# -*- coding: utf-8 -*-
#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2004-2006 Donald N. Allingham
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# $Id: _DateParser.py 8359 2007-04-06 04:34:48Z dallingham $
"""
Date parsing class. Serves as the base class for any localized
date parsing class. The default, base class provides parsing for
English.
"""
__author__ = "Donald N. Allingham"
__version__ = "$Revision: 8359 $"
#-------------------------------------------------------------------------
#
# Python modules
#
#-------------------------------------------------------------------------
import re
import calendar
#-------------------------------------------------------------------------
#
# set up logging
#
#-------------------------------------------------------------------------
import logging
log = logging.getLogger(".DateParser")
#-------------------------------------------------------------------------
#
# GRAMPS modules
#
#-------------------------------------------------------------------------
from RelLib import Date, DateError
import GrampsLocale
#-------------------------------------------------------------------------
#
# Top-level module functions
#
#-------------------------------------------------------------------------
_max_days = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ]
_leap_days = [ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ]
def gregorian_valid(date_tuple):
day = date_tuple[0]
month = date_tuple[1]
valid = True
try:
if month > 12:
valid = False
elif calendar.isleap(date_tuple[2]):
if day > _leap_days[month-1]:
valid = False
elif day > _max_days[month-1]:
valid = False
except:
valid = False
return valid
#-------------------------------------------------------------------------
#
# Parser class
#
#-------------------------------------------------------------------------
class DateParser:
"""
Converts a text string into a Date object. If the date cannot be
converted, the text string is assigned.
"""
_fmt_parse = re.compile(".*%(\S).*%(\S).*%(\S).*")
# RFC-2822 only uses capitalized English abbreviated names, no locales.
_rfc_days = ('Sun','Mon','Tue','Wed','Thu','Fri','Sat')
_rfc_mons_to_int = {
'Jan' : 1, 'Feb' : 2, 'Mar' : 3, 'Apr' : 4,
'May' : 5, 'Jun' : 6, 'Jul' : 7, 'Aug' : 8,
'Sep' : 9, 'Oct' : 10, 'Nov' : 11, 'Dec' : 12,
}
month_to_int = GrampsLocale.month_to_int
# modifiers before the date
modifier_to_int = {
'before' : Date.MOD_BEFORE, 'bef' : Date.MOD_BEFORE,
'bef.' : Date.MOD_BEFORE, 'after' : Date.MOD_AFTER,
'aft' : Date.MOD_AFTER, 'aft.' : Date.MOD_AFTER,
'about' : Date.MOD_ABOUT, 'abt.' : Date.MOD_ABOUT,
'abt' : Date.MOD_ABOUT, 'circa' : Date.MOD_ABOUT,
'c.' : Date.MOD_ABOUT, 'around' : Date.MOD_ABOUT,
}
# in some languages some of above listed modifiers are after the date,
# in that case the subclass should put them into this dictionary instead
modifier_after_to_int = {}
hebrew_to_int = {
"tishri" : 1, "heshvan" : 2, "kislev" : 3,
"tevet" : 4, "shevat" : 5, "adari" : 6,
"adarii" : 7, "nisan" : 8, "iyyar" : 9,
"sivan" : 10, "tammuz" : 11, "av" : 12,
"elul" : 13,
}
french_to_int = {
u'vendémiaire' : 1, u'brumaire' : 2,
u'frimaire' : 3, u'nivôse': 4,
u'pluviôse' : 5, u'ventôse' : 6,
u'germinal' : 7, u'floréal' : 8,
u'prairial' : 9, u'messidor' : 10,
u'thermidor' : 11, u'fructidor' : 12,
u'extra' : 13
}
islamic_to_int = {
"muharram" : 1, "muharram ul haram" : 1,
"safar" : 2, "rabi`al-awwal" : 3,
"rabi'l" : 3, "rabi`ul-akhir" : 4,
"rabi`ath-thani" : 4, "rabi` ath-thani" : 4,
"rabi`al-thaany" : 4, "rabi` al-thaany" : 4,
"rabi' ii" : 4, "jumada l-ula" : 5,
"jumaada-ul-awwal" : 5, "jumaada i" : 5,
"jumada t-tania" : 6, "jumaada-ul-akhir" : 6,
"jumaada al-thaany" : 6, "jumaada ii" : 5,
"rajab" : 7, "sha`ban" : 8,
"sha`aban" : 8, "ramadan" : 9,
"ramadhan" : 9, "shawwal" : 10,
"dhu l-qa`da" : 11, "dhu qadah" : 11,
"thw al-qi`dah" : 11, "dhu l-hijja" : 12,
"dhu hijja" : 12, "thw al-hijjah" : 12,
}
persian_to_int = {
"farvardin" : 1, "ordibehesht" : 2,
"khordad" : 3, "tir" : 4,
"mordad" : 5, "shahrivar" : 6,
"mehr" : 7, "aban" : 8,
"azar" : 9, "dey" : 10,
"bahman" : 11, "esfand" : 12,
}
bce = ["B.C.E.", "B.C.E", "BCE", "B.C.", "B.C", "BC" ]
calendar_to_int = {
'gregorian' : Date.CAL_GREGORIAN,
'g' : Date.CAL_GREGORIAN,
'julian' : Date.CAL_JULIAN,
'j' : Date.CAL_JULIAN,
'hebrew' : Date.CAL_HEBREW,
'h' : Date.CAL_HEBREW,
'islamic' : Date.CAL_ISLAMIC,
'i' : Date.CAL_ISLAMIC,
'french' : Date.CAL_FRENCH,
'french republican': Date.CAL_FRENCH,
'f' : Date.CAL_FRENCH,
'persian' : Date.CAL_PERSIAN,
'p' : Date.CAL_PERSIAN,
}
quality_to_int = {
'estimated' : Date.QUAL_ESTIMATED,
'est.' : Date.QUAL_ESTIMATED,
'est' : Date.QUAL_ESTIMATED,
'calc.' : Date.QUAL_CALCULATED,
'calc' : Date.QUAL_CALCULATED,
'calculated' : Date.QUAL_CALCULATED,
}
def __init__(self):
self.init_strings()
self.parser = {
Date.CAL_GREGORIAN : self._parse_greg_julian,
Date.CAL_JULIAN : self._parse_greg_julian,
Date.CAL_FRENCH : self._parse_french,
Date.CAL_PERSIAN : self._parse_persian,
Date.CAL_HEBREW : self._parse_hebrew,
Date.CAL_ISLAMIC : self._parse_islamic,
}
fmt = GrampsLocale.tformat
match = self._fmt_parse.match(fmt.lower())
if match:
self.dmy = (match.groups() == ('d','m','y'))
self.ymd = (match.groups() == ('y','m','d'))
else:
self.dmy = True
self.ymd = False
def re_longest_first(self, keys):
"""
returns a string for a RE group which contains the given keys
sorted so that longest keys match first. Any '.' characters
are quoted.
"""
keys.sort(lambda x, y: cmp(len(y), len(x)))
return '(' + '|'.join([key.replace('.','\.') for key in keys]) + ')'
def init_strings(self):
"""
This method compiles regular expression strings for matching dates.
Most of the re's in most languages can stay as is. span and range
most likely will need to change. Whatever change is done, this method
may be called first as DateParser.init_strings(self) so that the
invariant expresions don't need to be repeteadly coded. All differences
can be coded after DateParser.init_strings(self) call, that way they
override stuff from this method. See DateParserRU() as an example.
"""
self._rfc_mon_str = '(' + '|'.join(self._rfc_mons_to_int.keys()) + ')'
self._rfc_day_str = '(' + '|'.join(self._rfc_days) + ')'
self._bce_str = self.re_longest_first(self.bce)
self._qual_str = self.re_longest_first(self.quality_to_int.keys())
self._mod_str = self.re_longest_first(self.modifier_to_int.keys())
self._mod_after_str = self.re_longest_first(
self.modifier_after_to_int.keys())
self._mon_str = self.re_longest_first(self.month_to_int.keys())
self._jmon_str = self.re_longest_first(self.hebrew_to_int.keys())
self._fmon_str = self.re_longest_first(self.french_to_int.keys())
self._pmon_str = self.re_longest_first(self.persian_to_int.keys())
self._imon_str = self.re_longest_first(self.islamic_to_int.keys())
self._cal_str = self.re_longest_first(self.calendar_to_int.keys())
# bce, calendar type and quality may be either at the end or at
# the beginning of the given date string, therefore they will
# be parsed from the middle and will be in match.group(2).
self._bce_re = re.compile("(.*)\s+%s( ?.*)" % self._bce_str)
self._cal = re.compile("(.*)\s+\(%s\)( ?.*)" % self._cal_str,
re.IGNORECASE)
self._qual = re.compile("(.* ?)%s\s+(.+)" % self._qual_str,
re.IGNORECASE)
self._span = re.compile("(from)\s+(?P<start>.+)\s+to\s+(?P<stop>.+)",
re.IGNORECASE)
self._range = re.compile("(bet|bet.|between)\s+(?P<start>.+)\s+and\s+(?P<stop>.+)",
re.IGNORECASE)
self._modifier = re.compile('%s\s+(.*)' % self._mod_str,
re.IGNORECASE)
self._modifier_after = re.compile('(.*)\s+%s' % self._mod_after_str,
re.IGNORECASE)
self._abt2 = re.compile('<(.*)>',re.IGNORECASE)
self._text = re.compile('%s\s+(\d+)?\s*,?\s*((\d+)(/\d+)?)?\s*$' % self._mon_str,
re.IGNORECASE)
self._text2 = re.compile('(\d+)?\s+?%s\s*((\d+)(/\d+)?)?\s*$' % self._mon_str,
re.IGNORECASE)
self._jtext = re.compile('%s\s+(\d+)?\s*,?\s*((\d+)(/\d+)?)?\s*$' % self._jmon_str,
re.IGNORECASE)
self._jtext2 = re.compile('(\d+)?\s+?%s\s*((\d+)(/\d+)?)?\s*$' % self._jmon_str,
re.IGNORECASE)
self._ftext = re.compile('%s\s+(\d+)?\s*,?\s*((\d+)(/\d+)?)?\s*$' % self._fmon_str,
re.IGNORECASE)
self._ftext2 = re.compile('(\d+)?\s+?%s\s*((\d+)(/\d+)?)?\s*$' % self._fmon_str,
re.IGNORECASE)
self._ptext = re.compile('%s\s+(\d+)?\s*,?\s*((\d+)(/\d+)?)?\s*$' % self._pmon_str,
re.IGNORECASE)
self._ptext2 = re.compile('(\d+)?\s+?%s\s*((\d+)(/\d+)?)?\s*$' % self._pmon_str,
re.IGNORECASE)
self._itext = re.compile('%s\s+(\d+)?\s*,?\s*((\d+)(/\d+)?)?\s*$' % self._imon_str,
re.IGNORECASE)
self._itext2 = re.compile('(\d+)?\s+?%s\s*((\d+)(/\d+)?)?\s*$' % self._imon_str,
re.IGNORECASE)
self._numeric = re.compile("((\d+)[/\.]\s*)?((\d+)[/\.]\s*)?(\d+)\s*$")
self._iso = re.compile("(\d+)(/(\d+))?-(\d+)-(\d+)\s*$")
self._rfc = re.compile("(%s,)?\s+(\d|\d\d)\s+%s\s+(\d+)\s+\d\d:\d\d(:\d\d)?\s+(\+|-)\d\d\d\d"
% (self._rfc_day_str,self._rfc_mon_str))
def _get_int(self,val):
"""
Converts the string to an integer if the value is not None. If the
value is None, a zero is returned
"""
if val == None:
return 0
else:
return int(val)
def _parse_hebrew(self, text):
return self._parse_calendar(text, self._jtext, self._jtext2,
self.hebrew_to_int)
def _parse_islamic(self, text):
return self._parse_calendar(text, self._itext, self._itext2,
self.islamic_to_int)
def _parse_persian(self, text):
return self._parse_calendar(text, self._ptext, self._ptext2,
self.persian_to_int)
def _parse_french(self, text):
return self._parse_calendar(text, self._ftext, self._ftext2,
self.french_to_int)
def _parse_greg_julian(self, text):
return self._parse_calendar(text, self._text, self._text2,
self.month_to_int, gregorian_valid)
def _parse_calendar(self, text, regex1, regex2, mmap, check=None):
match = regex1.match(text.lower())
if match:
groups = match.groups()
if groups[0] == None:
m = 0
else:
m = mmap[groups[0].lower()]
if groups[2] == None:
y = self._get_int(groups[1])
d = 0
s = False
else:
d = self._get_int(groups[1])
y = int(groups[3])
s = groups[4] != None
value = (d, m, y, s)
if check and not check((d, m, y)):
value = Date.EMPTY
return value
match = regex2.match(text.lower())
if match:
groups = match.groups()
if groups[1] == None:
m = 0
else:
m = mmap[groups[1].lower()]
d = self._get_int(groups[0])
if groups[2] == None:
y = None
s = False
else:
y = int(groups[3])
s = groups[4] != None
value = (d, m, y, s)
if check and not check((d, m, y)):
value = Date.EMPTY
return value
return Date.EMPTY
def _parse_subdate(self, text, subparser=None):
"""
Converts only the date portion of a date.
"""
if subparser == None:
subparser = self._parse_greg_julian
if subparser == self._parse_greg_julian:
check = gregorian_valid
else:
check = None
value = subparser(text)
if value != Date.EMPTY:
return value
match = self._iso.match(text)
if match:
groups = match.groups()
y = self._get_int(groups[0])
m = self._get_int(groups[3])
d = self._get_int(groups[4])
if check and not check((d, m, y)):
return Date.EMPTY
if groups[2]:
return (d, m, y,True)
else:
return (d, m, y,False)
match = self._rfc.match(text)
if match:
groups = match.groups()
d = self._get_int(groups[2])
m = self._rfc_mons_to_int[groups[3]]
y = self._get_int(groups[4])
value = (d, m, y, False)
if check and not check((d, m, y)):
value = Date.EMPTY
return value
match = self._numeric.match(text)
if match:
groups = match.groups()
if self.ymd:
# '1789' and ymd: incomplete date
if groups[1] == None:
y = self._get_int(groups[4])
m = 0
d = 0
else:
y = self._get_int(groups[1])
m = self._get_int(groups[3])
d = self._get_int(groups[4])
else:
y = self._get_int(groups[4])
if self.dmy:
m = self._get_int(groups[3])
d = self._get_int(groups[1])
else:
m = self._get_int(groups[1])
d = self._get_int(groups[3])
value = (d,m,y,False)
if check and not check((d,m,y)):
value = Date.EMPTY
return value
return Date.EMPTY
def match_calendar(self, text, cal):
"""
Try parsing calendar.
Return calendar index and the text with calendar removed.
"""
match = self._cal.match(text)
if match:
cal = self.calendar_to_int[match.group(2).lower()]
text = match.group(1) + match.group(3)
return (text,cal)
def match_quality(self, text, qual):
"""
Try matching quality.
Return quality index and the text with quality removed.
"""
match = self._qual.match(text)
if match:
qual = self.quality_to_int[match.group(2).lower()]
text = match.group(1) + match.group(3)
return (text,qual)
def match_span(self, text, cal, qual, date):
"""
Try matching span date.
On success, set the date and return 1. On failure return 0.
"""
match = self._span.match(text)
if match:
text_parser = self.parser[cal]
(text1,bc1) = self.match_bce(match.group('start'))
start = self._parse_subdate(text1,text_parser)
if bc1:
start = self.invert_year(start)
(text2,bc2) = self.match_bce(match.group('stop'))
stop = self._parse_subdate(text2, text_parser)
if bc2:
stop = self.invert_year(stop)
date.set(qual, Date.MOD_SPAN, cal, start + stop)
return 1
return 0
def match_range(self, text, cal, qual, date):
"""
Try matching range date.
On success, set the date and return 1. On failure return 0.
"""
match = self._range.match(text)
if match:
text_parser = self.parser[cal]
(text1,bc1) = self.match_bce(match.group('start'))
start = self._parse_subdate(text1, text_parser)
if bc1:
start = self.invert_year(start)
(text2,bc2) = self.match_bce(match.group('stop'))
stop = self._parse_subdate(text2, text_parser)
if bc2:
stop = self.invert_year(stop)
date.set(qual, Date.MOD_RANGE, cal, start + stop)
return 1
return 0
def match_bce(self, text):
"""
Try matching BCE qualifier.
Return BCE (True/False) and the text with matched part removed.
"""
match = self._bce_re.match(text)
bc = False
if match:
# bce is in the match.group(2)
try:
text = match.group(1) + match.group(3)
except:
print "MATCH:", match.groups()
bc = True
return (text, bc)
def match_modifier(self, text, cal, qual, bc, date):
"""
Try matching date with modifier.
On success, set the date and return 1. On failure return 0.
"""
# modifiers before the date
match = self._modifier.match(text)
if match:
grps = match.groups()
start = self._parse_subdate(grps[1], self.parser[cal])
mod = self.modifier_to_int.get(grps[0].lower(), Date.MOD_NONE)
if start == Date.EMPTY:
date.set_modifier(Date.MOD_TEXTONLY)
date.set_text_value(text)
elif bc:
date.set(qual, mod, cal, self.invert_year(start))
else:
date.set(qual, mod, cal, start)
return True
# modifiers after the date
if self.modifier_after_to_int:
match = self._modifier_after.match(text)
if match:
grps = match.groups()
start = self._parse_subdate(grps[0], self.parser[cal])
mod = self.modifier_after_to_int.get(grps[1].lower(),
Date.MOD_NONE)
if bc:
date.set(qual, mod, cal, self.invert_year(start))
else:
date.set(qual, mod, cal, start)
return True
match = self._abt2.match(text)
if match:
grps = match.groups()
start = self._parse_subdate(grps[0])
mod = Date.MOD_ABOUT
if bc:
date.set(qual, mod, cal, self.invert_year(start))
else:
date.set(qual, mod, cal, start)
return True
return False
def set_date(self, date, text):
"""
Parses the text and sets the date according to the parsing.
"""
date.set_text_value(text)
qual = Date.QUAL_NONE
cal = Date.CAL_GREGORIAN
(text, cal) = self.match_calendar(text, cal)
(text, qual) = self.match_quality(text, qual)
if self.match_span(text, cal, qual, date):
return
if self.match_range(text, cal, qual, date):
return
(text,bc) = self.match_bce(text)
if self.match_modifier(text, cal, qual, bc, date):
return
try:
subdate = self._parse_subdate(text, self.parser[cal])
if subdate == Date.EMPTY and text != "":
date.set_as_text(text)
return
except:
date.set_as_text(text)
return
if bc:
date.set(qual, Date.MOD_NONE, cal, self.invert_year(subdate))
else:
date.set(qual, Date.MOD_NONE, cal, subdate)
def invert_year(self, subdate):
return (subdate[0] ,subdate[1], -subdate[2], subdate[3])
def parse(self, text):
"""
Parses the text, returning a Date object.
"""
new_date = Date()
try:
self.set_date(new_date, text)
except DateError:
new_date.set_as_text(text)
return new_date
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