Improve renaming of series folder within the same root folder

src/NzbDrone.Common/Disk/DiskProviderBase.cs

@@ -227,6 +227,14 @@ namespace NzbDrone.Common.Disk
             MoveFileInternal(source, destination);
         }
 
+        public void MoveFolder(string source, string destination)
+        {
+            Ensure.That(source, () => source).IsValidPath();
+            Ensure.That(destination, () => destination).IsValidPath();
+
+            Directory.Move(source, destination);
+        }
+
         protected virtual void MoveFileInternal(string source, string destination)
         {
             File.Move(source, destination);

src/NzbDrone.Common/Disk/IDiskProvider.cs

@@ -28,6 +28,7 @@ namespace NzbDrone.Common.Disk
         void DeleteFile(string path);
         void CopyFile(string source, string destination, bool overwrite = false);
         void MoveFile(string source, string destination, bool overwrite = false);
+        void MoveFolder(string source, string destination);
         bool TryCreateHardLink(string source, string destination);
         void DeleteFolder(string path, bool recursive);
         string ReadAllText(string filePath);

src/NzbDrone.Core/Tv/MoveSeriesService.cs

@@ -1,10 +1,12 @@
 using System.IO;
 using NLog;
 using NzbDrone.Common.Disk;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Instrumentation.Extensions;
 using NzbDrone.Core.Messaging.Commands;
 using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.Organizer;
+using NzbDrone.Core.RootFolders;
 using NzbDrone.Core.Tv.Commands;
 using NzbDrone.Core.Tv.Events;
 
@@ -16,6 +18,7 @@ namespace NzbDrone.Core.Tv
         private readonly IBuildFileNames _filenameBuilder;
         private readonly IDiskProvider _diskProvider;
         private readonly IDiskTransferService _diskTransferService;
+        private readonly IRootFolderService _rootFolderService;
         private readonly IEventAggregator _eventAggregator;
         private readonly Logger _logger;
 
@@ -23,6 +26,7 @@ namespace NzbDrone.Core.Tv
                                  IBuildFileNames filenameBuilder,
                                  IDiskProvider diskProvider,
                                  IDiskTransferService diskTransferService,
+                                 IRootFolderService rootFolderService,
                                  IEventAggregator eventAggregator,
                                  Logger logger)
         {
@@ -30,6 +34,7 @@ namespace NzbDrone.Core.Tv
             _filenameBuilder = filenameBuilder;
             _diskProvider = diskProvider;
             _diskTransferService = diskTransferService;
+            _rootFolderService = rootFolderService;
             _eventAggregator = eventAggregator;
             _logger = logger;
         }
@@ -53,7 +58,18 @@ namespace NzbDrone.Core.Tv
 
             try
             {
-                _diskTransferService.TransferFolder(sourcePath, destinationPath, TransferMode.Move);
+                var sourceRootFolder = _rootFolderService.GetBestRootFolderPath(sourcePath);
+                var destinationRootFolder = _rootFolderService.GetBestRootFolderPath(destinationPath);
+
+                if (sourceRootFolder.PathEquals(destinationRootFolder) && !_diskProvider.FolderExists(destinationPath))
+                {
+                    _diskProvider.MoveFolder(sourcePath, destinationPath);
+                }
+                else
+                {
+                    _diskTransferService.TransferFolder(sourcePath, destinationPath, TransferMode.Move);
+                }
+
                 _logger.ProgressInfo("{0} moved successfully to {1}", series.Title, series.Path);
 
                 _eventAggregator.PublishEvent(new SeriesMovedEvent(series, sourcePath, destinationPath));