mirror of https://github.com/zulip/zulip.git
43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
import calendar
|
|
import datetime
|
|
|
|
|
|
class TimezoneNotUTCException(Exception):
|
|
pass
|
|
|
|
def verify_UTC(dt: datetime.datetime) -> None:
|
|
if dt.tzinfo is None or dt.tzinfo.utcoffset(dt) != datetime.timezone.utc.utcoffset(dt):
|
|
raise TimezoneNotUTCException(f"Datetime {dt} does not have a UTC timezone.")
|
|
|
|
def convert_to_UTC(dt: datetime.datetime) -> datetime.datetime:
|
|
if dt.tzinfo is None:
|
|
return dt.replace(tzinfo=datetime.timezone.utc)
|
|
return dt.astimezone(datetime.timezone.utc)
|
|
|
|
def floor_to_hour(dt: datetime.datetime) -> datetime.datetime:
|
|
verify_UTC(dt)
|
|
return datetime.datetime(*dt.timetuple()[:4], tzinfo=datetime.timezone.utc)
|
|
|
|
def floor_to_day(dt: datetime.datetime) -> datetime.datetime:
|
|
verify_UTC(dt)
|
|
return datetime.datetime(*dt.timetuple()[:3], tzinfo=datetime.timezone.utc)
|
|
|
|
def ceiling_to_hour(dt: datetime.datetime) -> datetime.datetime:
|
|
floor = floor_to_hour(dt)
|
|
if floor == dt:
|
|
return floor
|
|
return floor + datetime.timedelta(hours=1)
|
|
|
|
def ceiling_to_day(dt: datetime.datetime) -> datetime.datetime:
|
|
floor = floor_to_day(dt)
|
|
if floor == dt:
|
|
return floor
|
|
return floor + datetime.timedelta(days=1)
|
|
|
|
def timestamp_to_datetime(timestamp: float) -> datetime.datetime:
|
|
return datetime.datetime.fromtimestamp(float(timestamp), tz=datetime.timezone.utc)
|
|
|
|
def datetime_to_timestamp(dt: datetime.datetime) -> int:
|
|
verify_UTC(dt)
|
|
return calendar.timegm(dt.timetuple())
|