feat: restrict anime trailers, not all animation (v1.0.0.12)

v1.0.0.11 kept every animated trailer away from non-animated content, which
also blocked Western animation (Pixar, Disney...). Only anime should be
restricted.

At download, a trailer is tagged ct4j-anime when TMDB has the "anime" or
"based on manga" keyword, or it is Animation in ja/zh/ko (keywords are now
appended to the details request). At playback, anime trailers are dropped
unless the feature is anime (genre "Anime", or those keywords as tags).
Western animation follows the normal genre/rating filters again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Jellyfin.Plugin.CinemaTrailers4Jellyfins.csproj

@@ -3,8 +3,8 @@
   <PropertyGroup>
     <TargetFramework>net9.0</TargetFramework>
     <RootNamespace>Jellyfin.Plugin.CinemaTrailers4Jellyfins</RootNamespace>
-    <AssemblyVersion>1.0.0.11</AssemblyVersion>
-    <FileVersion>1.0.0.11</FileVersion>
+    <AssemblyVersion>1.0.0.12</AssemblyVersion>
+    <FileVersion>1.0.0.12</FileVersion>
     <Nullable>enable</Nullable>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>

Jellyfin.Plugin.CinemaTrailers4Jellyfins/ScheduledTasks/DownloadTrailersTask.cs

@@ -217,7 +217,8 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.ScheduledTasks
                 var metadata = await _tmdbService.GetMediaMetadataAsync(
                     "movie", movie.Id.ToString(), config.TmdbApiKey, cancellationToken).ConfigureAwait(false);
 
-                _fakeMovieService.WriteNfo(paths.NfoPath, movie.Title, movie.Year, metadata.Genres, metadata.Certification);
+                _fakeMovieService.WriteNfo(paths.NfoPath, movie.Title, movie.Year, metadata.Genres, metadata.Certification,
+                    metadata.IsAnime ? new[] { TrailerTags.Anime } : null);
 
                 downloaded++;
                 _logger.LogInformation(
@@ -323,7 +324,8 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.ScheduledTasks
                 var metadata = await _tmdbService.GetMediaMetadataAsync(
                     "tv", show.Id.ToString(), config.TmdbApiKey, cancellationToken).ConfigureAwait(false);
 
-                _fakeMovieService.WriteNfo(paths.NfoPath, show.Title, show.Year, metadata.Genres, metadata.Certification, new[] { TrailerTags.TvShow });
+                _fakeMovieService.WriteNfo(paths.NfoPath, show.Title, show.Year, metadata.Genres, metadata.Certification,
+                    metadata.IsAnime ? new[] { TrailerTags.TvShow, TrailerTags.Anime } : new[] { TrailerTags.TvShow });
 
                 downloaded++;
                 _logger.LogInformation(

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Services/TmdbService.cs

@@ -19,7 +19,7 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
         public int? Year => DateTime.TryParse(ReleaseDate, out var d) ? d.Year : (int?)null;
     }
 
-    public record TmdbMediaMetadata(IReadOnlyList<string> Genres, string? Certification);
+    public record TmdbMediaMetadata(IReadOnlyList<string> Genres, string? Certification, bool IsAnime);
 
     public class TmdbService : IDisposable
     {
@@ -236,7 +236,7 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
             try
             {
                 var appendField = mediaType == "movie" ? "release_dates" : "content_ratings";
-                var url = $"{BaseUrl}/{mediaType}/{tmdbId}?append_to_response={appendField}&language=en-US";
+                var url = $"{BaseUrl}/{mediaType}/{tmdbId}?append_to_response={appendField},keywords&language=en-US";
                 using var request = new HttpRequestMessage(HttpMethod.Get, url);
                 ApplyAuth(request, apiKey);
                 using var response = await _httpClient.SendAsync(request, ct).ConfigureAwait(false);
@@ -262,16 +262,40 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
                     ? GetMovieCertification(doc)
                     : GetTvCertification(doc);
 
-                return new TmdbMediaMetadata(genres.AsReadOnly(), certification);
+                return new TmdbMediaMetadata(genres.AsReadOnly(), certification, IsAnime(doc, mediaType, genres));
             }
             catch (OperationCanceledException) { throw; }
             catch (Exception ex)
             {
                 _logger.LogError(ex, "|CinemaTrailers4Jellyfins| GetMediaMetadata failed for {MediaType} TMDB ID {Id}", mediaType, tmdbId);
-                return new TmdbMediaMetadata(Array.Empty<string>(), null);
+                return new TmdbMediaMetadata(Array.Empty<string>(), null, false);
             }
         }
 
+        private static readonly string[] AnimeKeywords = { "anime", "based on manga" };
+        private static readonly string[] AnimeLanguages = { "ja", "zh", "ko" };
+
+        // Anime vs. Western animation: both carry TMDB's "Animation" genre, so use the "anime" /
+        // "based on manga" keywords, or Animation made in Japanese, Chinese or Korean.
+        private static bool IsAnime(JsonDocument doc, string mediaType, List<string> genres)
+        {
+            // Movie keywords live under keywords.keywords, TV keywords under keywords.results.
+            var listName = mediaType == "movie" ? "keywords" : "results";
+            if (doc.RootElement.TryGetProperty("keywords", out var kw)
+                && kw.TryGetProperty(listName, out var list)
+                && list.ValueKind == JsonValueKind.Array
+                && list.EnumerateArray().Any(k =>
+                    k.TryGetProperty("name", out var n)
+                    && AnimeKeywords.Contains(n.GetString(), StringComparer.OrdinalIgnoreCase)))
+            {
+                return true;
+            }
+
+            return genres.Contains("Animation", StringComparer.OrdinalIgnoreCase)
+                && doc.RootElement.TryGetProperty("original_language", out var lang)
+                && AnimeLanguages.Contains(lang.GetString(), StringComparer.OrdinalIgnoreCase);
+        }
+
         // Finds the US theatrical certification (G, PG, PG-13, R, NC-17) from release_dates.
         private static string? GetMovieCertification(JsonDocument doc)
         {

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Services/TrailerIntroProvider.cs

@@ -147,12 +147,12 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
                 }
                 else
                 {
-                    // Animation is a style, not a topic: animated trailers (anime included) only play
-                    // before animated content. Applied before the fallback below, so a live-action
-                    // feature never gets one — it gets no trailer instead.
-                    var eligible = IsAnimated(feature)
+                    // Anime trailers only play before anime. Applied before the fallback below, so
+                    // non-anime content never gets one — it gets no trailer instead. Western animation
+                    // is not affected and follows the normal filters.
+                    var eligible = IsAnimeFeature(feature)
                         ? pairs
-                        : pairs.Where(p => !IsAnimated(p.Movie)).ToList();
+                        : pairs.Where(p => !IsAnimeTrailer(p.Movie)).ToList();
 
                     // Apply enabled filters. If nothing survives, fall back to the eligible pool.
                     var filtered = ApplyFilters(eligible, feature, config);
@@ -236,11 +236,19 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
             return new IntroInfo { ItemId = movie.Id, Path = movie.Path };
         }
 
-        // TMDB tags anime as "Animation"; anime metadata providers (e.g. AniDB) use "Anime".
-        private static readonly string[] AnimatedGenres = { "Animation", "Anime" };
+        // Library items: anime providers (e.g. AniDB) set the "Anime" genre; TMDB-scraped items
+        // carry TMDB keywords as tags ("anime", "based on manga"). "Animation" alone is not enough —
+        // it also covers Western animation.
+        private static readonly string[] AnimeFeatureTags = { "anime", "based on manga" };
 
-        private static bool IsAnimated(BaseItem item)
-            => item.Genres.Any(g => AnimatedGenres.Contains(g, StringComparer.OrdinalIgnoreCase));
+        private static bool IsAnimeFeature(BaseItem item)
+            => item.Genres.Contains("Anime", StringComparer.OrdinalIgnoreCase)
+               || item.Tags.Any(t => AnimeFeatureTags.Contains(t, StringComparer.OrdinalIgnoreCase));
+
+        // Trailers are tagged at download time from TMDB data (see TmdbService.IsAnime).
+        private static bool IsAnimeTrailer(BaseItem item)
+            => item.Tags.Contains(TrailerTags.Anime, StringComparer.OrdinalIgnoreCase)
+               || item.Genres.Contains("Anime", StringComparer.OrdinalIgnoreCase);
 
         private static List<(Movie Movie, BaseItem Trailer)> ApplyFilters(
             List<(Movie Movie, BaseItem Trailer)> pairs,

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Services/TrailerTags.cs

@@ -2,11 +2,14 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
 {
     /// <summary>
     /// Tags written into each downloaded trailer's NFO so <see cref="TrailerIntroProvider"/>
-    /// can tell movie trailers and TV show trailers apart within the shared output folder.
+    /// can tell movie trailers, TV show trailers and anime trailers apart within the shared output folder.
     /// </summary>
     public static class TrailerTags
     {
         /// <summary>Marks a fake-movie folder as containing a TV show trailer.</summary>
         public const string TvShow = "ct4j-tvshow";
+
+        /// <summary>Marks a trailer as anime, so it only plays before anime content.</summary>
+        public const string Anime = "ct4j-anime";
     }
 }