"""
Norwegian-specific Form helpers
"""
from __future__ import unicode_literals
import datetime
import re
from django.core.validators import EMPTY_VALUES
from django.forms import ValidationError
from django.forms.fields import Field, RegexField, Select
from django.utils.translation import ugettext_lazy as _
from .no_municipalities import MUNICIPALITY_CHOICES
[docs]class NOZipCodeField(RegexField):
"""
A form field that validates input as a Norwegian zip code. Valid codes
have four digits.
"""
default_error_messages = {
'invalid': _('Enter a zip code in the format XXXX.'),
}
def __init__(self, max_length=None, min_length=None, *args, **kwargs):
super(NOZipCodeField, self).__init__(r'^\d{4}$',
max_length, min_length, *args, **kwargs)
[docs]class NOMunicipalitySelect(Select):
"""
A Select widget that uses a list of Norwegian municipalities (fylker)
as its choices.
"""
def __init__(self, attrs=None):
super(NOMunicipalitySelect, self).__init__(attrs, choices=MUNICIPALITY_CHOICES)
[docs]class NOSocialSecurityNumber(Field):
"""
Algorithm is documented at http://no.wikipedia.org/wiki/Personnummer
"""
default_error_messages = {
'invalid': _('Enter a valid Norwegian social security number.'),
}
def clean(self, value):
super(NOSocialSecurityNumber, self).clean(value)
if value in EMPTY_VALUES:
return ''
if not re.match(r'^\d{11}$', value):
raise ValidationError(self.error_messages['invalid'])
day = int(value[:2])
month = int(value[2:4])
year2 = int(value[4:6])
inum = int(value[6:9])
self.birthday = None
try:
if 000 <= inum < 500:
self.birthday = datetime.date(1900 + year2, month, day)
if 500 <= inum < 750 and year2 > 54:
self.birthday = datetime.date(1800 + year2, month, day)
if 500 <= inum < 1000 and year2 < 40:
self.birthday = datetime.date(2000 + year2, month, day)
if 900 <= inum < 1000 and year2 > 39:
self.birthday = datetime.date(1900 + year2, month, day)
except ValueError:
raise ValidationError(self.error_messages['invalid'])
sexnum = int(value[8])
if sexnum % 2 == 0:
self.gender = 'F'
else:
self.gender = 'M'
digits = map(int, list(value))
weight_1 = [3, 7, 6, 1, 8, 9, 4, 5, 2, 1, 0]
weight_2 = [5, 4, 3, 2, 7, 6, 5, 4, 3, 2, 1]
def multiply_reduce(aval, bval):
return sum([(a * b) for (a, b) in zip(aval, bval)])
if multiply_reduce(digits, weight_1) % 11 != 0:
raise ValidationError(self.error_messages['invalid'])
if multiply_reduce(digits, weight_2) % 11 != 0:
raise ValidationError(self.error_messages['invalid'])
return value
[docs]class NOPhoneNumberField(RegexField):
"""
Field with phonenumber validation. Requires a phone number with
8 digits and optional country code
"""
default_error_messages = {
'invalid': _('A phone number must be 8 digits and may have country code'),
}
def __init__(self, max_length=None, min_length=None, *args, **kwargs):
super(NOPhoneNumberField, self).__init__(r'^(?:\+47)? ?(\d{3}\s?\d{2}\s?\d{3}|\d{2}\s?\d{2}\s?\d{2}\s?\d{2})$',
max_length, min_length, *args, **kwargs)