Add videoconference sync and fix some bugs:

- Properly synchronize the timezone for users with timezones set in Odoo
- Properly synchronize attendees, i.e. remove the organizer from the
  attendees list on the CalDAV server and re-add them on the event
  attendees in Odoo (to show up in the calendar view).

caldav_sync/__manifest__.py

@@ -8,7 +8,7 @@
 
 {
     'name': 'CalDAV Synchronization',
-    'version': '17.0.0.5.2',
+    'version': '17.0.0.5.3',
     'license': 'LGPL-3',
     'category': 'Productivity',
     'summary': 'Synchronize Odoo Calendar Events with CalDAV Servers',
@@ -20,6 +20,9 @@
     'author': 'Bemade Inc.',
     'website': 'https://www.bemade.org',
     'depends': ['base', 'calendar'],
+    'external_dependencies': {
+        'python': ['caldav', 'icalendar', 'bs4'],
+    },
     'images': ['static/description/images/main_screenshot.png'],
     'data': [
         'views/res_users_views.xml',

caldav_sync/models/calendar_event.py

@@ -2,12 +2,13 @@ import uuid
 from odoo import models, api, fields
 import caldav
 import logging
-from datetime import datetime
-from icalendar import Calendar, Event, vCalAddress, Alarm, vText, vWeekday
+from datetime import datetime, timezone
+from icalendar import Calendar, Event, vCalAddress, vText, vWeekday
 from bs4 import BeautifulSoup
 from datetime import timedelta
 import dateutil
 import re
+from pytz import timezone, utc
 
 _logger = logging.getLogger(__name__)
 
@@ -143,16 +144,32 @@ class CalendarEvent(models.Model):
         calendar.add('version', '2.0')
 
         for event in self:
+            user_tz = timezone('UTC')
+            if event.user_id.tz:
+                user_tz = timezone(event.user_id.tz)
             ical_event = Event()
             ical_event.add('uid', event.caldav_uid)
-            ical_event.add('dtstamp', event.write_date.replace(tzinfo=None))
+            ical_event.add('dtstamp', utc.localize(event.write_date).astimezone(user_tz))
             if event.name:
                 ical_event.add('summary', event.name)
-            if event.description:
-                ical_event.add('description', event.description)
+            if event.description and self._html_to_text(event.description):
+                ical_event.add('description', self._html_to_text(event.description))
             if event.location:
                 ical_event.add('location', event.location)
-
+            if event.videocall_location:
+                ical_event.add('CONFERENCE', event.videocall_location)
+            for partner in event.partner_ids:
+                if partner == event.user_id.partner_id:
+                    continue
+                attendee = vCalAddress(f'MAILTO:{partner.email}')
+                attendee.params['cn'] = vText(partner.name)
+                attendee_record = self.env['calendar.attendee'].search([('event_id', '=', event.id), ('partner_id', '=', partner.id)], limit=1)
+                if attendee_record:
+                    attendee.params['partstat'] = vText(self._map_attendee_status(attendee_record.state))
+                ical_event.add('attendee', attendee, encode=0)
+            organizer = vCalAddress(f"MAILTO:{event.user_id.email}")
+            organizer.params['cn'] = event.user_id.name
+            ical_event.add('organizer', organizer)
             # Add RRULE if the event is recurrent
             if event.recurrency and event.recurrence_id:
                 rrule = event.recurrence_id._get_rrule()
@@ -160,8 +177,8 @@ class CalendarEvent(models.Model):
                 ical_event.add('rrule', rrule_dict)
 
             # Add DTSTART and DTEND
-            ical_event.add('dtstart', event.start.replace(tzinfo=None))
-            ical_event.add('dtend', event.stop.replace(tzinfo=None))
+            ical_event.add('dtstart', utc.localize(event.start).astimezone(user_tz))
+            ical_event.add('dtend', utc.localize(event.stop).astimezone(user_tz))
 
             calendar.add_component(ical_event)
 
@@ -269,7 +286,6 @@ class CalendarEvent(models.Model):
 
     def sync_event_from_ical(self, ical_event):
         email_regex = re.compile(r'[a-z0-9\.\-+_]+@[a-z0-9\.\-+_]+\.[a-z]+')
-        now = datetime.now()
         current_user_email = self.env.user.email.lower()
 
         for component in ical_event.subcomponents:
@@ -300,16 +316,18 @@ class CalendarEvent(models.Model):
                 existing_instance = self._get_existing_instance(uid, recurrence_id)
                 start = component.decoded('dtstart')
                 if isinstance(start, datetime):
-                    start = start.replace(tzinfo=None)
+                    start = start.astimezone(utc).replace(tzinfo=None)
                 end = component.decoded('dtend')
                 if isinstance(end, datetime):
-                    end = end.replace(tzinfo=None)
+                    end = end.astimezone(utc).replace(tzinfo=None)
+
                 values = {
                     'name': str(component.get('summary')),
                     'start': start,
                     'stop': end,
-                    'description': str(component.get('description')),
-                    'location': str(component.get('location')),
+                    'description': self._extract_component_text(component, 'description'),
+                    'location': self._extract_component_text(component, 'location'),
+                    'videocall_location': self._extract_component_text(component, 'conference'),
                     'caldav_uid': uid,
                     'partner_ids': [(6, 0, attendee_ids.ids)],
                 }
@@ -328,6 +346,10 @@ class CalendarEvent(models.Model):
                         })
                     existing_instance.with_context({'caldav_no_sync': True}).write(values)
 
+    @staticmethod
+    def _extract_component_text(component, subcomponent_name):
+        text = str(component.get(subcomponent_name))
+        text = text if text != 'None' else ''
 
     @staticmethod
     def _html_to_text(html):