119 lines
3.8 KiB
Python
119 lines
3.8 KiB
Python
"""
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Swiss-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 Field, RegexField, 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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import re
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id_re = re.compile(r"^(?P<idnumber>\w{8})(?P<pos9>(\d{1}|<))(?P<checksum>\d{1})$")
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phone_digits_re = re.compile(r'^0([1-9]{1})\d{8}$')
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class CHZipCodeField(RegexField):
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default_error_messages = {
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'invalid': _('Enter a zip code in the format XXXX.'),
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}
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def __init__(self, *args, **kwargs):
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super(CHZipCodeField, self).__init__(r'^\d{4}$',
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max_length=None, min_length=None, *args, **kwargs)
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class CHPhoneNumberField(Field):
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"""
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Validate local Swiss phone number (not international ones)
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The correct format is '0XX XXX XX XX'.
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'0XX.XXX.XX.XX' and '0XXXXXXXXX' validate but are corrected to
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'0XX XXX XX XX'.
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"""
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default_error_messages = {
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'invalid': 'Phone numbers must be in 0XX XXX XX XX format.',
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}
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def clean(self, value):
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super(CHPhoneNumberField, 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|/|-)', '', smart_unicode(value))
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m = phone_digits_re.search(value)
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if m:
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return u'%s %s %s %s' % (value[0:3], value[3:6], value[6:8], value[8:10])
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raise ValidationError(self.error_messages['invalid'])
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class CHStateSelect(Select):
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"""
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A Select widget that uses a list of CH states as its choices.
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"""
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def __init__(self, attrs=None):
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from ch_states import STATE_CHOICES # relative import
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super(CHStateSelect, self).__init__(attrs, choices=STATE_CHOICES)
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class CHIdentityCardNumberField(Field):
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"""
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A Swiss identity card number.
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Checks the following rules to determine whether the number is valid:
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* Conforms to the X1234567<0 or 1234567890 format.
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* Included checksums match calculated checksums
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Algorithm is documented at http://adi.kousz.ch/artikel/IDCHE.htm
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"""
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default_error_messages = {
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'invalid': _('Enter a valid Swiss identity or passport card number in X1234567<0 or 1234567890 format.'),
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}
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def has_valid_checksum(self, number):
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given_number, given_checksum = number[:-1], number[-1]
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new_number = given_number
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calculated_checksum = 0
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fragment = ""
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parameter = 7
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first = str(number[:1])
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if first.isalpha():
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num = ord(first.upper()) - 65
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if num < 0 or num > 8:
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return False
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new_number = str(num) + new_number[1:]
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new_number = new_number[:8] + '0'
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if not new_number.isdigit():
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return False
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for i in range(len(new_number)):
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fragment = int(new_number[i])*parameter
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calculated_checksum += fragment
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if parameter == 1:
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parameter = 7
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elif parameter == 3:
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parameter = 1
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elif parameter ==7:
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parameter = 3
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return str(calculated_checksum)[-1] == given_checksum
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def clean(self, value):
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super(CHIdentityCardNumberField, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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match = re.match(id_re, value)
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if not match:
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raise ValidationError(self.error_messages['invalid'])
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idnumber, pos9, checksum = match.groupdict()['idnumber'], match.groupdict()['pos9'], match.groupdict()['checksum']
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if idnumber == '00000000' or \
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idnumber == 'A0000000':
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raise ValidationError(self.error_messages['invalid'])
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all_digits = "%s%s%s" % (idnumber, pos9, checksum)
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if not self.has_valid_checksum(all_digits):
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raise ValidationError(self.error_messages['invalid'])
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return u'%s%s%s' % (idnumber, pos9, checksum)
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