82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
"""
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Norwegian-specific Form helpers
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"""
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import re, datetime
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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 NOZipCodeField(RegexField):
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default_error_messages = {
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'invalid': _('Enter a zip code in the format XXXX.'),
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}
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def __init__(self, *args, **kwargs):
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super(NOZipCodeField, self).__init__(r'^\d{4}$',
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max_length=None, min_length=None, *args, **kwargs)
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class NOMunicipalitySelect(Select):
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"""
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A Select widget that uses a list of Norwegian municipalities (fylker)
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as its choices.
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"""
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def __init__(self, attrs=None):
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from no_municipalities import MUNICIPALITY_CHOICES
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super(NOMunicipalitySelect, self).__init__(attrs, choices=MUNICIPALITY_CHOICES)
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class NOSocialSecurityNumber(Field):
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"""
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Algorithm is documented at http://no.wikipedia.org/wiki/Personnummer
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"""
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default_error_messages = {
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'invalid': _(u'Enter a valid Norwegian social security number.'),
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}
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def clean(self, value):
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super(NOSocialSecurityNumber, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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if not re.match(r'^\d{11}$', value):
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raise ValidationError(self.error_messages['invalid'])
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day = int(value[:2])
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month = int(value[2:4])
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year2 = int(value[4:6])
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inum = int(value[6:9])
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self.birthday = None
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try:
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if 000 <= inum < 500:
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self.birthday = datetime.date(1900+year2, month, day)
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if 500 <= inum < 750 and year2 > 54:
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self.birthday = datetime.date(1800+year2, month, day)
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if 500 <= inum < 1000 and year2 < 40:
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self.birthday = datetime.date(2000+year2, month, day)
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if 900 <= inum < 1000 and year2 > 39:
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self.birthday = datetime.date(1900+year2, month, day)
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except ValueError:
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raise ValidationError(self.error_messages['invalid'])
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sexnum = int(value[8])
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if sexnum % 2 == 0:
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self.gender = 'F'
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else:
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self.gender = 'M'
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digits = map(int, list(value))
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weight_1 = [3, 7, 6, 1, 8, 9, 4, 5, 2, 1, 0]
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weight_2 = [5, 4, 3, 2, 7, 6, 5, 4, 3, 2, 1]
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def multiply_reduce(aval, bval):
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return sum([(a * b) for (a, b) in zip(aval, bval)])
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if multiply_reduce(digits, weight_1) % 11 != 0:
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raise ValidationError(self.error_messages['invalid'])
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if multiply_reduce(digits, weight_2) % 11 != 0:
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raise ValidationError(self.error_messages['invalid'])
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return value
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