--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/contrib/localflavor/is_/forms.py	Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,82 @@
+"""
+Iceland specific form helpers.
+"""
+
+from django.newforms import ValidationError
+from django.newforms.fields import RegexField, EMPTY_VALUES
+from django.newforms.widgets import Select
+from django.utils.translation import ugettext
+from django.utils.encoding import smart_unicode
+
+class ISIdNumberField(RegexField):
+    """
+    Icelandic identification number (kennitala). This is a number every citizen
+    of Iceland has.
+    """
+    default_error_messages = {
+        'invalid': ugettext('Enter a valid Icelandic identification number. The format is XXXXXX-XXXX.'),
+        'checksum': ugettext(u'The Icelandic identification number is not valid.'),
+    }
+
+    def __init__(self, *args, **kwargs):
+        kwargs['min_length'],kwargs['max_length'] = 10,11
+        super(ISIdNumberField, self).__init__(r'^\d{6}(-| )?\d{4}$', *args, **kwargs)
+
+    def clean(self, value):
+        value = super(ISIdNumberField, self).clean(value)
+
+        if value in EMPTY_VALUES:
+            return u''
+
+        value = self._canonify(value)
+        if self._validate(value):
+            return self._format(value)
+        else:
+            raise ValidationError(self.error_messages['checksum'])
+
+    def _canonify(self, value):
+        """
+        Returns the value as only digits.
+        """
+        return value.replace('-', '').replace(' ', '')
+
+    def _validate(self, value):
+        """
+        Takes in the value in canonical form and checks the verifier digit. The
+        method is modulo 11.
+        """
+        check = [3, 2, 7, 6, 5, 4, 3, 2, 1, 0]
+        return sum([int(value[i]) * check[i] for i in range(10)]) % 11 == 0
+
+    def _format(self, value):
+        """
+        Takes in the value in canonical form and returns it in the common
+        display format.
+        """
+        return smart_unicode(value[:6]+'-'+value[6:])
+
+class ISPhoneNumberField(RegexField):
+    """
+    Icelandic phone number. Seven digits with an optional hyphen or space after
+    the first three digits.
+    """
+    def __init__(self, *args, **kwargs):
+        kwargs['min_length'], kwargs['max_length'] = 7,8
+        super(ISPhoneNumberField, self).__init__(r'^\d{3}(-| )?\d{4}$', *args, **kwargs)
+
+    def clean(self, value):
+        value = super(ISPhoneNumberField, self).clean(value)
+
+        if value in EMPTY_VALUES:
+            return u''
+
+        return value.replace('-', '').replace(' ', '')
+
+class ISPostalCodeSelect(Select):
+    """
+    A Select widget that uses a list of Icelandic postal codes as its choices.
+    """
+    def __init__(self, attrs=None):
+        from is_postalcodes import IS_POSTALCODES
+        super(ISPostalCodeSelect, self).__init__(attrs, choices=IS_POSTALCODES)
+