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