# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1509139768 -7200
# Node ID 110bbf25e2cc2151cda67bb1252b45306d1f9857
# Parent  9cabf3cd6a38c4e11028130ece06a96417a16ad5
Added a method to find the index of an attendee in the attendees list.

diff -r 9cabf3cd6a38 -r 110bbf25e2cc imiptools/editing.py
--- a/imiptools/editing.py	Fri Oct 27 22:27:12 2017 +0200
+++ b/imiptools/editing.py	Fri Oct 27 23:29:28 2017 +0200
@@ -535,6 +535,18 @@
             return self.make_response_message(recipients, update_parent,
                                               all_rescheduled, to_reschedule)
 
+    # Access methods.
+
+    def find_attendee(self, attendee):
+
+        "Return the index of 'attendee' or None if not present."
+
+        attendees = self.state.get("attendees")
+        try:
+            return attendees.keys().index(attendee)
+        except ValueError:
+            return None
+
     # Modification methods.
 
     def add_attendee(self, uri=None):