feat: show prominent warning about bank account change

weblate_web/payments/backends.py

@@ -234,7 +234,7 @@
 }
 
 
-def get_backend(name):
+def get_backend(name: str) -> type[Backend]:
     backend = BACKENDS[name]
     if backend.debug and not settings.PAYMENT_DEBUG:
         raise KeyError("Invalid backend")

weblate_web/payments/tests.py

@@ -17,8 +17,11 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 
+from __future__ import annotations
+
 import json
 from datetime import date
+from typing import cast
 
 import responses
 from django.core import mail
@@ -27,6 +30,7 @@
 from django.test import SimpleTestCase, TestCase
 from django.test.utils import override_settings
 
+from weblate_web.invoices.models import Invoice
 from weblate_web.tests import (
     THEPAY2_MOCK_SETTINGS,
     mock_vies,
@@ -273,7 +277,8 @@ def test_proforma(self):
         mail.outbox = []
 
         received = FIO_TRASACTIONS.copy()
-        proforma_id = backend.payment.draft_invoice.number
+        self.assertIsNotNone(backend.payment.draft_invoice)
+        proforma_id = cast(Invoice, backend.payment.draft_invoice).number
         transaction = received["accountStatement"]["transactionList"]["transaction"]  # type: ignore[index]
         transaction[0]["column16"]["value"] = proforma_id
         transaction[1]["column16"]["value"] = proforma_id

weblate_web/views.py

@@ -82,7 +82,12 @@
     process_donation,
     process_subscription,
 )
-from weblate_web.payments.backends import PaymentError, get_backend, list_backends
+from weblate_web.payments.backends import (
+    Backend,
+    PaymentError,
+    get_backend,
+    list_backends,
+)
 from weblate_web.payments.forms import CustomerForm
 from weblate_web.payments.models import Customer, Payment
 from weblate_web.payments.validators import cache_vies_data, validate_vatin
@@ -503,7 +508,7 @@ def dispatch(self, request, *args, **kwargs):
 
             # Get backend and refetch payment from the database
             try:
-                backend = get_backend(self.object.backend)(self.object)
+                backend: Backend = get_backend(self.object.backend)(self.object)
             except KeyError as error:
                 raise Http404("Non-existing backend") from error
 
@@ -516,6 +521,13 @@ def dispatch(self, request, *args, **kwargs):
             backend.complete(self.request)
             # If payment is still pending, display info page
             if backend.payment.state == Payment.PENDING:
+                if backend.name == "fio-bank":
+                    messages.info(
+                        request,
+                        gettext(
+                            "New company, new bank details! Pay with attention to the current invoice."
+                        ),
+                    )
                 return render(
                     request,
                     "payment/pending.html",