# -*- coding: utf-8 -*-
from django.core.validators import RegexValidator
from django.utils.translation import gettext_lazy as _


DAVNumberValidator = RegexValidator(r'^'
                                    r'([0-9]{3}/[0-9]{2}/)?'
                                    r'[0-9]{1,6}'
                                    r'([*x ][0-9]{1,4})?'
                                    r'([*x ][0-9]{4}[*x ][0-9]{4})?'
                                    r'([*x ][0-9]{8})?'
                                    r'$',
                                    _('Ungültiges Format.'))