Add more channel features

MediaBrowser.Server.Implementations/Channels/ChannelImageProvider.cs

@@ -0,0 +1,56 @@
+using MediaBrowser.Controller.Channels;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Server.Implementations.Channels
+{
+    public class ChannelImageProvider : IDynamicImageProvider, IHasChangeMonitor
+    {
+        private readonly IChannelManager _channelManager;
+
+        public ChannelImageProvider(IChannelManager channelManager)
+        {
+            _channelManager = channelManager;
+        }
+
+        public IEnumerable<ImageType> GetSupportedImages(IHasImages item)
+        {
+            return GetChannel(item).GetSupportedChannelImages();
+        }
+
+        public Task<DynamicImageResponse> GetImage(IHasImages item, ImageType type, CancellationToken cancellationToken)
+        {
+            var channel = GetChannel(item);
+
+            return channel.GetChannelImage(type, cancellationToken);
+        }
+
+        public string Name
+        {
+            get { return "Channel Image Provider"; }
+        }
+
+        public bool Supports(IHasImages item)
+        {
+            return item is Channel;
+        }
+
+        public bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date)
+        {
+            return GetSupportedImages(item).Any(i => !item.HasImage(i));
+        }
+
+        private IChannel GetChannel(IHasImages item)
+        {
+            var channel = (Channel)item;
+
+            return ((ChannelManager)_channelManager).GetChannelProvider(channel);
+        }
+    }
+}