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dateutils.py
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dateutils.py
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# -*- coding: utf-8 -*-
## $Id$
##
## Some functions about dates
##
## This file is part of the CERN Document Server Software (CDSware).
## Copyright (C) 2002, 2003, 2004, 2005, 2006 CERN.
##
## The CDSware 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.
##
## The CDSware 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 CDSware; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
API for date conversion and date related GUI creation.
Lexicon
datetext:
textual format => 'YEAR-MONTH-DAY HOUR:MINUTE:SECOND'
e.g. '2005-11-16 15:11:44'
default value: '0000-00-00 00:00:00'
datestruct:
tuple format => see http://docs.python.org/lib/module-time.html
(YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, WEEKDAY, YEARDAY, DAYLIGHT)
e.g. (2005, 11, 16, 15, 11, 44, 2, 320, 0)
default value: (0, 0, 0, 0, 0, 0, 0, 0, 0)
dategui:
textual format for output => 'DAY MONTH YEAR, HOUR:MINUTE'
e.g. '16 nov 2005, 15:11'
default value: _("N/A")
"""
# External imports
from time import strptime, strftime, localtime
# CDSware imports
from cdsware.config import cdslang
from cdsware.messages import gettext_set_language
datetext_default = '0000-00-00 00:00:00'
datestruct_default = (0, 0, 0, 0, 0, 0, 0, 0, 0)
datetext_format = "%Y-%m-%d %H:%M:%S"
def convert_datetext_to_dategui(datetext, ln=cdslang):
"""
Convert:
'2005-11-16 15:11:57' => '16 nov 2005, 15:11'
Month is internationalized
"""
try:
datestruct = convert_datetext_to_datestruct(datetext)
if datestruct == datestruct_default:
raise ValueError
month = get_i18n_month_name(datestruct[1], ln=ln)
output_format = "%d " + month + " %Y, %H:%M"
return strftime(output_format, datestruct)
except:
_ = gettext_set_language(ln)
return _("N/A")
def convert_datetext_to_datestruct(datetext):
"""
Convert:
'2005-11-16 15:11:57' => (2005, 11, 16, 15, 11, 44, 2, 320, 0)
"""
try:
return strptime(datetext, datetext_format)
except:
return datestruct_default
def convert_datestruct_to_dategui(datestruct, ln=cdslang):
"""
Convert:
(2005, 11, 16, 15, 11, 44, 2, 320, 0) => '16 nov 2005, 15:11'
Month is internationalized
"""
try:
if datestruct[0] and datestruct[1] and datestruct[2]:
month = get_i18n_month_name(datestruct[1], ln=ln)
output_format = "%d " + month + " %Y, %H:%M"
return strftime(output_format, datestruct)
else:
raise ValueError
except:
_ = gettext_set_language(ln)
return _("N/A")
def convert_datestruct_to_datetext(datestruct):
"""
Convert:
(2005, 11, 16, 15, 11, 44, 2, 320, 0) => '2005-11-16 15:11:57'
"""
try:
return strftime(datetext_format, datestruct)
except:
return datetext_default
def get_datetext(year, month, day):
"""
year=2005, month=11, day=16 => '2005-11-16 00:00:00'
"""
input_format = "%Y-%m-%d"
try:
datestruct = strptime("%i-%i-%i"% (year, month, day), input_format)
return strftime(datetext_format, datestruct)
except:
return datetext_default
def get_datestruct(year, month, day):
"""
year=2005, month=11, day=16 => (2005, 11, 16, 0, 0, 0, 2, 320, -1)
"""
input_format = "%Y-%m-%d"
try:
return strptime("%i-%i-%i"% (year, month, day), input_format)
except ValueError or TypeError:
return datestruct_default
def get_i18n_day_name(day_nb, display='short', ln=cdslang):
"""
get the string representation of a weekday, internationalized
@param day_nb: number of weekday UNIX like.
=> 0=Sunday
@param ln: language for output
@return the string representation of the day
"""
_ = gettext_set_language(ln)
if display == 'short':
days = {0: _("Sun"),
1: _("Mon"),
2: _("Tue"),
3: _("Wed"),
4: _("Thu"),
5: _("Fri"),
6: _("Sat")}
else:
days = {0: _("Sunday"),
1: _("Monday"),
2: _("Tuesday"),
3: _("Wednesday"),
4: _("Thursday"),
5: _("Friday"),
6: _("Saturday")}
return days[day_nb]
def get_i18n_month_name(month_nb, display='short', ln=cdslang):
"""
get a non-numeric representation of a month, internationalized.
@param month_nb: number of month, (1 based!)
=>1=jan,..,12=dec
@param ln: language for output
@return the string representation of month
"""
_ = gettext_set_language(ln)
if display == 'short':
monthes = {0: _("Month"),
1: _("Jan"),
2: _("Feb"),
3: _("Mar"),
4: _("Apr"),
5: _("May"),
6: _("Jun"),
7: _("Jul"),
8: _("Aug"),
9: _("Sep"),
10: _("Oct"),
11: _("Nov"),
12: _("Dec")}
else:
monthes = {0: _("Month"),
1: _("January"),
2: _("February"),
3: _("March"),
4: _("April"),
5: _("May"),
6: _("June"),
7: _("July"),
8: _("August"),
9: _("September"),
10: _("October"),
11: _("November"),
12: _("December")}
return monthes[month_nb]
def create_day_selectbox(name, selected_day=0, ln=cdslang):
"""
Creates an HTML menu for day selection. (0..31 values).
@param name: name of the control (i.e. name of the var you'll get)
@param selected_day: preselect a day. Use 0 for the label 'Day'
@param ln: language of the menu
@return html a string
"""
_ = gettext_set_language(ln)
out = "<select name=\"%s\">\n"% name
for i in range(0, 32):
out += " <option value=\"%i\""% i
if (i == selected_day):
out += " selected=\"selected\""
if (i == 0):
out += ">%s</option>\n"% _("Day")
else:
out += ">%i</option>\n"% i
out += "</select>\n"
return out
def create_month_selectbox(name, selected_month=0, ln=cdslang):
"""
Creates an HTML menu for month selection. Value of selected field is numeric
@param name: name of the control (your form will be sent with name=value...)
@param selected_month: preselect a month. use 0 for the Label 'Month'
@param ln: language of the menu
@return html as string
"""
out = "<select name=\"%s\">\n"% name
for i in range(0, 13):
out += "<option value=\"%i\""% i
if (i == selected_month):
out += " selected=\"selected\""
out += ">%s</option>\n"% get_i18n_month_name(i, ln)
out += "</select>\n"
return out
def create_year_inputbox(name, value=0):
"""
Creates an HTML field (simple input) for year selection.
@param name: name of the control (i.e. name of the variable you'll get)
@param value: prefilled value (int)
@return html as string
"""
out = "<input type=\"text\" name=\"%s\" value=\"%i\" maxlength=\"4\" size=\"4\"/>\n"% (name, value)
return out
def create_year_selectbox(name, from_year=-1, length=10, selected_year=0, ln=cdslang):
"""
Creates an HTML menu (dropdownbox) for year selection.
@param name: name of control( i.e. name of the variable you'll get)
@param from_year: year on which to begin. if <0 assume it is current year
@param length: number of items in menu
@param selected_year: initial selected year (if in range), else: label is selected
@param ln: language
@return html as string
"""
_ = gettext_set_language(ln)
if from_year < 0:
from_year = localtime()[0]
out = "<select name=\"%s\">\n"% name
out += ' <option value="0"'
if selected_year == 0:
out += ' selected="selected"'
out += ">%s</option>\n"% _("Year")
for i in range(from_year, from_year + length):
out += "<option value=\"%i\""% i
if (i == selected_year):
out += " selected=\"selected\""
out += ">%i</option>\n"% i
out += "</select>\n"
return out

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