Limnoria/plugins/Fediverse/utils.py
2022-07-20 17:57:29 +02:00

64 lines
2.5 KiB
Python

###
# Copyright (c) 2022, Valentin Lorentz
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
import re
import datetime
# Credits for the regexp and function: https://stackoverflow.com/a/2765366/539465
_XSD_DURATION_RE = re.compile(
"(?P<sign>-?)P"
"(?:(?P<years>\d+)Y)?"
"(?:(?P<months>\d+)M)?"
"(?:(?P<days>\d+)D)?"
"(?:T(?:(?P<hours>\d+)H)?(?:(?P<minutes>\d+)M)?(?:(?P<seconds>\d+)S)?)?"
)
def parse_xsd_duration(s):
"""Parses this format to a timedelta:
https://www.w3.org/TR/xmlschema11-2/#duration"""
# Fetch the match groups with default value of 0 (not None)
duration = _XSD_DURATION_RE.match(s).groupdict(0)
# Create the timedelta object from extracted groups
delta = datetime.timedelta(
days=int(duration["days"])
+ (int(duration["months"]) * 30)
+ (int(duration["years"]) * 365),
hours=int(duration["hours"]),
minutes=int(duration["minutes"]),
seconds=int(duration["seconds"]),
)
if duration["sign"] == "-":
delta *= -1
return delta