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author | cmlenz |
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date | Mon, 03 Jul 2006 18:53:27 +0000 |
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# -*- coding: utf-8 -*- # # Copyright (C) 2003-2006 Edgewall Software # Copyright (C) 2003-2004 Jonas Borgström <jonas@edgewall.com> # Copyright (C) 2006 Matthew Good <trac@matt-good.net> # Copyright (C) 2005-2006 Christian Boos <cboos@neuf.fr> # All rights reserved. # # This software is licensed as described in the file COPYING, which # you should have received as part of this distribution. The terms # are also available at http://trac.edgewall.com/license.html. # # This software consists of voluntary contributions made by many # individuals. For exact contribution history, see the revision # history and logs, available at http://projects.edgewall.com/trac/. # # Author: Jonas Borgström <jonas@edgewall.com> # Matthew Good <trac@matt-good.net> import locale import sys import time # Date/time utilities def pretty_timedelta(time1, time2=None, resolution=None): """Calculate time delta (inaccurately, only for decorative purposes ;-) for prettyprinting. If time1 is None, the current time is used.""" if not time1: time1 = time.time() if not time2: time2 = time.time() if time1 > time2: time2, time1 = time1, time2 units = ((3600 * 24 * 365, 'year', 'years'), (3600 * 24 * 30, 'month', 'months'), (3600 * 24 * 7, 'week', 'weeks'), (3600 * 24, 'day', 'days'), (3600, 'hour', 'hours'), (60, 'minute', 'minutes')) age_s = int(time2 - time1) if resolution and age_s < resolution: return '' if age_s < 60: return '%i second%s' % (age_s, age_s != 1 and 's' or '') for u, unit, unit_plural in units: r = float(age_s) / float(u) if r >= 0.9: r = int(round(r)) return '%d %s' % (r, r == 1 and unit or unit_plural) return '' def format_datetime(t=None, format='%x %X', gmt=False): if t is None: t = time.time() if not isinstance(t, (list, tuple, time.struct_time)): if gmt: t = time.gmtime(int(t)) else: t = time.localtime(int(t)) text = time.strftime(format, t) encoding = locale.getpreferredencoding() if sys.platform != 'win32': encoding = locale.getlocale(locale.LC_TIME)[1] or encoding # the above is broken on win32, e.g. we'd get '437' instead of 'cp437' return unicode(text, encoding, 'replace') def format_date(t=None, format='%x', gmt=False): return format_datetime(t, format, gmt) def format_time(t=None, format='%X', gmt=False): return format_datetime(t, format, gmt) def get_date_format_hint(): t = time.localtime(0) t = (1999, 10, 29, t[3], t[4], t[5], t[6], t[7], t[8]) tmpl = format_date(t) return tmpl.replace('1999', 'YYYY', 1).replace('99', 'YY', 1) \ .replace('10', 'MM', 1).replace('29', 'DD', 1) def get_datetime_format_hint(): t = time.localtime(0) t = (1999, 10, 29, 23, 59, 58, t[6], t[7], t[8]) tmpl = format_datetime(t) return tmpl.replace('1999', 'YYYY', 1).replace('99', 'YY', 1) \ .replace('10', 'MM', 1).replace('29', 'DD', 1) \ .replace('23', 'hh', 1).replace('59', 'mm', 1) \ .replace('58', 'ss', 1) def http_date(t=None): """Format t as a rfc822 timestamp""" if t is None: t = time.time() if not isinstance(t, (list, tuple, time.struct_time)): t = time.gmtime(int(t)) weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'] return '%s, %02d %s %04d %02d:%02d:%02d GMT' % ( weekdays[t.tm_wday], t.tm_mday, months[t.tm_mon - 1], t.tm_year, t.tm_hour, t.tm_min, t.tm_sec) def parse_date(text): seconds = None text = text.strip() for format in ['%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c', '%b %d, %Y']: try: date = time.strptime(text, format) seconds = time.mktime(date) break except ValueError: continue if seconds == None: raise ValueError, '%s is not a known date format.' % text return seconds