Convert timezone-aware datetimes automatically to UTC (#485)

mvt/common/utils.py

@@ -53,20 +53,23 @@ def convert_chrometime_to_datetime(timestamp: int) -> datetime.datetime:
 def convert_datetime_to_iso(date_time: datetime.datetime) -> str:
     """Converts datetime to ISO string.
 
-    :param datetime: datetime.
+    :param datetime: datetime, naive or timezone aware
     :type datetime: datetime.datetime
     :returns: ISO datetime string in YYYY-mm-dd HH:MM:SS.ms format.
     :rtype: str
 
     """
     try:
+        if date_time.tzinfo:
+            # Timezone aware object - convert to UTC
+            date_time = date_time.astimezone(tz=datetime.UTC)
         return date_time.strftime("%Y-%m-%d %H:%M:%S.%f")
     except Exception:
         return ""
 
 
 def convert_unix_to_utc_datetime(
-    timestamp: Union[int, float, str]
+    timestamp: Union[int, float, str],
 ) -> datetime.datetime:
     """Converts a unix epoch timestamp to UTC datetime.
 

tests/common/test_utils.py

@@ -42,6 +42,14 @@ def test_convert_datetime_to_iso(self):
         converted = convert_unix_to_utc_datetime(TEST_DATE_EPOCH)
         assert convert_datetime_to_iso(converted) == TEST_DATE_ISO
 
+    def test_convert_timezone_aware_to_iso(self):
+        assert (
+            convert_datetime_to_iso(
+                datetime.strptime("2024-09-30 11:21:20+0200", "%Y-%m-%d %H:%M:%S%z")
+            )
+            == "2024-09-30 09:21:20.000000"
+        )
+
 
 class TestHashes:
     def test_hash_from_file(self):