# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1427839216 -7200
# Node ID 712edee5d697a4c291e7adf4d9421e8c0fcc5946
# Parent  f5fd49a85dc5703b53a2808799a3b79378ac695d
Changed form handling to only update stored events when performing one of the
appropriate actions.

diff -r f5fd49a85dc5 -r 712edee5d697 imipweb/event.py
--- a/imipweb/event.py	Tue Mar 31 20:21:14 2015 +0200
+++ b/imipweb/event.py	Wed Apr 01 00:00:16 2015 +0200
@@ -73,33 +73,43 @@
             self.redirect(self.env.get_path())
             return None
 
-        # Update the object.
-
-        if args.has_key("summary"):
-            obj["SUMMARY"] = [(args["summary"][0], {})]
-
-        attendees = uri_dict(obj.get_value_map("ATTENDEE"))
-
-        if args.has_key("partstat"):
-            if attendees.has_key(self.user):
-                attendees[self.user]["PARTSTAT"] = args["partstat"][0]
-                if attendees[self.user].has_key("RSVP"):
-                    del attendees[self.user]["RSVP"]
-
         is_organiser = get_uri(obj.get_value("ORGANIZER")) == self.user
 
         # Obtain the user's timezone and process datetime values.
 
         update = False
+        periods = None
 
         if is_organiser:
             periods, errors = self.handle_all_period_controls()
             if errors:
                 return errors
-            elif periods:
+
+        # Update the object.
+
+        if reply or invite or cancel or save:
+
+            # Update time periods (main and recurring).
+
+            if periods:
                 self.set_period_in_object(obj, periods[0])
                 self.set_periods_in_object(obj, periods[1:])
 
+            # Update summary.
+
+            if args.has_key("summary"):
+                obj["SUMMARY"] = [(args["summary"][0], {})]
+
+            # Update attendee participation.
+
+            attendees = uri_dict(obj.get_value_map("ATTENDEE"))
+
+            if args.has_key("partstat"):
+                if attendees.has_key(self.user):
+                    attendees[self.user]["PARTSTAT"] = args["partstat"][0]
+                    if attendees[self.user].has_key("RSVP"):
+                        del attendees[self.user]["RSVP"]
+
         # Obtain any participants to be added or removed.
 
         removed = args.get("remove")