availablesubs: clear task data after download; clear other task data on new request

Contents/Code/interface/item_details.py

@@ -293,4 +293,6 @@ def TriggerDownloadSubtitle(rating_key=None, subtitle_id=None, item_title=None,
     else:
         scheduler.dispatch_task("DownloadSubtitleForItem", rating_key=rating_key, subtitle=download_subtitle)
 
+    scheduler.clear_task_data("AvailableSubsForItem")
+
     return fatality(randomize=timestamp(), header=" ", replace_parent=True)

Contents/Code/support/tasks.py

@@ -234,10 +234,11 @@ class AvailableSubsForItem(SubtitleListingMixin, Task):
 
     def post_run(self, task_data):
         super(AvailableSubsForItem, self).post_run(task_data)
-        if self.rating_key not in task_data:
-            task_data[self.rating_key] = {}
-
-        task_data[self.rating_key][self.language] = self.data
+        # clean old data
+        for key in task_data.keys():
+            if key != self.rating_key:
+                del task_data[key]
+        task_data.update({self.rating_key: {self.language: self.data}})
 
 
 class DownloadSubtitleForItem(DownloadSubtitleMixin, Task):