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114 lines
3.8 KiB
114 lines
3.8 KiB
# -*- 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.forms import ValidationError |
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from django.forms.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_lazy as _ |
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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': _("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': _("This field requires only numbers."), |
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'max_digits': _("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': _('Enter a valid CUIT in XX-XXXXXXXX-X or XXXXXXXXXXXX format.'), |
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'checksum': _("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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