66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
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"""
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Israeli-specific form helpers
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"""
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import re
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from django.core.exceptions import ValidationError
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from django.forms.fields import RegexField, Field, EMPTY_VALUES
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from django.utils.checksums import luhn
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from django.utils.translation import ugettext_lazy as _
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# Israeli ID numbers consist of up to 8 digits followed by a checksum digit.
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# Numbers which are shorter than 8 digits are effectively left-zero-padded.
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# The checksum digit is occasionally separated from the number by a hyphen,
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# and is calculated using the luhn algorithm.
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#
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# Relevant references:
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#
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# (hebrew) http://he.wikipedia.org/wiki/%D7%9E%D7%A1%D7%A4%D7%A8_%D7%96%D7%94%D7%95%D7%AA_(%D7%99%D7%A9%D7%A8%D7%90%D7%9C)
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# (hebrew) http://he.wikipedia.org/wiki/%D7%A1%D7%A4%D7%A8%D7%AA_%D7%91%D7%99%D7%A7%D7%95%D7%A8%D7%AA
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id_number_re = re.compile(r'^(?P<number>\d{1,8})-?(?P<check>\d)$')
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class ILPostalCodeField(RegexField):
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"""
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A form field that validates its input as an Israeli postal code.
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Valid form is XXXXX where X represents integer.
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"""
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default_error_messages = {
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'invalid': _(u'Enter a postal code in the format XXXXX'),
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}
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def __init__(self, *args, **kwargs):
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super(ILPostalCodeField, self).__init__(r'^\d{5}$', *args, **kwargs)
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def clean(self, value):
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if value is not None:
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value = value.replace(" ", "")
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return super(ILPostalCodeField, self).clean(value)
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class ILIDNumberField(Field):
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"""
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A form field that validates its input as an Israeli identification number.
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Valid form is per the Israeli ID specification.
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"""
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default_error_messages = {
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'invalid': _(u'Enter a valid ID number.'),
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}
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def clean(self, value):
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value = super(ILIDNumberField, self).clean(value)
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if value in EMPTY_VALUES:
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return u''
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match = id_number_re.match(value)
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if not match:
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raise ValidationError(self.error_messages['invalid'])
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value = match.group('number') + match.group('check')
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if not luhn(value):
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raise ValidationError(self.error_messages['invalid'])
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return value
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