fixes #268 - (Multicd) Albums with discnumbers in subfolders on filesystem = Multiple album objects

MediaBrowser.Api/BaseApiService.cs

@@ -128,7 +128,12 @@ namespace MediaBrowser.Api
 
                 if (auth.ContainsKey("UserId"))
                 {
-                    user = UserManager.GetUserById(new Guid(auth["UserId"]));
+                    var userId = auth["UserId"];
+
+                    if (!string.IsNullOrEmpty(userId))
+                    {
+                        user = UserManager.GetUserById(new Guid(userId));
+                    }
                 }
 
                 var deviceId = auth["DeviceId"];

MediaBrowser.Controller/Entities/Audio/MusicAlbumDisc.cs

@@ -0,0 +1,25 @@
+
+namespace MediaBrowser.Controller.Entities.Audio
+{
+    /// <summary>
+    /// Class MusicAlbumDisc
+    /// </summary>
+    public class MusicAlbumDisc : Folder
+    {
+        /// <summary>
+        /// Gets or sets the display type of the media.
+        /// </summary>
+        /// <value>The display type of the media.</value>
+        public override string DisplayMediaType
+        {
+            get
+            {
+                return "Disc";
+            }
+            set
+            {
+                base.DisplayMediaType = value;
+            }
+        }
+    }
+}

MediaBrowser.Controller/MediaBrowser.Controller.csproj

@@ -71,6 +71,7 @@
     </Compile>
     <Compile Include="Configuration\IServerConfigurationManager.cs" />
     <Compile Include="Dto\SessionInfoDtoBuilder.cs" />
+    <Compile Include="Entities\Audio\MusicAlbumDisc.cs" />
     <Compile Include="Session\ISessionManager.cs" />
     <Compile Include="Drawing\ImageExtensions.cs" />
     <Compile Include="Drawing\ImageHeader.cs" />

MediaBrowser.Server.Implementations/Library/Resolvers/Audio/MusicAlbumDiscResolver.cs

@@ -0,0 +1,33 @@
+using MediaBrowser.Controller.Entities.Audio;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Resolvers;
+
+namespace MediaBrowser.Server.Implementations.Library.Resolvers.Audio
+{
+    /// <summary>
+    /// Class MusicAlbumDiscResolver
+    /// </summary>
+    public class MusicAlbumDiscResolver : ItemResolver<MusicAlbumDisc>
+    {
+        /// <summary>
+        /// Gets the priority.
+        /// </summary>
+        /// <value>The priority.</value>
+        public override ResolverPriority Priority
+        {
+            get { return ResolverPriority.Third; } // we need to be ahead of the generic folder resolver but behind the movie one
+        }
+
+        /// <summary>
+        /// Resolves the specified args.
+        /// </summary>
+        /// <param name="args">The args.</param>
+        /// <returns>MusicAlbum.</returns>
+        protected override MusicAlbumDisc Resolve(ItemResolveArgs args)
+        {
+            if (!args.IsDirectory) return null;
+
+            return args.Parent is MusicAlbum ? new MusicAlbumDisc() : null;
+        }
+    }
+}

MediaBrowser.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs

@@ -1,10 +1,9 @@
-using System.Collections.Generic;
+using MediaBrowser.Controller.Entities.Audio;
-using System.IO;
-using System.Linq;
-using MediaBrowser.Controller.Entities.Audio;
-using MediaBrowser.Controller.IO;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Resolvers;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
 
 namespace MediaBrowser.Server.Implementations.Library.Resolvers.Audio
 {
@@ -34,6 +33,7 @@ namespace MediaBrowser.Server.Implementations.Library.Resolvers.Audio
             //Avoid mis-identifying top folders
             if (args.Parent == null) return null;
             if (args.Parent.IsRoot) return null;
+            if (args.Parent is MusicAlbum) return null;
 
             return IsMusicAlbum(args) ? new MusicAlbum() : null;
         }

MediaBrowser.Server.Implementations/MediaBrowser.Server.Implementations.csproj

@@ -129,6 +129,7 @@
     <Compile Include="Library\LuceneSearchEngine.cs" />
     <Compile Include="Library\ResolverHelper.cs" />
     <Compile Include="Library\Resolvers\Audio\AudioResolver.cs" />
+    <Compile Include="Library\Resolvers\Audio\MusicAlbumDiscResolver.cs" />
     <Compile Include="Library\Resolvers\Audio\MusicAlbumResolver.cs" />
     <Compile Include="Library\Resolvers\Audio\MusicArtistResolver.cs" />
     <Compile Include="Library\Resolvers\BaseItemResolver.cs" />