModel _data = new(0, new List<MusicVideoCardViewModel>(), None);
+    private MusicVideoCardResultsViewModel _data = new(0, new List<MusicVideoCardViewModel>(), null);
     private string _query;
 
     protected override async Task OnParametersSetAsync()

ErsatzTV/Pages/OtherVideoList.razor

@@ -64,9 +64,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/other/videos"
                Query="@_query"/>
 }
@@ -77,7 +77,7 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private OtherVideoCardResultsViewModel _data = new(0, new List<OtherVideoCardViewModel>(), None);
+    private OtherVideoCardResultsViewModel _data = new(0, new List<OtherVideoCardViewModel>(), null);
     private string _query;
 
     protected override async Task OnParametersSetAsync()

ErsatzTV/Pages/ScheduleItemsEditor.razor

@@ -5,7 +5,6 @@
 @using ErsatzTV.Application.ProgramSchedules
 @using ErsatzTV.Application.Search
 @using ErsatzTV.Application.Watermarks
-@using System.Globalization
 @using ErsatzTV.Core.Domain.Filler
 @implements IDisposable
 @inject NavigationManager NavigationManager
@@ -305,7 +304,7 @@
                                    For="@(() => _selectedItem.PreferredAudioLanguageCode)"
                                    Clearable="true">
                             <MudSelectItem Value="@((string)null)">(none)</MudSelectItem>
-                            @foreach (CultureInfo culture in _availableCultures)
+                            @foreach (LanguageCodeViewModel culture in _availableCultures)
                             {
                                 <MudSelectItem Value="@culture.ThreeLetterISOLanguageName">@culture.EnglishName</MudSelectItem>
                             }
@@ -317,7 +316,7 @@
                                    For="@(() => _selectedItem.PreferredSubtitleLanguageCode)"
                                    Clearable="true">
                             <MudSelectItem Value="@((string)null)">(none)</MudSelectItem>
-                            @foreach (CultureInfo culture in _availableCultures)
+                            @foreach (LanguageCodeViewModel culture in _availableCultures)
                             {
                                 <MudSelectItem Value="@culture.ThreeLetterISOLanguageName">@culture.EnglishName</MudSelectItem>
                             }
@@ -345,7 +344,7 @@
     private ProgramScheduleItemsEditViewModel _schedule;
     private List<FillerPresetViewModel> _fillerPresets;
     private List<WatermarkViewModel> _watermarks;
-    private List<CultureInfo> _availableCultures;
+    private List<LanguageCodeViewModel> _availableCultures;
 
     private ProgramScheduleItemEditViewModel _selectedItem;
 
@@ -355,7 +354,11 @@
         _cts.Dispose();
     }
 
-    protected override async Task OnParametersSetAsync() => await LoadScheduleItems();
+    protected override async Task OnParametersSetAsync()
+    {
+        Logger.LogInformation("Loading schedule items");
+        await LoadScheduleItems();
+    }
 
     private async Task LoadScheduleItems()
     {

ErsatzTV/Pages/Search.razor

@@ -6,6 +6,8 @@
 @inherits MultiSelectBase<Search>
 @inject NavigationManager _navigationManager
 @inject ChannelWriter<IBackgroundServiceRequest> _channel
+@inject PersistentComponentState ApplicationState
+@implements IDisposable
 
 <MudPaper Square="true" Style="display: flex; height: 64px; left: 240px; padding: 0; position: fixed; right: 0; z-index: 100;">
     <div style="display: flex; flex-direction: row; margin-bottom: auto; margin-top: auto; width: 100%" class="ml-6 mr-6">
@@ -324,21 +326,107 @@
     private OtherVideoCardResultsViewModel _otherVideos;
     private SongCardResultsViewModel _songs;
     private ArtistCardResultsViewModel _artists;
+    private PersistingComponentStateSubscription _persistingSubscription;
 
     protected override async Task OnInitializedAsync()
     {
+        _persistingSubscription = ApplicationState.RegisterOnPersisting(PersistData);
+
         _query = _navigationManager.Uri.GetSearchQuery();
         if (!string.IsNullOrWhiteSpace(_query))
+        {
+            if (!ApplicationState.TryTakeFromJson("_movies", out MovieCardResultsViewModel restoredMovies))
             {
                 _movies = await Mediator.Send(new QuerySearchIndexMovies($"type:movie AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _movies = restoredMovies;
+            }
+
+            if (!ApplicationState.TryTakeFromJson("_shows", out TelevisionShowCardResultsViewModel restoredShows))
+            {
                 _shows = await Mediator.Send(new QuerySearchIndexShows($"type:show AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _shows = restoredShows;
+            }
+
+            if (!ApplicationState.TryTakeFromJson("_seasons", out TelevisionSeasonCardResultsViewModel restoredSeasons))
+            {
                 _seasons = await Mediator.Send(new QuerySearchIndexSeasons($"type:season AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _seasons = restoredSeasons;
+            }
+
+            if (!ApplicationState.TryTakeFromJson("_episodes", out TelevisionEpisodeCardResultsViewModel restoredEpisodes))
+            {
                 _episodes = await Mediator.Send(new QuerySearchIndexEpisodes($"type:episode AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _episodes = restoredEpisodes;
+            }
+            
+            if (!ApplicationState.TryTakeFromJson("_musicVideos", out MusicVideoCardResultsViewModel restoredMusicVideos))
+            {
                 _musicVideos = await Mediator.Send(new QuerySearchIndexMusicVideos($"type:music_video AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _musicVideos = restoredMusicVideos;
+            }
+            
+            if (!ApplicationState.TryTakeFromJson("_otherVideos", out OtherVideoCardResultsViewModel restoredOtherVideos))
+            {
                 _otherVideos = await Mediator.Send(new QuerySearchIndexOtherVideos($"type:other_video AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _otherVideos = restoredOtherVideos;
+            }
+            
+            if (!ApplicationState.TryTakeFromJson("_songs", out SongCardResultsViewModel restoredSongs))
+            {
                 _songs = await Mediator.Send(new QuerySearchIndexSongs($"type:song AND ({_query})", 1, 50), CancellationToken);
+            }
+            else
+            {
+                _songs = restoredSongs;
+            }
+            
+            if (!ApplicationState.TryTakeFromJson("_artists", out ArtistCardResultsViewModel restoredArtists))
+            {
                 _artists = await Mediator.Send(new QuerySearchIndexArtists($"type:artist AND ({_query})", 1, 50), CancellationToken);
             }
+            else
+            {
+                _artists = restoredArtists;
+            }
+        }
+    }
+    
+    private Task PersistData()
+    {
+        ApplicationState.PersistAsJson("_movies", _movies);
+        ApplicationState.PersistAsJson("_shows", _shows);
+        ApplicationState.PersistAsJson("_seasons", _seasons);
+        ApplicationState.PersistAsJson("_episodes", _episodes);
+        ApplicationState.PersistAsJson("_musicVideos", _musicVideos);
+        ApplicationState.PersistAsJson("_otherVideos", _otherVideos);
+        ApplicationState.PersistAsJson("_songs", _songs);
+        ApplicationState.PersistAsJson("_artists", _artists);
+
+        return Task.CompletedTask;
+    }
+    
+    void IDisposable.Dispose()
+    {
+        _persistingSubscription.Dispose(); 
+        base.Dispose();
     }
 
     private void SelectClicked(MediaCardViewModel card, MouseEventArgs e)

ErsatzTV/Pages/Settings.razor

@@ -39,7 +39,7 @@
                 </MudSelect>
             </MudElement>
             <MudSelect Class="mt-3" Label="Preferred Audio Language" @bind-Value="_ffmpegSettings.PreferredAudioLanguageCode" For="@(() => _ffmpegSettings.PreferredAudioLanguageCode)" Required="true" RequiredError="Preferred Language Code is required!">
-                @foreach (CultureInfo culture in _availableCultures)
+                @foreach (LanguageCodeViewModel culture in _availableCultures)
                 {
                     <MudSelectItem Value="@culture.ThreeLetterISOLanguageName">@culture.EnglishName</MudSelectItem>
                 }
@@ -254,7 +254,7 @@
     private bool _playoutSuccess;
     private List<FFmpegProfileViewModel> _ffmpegProfiles;
     private FFmpegSettingsViewModel _ffmpegSettings;
-    private List<CultureInfo> _availableCultures;
+    private List<LanguageCodeViewModel> _availableCultures;
     private List<WatermarkViewModel> _watermarks;
     private List<FillerPresetViewModel> _fillerPresets;
     private List<ResolutionViewModel> _customResolutions;

ErsatzTV/Pages/SongList.razor

@@ -64,9 +64,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/music/songs"
                Query="@_query"/>
 }
@@ -77,7 +77,7 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private SongCardResultsViewModel _data = new(0, new List<SongCardViewModel>(), None);
+    private SongCardResultsViewModel _data = new(0, new List<SongCardViewModel>(), null);
     private string _query;
 
     protected override async Task OnParametersSetAsync()

ErsatzTV/Pages/TelevisionSeasonSearchResults.razor

@@ -63,9 +63,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/tv/seasons"
                Query="@_query"/>
 }
@@ -76,7 +76,7 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private TelevisionSeasonCardResultsViewModel _data = new(0, new List<TelevisionSeasonCardViewModel>(), None);
+    private TelevisionSeasonCardResultsViewModel _data = new(0, new List<TelevisionSeasonCardViewModel>(), null);
     private string _query;
 
     protected override async Task OnParametersSetAsync()

ErsatzTV/Pages/TelevisionShowList.razor

@@ -1,13 +1,13 @@
 @page "/media/tv/shows"
 @page "/media/tv/shows/page/{PageNumber:int}"
 @using ErsatzTV.Extensions
-@using LanguageExt.UnsafeValueAccess
 @using ErsatzTV.Application.MediaCards
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.Search
 @inherits MultiSelectBase<TelevisionShowList>
-@inject NavigationManager _navigationManager
+@inject NavigationManager NavigationManager
-@inject ChannelWriter<IBackgroundServiceRequest> _channel
+@inject PersistentComponentState ApplicationState
+@implements IDisposable
 
 <MudPaper Square="true" Style="display: flex; height: 64px; left: 240px; padding: 0; position: fixed; right: 0; z-index: 100;">
     <div style="display: flex; flex-direction: row; margin-bottom: auto; margin-top: auto; width: 100%" class="ml-6 mr-6">
@@ -63,9 +63,9 @@
         </FragmentLetterAnchor>
     </MudContainer>
 </MudContainer>
-@if (_data.PageMap.IsSome)
+@if (_data.PageMap is not null)
 {
-    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
+    <LetterBar PageMap="@_data.PageMap"
                BaseUri="media/tv/shows"
                Query="@_query"/>
 }
@@ -76,8 +76,17 @@
     [Parameter]
     public int PageNumber { get; set; }
 
-    private TelevisionShowCardResultsViewModel _data = new(0, new List<TelevisionShowCardViewModel>(), None);
+    private TelevisionShowCardResultsViewModel _data = new(0, new List<TelevisionShowCardViewModel>(), null);
     private string _query;
+    private PersistingComponentStateSubscription _persistingSubscription;
+
+    protected override Task OnInitializedAsync()
+    {
+        _persistingSubscription = ApplicationState.RegisterOnPersisting(PersistData);
+        _query = NavigationManager.Uri.GetSearchQuery();
+
+        return base.OnInitializedAsync();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
@@ -86,15 +95,33 @@
             PageNumber = 1;
         }
 
-        _query = _navigationManager.Uri.GetSearchQuery();
+        if (!ApplicationState.TryTakeFromJson("_data", out TelevisionShowCardResultsViewModel restored))
+        {
+            _data = await RefreshData();
+        }
+        else
+        {
+            _data = restored;
+        }
+    }
+    
+    private Task PersistData()
+    {
+        ApplicationState.PersistAsJson("_data", _data);
 
-        await RefreshData();
+        return Task.CompletedTask;
+    }
+    
+    void IDisposable.Dispose()
+    {
+        _persistingSubscription.Dispose();
+        base.Dispose();
     }
 
-    protected override async Task RefreshData()
+    protected override async Task<TelevisionShowCardResultsViewModel> RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:show" : $"type:show AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexShows(searchQuery, PageNumber, PageSize), CancellationToken);
+        return await Mediator.Send(new QuerySearchIndexShows(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -105,7 +132,7 @@
             (string key, string value) = _query.EncodeQuery();
             uri = $"{uri}?{key}={value}";
         }
-        _navigationManager.NavigateTo(uri);
+        NavigationManager.NavigateTo(uri);
     }
 
     private void NextPage()
@@ -116,7 +143,7 @@
             (string key, string value) = _query.EncodeQuery();
             uri = $"{uri}?{key}={value}";
         }
-        _navigationManager.NavigateTo(uri);
+        NavigationManager.NavigateTo(uri);
     }
 
     private void SelectClicked(MediaCardViewModel card, MouseEventArgs e)

ErsatzTV/Pages/_Host.cshtml

@@ -87,5 +87,6 @@
         }
     };
 </script>
+<persist-component-state />
 </body>
 </html>

ErsatzTV/Startup.cs

@@ -295,7 +295,8 @@ public class Startup
                 }
             });
 
-        services.AddServerSideBlazor();
+        services.AddServerSideBlazor()
+            .AddHubOptions(hubOptions => hubOptions.MaximumReceiveMessageSize = 1024 * 1024);
 
         services.AddMudServices();
 
@@ -520,12 +521,16 @@ public class Startup
 
         if (SearchHelper.IsElasticSearchEnabled)
         {
+            Log.Logger.Information("Using Elasticsearch (external) search index backend");
+
             ElasticSearchIndex.Uri = new Uri(SearchHelper.ElasticSearchUri);
             ElasticSearchIndex.IndexName = SearchHelper.ElasticSearchIndexName;
             services.AddSingleton<ISearchIndex, ElasticSearchIndex>();
         }
         else
         {
+            Log.Logger.Information("Using Lucene (embedded) search index backend");
+
             services.AddSingleton<ISearchIndex, LuceneSearchIndex>();
         }