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# Copyright (C) 2010-2020 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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"""
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Provides utilities around date and time handling
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"""
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import datetime
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import time
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def makedate():
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lt = time.localtime()
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if lt[8] == 1 and time.daylight:
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tz = time.altzone
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else:
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tz = time.timezone
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return time.mktime(lt), tz
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def utcdate_fromtimestamp(unixts, tzoffset=0):
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"""
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Makes a local datetime object out of unix timestamp
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:param unixts:
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:param tzoffset:
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"""
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return datetime.datetime.utcfromtimestamp(float(unixts))
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def date_astimestamp(value):
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"""
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Convert a given `datetime.datetime` into a `float` like `time.time`
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"""
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return time.mktime(value.timetuple()) + value.microsecond / 1E6
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def date_to_timestamp_plus_offset(value):
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"""
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Convert a given `datetime.datetime` into a unix timestamp and offset.
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"""
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# TODO: johbo: The time handling looks quite fragile here since we mix
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# system time zones with naive datetime instances.
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if value is None:
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value = time.time()
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elif isinstance(value, datetime.datetime):
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assert not is_aware(value), (
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"This code is not prepared to handle aware datetime instances")
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value = date_astimestamp(value)
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return (value, time.timezone)
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def is_aware(value):
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"""
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Determines if a given datetime.time is aware.
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The logic is described in Python's docs:
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http://docs.python.org/library/datetime.html#datetime.tzinfo
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"""
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return (value.tzinfo is not None
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and value.tzinfo.utcoffset(value) is not None)
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