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Fixed #4122 -- Added Chilean localflavor. Thanks, marijn@metronomo.cl.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@5087 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| """ | ||
| Chile specific form helpers. | ||
| """ | ||
| from django.newforms import ValidationError | ||
| from django.newforms.fields import RegexField, EMPTY_VALUES | ||
| from django.utils.translation import gettext | ||
|
|
||
| class CLRutField(RegexField): | ||
| """ | ||
| Chilean "Rol Unico Tributario" (RUT) field. This is the Chilean national | ||
| identification number. | ||
| Samples for testing are available from | ||
| https://palena.sii.cl/cvc/dte/ee_empresas_emisoras.html | ||
| """ | ||
| def __init__(self, *args, **kwargs): | ||
| if 'strict' in kwargs: | ||
| del kwargs['strict'] | ||
| super(CLRutField, self).__init__(r'^(\d{1,2}\.)?\d{3}\.\d{3}-[\dkK]$', | ||
| error_message=gettext('Enter valid a Chilean RUT. The format is XX.XXX.XXX-X.'), | ||
| *args, **kwargs) | ||
| else: | ||
| # In non-strict mode, accept RUTs that validate but do not exist in | ||
| # the real world. | ||
| super(CLRutField, self).__init__(r'^[\d\.]{1,11}-?[\dkK]$', error_message=gettext(u'Enter valid a Chilean RUT'), *args, **kwargs) | ||
|
|
||
| def clean(self, value): | ||
| """ | ||
| Check and clean the chilean rut. | ||
| """ | ||
| super(CLRutField, self).clean(value) | ||
| if value in EMPTY_VALUES: | ||
| return u'' | ||
| rut, verificador = self._canonify(value) | ||
| if self._algorithm(rut) == verificador: | ||
| return self._format(rut, verificador) | ||
| else: | ||
| raise ValidationError(u'The Chilean RUT is not valid.') | ||
|
|
||
| def _algorithm(self, rut): | ||
| """ | ||
| Takes RUT in pure canonical form, calculates the verifier digit. | ||
| """ | ||
| suma = 0 | ||
| multi = 2 | ||
| for r in rut[::-1]: | ||
| suma += int(r) * multi | ||
| multi += 1 | ||
| if multi == 8: | ||
| multi = 2 | ||
| return '0123456789K0'[11 - suma % 11] | ||
|
|
||
| def _canonify(self, rut): | ||
| """ | ||
| Turns the RUT into one normalized format. Returns a (rut, verifier) | ||
| tuple. | ||
| """ | ||
| rut = str(rut).replace(' ', '').replace('.', '').replace('-', '') | ||
| return rut[:-1], rut[-1] | ||
|
|
||
| def _format(self, code, verifier=None): | ||
| """ | ||
| Formats the RUT from canonical form to the common string representation. | ||
| If verifier=None, then the last digit in 'code' is the verifier. | ||
| """ | ||
| if verifier is None: | ||
| verifier = code[-1] | ||
| code = code[:-1] | ||
| while len(code) > 3 and '.' not in code[:3]: | ||
| pos = code.find('.') | ||
| if pos == -1: | ||
| new_dot = -3 | ||
| else: | ||
| new_dot = pos - 3 | ||
| code = code[:new_dot] + '.' + code[new_dot:] | ||
| return '%s-%s' % (code, verifier) | ||
|
|
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