Introduce cancellation requests (#1627)

* Allow to adjust the cancellation fee without JS

* Introduce cancellation requests

* ignore→delete

* Change a few things after Martin's review

* Add a few tests

src/tests/control/test_orders.py

@@ -2205,3 +2205,41 @@ def test_refund_list(client, env):
     response = client.get('/control/event/dummy/dummy/orders/refunds/?status=all&provider=banktransfer')
     assert 'R-1' in response.content.decode()
     assert 'R-2' not in response.content.decode()
+
+
+@pytest.mark.django_db
+def test_delete_cancellation_request(client, env):
+    with scopes_disabled():
+        r = env[2].cancellation_requests.create(
+            cancellation_fee=Decimal('4.00'),
+            refund_as_giftcard=True
+        )
+    client.login(email='dummy@dummy.dummy', password='dummy')
+    response = client.post('/control/event/dummy/dummy/orders/FOO/cancellationrequests/{}/delete'.format(r.pk), {},
+                           follow=True)
+    assert 'alert-success' in response.content.decode()
+    assert not env[2].cancellation_requests.exists()
+
+
+@pytest.mark.django_db
+def test_approve_cancellation_request(client, env):
+    with scopes_disabled():
+        o = Order.objects.get(id=env[2].id)
+        o.payments.create(state=OrderPayment.PAYMENT_STATE_CONFIRMED, amount=o.total)
+        o.status = Order.STATUS_PAID
+        o.save()
+        r = env[2].cancellation_requests.create(
+            cancellation_fee=Decimal('4.00'),
+            refund_as_giftcard=True
+        )
+    client.login(email='dummy@dummy.dummy', password='dummy')
+    response = client.get('/control/event/dummy/dummy/orders/FOO/transition?status=c&req={}'.format(r.pk), {})
+    doc = BeautifulSoup(response.content.decode(), "lxml")
+    assert doc.select('input[name=cancellation_fee]')[0]['value'] == '4.00'
+    response = client.post('/control/event/dummy/dummy/orders/FOO/transition?req={}'.format(r.pk), {
+        'status': 'c',
+        'cancellation_fee': '4.00'
+    }, follow=True)
+    doc = BeautifulSoup(response.content.decode(), "lxml")
+    assert doc.select('input[name=refund-new-giftcard]')[0]['value'] == '10.00'
+    assert not env[2].cancellation_requests.exists()

src/tests/control/test_permissions.py

@@ -110,6 +110,7 @@ event_urls = [
     "orders/ABC/approve",
     "orders/ABC/deny",
     "orders/ABC/checkvatid",
+    "orders/ABC/cancellationrequests/1/delete",
     "orders/ABC/payments/1/cancel",
     "orders/ABC/payments/1/confirm",
     "orders/ABC/refund",

src/tests/plugins/badges/test_pdf.py

@@ -69,6 +69,7 @@ def test_generate_pdf(env):
     pdf = PdfFileReader(BytesIO(buf))
     assert pdf.numPages == 2
 
+
 @pytest.mark.django_db
 def test_generate_pdf_multi(env):
     event, order, shirt = env

src/tests/presale/test_orders.py

@@ -399,6 +399,33 @@ class OrdersTest(BaseOrdersTest):
         self.order.refresh_from_db()
         assert self.order.status == Order.STATUS_CANCELED
 
+    def test_orders_cancel_paid_request(self):
+        self.order.status = Order.STATUS_PAID
+        self.order.save()
+        with scopes_disabled():
+            self.order.payments.create(provider='testdummy_partialrefund', amount=self.order.total, state=OrderPayment.PAYMENT_STATE_CONFIRMED)
+        self.event.settings.cancel_allow_user_paid = True
+        self.event.settings.cancel_allow_user_paid_keep = Decimal('3.00')
+        self.event.settings.cancel_allow_user_paid_require_approval = True
+        response = self.client.get(
+            '/%s/%s/order/%s/%s/cancel' % (self.orga.slug, self.event.slug, self.order.code, self.order.secret)
+        )
+        assert response.status_code == 200
+        response = self.client.post(
+            '/%s/%s/order/%s/%s/cancel/do' % (self.orga.slug, self.event.slug, self.order.code, self.order.secret), {
+            }, follow=True)
+        self.assertRedirects(response,
+                             '/%s/%s/order/%s/%s/' % (self.orga.slug, self.event.slug, self.order.code,
+                                                      self.order.secret),
+                             target_status_code=200)
+        self.order.refresh_from_db()
+        assert self.order.status == Order.STATUS_PAID
+        assert self.order.total == Decimal('23.00')
+        with scopes_disabled():
+            assert not self.order.refunds.exists()
+            r = self.order.cancellation_requests.get()
+            assert r.cancellation_fee == Decimal('3.00')
+
     def test_orders_cancel_paid_fee_autorefund_gift_card_optional(self):
         self.order.status = Order.STATUS_PAID
         self.order.save()