app/django/contrib/localflavor/nl/forms.py
author Lennard de Rijk <ljvderijk@gmail.com>
Fri, 14 Aug 2009 10:28:06 -0700
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permissions -rw-r--r--
Set new Melange version number to 0-5-20090814p1 in app.yaml.template.
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"""
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NL-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, Select, EMPTY_VALUES
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from django.utils.translation import ugettext_lazy as _
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from django.utils.encoding import smart_unicode
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pc_re = re.compile('^\d{4}[A-Z]{2}$')
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sofi_re = re.compile('^\d{9}$')
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numeric_re = re.compile('^\d+$')
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class NLZipCodeField(Field):
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    """
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    A Dutch postal code field.
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    """
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    default_error_messages = {
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        'invalid': _('Enter a valid postal code'),
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    }
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    def clean(self, value):
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        super(NLZipCodeField, self).clean(value)
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        if value in EMPTY_VALUES:
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            return u''
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        value = value.strip().upper().replace(' ', '')
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        if not pc_re.search(value):
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            raise ValidationError(self.error_messages['invalid'])
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        if int(value[:4]) < 1000:
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            raise ValidationError(self.error_messages['invalid'])
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        return u'%s %s' % (value[:4], value[4:])
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class NLProvinceSelect(Select):
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    """
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    A Select widget that uses a list of provinces of the Netherlands as its
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    choices.
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    """
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    def __init__(self, attrs=None):
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        from nl_provinces import PROVINCE_CHOICES
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        super(NLProvinceSelect, self).__init__(attrs, choices=PROVINCE_CHOICES)
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class NLPhoneNumberField(Field):
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    """
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    A Dutch telephone number field.
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    """
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    default_error_messages = {
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        'invalid': _('Enter a valid phone number'),
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    }
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    def clean(self, value):
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        super(NLPhoneNumberField, self).clean(value)
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        if value in EMPTY_VALUES:
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            return u''
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        phone_nr = re.sub('[\-\s\(\)]', '', smart_unicode(value))
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        if len(phone_nr) == 10 and numeric_re.search(phone_nr):
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            return value
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        if phone_nr[:3] == '+31' and len(phone_nr) == 12 and \
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           numeric_re.search(phone_nr[3:]):
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            return value
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        raise ValidationError(self.error_messages['invalid'])
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class NLSoFiNumberField(Field):
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    """
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    A Dutch social security number (SoFi/BSN) field.
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    http://nl.wikipedia.org/wiki/Sofinummer
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    """
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    default_error_messages = {
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        'invalid': _('Enter a valid SoFi number'),
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    }
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    def clean(self, value):
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        super(NLSoFiNumberField, self).clean(value)
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        if value in EMPTY_VALUES:
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            return u''
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        if not sofi_re.search(value):
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            raise ValidationError(self.error_messages['invalid'])
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        if int(value) == 0:
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            raise ValidationError(self.error_messages['invalid'])
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        checksum = 0
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        for i in range(9, 1, -1):
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            checksum += int(value[9-i]) * i
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        checksum -= int(value[-1])
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        if checksum % 11 != 0:
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            raise ValidationError(self.error_messages['invalid'])
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        return value