fix missing audio and subtitle language codes (#1822)

CHANGELOG.md

@@ -44,6 +44,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix adding pad filler to content that is less than one minute in duration
 - Generate unique identifier for virtual HDHomeRun tuner by @raknam
   - This allows a single Plex server to connect to multiple ETV instances
+- Include *all* language codes from media library in preferred audio and subtitle language options
+  - Language codes where an English name cannot be found will be at the bottom of the list
 
 ### Changed
 - Remove some unnecessary API calls related to media server scanning and paging

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -39,7 +39,6 @@ public class CreateChannelHandler(
     private static async Task<Validation<BaseError, Channel>> Validate(TvContext dbContext, CreateChannel request) =>
         (ValidateName(request), await ValidateNumber(dbContext, request),
             await FFmpegProfileMustExist(dbContext, request),
-            ValidatePreferredAudioLanguage(request),
             ValidatePreferredSubtitleLanguage(request),
             await WatermarkMustExist(dbContext, request),
             await FillerPresetMustExist(dbContext, request))
@@ -48,7 +47,6 @@ public class CreateChannelHandler(
                 name,
                 number,
                 ffmpegProfileId,
-                preferredAudioLanguageCode,
                 preferredSubtitleLanguageCode,
                 watermarkId,
                 fillerPresetId) =>
@@ -76,7 +74,7 @@ public class CreateChannelHandler(
                     ProgressMode = request.ProgressMode,
                     StreamingMode = request.StreamingMode,
                     Artwork = artwork,
-                    PreferredAudioLanguageCode = preferredAudioLanguageCode,
+                    PreferredAudioLanguageCode = request.PreferredAudioLanguageCode,
                     PreferredAudioTitle = request.PreferredAudioTitle,
                     PreferredSubtitleLanguageCode = preferredSubtitleLanguageCode,
                     SubtitleMode = request.SubtitleMode,
@@ -101,13 +99,6 @@ public class CreateChannelHandler(
         createChannel.NotEmpty(c => c.Name)
             .Bind(_ => createChannel.NotLongerThan(50)(c => c.Name));
 
-    private static Validation<BaseError, string> ValidatePreferredAudioLanguage(CreateChannel createChannel) =>
-        Optional(createChannel.PreferredAudioLanguageCode ?? string.Empty)
-            .Filter(
-                lc => string.IsNullOrWhiteSpace(lc) || CultureInfo.GetCultures(CultureTypes.NeutralCultures).Any(
-                    ci => string.Equals(ci.ThreeLetterISOLanguageName, lc, StringComparison.OrdinalIgnoreCase)))
-            .ToValidation<BaseError>("Preferred audio language code is invalid");
-
     private static Validation<BaseError, string> ValidatePreferredSubtitleLanguage(CreateChannel createChannel) =>
         Optional(createChannel.PreferredSubtitleLanguageCode ?? string.Empty)
             .Filter(

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -93,9 +93,8 @@ public class UpdateChannelHandler(
 
     private static async Task<Validation<BaseError, Channel>> Validate(TvContext dbContext, UpdateChannel request) =>
         (await ChannelMustExist(dbContext, request), ValidateName(request),
-            await ValidateNumber(dbContext, request),
-            ValidatePreferredAudioLanguage(request))
-        .Apply((channelToUpdate, _, _, _) => channelToUpdate);
+            await ValidateNumber(dbContext, request))
+        .Apply((channelToUpdate, _, _) => channelToUpdate);
 
     private static Task<Validation<BaseError, Channel>> ChannelMustExist(
         TvContext dbContext,
@@ -130,11 +129,4 @@ public class UpdateChannelHandler(
 
         return BaseError.New("Channel number must be unique");
     }
-
-    private static Validation<BaseError, string> ValidatePreferredAudioLanguage(UpdateChannel updateChannel) =>
-        Optional(updateChannel.PreferredAudioLanguageCode ?? string.Empty)
-            .Filter(
-                lc => string.IsNullOrWhiteSpace(lc) || CultureInfo.GetCultures(CultureTypes.NeutralCultures).Any(
-                    ci => string.Equals(ci.ThreeLetterISOLanguageName, lc, StringComparison.OrdinalIgnoreCase)))
-            .ToValidation<BaseError>("Preferred audio language code is invalid");
 }

ErsatzTV.Application/MediaItems/Queries/GetAllLanguageCodesHandler.cs

@@ -1,20 +1,18 @@
 using System.Globalization;
+using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Interfaces.Repositories;
+using ErsatzTV.Core.Metadata;
 
 namespace ErsatzTV.Application.MediaItems;
 
-public class GetAllLanguageCodesHandler : IRequestHandler<GetAllLanguageCodes, List<LanguageCodeViewModel>>
+public class GetAllLanguageCodesHandler(IMediaItemRepository mediaItemRepository)
+    : IRequestHandler<GetAllLanguageCodes, List<LanguageCodeViewModel>>
 {
-    private readonly IMediaItemRepository _mediaItemRepository;
-
-    public GetAllLanguageCodesHandler(IMediaItemRepository mediaItemRepository) =>
-        _mediaItemRepository = mediaItemRepository;
-
     public async Task<List<LanguageCodeViewModel>> Handle(
         GetAllLanguageCodes request,
         CancellationToken cancellationToken)
     {
-        List<CultureInfo> cultures = await _mediaItemRepository.GetAllLanguageCodeCultures();
-        return cultures.Map(c => new LanguageCodeViewModel(c.ThreeLetterISOLanguageName, c.EnglishName)).ToList();
+        List<LanguageCodeAndName> languageCodes = await mediaItemRepository.GetAllLanguageCodesAndNames();
+        return languageCodes.Map(c => new LanguageCodeViewModel(c.Code, c.Name)).ToList();
     }
 }

ErsatzTV.Core/Interfaces/Repositories/IMediaItemRepository.cs

@@ -1,13 +1,14 @@
 using System.Collections.Immutable;
 using System.Globalization;
 using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Metadata;
 
 namespace ErsatzTV.Core.Interfaces.Repositories;
 
 public interface IMediaItemRepository
 {
     Task<List<CultureInfo>> GetAllKnownCultures();
-    Task<List<CultureInfo>> GetAllLanguageCodeCultures();
+    Task<List<LanguageCodeAndName>> GetAllLanguageCodesAndNames();
     Task<List<int>> FlagFileNotFound(LibraryPath libraryPath, string path);
     Task<Unit> FlagNormal(MediaItem mediaItem);
     Task<Either<BaseError, Unit>> DeleteItems(List<int> mediaItemIds);

ErsatzTV.Core/Metadata/LanguageCodeAndName.cs

@@ -0,0 +1,3 @@
+namespace ErsatzTV.Core.Metadata;
+
+public record LanguageCodeAndName(string Code, string Name);

ErsatzTV.Infrastructure/Data/Repositories/MediaItemRepository.cs

@@ -5,6 +5,7 @@ using ErsatzTV.Core;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Extensions;
 using ErsatzTV.Core.Interfaces.Repositories;
+using ErsatzTV.Core.Metadata;
 using ErsatzTV.Infrastructure.Extensions;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
@@ -41,27 +42,38 @@ public class MediaItemRepository : IMediaItemRepository
         return result.ToList();
     }
 
-    public async Task<List<CultureInfo>> GetAllLanguageCodeCultures()
+    public async Task<List<LanguageCodeAndName>> GetAllLanguageCodesAndNames()
     {
         await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync();
 
-        var result = new System.Collections.Generic.HashSet<CultureInfo>();
+        var result = new System.Collections.Generic.HashSet<LanguageCodeAndName>();
 
         CultureInfo[] allCultures = CultureInfo.GetCultures(CultureTypes.NeutralCultures);
         List<string> mediaCodes = await GetAllLanguageCodes();
+        var unseenCodes = new System.Collections.Generic.HashSet<string>(mediaCodes);
         foreach (string mediaCode in mediaCodes)
         {
             foreach (string code in await dbContext.LanguageCodes.GetAllLanguageCodes(mediaCode))
             {
                 Option<CultureInfo> maybeCulture = allCultures.Find(
                     c => string.Equals(code, c.ThreeLetterISOLanguageName, StringComparison.OrdinalIgnoreCase));
+
                 foreach (CultureInfo culture in maybeCulture)
                 {
-                    result.Add(culture);
+                    unseenCodes.Remove(mediaCode);
+                    unseenCodes.Remove(code);
+                    result.Add(new LanguageCodeAndName(culture.ThreeLetterISOLanguageName, culture.EnglishName));
                 }
             }
         }
 
+        // every language code from the db must appear in the results
+        // entries that have no culture info (and thus english name) will just use the code twice
+        foreach (string mediaCode in unseenCodes.Where(c => !string.IsNullOrWhiteSpace(c)))
+        {
+            result.Add(new LanguageCodeAndName(mediaCode, mediaCode));
+        }
+
         return result.ToList();
     }
 

ErsatzTV/Validators/ChannelEditViewModelValidator.cs

@@ -15,16 +15,5 @@ public class ChannelEditViewModelValidator : AbstractValidator<ChannelEditViewMo
         RuleFor(x => x.Name).NotEmpty();
         RuleFor(x => x.Group).NotEmpty();
         RuleFor(x => x.FFmpegProfileId).GreaterThan(0);
-
-        RuleFor(x => x.PreferredAudioLanguageCode)
-            .Must(
-                languageCode => CultureInfo.GetCultures(CultureTypes.NeutralCultures)
-                    .Any(
-                        ci => string.Equals(
-                            ci.ThreeLetterISOLanguageName,
-                            languageCode,
-                            StringComparison.OrdinalIgnoreCase)))
-            .When(vm => !string.IsNullOrWhiteSpace(vm.PreferredAudioLanguageCode))
-            .WithMessage("Preferred audio language code is invalid");
     }
 }