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134 lines
4.5 KiB
134 lines
4.5 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Date
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"""
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from dateutil import parser
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from rebulk.remodule import re
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_dsep = r'[-/ \.]'
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_dsep_bis = r'[-/ \.x]'
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date_regexps = [
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# pylint:disable=consider-using-f-string
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re.compile(r'%s((\d{8}))%s' % (_dsep, _dsep), re.IGNORECASE),
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# pylint:disable=consider-using-f-string
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re.compile(r'%s((\d{6}))%s' % (_dsep, _dsep), re.IGNORECASE),
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# pylint:disable=consider-using-f-string
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re.compile(r'(?:^|[^\d])((\d{2})%s(\d{1,2})%s(\d{1,2}))(?:$|[^\d])' % (_dsep, _dsep), re.IGNORECASE),
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# pylint:disable=consider-using-f-string
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re.compile(r'(?:^|[^\d])((\d{1,2})%s(\d{1,2})%s(\d{2}))(?:$|[^\d])' % (_dsep, _dsep), re.IGNORECASE),
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# pylint:disable=consider-using-f-string
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re.compile(r'(?:^|[^\d])((\d{4})%s(\d{1,2})%s(\d{1,2}))(?:$|[^\d])' % (_dsep_bis, _dsep), re.IGNORECASE),
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# pylint:disable=consider-using-f-string
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re.compile(r'(?:^|[^\d])((\d{1,2})%s(\d{1,2})%s(\d{4}))(?:$|[^\d])' % (_dsep, _dsep_bis), re.IGNORECASE),
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# pylint:disable=consider-using-f-string
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re.compile(r'(?:^|[^\d])((\d{1,2}(?:st|nd|rd|th)?%s(?:[a-z]{3,10})%s\d{4}))(?:$|[^\d])' % (_dsep, _dsep),
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# pylint:disable=consider-using-f-string
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re.IGNORECASE)]
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def valid_year(year):
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"""Check if number is a valid year"""
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return 1920 <= year < 2030
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def _is_int(string):
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"""
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Check if the input string is an integer
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:param string:
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:type string:
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:return:
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:rtype:
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"""
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try:
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int(string)
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return True
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except ValueError:
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return False
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def _guess_day_first_parameter(groups): # pylint:disable=inconsistent-return-statements
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"""
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If day_first is not defined, use some heuristic to fix it.
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It helps to solve issues with python dateutils 2.5.3 parser changes.
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:param groups: match groups found for the date
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:type groups: list of match objects
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:return: day_first option guessed value
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:rtype: bool
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"""
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# If match starts with a long year, then day_first is force to false.
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if _is_int(groups[0]) and valid_year(int(groups[0][:4])):
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return False
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# If match ends with a long year, the day_first is forced to true.
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if _is_int(groups[-1]) and valid_year(int(groups[-1][-4:])):
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return True
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# If match starts with a short year, then day_first is force to false.
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if _is_int(groups[0]) and int(groups[0][:2]) > 31:
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return False
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# If match ends with a short year, then day_first is force to true.
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if _is_int(groups[-1]) and int(groups[-1][-2:]) > 31:
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return True
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def search_date(string, year_first=None, day_first=None): # pylint:disable=inconsistent-return-statements
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"""Looks for date patterns, and if found return the date and group span.
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Assumes there are sentinels at the beginning and end of the string that
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always allow matching a non-digit delimiting the date.
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Year can be defined on two digit only. It will return the nearest possible
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date from today.
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>>> search_date(' This happened on 2002-04-22. ')
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(18, 28, datetime.date(2002, 4, 22))
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>>> search_date(' And this on 17-06-1998. ')
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(13, 23, datetime.date(1998, 6, 17))
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>>> search_date(' no date in here ')
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"""
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for date_re in date_regexps:
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search_match = date_re.search(string)
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if not search_match:
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continue
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start, end = search_match.start(1), search_match.end(1)
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groups = search_match.groups()[1:]
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match = '-'.join(groups)
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if match is None:
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continue
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if year_first and day_first is None:
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day_first = False
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if day_first is None:
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day_first = _guess_day_first_parameter(groups)
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# If day_first/year_first is undefined, parse is made using both possible values.
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yearfirst_opts = [False, True]
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if year_first is not None:
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yearfirst_opts = [year_first]
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dayfirst_opts = [True, False]
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if day_first is not None:
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dayfirst_opts = [day_first]
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kwargs_list = ({'dayfirst': d, 'yearfirst': y}
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for d in dayfirst_opts for y in yearfirst_opts)
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for kwargs in kwargs_list:
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try:
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date = parser.parse(match, **kwargs)
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except (ValueError, TypeError): # pragma: no cover
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# see https://bugs.launchpad.net/dateutil/+bug/1247643
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date = None
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# check date plausibility
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if date and valid_year(date.year): # pylint:disable=no-member
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return start, end, date.date() # pylint:disable=no-member
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