def dispatch(self, request, *args, **kwargs):
with transaction.atomic(using="payments_db"):
self.object = self.get_object()
# User should choose method for new payment
if self.object.state == Payment.NEW:
return redirect("payment", pk=self.object.pk)
# Get backend and refetch payment from the database
backend = get_backend(self.object.backend)(self.object)
# Allow reprocessing of rejected payments. User might choose
# to retry in the payment gateway and previously rejected payment
# can be now completed.
if backend.payment.state not in (Payment.PENDING,
Payment.REJECTED):
return self.redirect_origin()
backend.complete(self.request)
# If payment is still pending, display info page
if backend.payment.state == Payment.PENDING:
return render(
request,
"payment/pending.html",
{
"object": backend.payment,
"backend": backend
},
)
return self.redirect_origin()
def form_valid(self, form):
if not self.can_pay:
return redirect("payment", pk=self.object.pk)
# Actualy call the payment backend
method = form.cleaned_data["method"]
backend = get_backend(method)(self.object)
result = backend.initiate(
self.request,
self.request.build_absolute_uri(
reverse("payment", kwargs={"pk": self.object.pk})),
self.request.build_absolute_uri(
reverse("payment-complete", kwargs={"pk": self.object.pk})),
)
if result is not None:
return result
backend.complete(self.request)
return self.redirect_origin()
