selfprivacy-rest-api/selfprivacy_api/utils/timeutils.py

51 lines
1.2 KiB
Python
Raw Normal View History

2023-11-10 12:19:32 +00:00
from datetime import datetime, timezone
2023-11-10 13:05:38 +00:00
def ensure_tz_aware(dt: datetime) -> datetime:
"""
returns timezone-aware datetime
assumes utc on naive datetime input
"""
if dt.tzinfo is None:
dt = dt.astimezone(timezone.utc)
return dt
def ensure_tz_aware_strict(dt: datetime) -> datetime:
"""
returns timezone-aware datetime
raises error if input is a naive datetime
"""
if dt.tzinfo is None:
raise ValueError(
"no timezone in datetime (tz-aware datetime is required for this operation)",
dt,
)
return dt
2023-11-10 12:19:32 +00:00
def tzaware_parse_time(iso_timestamp: str) -> datetime:
"""
parse an iso8601 timestamp into timezone-aware datetime
assume utc if no timezone in stamp
example of timestamp:
2023-11-10T12:07:47.868788+00:00
"""
dt = datetime.fromisoformat(iso_timestamp)
2023-11-10 13:05:38 +00:00
dt = ensure_tz_aware(dt)
2023-11-10 12:19:32 +00:00
return dt
def tzaware_parse_time_strict(iso_timestamp: str) -> datetime:
"""
parse an iso8601 timestamp into timezone-aware datetime
raise an error if no timezone in stamp
example of timestamp:
2023-11-10T12:07:47.868788+00:00
"""
dt = datetime.fromisoformat(iso_timestamp)
2023-11-10 13:05:38 +00:00
dt = ensure_tz_aware_strict(dt)
2023-11-10 12:19:32 +00:00
return dt