api: allow weekday name in recurring event display template (#80042)

chrono/api/views.py

@@ -176,6 +176,10 @@ def is_event_disabled(
 
 def get_event_text(event, agenda, day=None):
     event_text = force_str(event)
+
+    if day is not None:
+        event.weekday = ISO_WEEKDAYS[day].capitalize()
+
     if agenda.event_display_template:
         try:
             event_text = Template(agenda.event_display_template).render(
@@ -190,7 +194,7 @@ def get_event_text(event, agenda, day=None):
         )
     elif day is not None:
         event_text = _('%(weekday)s: %(event)s') % {
-            'weekday': ISO_WEEKDAYS[day].capitalize(),
+            'weekday': event.weekday,
             'event': event_text,
         }
     return event_text

tests/api/datetimes/test_recurring_events.py

@@ -123,6 +123,40 @@ def test_recurring_events_api_list(app, freezer):
     assert not any('example_event' in x['id'] for x in resp.json['data'])
 
 
+@pytest.mark.freeze_time('2021-12-13 14:00')
+def test_recurring_events_api_list_display_template(app):
+    agenda = Agenda.objects.create(label='Foo bar', kind='events')
+    Desk.objects.create(agenda=agenda, slug='_exceptions_holder')
+    Event.objects.create(label='Normal event', start_datetime=now(), places=5, agenda=agenda)
+    event = Event.objects.create(
+        label='Example Event',
+        start_datetime=now(),
+        recurrence_days=[1, 4, 5],  # Monday, Thursday, Friday
+        recurrence_end_date=now() + datetime.timedelta(days=30),
+        places=2,
+        agenda=agenda,
+    )
+    event.create_all_recurrences()
+
+    resp = app.get('/api/agendas/recurring-events/?agendas=%s' % agenda.slug)
+    assert [x['text'] for x in resp.json['data']] == [
+        'Monday: Example Event',
+        'Thursday: Example Event',
+        'Friday: Example Event',
+    ]
+
+    agenda.event_display_template = (
+        '{% if event.recurrence_days %}{{ event.weekday }}{% else %}{{ event }}{% endif %}'
+    )
+    agenda.save()
+
+    resp = app.get('/api/agendas/recurring-events/?agendas=%s' % agenda.slug)
+    assert [x['text'] for x in resp.json['data']] == ['Monday', 'Thursday', 'Friday']
+
+    resp = app.get('/api/agenda/%s/datetimes/' % agenda.slug)
+    assert [x['text'] for x in resp.json['data']][:3] == ['Example Event', 'Example Event', 'Example Event']
+
+
 @pytest.mark.freeze_time('2021-12-13 14:00')  # Monday of 50th week
 def test_recurring_events_api_list_shared_custody(app):
     agenda = Agenda.objects.create(