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# -*- coding: utf-8 -*-
"""
UY-specific form helpers.
"""
import re
from django.forms.fields import Select, RegexField, EMPTY_VALUES
from django.forms import ValidationError
from django.utils.translation import ugettext_lazy as _
from django.contrib.localflavor.uy.util import get_validation_digit
class UYDepartamentSelect(Select):
"""
A Select widget that uses a list of Uruguayan departaments as its choices.
"""
def __init__(self, attrs=None):
from uy_departaments import DEPARTAMENT_CHOICES
super(UYDepartamentSelect, self).__init__(attrs, choices=DEPARTAMENT_CHOICES)
class UYCIField(RegexField):
"""
A field that validates Uruguayan 'Cedula de identidad' (CI) numbers.
"""
default_error_messages = {
'invalid': _("Enter a valid CI number in X.XXX.XXX-X,"
"XXXXXXX-X or XXXXXXXX format."),
'invalid_validation_digit': _("Enter a valid CI number."),
}
def __init__(self, *args, **kwargs):
super(UYCIField, self).__init__(r'(?P<num>(\d{6,7}|(\d\.)?\d{3}\.\d{3}))-?(?P<val>\d)',
*args, **kwargs)
def clean(self, value):
"""
Validates format and validation digit.
The official format is [X.]XXX.XXX-X but usually dots and/or slash are
omitted so, when validating, those characters are ignored if found in
the correct place. The three typically used formats are supported:
[X]XXXXXXX, [X]XXXXXX-X and [X.]XXX.XXX-X.
"""
value = super(UYCIField, self).clean(value)
if value in EMPTY_VALUES:
return u''
match = self.regex.match(value)
if not match:
raise ValidationError(self.error_messages['invalid'])
number = int(match.group('num').replace('.', ''))
validation_digit = int(match.group('val'))
if not validation_digit == get_validation_digit(number):
raise ValidationError(self.error_messages['invalid_validation_digit'])
return value
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