Fixed: Multi Language lost on Import

Fixes #4313

src/NzbDrone.Core.Test/MediaFiles/MovieImport/Aggregation/Aggregators/AggregateLanguageFixture.cs

@@ -24,18 +24,24 @@ namespace NzbDrone.Core.Test.MediaFiles.MovieImport.Aggregation.Aggregators
                                                  .Build();
         }
 
-        private ParsedMovieInfo GetParsedMovieInfo(Language language)
+        private ParsedMovieInfo GetParsedMovieInfo(List<Language> languages)
         {
             return new ParsedMovieInfo
             {
-                Languages = new List<Language> { language }
+                Languages =  languages
             };
         }
 
+        [Test]
+        public void should_return_default_if_no_info_is_known()
+        {
+            Subject.Aggregate(_localMovie, false).Languages.Should().Contain(Language.English);
+        }
+
         [Test]
         public void should_return_file_language_when_only_file_info_is_known()
         {
-            _localMovie.FileMovieInfo = GetParsedMovieInfo(Language.English);
+            _localMovie.FileMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
 
             Subject.Aggregate(_localMovie, false).Languages.Should().Contain(_localMovie.FileMovieInfo.Languages);
         }
@@ -43,8 +49,8 @@ namespace NzbDrone.Core.Test.MediaFiles.MovieImport.Aggregation.Aggregators
         [Test]
         public void should_return_folder_language_when_folder_info_is_known()
         {
-            _localMovie.FolderMovieInfo = GetParsedMovieInfo(Language.English);
-            _localMovie.FileMovieInfo = GetParsedMovieInfo(Language.English);
+            _localMovie.FolderMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+            _localMovie.FileMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
 
             Subject.Aggregate(_localMovie, false).Languages.Should().Contain(_localMovie.FolderMovieInfo.Languages);
         }
@@ -52,9 +58,9 @@ namespace NzbDrone.Core.Test.MediaFiles.MovieImport.Aggregation.Aggregators
         [Test]
         public void should_return_download_client_item_language_when_download_client_item_info_is_known()
         {
-            _localMovie.DownloadClientMovieInfo = GetParsedMovieInfo(Language.English);
-            _localMovie.FolderMovieInfo = GetParsedMovieInfo(Language.English);
-            _localMovie.FileMovieInfo = GetParsedMovieInfo(Language.English);
+            _localMovie.DownloadClientMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+            _localMovie.FolderMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+            _localMovie.FileMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
 
             Subject.Aggregate(_localMovie, false).Languages.Should().Contain(_localMovie.DownloadClientMovieInfo.Languages);
         }
@@ -62,11 +68,21 @@ namespace NzbDrone.Core.Test.MediaFiles.MovieImport.Aggregation.Aggregators
         [Test]
         public void should_return_file_language_when_file_language_is_higher_than_others()
         {
-            _localMovie.DownloadClientMovieInfo = GetParsedMovieInfo(Language.English);
-            _localMovie.FolderMovieInfo = GetParsedMovieInfo(Language.English);
-            _localMovie.FileMovieInfo = GetParsedMovieInfo(Language.French);
+            _localMovie.DownloadClientMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+            _localMovie.FolderMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+            _localMovie.FileMovieInfo = GetParsedMovieInfo(new List<Language> { Language.French });
 
             Subject.Aggregate(_localMovie, false).Languages.Should().Contain(_localMovie.FileMovieInfo.Languages);
         }
+
+        [Test]
+        public void should_return_multi_language()
+        {
+            _localMovie.DownloadClientMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+            _localMovie.FolderMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English, Language.German });
+            _localMovie.FileMovieInfo = GetParsedMovieInfo(new List<Language> { Language.English });
+
+            Subject.Aggregate(_localMovie, false).Languages.Should().Contain(_localMovie.FolderMovieInfo.Languages);
+        }
     }
 }

src/NzbDrone.Core/MediaFiles/MovieImport/Aggregation/Aggregators/AggregateLanguage.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using NLog;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Languages;
 using NzbDrone.Core.Parser.Model;
 
@@ -22,15 +23,26 @@ namespace NzbDrone.Core.MediaFiles.MovieImport.Aggregation.Aggregators
             // between parsed languages the more preferred item will be used.
             var languages = new List<Language>();
 
-            languages.AddRange(GetLanguage(localMovie.DownloadClientMovieInfo));
-            languages.AddRange(GetLanguage(localMovie.FolderMovieInfo));
-            languages.AddRange(GetLanguage(localMovie.FileMovieInfo));
+            languages.AddRange(localMovie.DownloadClientMovieInfo?.Languages ?? new List<Language>());
 
-            var language = new List<Language> { languages.FirstOrDefault(l => l != Language.English) ?? Language.English };
+            if (!languages.Any(l => l != Language.English))
+            {
+                languages.AddRange(localMovie.FolderMovieInfo?.Languages ?? new List<Language>());
+            }
+
+            if (!languages.Any(l => l != Language.English))
+            {
+                languages.AddRange(localMovie.FileMovieInfo?.Languages ?? new List<Language>());
+            }
+
+            if (!languages.Any())
+            {
+                languages.Add(Language.English);
+            }
 
-            _logger.Debug("Using language: {0}", language.First());
+            _logger.Debug("Using languages: {0}", languages.Select(l => l.Name).ToList().Join(","));
 
-            localMovie.Languages = language;
+            localMovie.Languages = languages;
 
             return localMovie;
         }