# cwmx_ext.py
#
#   Copyright © 2000, 2002 Carey Evans.
#
#   Permission to use, copy, modify, and distribute this software and
#   its documentation for any purpose and without fee is hereby granted,
#   provided that the above copyright notice appear in all copies and
#   that both that copyright notice and this permission notice appear in
#   supporting documentation.

"""cwmx_ext.py

XSLT extension functions for CWML.
"""

import cPickle
from mx import DateTime

from xml.dom import ext
from xml.xpath import Conversions
from xml.xslt import XsltElement
from xml.xslt.AttributeValueTemplate import AttributeValueTemplate


# Format for date and time strings.
datefmt = '%a, %_d %B %Y'
timefmt = datefmt + ' %_I:%M %p'

# URI for CWML build extensions.
CWMX_URI = 'http://home.clear.net.nz/pages/c.evans/xml/cwmx'


def ext_isotime(context, date):
    s = Conversions.StringValue(date)
    if s[0] == 'D':
        s = s[1:]

    dt = DateTime.ISO.ParseDateTime(s)
    if 'T' in s:
        return dt.Format(timefmt)
    else:
        return dt.Format(datefmt)


ExtFunctions = {
    (CWMX_URI, 'isotime'): ext_isotime,
    }