Changeset View

Standalone View

				"""Custom validators for subscription-related forms."""
				from django.core.exceptions import ValidationError
				from django.utils.translation import gettext_lazy as _

				from stdnum.eu import vat
				import stdnum.exceptions


				class VATINValidator:
				"""A validator for VAT identification numbers.

				Currently only supports European VIES VAT identification numbers.
				See See https://en.wikipedia.org/wiki/VAT_identification_number
				"""

				messages = {
				'country_code': _(
				'VAT identification number must start with a valid 2-letter country code.'
				),
				'vatin': _('%(vatin)s is not a valid VAT identification number.'),
				}

				def __call__(self, value):
				"""Validate the given value as VATIN."""
				try:
				vat_number = vat.validate(value)
				except stdnum.exceptions.ValidationError:
				raise ValidationError(
				self.messages['vatin'], code='vat_number', params={'vatin': value}
				)
				country_code = vat.guess_country(vat_number)
				if not country_code:
				raise ValidationError(
				self.messages['country_code'],
				code='vat_number',
				)

				def clean(self, value):
				"""Return tuple of country code and number."""
				return vat.validate(value)