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""" |
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Iceland specific form helpers. |
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""" |
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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.translation import ugettext_lazy as _ |
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from django.utils.encoding import smart_unicode |
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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, *args, **kwargs): |
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kwargs['min_length'],kwargs['max_length'] = 10,11 |
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super(ISIdNumberField, self).__init__(r'^\d{6}(-| )?\d{4}$', *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, *args, **kwargs): |
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kwargs['min_length'], kwargs['max_length'] = 7,8 |
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super(ISPhoneNumberField, self).__init__(r'^\d{3}(-| )?\d{4}$', *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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from is_postalcodes import IS_POSTALCODES |
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super(ISPostalCodeSelect, self).__init__(attrs, choices=IS_POSTALCODES) |
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