templates: add datetime_in_past filter (#44023)

tests/test_templates.py

@@ -10,10 +10,10 @@ except ImportError:
     langdetect = None
 
 from django.test import override_settings
+from django.utils.timezone import now
 from quixote import cleanup
 from wcs.qommon.substitution import CompatibilityNamesDict
 from wcs.qommon.template import Template, TemplateError
-from wcs.conditions import Condition
 from wcs.variables import LazyFormData
 from wcs.formdef import FormDef
 from wcs import fields
@@ -658,3 +658,34 @@ def test_language_detect():
     assert t.render({'plop': 'Good morning world'}) == 'en'
     assert t.render({'plop': 'Bonjour tout le monde'}) == 'fr'
     assert t.render({'plop': '2132133'}) == ''
+
+
+@pytest.mark.parametrize('value, expected', [
+    (None, False),
+    ('', False),
+    ('foobar', False),
+    (42, False),
+    ('1970-06-15T12:01:03', True),
+    ('2500-06-15T12:01:02', False),
+    ('1970-01-01 02:03', True),
+    ('2500-01-01 02:03', False),
+    ('01/01/1970 02h03', True),
+    ('01/01/2500 02h03', False),
+    ('1970-01-01', True),
+    ('2500-01-01', False),
+    ('01/01/1970', True),
+    ('01/01/2500', False),
+    (datetime.datetime(1970, 6, 15, 12, 1, 3), True),
+    (datetime.datetime(2500, 6, 15, 12, 1, 2), False),
+    (datetime.date(1970, 6, 15), True),
+    (datetime.date(2500, 6, 15), False),
+    (datetime.datetime.now(), True),
+    (datetime.datetime.now() + datetime.timedelta(hours=1), False),
+    (now(), True),
+    (now() + datetime.timedelta(hours=1), False),
+    (datetime.date.today(), True),
+    (datetime.date.today() + datetime.timedelta(days=1), False),
+])
+def test_datetime_in_past(value, expected):
+    t = Template('{{ value|datetime_in_past }}')
+    assert t.render({'value': value}) == str(expected)

wcs/qommon/templatetags/qommon.py

@@ -38,6 +38,7 @@ from django.utils import dateparse
 from django.utils import six
 from django.utils.encoding import force_bytes, force_text
 from django.utils.safestring import mark_safe
+from django.utils.timezone import is_naive, make_aware
 from wcs.qommon import evalutils
 from wcs.qommon import tokens
 from wcs.qommon.admin.texts import TextsDirectory
@@ -268,6 +269,18 @@ def age_in_months(value, today=None):
     return years*12 + months
 
 
+@register.filter(expects_localtime=True)
+def datetime_in_past(value):
+    value = parse_datetime(value)
+    if not value:
+        return False
+
+    if is_naive(value):
+        value = make_aware(value)
+    date_now = make_aware(datetime.datetime.now())
+    return value <= date_now
+
+
 @register.simple_tag
 def standard_text(text_id):
     return mark_safe(TextsDirectory.get_html_text(str(text_id)))