# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1444827365 -7200
# Node ID 6e83b9a9a6099de43fed51ae7bf95500b6d14d56
# Parent  2af42e8a59ccdce3b6ab536d3164a5a61f422059
Added initial support for publishing events to their senders' addresses, thus
keeping mail/calendar clients updated about SEQUENCE changes.

diff -r 2af42e8a59cc -r 6e83b9a9a609 imipweb/resource.py
--- a/imipweb/resource.py	Wed Oct 14 14:55:02 2015 +0200
+++ b/imipweb/resource.py	Wed Oct 14 14:56:05 2015 +0200
@@ -259,12 +259,22 @@
 
     def _send_message(self, sender, recipients, parts):
 
-        # Explicitly specify the outgoing BCC recipient since we are sending as
-        # the generic calendar user.
+        """
+        Send a message, explicitly specifying the 'sender' as an outgoing BCC
+        recipient since the generic calendar user will be the actual sender.
+        """
 
         message = self.messenger.make_outgoing_message(parts, recipients, outgoing_bcc=sender)
         self.messenger.sendmail(recipients, message.as_string(), outgoing_bcc=sender)
 
+    def _send_message_to_self(self, parts):
+
+        "Send a message composed of the given 'parts' to the given user."
+
+        sender = get_address(self.user)
+        message = self.messenger.make_outgoing_message(parts, [sender])
+        self.messenger.sendmail([sender], message.as_string())
+
     # Action methods.
 
     def process_declined_counter(self, attendee):
@@ -359,6 +369,12 @@
 
             self.send_message("CANCEL", get_address(organiser), from_organiser=True)
 
+        # Since the organiser can update the SEQUENCE but this can leave any
+        # mail/calendar client lagging, issue a PUBLISH message to the user's
+        # address.
+
+        self._send_message_to_self([self.obj.to_part("PUBLISH")])
+
         return True
 
 class FormUtilities: