--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/contrib/localflavor/cl/forms.py Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,94 @@
+"""
+Chile specific form helpers.
+"""
+
+from django.newforms import ValidationError
+from django.newforms.fields import RegexField, Select, EMPTY_VALUES
+from django.utils.translation import ugettext
+from django.utils.encoding import smart_unicode
+
+
+class CLRegionSelect(Select):
+ """
+ A Select widget that uses a list of Chilean Regions (Regiones)
+ as its choices.
+ """
+ def __init__(self, attrs=None):
+ from cl_regions import REGION_CHOICES
+ super(CLRegionSelect, self).__init__(attrs, choices=REGION_CHOICES)
+
+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
+ """
+ default_error_messages = {
+ 'invalid': ugettext('Enter a valid Chilean RUT.'),
+ 'strict': ugettext('Enter a valid Chilean RUT. The format is XX.XXX.XXX-X.'),
+ 'checksum': ugettext('The Chilean RUT is not valid.'),
+ }
+
+ 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]$',
+ error_message=self.default_error_messages['strict'], *args, **kwargs)
+ else:
+ # In non-strict mode, accept RUTs that validate but do not exist in
+ # the real world.
+ super(CLRutField, self).__init__(r'^[\d\.]{1,11}-?[\dkK]$', *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(self.error_messages['checksum'])
+
+ 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 u'0123456789K0'[11 - suma % 11]
+
+ def _canonify(self, rut):
+ """
+ Turns the RUT into one normalized format. Returns a (rut, verifier)
+ tuple.
+ """
+ rut = smart_unicode(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 u'%s-%s' % (code, verifier)
+