[ADD] create dav_calendar_sync addon

creates new addon dav_calendar_sync to synchronize caldav events on Odoo calendar

dav_calendar_sync/models/dav_calendar.py

@@ -0,0 +1,83 @@
+import logging
+from odoo import fields, models
+
+_logger = logging.getLogger(__name__)
+
+class DavCalendar(models.Model):
+    _name = "dav.calendar"
+    _description = "Dav calendar"
+
+    name = fields.Char('name')
+    url = fields.Char('url')
+    dav_server_id = fields.Many2one('dav.server', string='Dav Server')
+
+    sync_token = fields.Char("Synchronization Token")
+
+    active_sync_event = fields.Boolean('active_sync_event')
+    active_sync_todo = fields.Boolean('active_sync_todo')
+
+    def _manage_timezones(self, ical_event):
+        start = ical_event.get("DTSTART").dt
+        end = ical_event.get("DTEND").dt
+        # Odoo only uses naive dates, timezone data must be removed
+        # TODO: removing timezone data is not enough, naive dates must match the user timezone
+        if hasattr(start, "tzinfo"):
+            start = start.replace(tzinfo=None)
+        if hasattr(end, "tzinfo"):
+            end = start.replace(tzinfo=None)
+        return start, end
+
+    def _existing_event(self,ical_event):
+        calendar_events = self.env["calendar.event"].search([("dav_uid", "=", str(ical_event.get("UID")))])
+        if len(calendar_events) > 0:
+            return True
+        else:
+            return False   
+        
+    def _create_calendar_event(self, ical_event):
+        start, end = self._manage_timezones(ical_event)
+        values = {
+            "name":str(ical_event.get("SUMMARY")),
+            "start": start,
+            "stop": end,
+            "dav_calendar_id": self.id,
+            "dav_uid" : str(ical_event.get("UID")),
+        }
+        self.env["calendar.event"].create(values)
+
+    def _update_calendar_event(self, ical_event):
+        calendar_event = self.env["calendar.event"].search([("dav_uid", "=", str(ical_event.get("UID")))])[0]
+        start, end = self._manage_timezones(ical_event)
+        values = {
+            "name":str(ical_event.get("SUMMARY")),
+            "start": start,
+            "stop": end,
+        }
+        calendar_event.write(values)
+
+    def _delete_calendar_event(self, ical_event):
+        calendar_event = self.env["calendar.event"].search([("dav_uid", "=", str(ical_event.get("UID")))])[0]
+        calendar_event.unlink()
+
+    def sync_dav_events(self):
+        calendar = self.dav_server_id.get_principal().calendar(self.name)
+        if self.sync_token:
+            dav_events = calendar.objects_by_sync_token(self.sync_token, True)
+        else:
+            dav_events = calendar.objects_by_sync_token(load_objects=True)
+        event_created = 0
+        for dav_event in dav_events:
+            try:
+                ical_event = dav_event.icalendar_instance.subcomponents[0]
+                if dav_event.data is None:
+                    self._delete_calendar_event(ical_event)
+                elif self._existing_event(ical_event):
+                    self._update_calendar_event(ical_event)
+                else:
+                    self._create_calendar_event(ical_event)
+                    event_created += 1
+            except Exception as e: 
+                _logger.exception("SYNC FAILURE on following event: %s", dav_event.data)
+                continue
+        self.sync_token = dav_events.sync_token
+        _logger.debug("NB EVENT CREATED: %s", event_created)