Backport pull request #15793 from jellyfin/release-10.11.z

Prefer US rating on fallback

Original-merge: 156761405e7fd5308474a7e6301839ae7c694dfa

Merged-by: crobibero <cody@robibe.ro>

Backported-by: Bond_009 <bond.009@outlook.com>

Emby.Server.Implementations/Localization/LocalizationManager.cs

@@ -311,15 +311,19 @@ namespace Emby.Server.Implementations.Localization
             else
             {
                 // Fall back to server default language for ratings check
-                // If it has no ratings, use the US ratings
-                var ratingsDictionary = GetParentalRatingsDictionary() ?? GetParentalRatingsDictionary("us");
+                var ratingsDictionary = GetParentalRatingsDictionary();
                 if (ratingsDictionary is not null && ratingsDictionary.TryGetValue(rating, out ParentalRatingScore? value))
                 {
                     return value;
                 }
             }
 
-            // If we don't find anything, check all ratings systems
+            // If we don't find anything, check all ratings systems, starting with US
+            if (_allParentalRatings.TryGetValue("us", out var usRatings) && usRatings.TryGetValue(rating, out var usValue))
+            {
+                return usValue;
+            }
+
             foreach (var dictionary in _allParentalRatings.Values)
             {
                 if (dictionary.TryGetValue(rating, out var value))

tests/Jellyfin.Server.Implementations.Tests/Localization/LocalizationManagerTests.cs

@@ -203,6 +203,25 @@ namespace Jellyfin.Server.Implementations.Tests.Localization
             Assert.Null(localizationManager.GetRatingScore(value));
         }
 
+        [Theory]
+        [InlineData("TV-MA", "DE", 17, 1)] // US-only rating, DE country code
+        [InlineData("PG-13", "FR", 13, 0)] // US-only rating, FR country code
+        [InlineData("R", "JP", 17, 0)] // US-only rating, JP country code
+        public async Task GetRatingScore_FallbackPrioritizesUS_Success(string rating, string countryCode, int expectedScore, int? expectedSubScore)
+        {
+            var localizationManager = Setup(new ServerConfiguration()
+            {
+                MetadataCountryCode = countryCode
+            });
+            await localizationManager.LoadAll();
+
+            var score = localizationManager.GetRatingScore(rating);
+
+            Assert.NotNull(score);
+            Assert.Equal(expectedScore, score.Score);
+            Assert.Equal(expectedSubScore, score.SubScore);
+        }
+
         [Theory]
         [InlineData("Default", "Default")]
         [InlineData("HeaderLiveTV", "Live TV")]