start using user policy

MediaBrowser.Server.Implementations/Library/Resolvers/SpecialFolderResolver.cs

@@ -0,0 +1,79 @@
+using MediaBrowser.Common.IO;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Resolvers;
+using System;
+using System.IO;
+using System.Linq;
+
+namespace MediaBrowser.Server.Implementations.Library.Resolvers
+{
+    class SpecialFolderResolver : FolderResolver<Folder>
+    {
+        private readonly IFileSystem _fileSystem;
+
+        public SpecialFolderResolver(IFileSystem fileSystem)
+        {
+            _fileSystem = fileSystem;
+        }
+
+        /// <summary>
+        /// Gets the priority.
+        /// </summary>
+        /// <value>The priority.</value>
+        public override ResolverPriority Priority
+        {
+            get { return ResolverPriority.First; }
+        }
+
+        /// <summary>
+        /// Resolves the specified args.
+        /// </summary>
+        /// <param name="args">The args.</param>
+        /// <returns>Folder.</returns>
+        protected override Folder Resolve(ItemResolveArgs args)
+        {
+            if (args.IsDirectory)
+            {
+                if (args.IsPhysicalRoot)
+                {
+                    return new AggregateFolder();
+                }
+                if (args.IsRoot)
+                {
+                    return new UserRootFolder();  //if we got here and still a root - must be user root
+                }
+                if (args.IsVf)
+                {
+                    return new CollectionFolder
+                    {
+                        CollectionType = GetCollectionType(args)
+                    };
+                }
+            }
+
+            return null;
+        }
+
+        private string GetCollectionType(ItemResolveArgs args)
+        {
+            return args.FileSystemChildren
+                .Where(i =>
+                {
+
+                    try
+                    {
+                        return (i.Attributes & FileAttributes.Directory) != FileAttributes.Directory &&
+                               string.Equals(".collection", i.Extension, StringComparison.OrdinalIgnoreCase);
+                    }
+                    catch (IOException)
+                    {
+                        return false;
+                    }
+
+                })
+                .Select(i => _fileSystem.GetFileNameWithoutExtension(i))
+                .FirstOrDefault();
+        }
+    }
+}