85 lines
3.0 KiB
Python
85 lines
3.0 KiB
Python
"""
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IT-specific Form helpers
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"""
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from django.core.validators import EMPTY_VALUES
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from django.forms import ValidationError
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from django.forms.fields import Field, RegexField, Select
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from django.utils.translation import ugettext_lazy as _
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from django.utils.encoding import smart_unicode
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from django.contrib.localflavor.it.util import ssn_check_digit, vat_number_check_digit
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import re
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class ITZipCodeField(RegexField):
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default_error_messages = {
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'invalid': _('Enter a valid zip code.'),
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}
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def __init__(self, *args, **kwargs):
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super(ITZipCodeField, self).__init__(r'^\d{5}$',
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max_length=None, min_length=None, *args, **kwargs)
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class ITRegionSelect(Select):
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"""
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A Select widget that uses a list of IT regions as its choices.
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"""
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def __init__(self, attrs=None):
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from it_region import REGION_CHOICES
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super(ITRegionSelect, self).__init__(attrs, choices=REGION_CHOICES)
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class ITProvinceSelect(Select):
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"""
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A Select widget that uses a list of IT provinces as its choices.
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"""
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def __init__(self, attrs=None):
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from it_province import PROVINCE_CHOICES
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super(ITProvinceSelect, self).__init__(attrs, choices=PROVINCE_CHOICES)
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class ITSocialSecurityNumberField(RegexField):
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"""
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A form field that validates Italian Social Security numbers (codice fiscale).
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For reference see http://www.agenziaentrate.it/ and search for
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'Informazioni sulla codificazione delle persone fisiche'.
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"""
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default_error_messages = {
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'invalid': _(u'Enter a valid Social Security number.'),
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}
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def __init__(self, *args, **kwargs):
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super(ITSocialSecurityNumberField, self).__init__(r'^\w{3}\s*\w{3}\s*\w{5}\s*\w{5}$',
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max_length=None, min_length=None, *args, **kwargs)
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def clean(self, value):
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value = super(ITSocialSecurityNumberField, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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value = re.sub('\s', u'', value).upper()
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try:
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check_digit = ssn_check_digit(value)
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except ValueError:
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raise ValidationError(self.error_messages['invalid'])
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if not value[15] == check_digit:
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raise ValidationError(self.error_messages['invalid'])
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return value
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class ITVatNumberField(Field):
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"""
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A form field that validates Italian VAT numbers (partita IVA).
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"""
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default_error_messages = {
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'invalid': _(u'Enter a valid VAT number.'),
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}
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def clean(self, value):
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value = super(ITVatNumberField, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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try:
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vat_number = int(value)
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except ValueError:
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raise ValidationError(self.error_messages['invalid'])
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vat_number = str(vat_number).zfill(11)
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check_digit = vat_number_check_digit(vat_number[0:10])
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if not vat_number[10] == check_digit:
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raise ValidationError(self.error_messages['invalid'])
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return smart_unicode(vat_number)
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