1 files changed, 115 insertions, 0 deletions
diff --git a/MediaBrowser.Api/Music/AlbumsService.cs b/MediaBrowser.Api/Music/AlbumsService.cs
new file mode 100644
index 000000000..a80dd796a
--- /dev/null
+++ b/MediaBrowser.Api/Music/AlbumsService.cs
@@ -0,0 +1,115 @@
+using MediaBrowser.Controller.Dto;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Audio;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Persistence;
+using ServiceStack;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace MediaBrowser.Api.Music
+{
+    [Route("/Albums/{Id}/Similar", "GET")]
+    [Api(Description = "Finds albums similar to a given album.")]
+    public class GetSimilarAlbums : BaseGetSimilarItemsFromItem
+    {
+    }
+
+    public class AlbumsService : BaseApiService
+    {
+        /// <summary>
+        /// The _user manager
+        /// </summary>
+        private readonly IUserManager _userManager;
+
+        /// <summary>
+        /// The _user data repository
+        /// </summary>
+        private readonly IUserDataManager _userDataRepository;
+        /// <summary>
+        /// The _library manager
+        /// </summary>
+        private readonly ILibraryManager _libraryManager;
+        private readonly IItemRepository _itemRepo;
+        private readonly IDtoService _dtoService;
+
+        public AlbumsService(IUserManager userManager, IUserDataManager userDataRepository, ILibraryManager libraryManager, IItemRepository itemRepo, IDtoService dtoService)
+        {
+            _userManager = userManager;
+            _userDataRepository = userDataRepository;
+            _libraryManager = libraryManager;
+            _itemRepo = itemRepo;
+            _dtoService = dtoService;
+        }
+
+        /// <summary>
+        /// Gets the specified request.
+        /// </summary>
+        /// <param name="request">The request.</param>
+        /// <returns>System.Object.</returns>
+        public object Get(GetSimilarAlbums request)
+        {
+            var result = SimilarItemsHelper.GetSimilarItemsResult(_userManager,
+                _itemRepo,
+                _libraryManager,
+                _userDataRepository,
+                _dtoService,
+                Logger,
+                request, item => item is MusicAlbum,
+                GetAlbumSimilarityScore);
+
+            return ToOptimizedSerializedResultUsingCache(result);
+        }
+
+        /// <summary>
+        /// Gets the album similarity score.
+        /// </summary>
+        /// <param name="item1">The item1.</param>
+        /// <param name="item2">The item2.</param>
+        /// <returns>System.Int32.</returns>
+        private int GetAlbumSimilarityScore(BaseItem item1, BaseItem item2)
+        {
+            var points = SimilarItemsHelper.GetSimiliarityScore(item1, item2);
+
+            var album1 = (MusicAlbum)item1;
+            var album2 = (MusicAlbum)item2;
+
+            var artists1 = album1.GetRecursiveChildren()
+                .OfType<Audio>()
+                .SelectMany(i =>
+                {
+                    var list = new List<string>();
+
+                    if (!string.IsNullOrEmpty(i.AlbumArtist))
+                    {
+                        list.Add(i.AlbumArtist);
+                    }
+                    list.AddRange(i.Artists);
+
+                    return list;
+                })
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .ToList();
+
+            var artists2 = album2.GetRecursiveChildren()
+                .OfType<Audio>()
+                .SelectMany(i =>
+                {
+                    var list = new List<string>();
+
+                    if (!string.IsNullOrEmpty(i.AlbumArtist))
+                    {
+                        list.Add(i.AlbumArtist);
+                    }
+                    list.AddRange(i.Artists);
+
+                    return list;
+                })
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
+
+            return points + artists1.Where(artists2.ContainsKey).Sum(i => 5);
+        }
+    }
+}