1 files changed, 78 insertions, 0 deletions
diff --git a/MediaBrowser.Api/HttpHandlers/GenresHandler.cs b/MediaBrowser.Api/HttpHandlers/GenresHandler.cs
new file mode 100644
index 000000000..4c5a9f4b7
--- /dev/null
+++ b/MediaBrowser.Api/HttpHandlers/GenresHandler.cs
@@ -0,0 +1,78 @@
+using MediaBrowser.Common.Net.Handlers;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.DTO;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Api.HttpHandlers
+{
+    [Export(typeof(BaseHandler))]
+    public class GenresHandler : BaseSerializationHandler<IbnItem[]>
+    {
+        public override bool HandlesRequest(HttpListenerRequest request)
+        {
+            return ApiService.IsApiUrlMatch("genres", request);
+        }
+
+        protected override Task<IbnItem[]> GetObjectToSerialize()
+        {
+            var parent = ApiService.GetItemById(QueryString["id"]) as Folder;
+            User user = ApiService.GetUserById(QueryString["userid"], true);
+
+            return GetAllGenres(parent, user);
+        }
+
+        /// <summary>
+        /// Gets all genres from all recursive children of a folder
+        /// The CategoryInfo class is used to keep track of the number of times each genres appears
+        /// </summary>
+        private async Task<IbnItem[]> GetAllGenres(Folder parent, User user)
+        {
+            var data = new Dictionary<string, int>();
+
+            // Get all the allowed recursive children
+            IEnumerable<BaseItem> allItems = parent.GetRecursiveChildren(user);
+
+            foreach (var item in allItems)
+            {
+                // Add each genre from the item to the data dictionary
+                // If the genre already exists, increment the count
+                if (item.Genres == null)
+                {
+                    continue;
+                }
+
+                foreach (string val in item.Genres)
+                {
+                    if (!data.ContainsKey(val))
+                    {
+                        data.Add(val, 1);
+                    }
+                    else
+                    {
+                        data[val]++;
+                    }
+                }
+            }
+
+            // Get the Genre objects
+            Genre[] entities = await Task.WhenAll(data.Keys.Select(key => Kernel.Instance.ItemController.GetGenre(key))).ConfigureAwait(false);
+
+            // Convert to an array of IBNItem
+            var items = new IbnItem[entities.Length];
+
+            for (int i = 0; i < entities.Length; i++)
+            {
+                Genre e = entities[i];
+
+                items[i] = ApiService.GetIbnItem(e, data[e.Name]);
+            }
+
+            return items;
+        }
+    }
+}