87 lines
2.7 KiB
Python
87 lines
2.7 KiB
Python
"""
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Iceland specific form helpers.
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"""
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from __future__ import absolute_import
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from django.contrib.localflavor.is_.is_postalcodes import IS_POSTALCODES
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from django.core.validators import EMPTY_VALUES
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from django.forms import ValidationError
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from django.forms.fields import RegexField
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from django.forms.widgets import Select
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from django.utils.encoding import smart_unicode
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from django.utils.translation import ugettext_lazy as _
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class ISIdNumberField(RegexField):
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"""
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Icelandic identification number (kennitala). This is a number every citizen
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of Iceland has.
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"""
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default_error_messages = {
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'invalid': _('Enter a valid Icelandic identification number. The format is XXXXXX-XXXX.'),
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'checksum': _(u'The Icelandic identification number is not valid.'),
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}
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def __init__(self, max_length=11, min_length=10, *args, **kwargs):
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super(ISIdNumberField, self).__init__(r'^\d{6}(-| )?\d{4}$',
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max_length, min_length, *args, **kwargs)
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def clean(self, value):
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value = super(ISIdNumberField, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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value = self._canonify(value)
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if self._validate(value):
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return self._format(value)
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else:
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raise ValidationError(self.error_messages['checksum'])
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def _canonify(self, value):
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"""
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Returns the value as only digits.
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"""
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return value.replace('-', '').replace(' ', '')
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def _validate(self, value):
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"""
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Takes in the value in canonical form and checks the verifier digit. The
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method is modulo 11.
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"""
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check = [3, 2, 7, 6, 5, 4, 3, 2, 1, 0]
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return sum([int(value[i]) * check[i] for i in range(10)]) % 11 == 0
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def _format(self, value):
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"""
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Takes in the value in canonical form and returns it in the common
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display format.
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"""
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return smart_unicode(value[:6]+'-'+value[6:])
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class ISPhoneNumberField(RegexField):
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"""
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Icelandic phone number. Seven digits with an optional hyphen or space after
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the first three digits.
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"""
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def __init__(self, max_length=8, min_length=7, *args, **kwargs):
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super(ISPhoneNumberField, self).__init__(r'^\d{3}(-| )?\d{4}$',
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max_length, min_length, *args, **kwargs)
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def clean(self, value):
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value = super(ISPhoneNumberField, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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return value.replace('-', '').replace(' ', '')
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class ISPostalCodeSelect(Select):
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"""
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A Select widget that uses a list of Icelandic postal codes as its choices.
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"""
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def __init__(self, attrs=None):
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super(ISPostalCodeSelect, self).__init__(attrs, choices=IS_POSTALCODES)
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