Prioritize metadata merging by preferred language

MediaBrowser.Controller/Providers/MetadataResult.cs

@@ -13,13 +13,14 @@ namespace MediaBrowser.Controller.Providers
         public MetadataResult()
         {
             Images = new List<LocalImageInfo>();
+            ResultLanguage = "en";
         }
 
         public List<PersonInfo> People { get; set; }
 
         public bool HasMetadata { get; set; }
         public T Item { get; set; }
-
+        public string ResultLanguage { get; set; }
         public void AddPerson(PersonInfo p)
         {
             if (People == null)

MediaBrowser.Providers/Manager/MetadataService.cs

@@ -646,6 +646,8 @@ namespace MediaBrowser.Providers.Manager
         {
             var refreshResult = new RefreshResult();
 
+            var results = new List<MetadataResult<TItemType>>();
+
             foreach (var provider in providers)
             {
                 var providerName = provider.GetType().Name;
@@ -662,7 +664,7 @@ namespace MediaBrowser.Providers.Manager
 
                     if (result.HasMetadata)
                     {
-                        MergeData(result, temp, new List<MetadataFields>(), false, false);
+                        results.Add(result);
 
                         refreshResult.UpdateType = refreshResult.UpdateType | ItemUpdateType.MetadataDownload;
                     }
@@ -683,6 +685,38 @@ namespace MediaBrowser.Providers.Manager
                 }
             }
 
+            var orderedResults = new List<MetadataResult<TItemType>>();
+
+            if (string.IsNullOrEmpty(id.MetadataLanguage))
+            {
+                orderedResults.AddRange(results);
+            }
+            else
+            {
+                // prioritize results with matching ResultLanguage
+                foreach (var result in results)
+                {
+                    if (!string.IsNullOrEmpty(result.ResultLanguage) && result.ResultLanguage == id.MetadataLanguage)
+                    {
+                        orderedResults.Add(result);
+                    }
+                }
+
+                // add all other results
+                foreach (var result in results)
+                {
+                    if (!orderedResults.Contains(result))
+                    {
+                        orderedResults.Add(result);
+                    }
+                }
+            }
+
+            foreach (var result in results)
+            {
+                MergeData(result, temp, new List<MetadataFields>(), false, false);
+            }
+
             return refreshResult;
         }
 

MediaBrowser.Providers/TV/TheMovieDb/MovieDbEpisodeProvider.cs

@@ -92,6 +92,12 @@ namespace MediaBrowser.Providers.TV
 
                 result.HasMetadata = true;
 
+                if (!string.IsNullOrEmpty(response.overview))
+                {
+                    // if overview is non-empty, we can assume that localized data was returned
+                    result.ResultLanguage = info.MetadataLanguage;
+                }
+
                 var item = new Episode();
                 result.Item = item;
 

MediaBrowser.Providers/TV/TheMovieDb/MovieDbSeriesProvider.cs

@@ -168,7 +168,7 @@ namespace MediaBrowser.Providers.TV
             {
                 cancellationToken.ThrowIfCancellationRequested();
 
-                result.Item = await FetchSeriesData(tmdbId, info.MetadataLanguage, info.MetadataCountryCode, cancellationToken).ConfigureAwait(false);
+                result = await FetchMovieData(tmdbId, info.MetadataLanguage, info.MetadataCountryCode, cancellationToken).ConfigureAwait(false);
 
                 result.HasMetadata = result.Item != null;
             }
@@ -176,7 +176,7 @@ namespace MediaBrowser.Providers.TV
             return result;
         }
 
-        private async Task<Series> FetchSeriesData(string tmdbId, string language, string preferredCountryCode, CancellationToken cancellationToken)
+        private async Task<MetadataResult<Series>> FetchMovieData(string tmdbId, string language, string preferredCountryCode, CancellationToken cancellationToken)
         {
             string dataFilePath = null;
             RootObject seriesInfo = null;
@@ -199,11 +199,13 @@ namespace MediaBrowser.Providers.TV
 
             await EnsureSeriesInfo(tmdbId, language, cancellationToken).ConfigureAwait(false);
 
-            var item = new Series();
+            var result = new MetadataResult<Series>();
+            result.Item = new Series();
+            result.ResultLanguage = seriesInfo.ResultLanguage;
 
-            ProcessMainInfo(item, seriesInfo, preferredCountryCode);
+            ProcessMainInfo(result.Item, seriesInfo, preferredCountryCode);
 
-            return item;
+            return result;
         }
 
         private void ProcessMainInfo(Series series, RootObject seriesInfo, string preferredCountryCode)
@@ -354,6 +356,11 @@ namespace MediaBrowser.Providers.TV
             }).ConfigureAwait(false))
             {
                 mainResult = _jsonSerializer.DeserializeFromStream<RootObject>(json);
+
+                if (!string.IsNullOrEmpty(language))
+                {
+                    mainResult.ResultLanguage = language;
+                }
             }
 
             cancellationToken.ThrowIfCancellationRequested();
@@ -385,6 +392,7 @@ namespace MediaBrowser.Providers.TV
                     var englishResult = _jsonSerializer.DeserializeFromStream<RootObject>(json);
 
                     mainResult.overview = englishResult.overview;
+                    mainResult.ResultLanguage = "en";
                 }
             }
 
@@ -627,6 +635,7 @@ namespace MediaBrowser.Providers.TV
             public ExternalIds external_ids { get; set; }
             public Videos videos { get; set; }
             public ContentRatings content_ratings { get; set; }
+            public string ResultLanguage { get; set; }
         }
 
         public int Order

MediaBrowser.Providers/TV/TheTVDB/TvdbEpisodeProvider.cs

@@ -713,6 +713,17 @@ namespace MediaBrowser.Providers.TV
 									}
 								}
 
+								break;
+							}
+						case "Language":
+							{
+								var val = reader.ReadElementContentAsString();
+
+								if (!string.IsNullOrWhiteSpace(val))
+								{
+                                    result.ResultLanguage = val;
+								}
+
 								break;
 							}
 

MediaBrowser.Providers/TV/TheTVDB/TvdbSeriesProvider.cs

@@ -159,7 +159,7 @@ namespace MediaBrowser.Providers.TV
             var seriesXmlPath = GetSeriesXmlPath(seriesProviderIds, metadataLanguage);
             var actorsXmlPath = Path.Combine(seriesDataPath, "actors.xml");
 
-            FetchSeriesInfo(series, seriesXmlPath, cancellationToken);
+            FetchSeriesInfo(result, seriesXmlPath, cancellationToken);
 
             cancellationToken.ThrowIfCancellationRequested();
 
@@ -607,7 +607,7 @@ namespace MediaBrowser.Providers.TV
             return name.Trim();
         }
 
-        private void FetchSeriesInfo(Series item, string seriesXmlPath, CancellationToken cancellationToken)
+        private void FetchSeriesInfo(MetadataResult<Series> result, string seriesXmlPath, CancellationToken cancellationToken)
         {
             var settings = new XmlReaderSettings
             {
@@ -639,7 +639,7 @@ namespace MediaBrowser.Providers.TV
                                     {
                                         using (var subtree = reader.ReadSubtree())
                                         {
-                                            FetchDataFromSeriesNode(item, subtree, cancellationToken);
+                                            FetchDataFromSeriesNode(result, subtree, cancellationToken);
                                         }
                                         break;
                                     }
@@ -667,9 +667,9 @@ namespace MediaBrowser.Providers.TV
                 }
             }
 
-            if (item.Status.HasValue && item.Status.Value == SeriesStatus.Ended && episiodeAirDates.Count > 0)
+            if (result.Item.Status.HasValue && result.Item.Status.Value == SeriesStatus.Ended && episiodeAirDates.Count > 0)
             {
-                item.EndDate = episiodeAirDates.Max();
+                result.Item.EndDate = episiodeAirDates.Max();
             }
         }
 
@@ -861,8 +861,10 @@ namespace MediaBrowser.Providers.TV
             }
         }
 
-        private void FetchDataFromSeriesNode(Series item, XmlReader reader, CancellationToken cancellationToken)
+        private void FetchDataFromSeriesNode(MetadataResult<Series> result, XmlReader reader, CancellationToken cancellationToken)
         {
+            Series item = result.Item;
+
             reader.MoveToContent();
 
             // Loop through each element
@@ -886,6 +888,12 @@ namespace MediaBrowser.Providers.TV
                                 break;
                             }
 
+                        case "Language":
+                            {
+                                result.ResultLanguage = (reader.ReadElementContentAsString() ?? string.Empty).Trim();
+                                break;
+                            }
+
                         case "Airs_DayOfWeek":
                             {
                                 var val = reader.ReadElementContentAsString();