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# This file is part of Tryton. The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
import logging
import os
try:
import zoneinfo
ZoneInfo = zoneinfo.ZoneInfo
ZoneInfoNotFoundError = zoneinfo.ZoneInfoNotFoundError
except ImportError:
zoneinfo = None
import pytz
from dateutil.tz import gettz as ZoneInfo
class ZoneInfoNotFoundError(KeyError):
pass
__all__ = ['SERVER', 'UTC', 'get_tzinfo', 'available_timezones']
logger = logging.getLogger(__name__)
_ALL_ZONES = None
def available_timezones():
global _ALL_ZONES
if not _ALL_ZONES:
if zoneinfo:
_ALL_ZONES = zoneinfo.available_timezones()
else:
_ALL_ZONES = set(pytz.all_timezones)
return set(_ALL_ZONES)
def get_tzinfo(zoneid):
try:
zi = ZoneInfo(zoneid)
if not zi:
raise ZoneInfoNotFoundError
except ZoneInfoNotFoundError:
logger.warning("Timezone %s not found falling back to UTC", zoneid)
zi = UTC
return zi
UTC = ZoneInfo('UTC')
SERVER = get_tzinfo(os.environ['TRYTOND_TZ'])
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