1 files changed, 81 insertions, 0 deletions
diff --git a/MediaBrowser.Providers/Music/AlbumInfoExtensions.cs b/MediaBrowser.Providers/Music/AlbumInfoExtensions.cs
new file mode 100644
index 000000000..dddfd02e4
--- /dev/null
+++ b/MediaBrowser.Providers/Music/AlbumInfoExtensions.cs
@@ -0,0 +1,81 @@
+#pragma warning disable CS1591
+
+using System.Linq;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Providers.Music
+{
+    public static class AlbumInfoExtensions
+    {
+        public static string GetAlbumArtist(this AlbumInfo info)
+        {
+            var id = info.SongInfos.SelectMany(i => i.AlbumArtists)
+                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));
+
+            if (!string.IsNullOrEmpty(id))
+            {
+                return id;
+            }
+
+            return info.AlbumArtists.Count > 0 ? info.AlbumArtists[0] : default;
+        }
+
+        public static string GetReleaseGroupId(this AlbumInfo info)
+        {
+            var id = info.GetProviderId(MetadataProvider.MusicBrainzReleaseGroup);
+
+            if (string.IsNullOrEmpty(id))
+            {
+                return info.SongInfos.Select(i => i.GetProviderId(MetadataProvider.MusicBrainzReleaseGroup))
+                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));
+            }
+
+            return id;
+        }
+
+        public static string GetReleaseId(this AlbumInfo info)
+        {
+            var id = info.GetProviderId(MetadataProvider.MusicBrainzAlbum);
+
+            if (string.IsNullOrEmpty(id))
+            {
+                return info.SongInfos.Select(i => i.GetProviderId(MetadataProvider.MusicBrainzAlbum))
+                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));
+            }
+
+            return id;
+        }
+
+        public static string GetMusicBrainzArtistId(this AlbumInfo info)
+        {
+            info.ProviderIds.TryGetValue(MetadataProvider.MusicBrainzAlbumArtist.ToString(), out string id);
+
+            if (string.IsNullOrEmpty(id))
+            {
+                info.ArtistProviderIds.TryGetValue(MetadataProvider.MusicBrainzArtist.ToString(), out id);
+            }
+
+            if (string.IsNullOrEmpty(id))
+            {
+                return info.SongInfos.Select(i => i.GetProviderId(MetadataProvider.MusicBrainzAlbumArtist))
+                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));
+            }
+
+            return id;
+        }
+
+        public static string GetMusicBrainzArtistId(this ArtistInfo info)
+        {
+            info.ProviderIds.TryGetValue(MetadataProvider.MusicBrainzArtist.ToString(), out var id);
+
+            if (string.IsNullOrEmpty(id))
+            {
+                return info.SongInfos.Select(i => i.GetProviderId(MetadataProvider.MusicBrainzAlbumArtist))
+                    .FirstOrDefault(i => !string.IsNullOrEmpty(i));
+            }
+
+            return id;
+        }
+    }
+}