Source code for localflavor.kw.forms
"""Kuwait-specific Form helpers."""
import re
import textwrap
from datetime import date
from django.forms import ValidationError
from django.forms.fields import RegexField, Select
from django.utils.translation import gettext_lazy as _
from .kw_areas import AREA_CHOICES
from .kw_governorates import GOVERNORATE_CHOICES
id_re = re.compile(r'''^(?P<initial>\d)
(?P<yy>\d\d)
(?P<mm>\d\d)
(?P<dd>\d\d)
(?P<mid>\d{4})
(?P<checksum>\d)''', re.VERBOSE)
def is_valid_kw_civilid_checksum(value):
weight = (2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2)
calculated_checksum = 0
for i in range(11):
calculated_checksum += int(value[i]) * weight[i]
remainder = calculated_checksum % 11
checkdigit = 11 - remainder
if checkdigit != int(value[11]):
return False
return True
[docs]class KWCivilIDNumberField(RegexField):
"""
Kuwaiti Civil ID numbers are 12 digits, second to seventh digits represents the person's birthdate.
Checks the following rules to determine the validity of the number:
* The number consist of 12 digits.
* The birthdate of the person is a valid date.
* The calculated checksum equals to the last digit of the Civil ID.
"""
default_error_messages = {
'invalid': _('Enter a valid Kuwaiti Civil ID number'),
}
def __init__(self, max_length=12, min_length=12, **kwargs):
super().__init__(
r'\d{12}', max_length=max_length, min_length=min_length,
**kwargs
)
[docs] def clean(self, value):
value = super().clean(value)
if value in self.empty_values:
return value
cc = value[0] # Century value
yy, mm, dd = textwrap.wrap(value[1:7], 2) # pylint: disable=unbalanced-tuple-unpacking
# Fix the dates so that those born
# in 2000+ pass the validation check
if int(cc) == 3:
yy = '20{}'.format(yy)
elif int(cc) == 2:
yy = '19{}'.format(yy)
try:
date(int(yy), int(mm), int(dd))
except ValueError:
raise ValidationError(self.error_messages['invalid'], code='invalid')
if not is_valid_kw_civilid_checksum(value):
raise ValidationError(self.error_messages['invalid'], code='invalid')
return value
[docs]class KWGovernorateSelect(Select):
"""
A Select widget that uses a list of Kuwait governorates
as its choices.
"""
def __init__(self, attrs=None):
super().__init__(attrs, choices=GOVERNORATE_CHOICES)
[docs]class KWAreaSelect(Select):
"""
A Select widget that uses a list of Kuwait areas
as its choices.
.. versionadded:: 1.6
"""
def __init__(self, attrs=None):
super().__init__(attrs, choices=AREA_CHOICES)