add method to find an agenda url for an event

tabellio/agenda/event.py

@@ -6,6 +6,7 @@ from zope import schema
 from zope.interface import implements
 from Products.Five.browser import BrowserView
 from Products.CMFCore.utils import getToolByName
+from Acquisition import aq_parent
 
 from zope.i18n.locales import locales
 from plone.directives import form, dexterity
@@ -62,6 +63,17 @@ class BaseEvent(Item):
     def end_hour(self):
         return '%dh%02d' % (self.end.hour, self.end.minute)
 
+    def agenda_url(self):
+        parent = aq_parent(self)
+        if parent.portal_type == 'tabellio.agenda.folder':
+            return parent.absolute_url()
+        catalog = getToolByName(self, 'portal_catalog')
+        try:
+            return catalog(portal_type='tabellio.agenda.folder')[0].getURL()
+        except IndexError:
+            return '#'
+
+
     def listen_url(self):
         return '#'
 
@@ -74,8 +86,6 @@ class Event(BaseEvent):
 
 class EventBaseView:
     def next_event_url(self, portal_type=None):
-        catalog = getToolByName(self.context, 'portal_catalog')
-
         # do not go more than 100 days in the future
         end = self.context.start + datetime.timedelta(100)
         start = self.context.start
@@ -96,8 +106,6 @@ class EventBaseView:
         return None
 
     def previous_event_url(self, portal_type=None):
-        catalog = getToolByName(self.context, 'portal_catalog')
-
         end = self.context.start
         # do not go back more than 100 days in the past
         start = self.context.start - datetime.timedelta(100)