update default image providers

MediaBrowser.Controller/Providers/ImageRefreshOptions.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Controller.Providers
+{
+    public class ImageRefreshOptions
+    {
+        public ImageRefreshMode ImageRefreshMode { get; set; }
+        public IDirectoryService DirectoryService { get; private set; }
+
+        public bool ReplaceAllImages { get; set; }
+
+        public List<ImageType> ReplaceImages { get; set; }
+
+        public ImageRefreshOptions(IDirectoryService directoryService)
+        {
+            ImageRefreshMode = ImageRefreshMode.Default;
+            DirectoryService = directoryService;
+
+            ReplaceImages = new List<ImageType>();
+        }
+
+        public bool IsReplacingImage(ImageType type)
+        {
+            return ImageRefreshMode == ImageRefreshMode.FullRefresh &&
+                   (ReplaceAllImages || ReplaceImages.Contains(type));
+        }
+    }
+}