Auto-Organize: Async operation and instant feedback UI (reworked)

This commit includes changes to enable and stabilize asyncronous
operation in the auto-organize area. Here are the key points:

- The auto-organize correction dialog is now closed (almost) instantly.
This means that the user does not have to wait until the file copy/move
operation is completed in order to continue. (even with local HDs the
copy/move process can take several minutes or even much longer with
network destination).
- This commit also implements locking of files to be organized in order
to prevent parallel processing of the same item. In effect, there can be
2 or more manual organization operations active even while the normal
auto-organization task is running without causing any problems
- The items that are currently being processed are indicated as such in
the log with an orange color and a spinner graphic
- The client display is refreshed through websocket messages
- A side effect of this is that other clients showing the auto-organize
log at the same time are always up-to-date as well

1 files changed, 8 insertions, 6 deletions

diff --git a/MediaBrowser.Api/Library/FileOrganizationService.cs b/MediaBrowser.Api/Library/FileOrganizationService.cs
index 0ed08a860..ca391bef0 100644
--- a/MediaBrowser.Api/Library/FileOrganizationService.cs
+++ b/MediaBrowser.Api/Library/FileOrganizationService.cs
@@ -154,9 +154,12 @@ namespace MediaBrowser.Api.Library
 
         public void Post(PerformOrganization request)
         {
+            // Don't await this
             var task = _iFileOrganizationService.PerformOrganization(request.Id);
 
-            Task.WaitAll(task);
+            // Async processing (close dialog early instead of waiting until the file has been copied)
+            // Wait 2s for exceptions that may occur to have them forwarded to the client for immediate error display
+            task.Wait(2000);
         }
 
         public void Post(OrganizeEpisode request)
@@ -168,6 +171,7 @@ namespace MediaBrowser.Api.Library
                 dicNewProviderIds = request.NewSeriesProviderIds;
             }
 
+            // Don't await this
             var task = _iFileOrganizationService.PerformEpisodeOrganization(new EpisodeFileOrganizationRequest
             {
                 EndingEpisodeNumber = request.EndingEpisodeNumber,
@@ -182,11 +186,9 @@ namespace MediaBrowser.Api.Library
                 TargetFolder = request.TargetFolder
             });
 
-            // For async processing (close dialog early instead of waiting until the file has been copied)
-            //var tasks = new Task[] { task };
-            //Task.WaitAll(tasks, 8000);
-
-            Task.WaitAll(task);
+            // Async processing (close dialog early instead of waiting until the file has been copied)
+            // Wait 2s for exceptions that may occur to have them forwarded to the client for immediate error display
+            task.Wait(2000);
         }
 
         public object Get(GetSmartMatchInfos request)