fixes #627 - Populate album release date with id3 info, when availalbe

MediaBrowser.Providers/Music/AlbumDynamicInfoProvider.cs

@@ -69,6 +69,24 @@ namespace MediaBrowser.Providers.Music
                 .Distinct(StringComparer.OrdinalIgnoreCase)
                 .ToList();
 
+            var date = songs.Select(i => i.PremiereDate)
+                .FirstOrDefault(i => i.HasValue);
+
+            if (date.HasValue)
+            {
+                album.PremiereDate = date.Value;
+                album.ProductionYear = date.Value.Year;
+            }
+            else
+            {
+                var year = songs.Select(i => i.ProductionYear ?? 1800).FirstOrDefault(i => i != 1800);
+
+                if (year != 1800)
+                {
+                    album.ProductionYear = year;
+                }
+            }
+            
             // Don't save to the db
             return FalseTaskResult;
         }

MediaBrowser.Providers/Music/AlbumInfoFromSongProvider.cs

@@ -107,23 +107,6 @@ namespace MediaBrowser.Providers.Music
                 }
             }
 
-            var date = songs.Select(i => i.PremiereDate).FirstOrDefault(i => i.HasValue);
-
-            if (date != null)
-            {
-                album.PremiereDate = date.Value;
-                album.ProductionYear = date.Value.Year;
-            }
-            else
-            {
-                var year = songs.Select(i => i.ProductionYear ?? 1800).FirstOrDefault(i => i != 1800);
-
-                if (year != 1800)
-                {
-                    album.ProductionYear = year;
-                }
-            }
-
             if (!item.LockedFields.Contains(MetadataFields.Studios))
             {
                 album.Studios = songs.SelectMany(i => i.Studios)

MediaBrowser.Providers/Music/LastfmHelper.cs

@@ -103,15 +103,19 @@ namespace MediaBrowser.Providers.Music
                 item.Overview = overview;
             }
 
-            DateTime release;
-
-            if (DateTime.TryParse(data.releasedate, out release))
+            // Only grab the date here if the album doesn't already have one, since id3 tags are preferred
+            if (!item.PremiereDate.HasValue)
             {
-                // Lastfm sends back null as sometimes 1901, other times 0
-                if (release.Year > 1901)
+                DateTime release;
+
+                if (DateTime.TryParse(data.releasedate, out release))
                 {
-                    item.PremiereDate = release;
-                    item.ProductionYear = release.Year;
+                    // Lastfm sends back null as sometimes 1901, other times 0
+                    if (release.Year > 1901)
+                    {
+                        item.PremiereDate = release;
+                        item.ProductionYear = release.Year;
+                    }
                 }
             }