# -*- coding: utf-8 -*-
"""
AR-specific Form helpers.
"""
from django.forms import ValidationError
from django.core.validators import EMPTY_VALUES
from django.forms.fields import RegexField,CharField,Select
from django.utils.encoding import smart_unicode
from django.utils.translation import ugettext_lazy
class ARProvinceSelect(Select):
"""
A Select widget that uses a list of Argentinean provinces/autonomous cities
as its choices.
"""
def __init__(self, attrs=None):
from ar_provinces import PROVINCE_CHOICES
super(ARProvinceSelect, self).__init__(attrs, choices=PROVINCE_CHOICES)
class ARPostalCodeField(RegexField):
"""
A field that accepts a 'classic' NNNN Postal Code or a CPA.
See http://www.correoargentino.com.ar/consulta_cpa/home.php
"""
default_error_messages = {
'invalid': _("Enter a postal code in the format NNNN or ANNNNAAA."),
}
def __init__(self, *args, **kwargs):
super(ARPostalCodeField, self).__init__(r'^\d{4}$|^[A-HJ-NP-Za-hj-np-z]\d{4}\D{3}$',
min_length=4, max_length=8, *args, **kwargs)
def clean(self, value):
value = super(ARPostalCodeField, self).clean(value)
if value in EMPTY_VALUES:
return u''
if len(value) not in (4, 8):
raise ValidationError(self.error_messages['invalid'])
if len(value) == 8:
return u'%s%s%s' % (value[0].upper(), value[1:5], value[5:].upper())
return value
class ARDNIField(CharField):
"""
A field that validates 'Documento Nacional de Identidad' (DNI) numbers.
"""
default_error_messages = {
'invalid': _("This field requires only numbers."),
'max_digits': _("This field requires 7 or 8 digits."),
}
def __init__(self, *args, **kwargs):
super(ARDNIField, self).__init__(max_length=10, min_length=7, *args,
**kwargs)
def clean(self, value):
"""
Value can be a string either in the [X]X.XXX.XXX or [X]XXXXXXX formats.
"""
value = super(ARDNIField, self).clean(value)
if value in EMPTY_VALUES:
return u''
if not value.isdigit():
value = value.replace('.', '')
if not value.isdigit():
raise ValidationError(self.error_messages['invalid'])
if len(value) not in (7, 8):
raise ValidationError(self.error_messages['max_digits'])
return value
class ARCUITField(RegexField):
"""
This field validates a CUIT (Cdigo nico de Identificacin Tributaria). A
CUIT is of the form XX-XXXXXXXX-V. The last digit is a check digit.
"""
default_error_messages = {
'invalid': _('Enter a valid CUIT in XX-XXXXXXXX-X or XXXXXXXXXXXX format.'),
'checksum': _("Invalid CUIT."),
}
def __init__(self, *args, **kwargs):
super(ARCUITField, self).__init__(r'^\d{2}-?\d{8}-?\d$',
*args, **kwargs)
def clean(self, value):
"""
Value can be either a string in the format XX-XXXXXXXX-X or an
11-digit number.
"""
value = super(ARCUITField, self).clean(value)
if value in EMPTY_VALUES:
return u''
value, cd = self._canon(value)
if self._calc_cd(value) != cd:
raise ValidationError(self.error_messages['checksum'])
return self._format(value, cd)
def _canon(self, cuit):
cuit = cuit.replace('-', '')
return cuit[:-1], cuit[-1]
def _calc_cd(self, cuit):
mults = (5, 4, 3, 2, 7, 6, 5, 4, 3, 2)
tmp = sum([m * int(cuit[idx]) for idx, m in enumerate(mults)])
return str(11 - tmp % 11)
def _format(self, cuit, check_digit=None):
if check_digit == None:
check_digit = cuit[-1]
cuit = cuit[:-1]
return u'%s-%s-%s' % (cuit[:2], cuit[2:], check_digit)
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