You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
3.1 KiB
83 lines
3.1 KiB
""" |
|
DE-specific Form helpers |
|
""" |
|
|
|
from django.forms import ValidationError |
|
from django.forms.fields import Field, RegexField, Select, EMPTY_VALUES |
|
from django.utils.translation import ugettext_lazy as _ |
|
import re |
|
|
|
id_re = re.compile(r"^(?P<residence>\d{10})(?P<origin>\w{1,3})[-\ ]?(?P<birthday>\d{7})[-\ ]?(?P<validity>\d{7})[-\ ]?(?P<checksum>\d{1})$") |
|
|
|
class DEZipCodeField(RegexField): |
|
default_error_messages = { |
|
'invalid': _('Enter a zip code in the format XXXXX.'), |
|
} |
|
def __init__(self, *args, **kwargs): |
|
super(DEZipCodeField, self).__init__(r'^\d{5}$', |
|
max_length=None, min_length=None, *args, **kwargs) |
|
|
|
class DEStateSelect(Select): |
|
""" |
|
A Select widget that uses a list of DE states as its choices. |
|
""" |
|
def __init__(self, attrs=None): |
|
from de_states import STATE_CHOICES |
|
super(DEStateSelect, self).__init__(attrs, choices=STATE_CHOICES) |
|
|
|
class DEIdentityCardNumberField(Field): |
|
""" |
|
A German identity card number. |
|
|
|
Checks the following rules to determine whether the number is valid: |
|
|
|
* Conforms to the XXXXXXXXXXX-XXXXXXX-XXXXXXX-X format. |
|
* No group consists entirely of zeroes. |
|
* Included checksums match calculated checksums |
|
|
|
Algorithm is documented at http://de.wikipedia.org/wiki/Personalausweis |
|
""" |
|
default_error_messages = { |
|
'invalid': _('Enter a valid German identity card number in XXXXXXXXXXX-XXXXXXX-XXXXXXX-X format.'), |
|
} |
|
|
|
def has_valid_checksum(self, number): |
|
given_number, given_checksum = number[:-1], number[-1] |
|
calculated_checksum = 0 |
|
fragment = "" |
|
parameter = 7 |
|
|
|
for i in range(len(given_number)): |
|
fragment = str(int(given_number[i]) * parameter) |
|
if fragment.isalnum(): |
|
calculated_checksum += int(fragment[-1]) |
|
if parameter == 1: |
|
parameter = 7 |
|
elif parameter == 3: |
|
parameter = 1 |
|
elif parameter ==7: |
|
parameter = 3 |
|
|
|
return str(calculated_checksum)[-1] == given_checksum |
|
|
|
def clean(self, value): |
|
super(DEIdentityCardNumberField, self).clean(value) |
|
if value in EMPTY_VALUES: |
|
return u'' |
|
match = re.match(id_re, value) |
|
if not match: |
|
raise ValidationError(self.error_messages['invalid']) |
|
|
|
gd = match.groupdict() |
|
residence, origin = gd['residence'], gd['origin'] |
|
birthday, validity, checksum = gd['birthday'], gd['validity'], gd['checksum'] |
|
|
|
if residence == '0000000000' or birthday == '0000000' or validity == '0000000': |
|
raise ValidationError(self.error_messages['invalid']) |
|
|
|
all_digits = u"%s%s%s%s" % (residence, birthday, validity, checksum) |
|
if not self.has_valid_checksum(residence) or not self.has_valid_checksum(birthday) or \ |
|
not self.has_valid_checksum(validity) or not self.has_valid_checksum(all_digits): |
|
raise ValidationError(self.error_messages['invalid']) |
|
|
|
return u'%s%s-%s-%s-%s' % (residence, origin, birthday, validity, checksum)
|
|
|