# -*- coding: utf-8 -*-
"""
AR-specific Form helpers.
"""
from __future__ import absolute_import, unicode_literals
from django.core.validators import EMPTY_VALUES
from django.forms import ValidationError
from django.forms.fields import RegexField, CharField, Select
from django.utils.translation import ugettext_lazy as _
from .ar_provinces import PROVINCE_CHOICES
[docs]class ARProvinceSelect(Select):
"""
A Select widget that uses a list of Argentinean provinces/autonomous cities
as its choices.
"""
def __init__(self, attrs=None):
super(ARProvinceSelect, self).__init__(attrs, choices=PROVINCE_CHOICES)
[docs]class ARPostalCodeField(RegexField):
"""
A field that accepts a 'classic' NNNN Postal Code or a CPA.
See:
http://www.correoargentino.com.ar/cpa/que_es
http://www.correoargentino.com.ar/cpa/como_escribirlo
"""
default_error_messages = {
'invalid': _("Enter a postal code in the format NNNN or ANNNNAAA."),
}
def __init__(self, max_length=8, min_length=4, *args, **kwargs):
super(ARPostalCodeField, self).__init__(r'^\d{4}$|^[A-HJ-NP-Za-hj-np-z]\d{4}\D{3}$',
max_length, min_length,
*args, **kwargs)
def clean(self, value):
value = super(ARPostalCodeField, self).clean(value)
if value in EMPTY_VALUES:
return ''
if len(value) not in (4, 8):
raise ValidationError(self.error_messages['invalid'])
if len(value) == 8:
return '%s%s%s' % (value[0].upper(), value[1:5], value[5:].upper())
return value
[docs]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, max_length=10, min_length=7, *args, **kwargs):
super(ARDNIField, self).__init__(max_length, min_length,
*args, **kwargs)
[docs] 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 ''
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
[docs]class ARCUITField(RegexField):
"""
This field validates a CUIT (Código Único de Identificación Tributaria). A
CUIT is of the form XX-XXXXXXXX-V. The last digit is a check digit.
More info:
http://es.wikipedia.org/wiki/Clave_%C3%9Anica_de_Identificaci%C3%B3n_Tributaria
English info:
http://www.justlanded.com/english/Argentina/Argentina-Guide/Visas-Permits/Other-Legal-Documents
"""
default_error_messages = {
'invalid': _('Enter a valid CUIT in XX-XXXXXXXX-X or XXXXXXXXXXXX format.'),
'checksum': _("Invalid CUIT."),
'legal_type': _('Invalid legal type. Type must be 27, 20, 30, 23, 24 or 33.'),
}
def __init__(self, max_length=None, min_length=None, *args, **kwargs):
super(ARCUITField, self).__init__(r'^\d{2}-?\d{8}-?\d$',
max_length, min_length, *args, **kwargs)
[docs] 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 ''
value, cd = self._canon(value)
if not value[:2] in ['27', '20', '30', '23', '24', '33']:
raise ValidationError(self.error_messages['legal_type'])
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):
# Calculation code based on:
# http://es.wikipedia.org/wiki/C%C3%B3digo_%C3%9Anico_de_Identificaci%C3%B3n_Tributaria
mults = (5, 4, 3, 2, 7, 6, 5, 4, 3, 2)
tmp = sum([m * int(cuit[idx]) for idx, m in enumerate(mults)])
result = 11 - (tmp % 11)
if result == 11:
result = 0
elif result == 10:
result = 9
return str(result)
def _format(self, cuit, check_digit=None):
if check_digit is None:
check_digit = cuit[-1]
cuit = cuit[:-1]
return '%s-%s-%s' % (cuit[:2], cuit[2:], check_digit)