code to support import existing series.

NzbDrone.Api/RootFolders/RootFolderModule.cs

@@ -0,0 +1,40 @@
+using System.Linq;
+using Nancy;
+using NzbDrone.Api.Extentions;
+using NzbDrone.Core.Providers;
+using NzbDrone.Core.Repository;
+
+namespace NzbDrone.Api.RootFolders
+{
+    public class RootDirModule : NzbDroneApiModule
+    {
+        private readonly RootDirProvider _rootDirProvider;
+
+        public RootDirModule(RootDirProvider rootDirProvider)
+            : base("//rootdir")
+        {
+            _rootDirProvider = rootDirProvider;
+
+            Get["/"] = x => GetRootFolders();
+            Post["/"] = x => AddRootFolder();
+            Delete["/{id}"] = x => DeleteRootFolder((int)x.id);
+        }
+
+        private Response AddRootFolder()
+        {
+            var dir = _rootDirProvider.Add(Request.Body.FromJson<RootDir>());
+            return dir.AsResponse(HttpStatusCode.Created);
+        }
+
+        private Response GetRootFolders()
+        {
+            return _rootDirProvider.AllWithFreeSpace().AsResponse();
+        }
+
+        private Response DeleteRootFolder(int folderId)
+        {
+            _rootDirProvider.Remove(folderId);
+            return new Response { StatusCode = HttpStatusCode.OK };
+        }
+    }
+}