# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1418941496 -3600
# Node ID 33a8c753637c75e424d6822580749bead5ee17be
# Parent  cba0ca85b83eb14f2303bbad390b7abe88d3c797
Support event cancellations issued by a person.

diff -r cba0ca85b83e -r 33a8c753637c imiptools/handlers/person_outgoing.py
--- a/imiptools/handlers/person_outgoing.py	Thu Dec 18 22:18:53 2014 +0100
+++ b/imiptools/handlers/person_outgoing.py	Thu Dec 18 23:24:56 2014 +0100
@@ -12,17 +12,32 @@
 
     "Handling mechanisms specific to people."
 
-    def _record(self, objtype, from_organiser=True, update_freebusy=False):
+    def _get_identity(self, objtype, from_organiser=True):
 
-        # Get the identity of interest in a usable form.
+        """
+        Get the identity of interest in a usable form for any unprocessed
+        object.
+        """
 
-        identity, attr = uri_item(self.get_item(from_organiser and "ORGANIZER" or "ATTENDEE"))
+        identity, attr = item = uri_item(self.get_item(from_organiser and "ORGANIZER" or "ATTENDEE"))
 
         # Check for event using UID.
 
         if not self.have_new_object(identity, objtype):
+            return None
+
+        return item
+
+    def _record(self, objtype, from_organiser=True, update_freebusy=False):
+
+        "Record free/busy and object information."
+
+        item = self._get_identity(objtype, from_organiser)
+        if not item:
             return False
 
+        identity, attr = item
+
         # Store the object.
 
         self.store.set_event(identity, self.uid, to_node(
@@ -49,6 +64,21 @@
 
         return True
 
+    def _remove(self, objtype, from_organiser=True):
+
+        "Remove free/busy information for any unprocessed object."
+
+        item = self._get_identity(objtype, from_organiser)
+        if not item:
+            return False
+
+        identity, attr = item
+
+        freebusy = self.store.get_freebusy(identity) or []
+        self.remove_from_freebusy(freebusy, identity)
+
+        return True
+
 class Event(PersonHandler):
 
     "An event handler."
@@ -57,7 +87,7 @@
         pass
 
     def cancel(self):
-        pass
+        self._remove("VEVENT", True)
 
     def counter(self):
         pass
@@ -98,7 +128,7 @@
         pass
 
     def cancel(self):
-        pass
+        self._remove("VJOURNAL", True)
 
     def publish(self):
         self._record("VJOURNAL", True)
@@ -111,7 +141,7 @@
         pass
 
     def cancel(self):
-        pass
+        self._remove("VTODO", True)
 
     def counter(self):
         pass