attribute_kinds: add a birthdate field kind (fixes #21691)

Similar to date, it just checks that the given date is in the past.

src/authentic2/attribute_kinds.py

@@ -25,6 +25,23 @@ DEFAULT_TITLE_CHOICES = (
 )
 
 
+class BirthdateWidget(widgets.DateWidget):
+    def __init__(self, *args, **kwargs):
+        options = kwargs.setdefault('options', {})
+        options['endDate'] = '-1d'
+        super(BirthdateWidget, self).__init__(*args, **kwargs)
+
+
+class BirthdateField(forms.DateField):
+    widget = BirthdateWidget
+
+    def clean(self, value):
+        value = super(BirthdateField, self).clean(value)
+        if value and value >= datetime.date.today():
+            raise ValidationError(_('birthdate must be in the past.'))
+        return value
+
+
 @to_iter
 def get_title_choices():
     return app_settings.A2_ATTRIBUTE_KIND_TITLE_CHOICES or DEFAULT_TITLE_CHOICES
@@ -110,6 +127,14 @@ DEFAULT_ATTRIBUTE_KINDS = [
         'deserialize': lambda x: x and datetime.datetime.strptime(x, '%Y-%m-%d').date(),
         'rest_framework_field_class': serializers.DateField,
     },
+    {
+        'label': _('birthdate'),
+        'name': 'birthdate',
+        'field_class': BirthdateField,
+        'serialize': lambda x: x.isoformat(),
+        'deserialize': lambda x: x and datetime.datetime.strptime(x, '%Y-%m-%d').date(),
+        'rest_framework_field_class': serializers.DateField,
+    },
     {
         'label': _('french postcode'),
         'name': 'fr_postcode',

src/authentic2/locale/fr/LC_MESSAGES/django.po

@@ -199,6 +199,12 @@ msgstr "booléen"
 msgid "date"
 msgstr "date"
 
+msgid "birthdate must be in the past."
+msgstr "Une date de naissance doit être dans le passé."
+
+msgid "birthdate"
+msgstr "date de naissance"
+
 #: src/authentic2/attribute_kinds.py:114
 msgid "french postcode"
 msgstr "code postal"