Fixed: A season pack import taking a long time should no longer cause the download to be deleted prematurely.

src/NzbDrone.Common/TPL/Debouncer.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading;
 
 namespace NzbDrone.Common.TPL
 {
@@ -7,6 +8,9 @@ namespace NzbDrone.Common.TPL
         private readonly Action _action;
         private readonly System.Timers.Timer _timer;
 
+        private volatile int _paused;
+        private volatile bool _triggered;
+
         public Debouncer(Action action, TimeSpan debounceDuration)
         {
             _action = action;
@@ -16,13 +20,45 @@ namespace NzbDrone.Common.TPL
 
         void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
         {
-            _timer.Stop();
-            _action();
+            if (_paused == 0)
+            {
+                _triggered = false;
+                _timer.Stop();
+                _action();
+            }
         }
 
         public void Execute()
         {
-            _timer.Start();
+            lock (_timer)
+            {
+                _triggered = true;
+                if (_paused == 0)
+                {
+                    _timer.Start();
+                }
+            }
+        }
+
+        public void Pause()
+        {
+            lock (_timer)
+            {
+                _paused++;
+                _timer.Stop();
+            }
+        }
+
+        public void Resume()
+        {
+            lock (_timer)
+            {
+                _paused--;
+                if (_paused == 0 && _triggered)
+                {
+                    _timer.Start();
+                }
+            }
         }
     }
 }