Fix #192 -- Disable bank import after last date of payments

src/pretix/plugins/banktransfer/templates/pretixplugins/banktransfer/import_form.html

@@ -2,6 +2,14 @@
 {% load i18n %}
 {% load bootstrap3 %}
 {% block inner %}
+    {% if no_more_payments %}
+        <div class="alert alert-danger">
+            {% blocktrans trimmed with date=request.event.settings.payment_term_last|date:"SHORT_DATE_FORMAT" %}
+                In the payment settings of your event, you set the {{ date }} as the last date of any payments.
+                Therefore, you won't be able to mark any order as paid here.
+            {% endblocktrans %}
+        </div>
+    {% else %}
         <div class="panel panel-default">
             <div class="panel-heading">
                 <h3 class="panel-title">{% trans "Upload a new file" %}</h3>
@@ -32,6 +40,7 @@
                 {% endif %}
             </div>
         </div>
+    {% endif %}
     {% if transactions_unhandled|length > 0 or request.GET.search %}
         <div class="panel panel-default">
             <div class="panel-heading">

src/pretix/plugins/banktransfer/views.py

@@ -354,4 +354,8 @@ class ImportView(EventPermissionRequiredMixin, ListView):
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data()
         ctx['job_running'] = self.job_running
+        ctx['no_more_payments'] = False
+        if self.request.event.settings.get('payment_term_last'):
+            if now() > self.request.event.payment_term_last:
+                ctx['no_more_payments'] = True
         return ctx