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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2003-2006 Edgewall Software
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4 # Copyright (C) 2003-2004 Jonas Borgström <jonas@edgewall.com>
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5 # Copyright (C) 2006 Matthew Good <trac@matt-good.net>
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6 # Copyright (C) 2005-2006 Christian Boos <cboos@neuf.fr>
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7 # All rights reserved.
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8 #
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9 # This software is licensed as described in the file COPYING, which
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10 # you should have received as part of this distribution. The terms
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11 # are also available at http://trac.edgewall.com/license.html.
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12 #
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13 # This software consists of voluntary contributions made by many
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14 # individuals. For exact contribution history, see the revision
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15 # history and logs, available at http://projects.edgewall.com/trac/.
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16 #
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17 # Author: Jonas Borgström <jonas@edgewall.com>
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18 # Matthew Good <trac@matt-good.net>
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19
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20 import locale
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21 import sys
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22 import time
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23
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24 # Date/time utilities
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25
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26 def pretty_timedelta(time1, time2=None, resolution=None):
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27 """Calculate time delta (inaccurately, only for decorative purposes ;-) for
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28 prettyprinting. If time1 is None, the current time is used."""
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29 if not time1: time1 = time.time()
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30 if not time2: time2 = time.time()
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31 if time1 > time2:
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32 time2, time1 = time1, time2
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33 units = ((3600 * 24 * 365, 'year', 'years'),
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34 (3600 * 24 * 30, 'month', 'months'),
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35 (3600 * 24 * 7, 'week', 'weeks'),
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36 (3600 * 24, 'day', 'days'),
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37 (3600, 'hour', 'hours'),
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38 (60, 'minute', 'minutes'))
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39 age_s = int(time2 - time1)
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40 if resolution and age_s < resolution:
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41 return ''
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42 if age_s < 60:
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43 return '%i second%s' % (age_s, age_s != 1 and 's' or '')
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44 for u, unit, unit_plural in units:
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45 r = float(age_s) / float(u)
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46 if r >= 0.9:
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47 r = int(round(r))
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48 return '%d %s' % (r, r == 1 and unit or unit_plural)
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49 return ''
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50
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51 def format_datetime(t=None, format='%x %X', gmt=False):
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52 if t is None:
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53 t = time.time()
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54 if not isinstance(t, (list, tuple, time.struct_time)):
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55 if gmt:
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56 t = time.gmtime(int(t))
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57 else:
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58 t = time.localtime(int(t))
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59
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60 text = time.strftime(format, t)
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61 encoding = locale.getpreferredencoding()
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62 if sys.platform != 'win32':
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63 encoding = locale.getlocale(locale.LC_TIME)[1] or encoding
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64 # the above is broken on win32, e.g. we'd get '437' instead of 'cp437'
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65 return unicode(text, encoding, 'replace')
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66
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67 def format_date(t=None, format='%x', gmt=False):
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68 return format_datetime(t, format, gmt)
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69
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70 def format_time(t=None, format='%X', gmt=False):
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71 return format_datetime(t, format, gmt)
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72
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73 def get_date_format_hint():
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74 t = time.localtime(0)
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75 t = (1999, 10, 29, t[3], t[4], t[5], t[6], t[7], t[8])
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76 tmpl = format_date(t)
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77 return tmpl.replace('1999', 'YYYY', 1).replace('99', 'YY', 1) \
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78 .replace('10', 'MM', 1).replace('29', 'DD', 1)
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79
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80 def get_datetime_format_hint():
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81 t = time.localtime(0)
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82 t = (1999, 10, 29, 23, 59, 58, t[6], t[7], t[8])
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83 tmpl = format_datetime(t)
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84 return tmpl.replace('1999', 'YYYY', 1).replace('99', 'YY', 1) \
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85 .replace('10', 'MM', 1).replace('29', 'DD', 1) \
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86 .replace('23', 'hh', 1).replace('59', 'mm', 1) \
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87 .replace('58', 'ss', 1)
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88
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89 def http_date(t=None):
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90 """Format t as a rfc822 timestamp"""
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91 if t is None:
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92 t = time.time()
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93 if not isinstance(t, (list, tuple, time.struct_time)):
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94 t = time.gmtime(int(t))
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95 weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
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96 months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
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97 'Oct', 'Nov', 'Dec']
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98 return '%s, %02d %s %04d %02d:%02d:%02d GMT' % (
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99 weekdays[t.tm_wday], t.tm_mday, months[t.tm_mon - 1], t.tm_year,
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100 t.tm_hour, t.tm_min, t.tm_sec)
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101
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102 def parse_date(text):
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103 seconds = None
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104 text = text.strip()
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105 for format in ['%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c',
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106 '%b %d, %Y']:
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107 try:
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108 date = time.strptime(text, format)
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109 seconds = time.mktime(date)
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110 break
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111 except ValueError:
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112 continue
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113 if seconds == None:
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114 raise ValueError, '%s is not a known date format.' % text
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115 return seconds
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