Support anime series ordering with core providers

MediaBrowser.Providers/Manager/SeriesOrderManager.cs

@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using MediaBrowser.Common;
+using MediaBrowser.Controller.Providers;
+
+namespace MediaBrowser.Providers.Manager
+{
+    public class SeriesOrderManager : ISeriesOrderManager
+    {
+        private Dictionary<string, ISeriesOrderProvider[]> _providers;
+
+        public void AddParts(IEnumerable<ISeriesOrderProvider> orderProviders)
+        {
+            _providers = orderProviders
+                .GroupBy(p => p.OrderType)
+                .ToDictionary(g => g.Key, g => g.ToArray());
+        }
+
+        public async Task<int?> FindSeriesIndex(string orderType, string seriesName)
+        {
+            ISeriesOrderProvider[] providers;
+            if (!_providers.TryGetValue(orderType, out providers))
+                return null;
+
+            foreach (ISeriesOrderProvider provider in providers)
+            {
+                int? index = await provider.FindSeriesIndex(seriesName);
+                if (index != null)
+                    return index;
+            }
+
+            return null;
+        }
+    }
+}