Send refund webhooks correctly when refunds are created via API

src/pretix/api/views/order.py

@@ -1610,6 +1610,17 @@ class RefundViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
                 user=request.user if request.user.is_authenticated else None,
                 auth=request.auth
             )
+
+            if r.state in (OrderRefund.REFUND_STATE_DONE, OrderRefund.REFUND_STATE_CANCELED, OrderRefund.REFUND_STATE_FAILED):
+                r.order.log_action(
+                    f'pretix.event.order.refund.{r.state}', {
+                        'local_id': r.local_id,
+                        'provider': r.provider,
+                    },
+                    user=request.user if request.user.is_authenticated else None,
+                    auth=request.auth
+                )
+
             if mark_refunded:
                 try:
                     mark_order_refunded(

src/tests/api/test_orders.py

@@ -1517,6 +1517,25 @@ def test_refund_create_mark_refunded(token_client, organizer, event, order):
     assert order.status == Order.STATUS_CANCELED
 
 
+@pytest.mark.django_db
+def test_refund_create_webhook_sent(token_client, organizer, event, order):
+    res = copy.deepcopy(REFUND_CREATE_PAYLOAD)
+    res['state'] = "done"
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/{}/refunds/'.format(
+            organizer.slug, event.slug, order.code
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    with scopes_disabled():
+        r = order.refunds.get(local_id=resp.data['local_id'])
+    assert r.provider == "manual"
+    assert r.amount == Decimal("23.00")
+    assert r.state == "done"
+    with scopes_disabled():
+        assert order.all_logentries().get(action_type="pretix.event.order.refund.done")
+
+
 @pytest.mark.django_db
 def test_refund_optional_fields(token_client, organizer, event, order):
     res = copy.deepcopy(REFUND_CREATE_PAYLOAD)