update displayed details about the invoice depending on payment date

Closes #5416

facturier/templates/facturier/tipi.html

@@ -55,7 +55,15 @@
       {{ invoice.creation_date|iso8601|date:"l j F Y" }}
       {% if invoice.prelevement_automatique %}
       <br />
-      Prélèvement automatique effectué le {{ invoice.expiration_date|iso8601|date:"l j F Y" }}
+      {% with expiration_date=invoice.expiration_date|iso8601 %}
+      Prélèvement automatique
+      {% if expiration_date < now %}
+      effectué
+      {% else %}
+      prévu
+      {% endif %}
+      le {{ expiration_date|date:"l j F Y" }}
+      {% endwith %}
       {% endif %}
     </p>
 

facturier/views.py

@@ -42,6 +42,7 @@ class InvoiceView(DetailView):
     def get_context_data(self):
         context = super(InvoiceView, self).get_context_data()
         context['invoice'] = self.invoice
+        context.update({'now': datetime.datetime.now()})
         return context
 
     def get(self, request, *args, **kwargs):