[FIX] calendar_import_ics: convert other tz to UTC

calendar_import_ics/tests/sample_files/test_calendar.ics

@@ -16,9 +16,9 @@ TRANSP:OPAQUE
 UID:ed27f2b89f945c7692547a2903c20cbe80de6cc6
 END:VEVENT
 BEGIN:VEVENT
-DTEND:20061011T190000Z
+DTEND;TZID=America/Denver:20061011T190000
 DTSTAMP:20240221T094129Z
-DTSTART:20061011T160000Z
+DTSTART;TZID=America/Denver:20061011T160000
 SEQUENCE:0
 SUMMARY:Unavailable
 TRANSP:OPAQUE

calendar_import_ics/wizards/wizard_import_ics.py

@@ -4,6 +4,9 @@
 import base64
 from datetime import datetime
 
+import pytz
+from dateutil import parser
+
 from odoo import _, fields, models
 from odoo.exceptions import ValidationError
 
@@ -42,6 +45,8 @@ def button_import(self):
         lines = file_str.split("\n")
         ics_event = {}
         for line in lines:
+            if line.startswith(("DTSTART", "DTEND")) and "TZID=" in line:
+                line = self.convert_date_to_z(line)
             if line.startswith("BEGIN:VEVENT"):
                 ics_event = {}
             elif line.startswith("END:VEVENT"):
@@ -116,3 +121,16 @@ def _delete_non_imported_events(self, imported_events):
             non_imported_event.write({"partner_ids": [(3, self.partner_id.id)]})
         if not non_imported_events.partner_ids:
             non_imported_events.unlink()
+
+    def convert_date_to_z(self, line):
+        split_parts = line.split(":")
+        event_phase = split_parts[0].split(";TZID=")[0]
+        tz_id = split_parts[0].split(";TZID=")[1]
+        date = split_parts[1]
+
+        date_obj = parser.parse(date)
+        tz = pytz.timezone(tz_id)
+
+        utc_date = tz.localize(date_obj).astimezone(pytz.UTC)
+        utc_date_string = utc_date.strftime(event_phase + ":%Y%m%dT%H%M%SZ")
+        return utc_date_string