1 files changed, 85 insertions, 0 deletions
diff --git a/MediaBrowser.Providers/Music/MusicAlbumDynamicInfoProvider.cs b/MediaBrowser.Providers/Music/MusicAlbumDynamicInfoProvider.cs
new file mode 100644
index 0000000000..3d4c401e7a
--- /dev/null
+++ b/MediaBrowser.Providers/Music/MusicAlbumDynamicInfoProvider.cs
@@ -0,0 +1,85 @@
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Audio;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Logging;
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Providers.Music
+{
+    /// <summary>
+    /// Class MusicAlbumDynamicInfoProvider
+    /// </summary>
+    public class MusicAlbumDynamicInfoProvider : BaseMetadataProvider, IDynamicInfoProvider
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BaseMetadataProvider" /> class.
+        /// </summary>
+        /// <param name="logManager">The log manager.</param>
+        /// <param name="configurationManager">The configuration manager.</param>
+        public MusicAlbumDynamicInfoProvider(ILogManager logManager, IServerConfigurationManager configurationManager)
+            : base(logManager, configurationManager)
+        {
+        }
+
+        /// <summary>
+        /// Supportses the specified item.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
+        public override bool Supports(BaseItem item)
+        {
+            return item is MusicAlbum;
+        }
+
+        /// <summary>
+        /// Needses the refresh internal.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="providerInfo">The provider info.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
+        protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
+        {
+            return true;
+        }
+
+        /// <summary>
+        /// Fetches metadata and returns true or false indicating if any work that requires persistence was done
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="force">if set to <c>true</c> [force].</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{System.Boolean}.</returns>
+        public override Task<bool> FetchAsync(BaseItem item, bool force, CancellationToken cancellationToken)
+        {
+            var album = (MusicAlbum)item;
+
+            var songs = album.RecursiveChildren
+                             .OfType<Audio>()
+                             .ToList();
+
+            album.AlbumArtist = songs
+                .Select(i => i.AlbumArtist)
+                .FirstOrDefault(i => !string.IsNullOrEmpty(i));
+
+            album.Artists = songs.SelectMany(i => i.Artists)
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .ToArray();
+
+            // Don't save to the db
+            return FalseTaskResult;
+        }
+
+        /// <summary>
+        /// Gets the priority.
+        /// </summary>
+        /// <value>The priority.</value>
+        public override MetadataProviderPriority Priority
+        {
+            get { return MetadataProviderPriority.Last; }
+        }
+    }
+}