From ab70effd5e130ebc189c1457294fda6811590147 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Wed, 14 Aug 2013 10:05:55 -0400
Subject: [PATCH] fixes #379 - artist images don't show on web interface

---
 .../Music/ArtistsPostScanTask.cs              | 52 +++++++++++++++----
 MediaBrowser.Providers/Music/LastfmHelper.cs  |  1 -
 2 files changed, 41 insertions(+), 12 deletions(-)

diff --git a/MediaBrowser.Providers/Music/ArtistsPostScanTask.cs b/MediaBrowser.Providers/Music/ArtistsPostScanTask.cs
index 239f70df7e..1612147fbc 100644
--- a/MediaBrowser.Providers/Music/ArtistsPostScanTask.cs
+++ b/MediaBrowser.Providers/Music/ArtistsPostScanTask.cs
@@ -56,22 +56,37 @@ namespace MediaBrowser.Providers.Music
 
                 if (musicArtist != null)
                 {
-                    artist.Images = new Dictionary<ImageType, string>(musicArtist.Images);
+                    MergeImages(musicArtist.Images, artist.Images);
 
-                    artist.BackdropImagePaths = musicArtist.BackdropImagePaths.ToList();
-                    artist.ScreenshotImagePaths = musicArtist.ScreenshotImagePaths.ToList();
-                    artist.SetProviderId(MetadataProviders.Musicbrainz, musicArtist.GetProviderId(MetadataProviders.Musicbrainz));
-                    artist.Genres = musicArtist.Genres.ToList();
+                    // Merge backdrops
+                    var backdrops = musicArtist.BackdropImagePaths.ToList();
+                    backdrops.InsertRange(0, artist.BackdropImagePaths);
+                    artist.BackdropImagePaths = backdrops.Distinct(StringComparer.OrdinalIgnoreCase)
+                        .ToList();
+
+                    if (!artist.LockedFields.Contains(MetadataFields.Genres))
+                    {
+                        // Merge genres
+                        var genres = musicArtist.Genres.ToList();
+                        genres.InsertRange(0, artist.Genres);
+                        artist.Genres = genres.Distinct(StringComparer.OrdinalIgnoreCase)
+                            .ToList();
+
+                        artist.Genres = musicArtist.Genres.ToList();
+                    }
                 }
                 else
                 {
-                    // Avoid implicitly captured closure
-                    var artist1 = artist;
+                    if (!artist.LockedFields.Contains(MetadataFields.Genres))
+                    {
+                        // Avoid implicitly captured closure
+                        var artist1 = artist;
 
-                    artist.Genres = allSongs.Where(i => i.HasArtist(artist1.Name))
-                        .SelectMany(i => i.Genres)
-                        .Distinct(StringComparer.OrdinalIgnoreCase)
-                        .ToList();
+                        artist.Genres = allSongs.Where(i => i.HasArtist(artist1.Name))
+                            .SelectMany(i => i.Genres)
+                            .Distinct(StringComparer.OrdinalIgnoreCase)
+                            .ToList();
+                    }
                 }
 
                 numComplete++;
@@ -89,6 +104,21 @@ namespace MediaBrowser.Providers.Music
             await _libraryManager.ValidateArtists(cancellationToken, innerProgress).ConfigureAwait(false);
         }
 
+        private void MergeImages(Dictionary<ImageType, string> source, Dictionary<ImageType, string> target)
+        {
+            foreach (var key in source.Keys
+                .ToList()
+                .Where(k => !target.ContainsKey(k)))
+            {
+                string path;
+
+                if (source.TryGetValue(key, out path))
+                {
+                    target[key] = path;
+                }
+            }
+        }
+
         /// <summary>
         /// Gets all artists.
         /// </summary>
diff --git a/MediaBrowser.Providers/Music/LastfmHelper.cs b/MediaBrowser.Providers/Music/LastfmHelper.cs
index e3fe490010..4e7688839d 100644
--- a/MediaBrowser.Providers/Music/LastfmHelper.cs
+++ b/MediaBrowser.Providers/Music/LastfmHelper.cs
@@ -40,7 +40,6 @@ namespace MediaBrowser.Providers.Music
             target.Tags = source.Tags.ToList();
             target.Overview = source.Overview;
             target.ProductionLocations = source.ProductionLocations.ToList();
-            target.Genres = source.Genres.ToList();
         }
         
         public static void ProcessAlbumData(BaseItem item, LastfmAlbum data)