Restore latest snapshot if no date is provided

lib/tfw/components/directory_snapshotting_event_handler.py

@@ -4,6 +4,7 @@
 from os.path import join as joinpath
 from os.path import basename
 from os import makedirs
+from datetime import datetime
 
 from dateutil import parser as dateparser
 
@@ -55,7 +56,12 @@ class DirectorySnapshottingEventHandler(EventHandlerBase):
         return data
 
     def handle_restore_snapshot(self, data):
-        date = dateparser.parse(data['value'])
+        date = dateparser.parse(
+            data.get(
+                'value',
+                datetime.now().isoformat()
+            )
+        )
         LOG.debug(
             'Restoring snapshots (@ %s) of directories %s',
             date,