app/django/contrib/localflavor/fi/forms.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Tue, 14 Oct 2008 16:00:59 +0000
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"""
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FI-specific Form helpers
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"""
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import re
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from django.forms import ValidationError
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from django.forms.fields import Field, RegexField, Select, EMPTY_VALUES
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from django.utils.translation import ugettext_lazy as _
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class FIZipCodeField(RegexField):
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    default_error_messages = {
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        'invalid': _('Enter a zip code in the format XXXXX.'),
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    }
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    def __init__(self, *args, **kwargs):
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        super(FIZipCodeField, self).__init__(r'^\d{5}$',
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            max_length=None, min_length=None, *args, **kwargs)
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class FIMunicipalitySelect(Select):
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    """
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    A Select widget that uses a list of Finnish municipalities as its choices.
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    """
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    def __init__(self, attrs=None):
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        from fi_municipalities import MUNICIPALITY_CHOICES
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        super(FIMunicipalitySelect, self).__init__(attrs, choices=MUNICIPALITY_CHOICES)
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class FISocialSecurityNumber(Field):
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    default_error_messages = {
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        'invalid': _('Enter a valid Finnish social security number.'),
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    }
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    def clean(self, value):
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        super(FISocialSecurityNumber, self).clean(value)
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        if value in EMPTY_VALUES:
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            return u''
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        checkmarks = "0123456789ABCDEFHJKLMNPRSTUVWXY"
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        result = re.match(r"""^
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            (?P<date>([0-2]\d|3[01])
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            (0\d|1[012])
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            (\d{2}))
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            [A+-]
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            (?P<serial>(\d{3}))
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            (?P<checksum>[%s])$""" % checkmarks, value, re.VERBOSE | re.IGNORECASE)
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        if not result:
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            raise ValidationError(self.error_messages['invalid'])
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        gd = result.groupdict()
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        checksum = int(gd['date'] + gd['serial'])
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        if checkmarks[checksum % len(checkmarks)] == gd['checksum'].upper():
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            return u'%s' % value.upper()
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        raise ValidationError(self.error_messages['invalid'])