Add button to update invoice

Allow the recipient on an invoice to be updated without creating a new invoice.
This allows fixing of mistakes easily, especially for when it is given to someone
else to pay and a new invoice would be confusing.

pinaxcon/templates/registrasion/invoice.html

@@ -32,10 +32,15 @@
 
   {% elif invoice.is_paid %}
   {% if user.is_staff %}
-  <a class="btn btn-default" href="{% url "manual_payment" invoice.id %}">Apply manual payment/refund</a>
-  <a class="btn btn-default" href="{% url "refund" invoice.id %}">Refund by issuing credit note</a>
+  <a class="btn btn-primary" href="{% url "manual_payment" invoice.id %}">Apply manual payment/refund</a>
+  <a class="btn btn-secondary" href="{% url "refund" invoice.id %}">Refund by issuing credit note</a>
   {% endif %}
   {% endif %}
+
+  {% if user.is_staff %}
+  <a class="btn btn-info" href="{% url "attendee" invoice.user.id %}">View attendee</a>
+  <a class="btn btn-light" href="{% url "invoice_update" invoice.id %}">Refresh recipient</a>
+  {% endif %}
 </div>
 
 {% endblock %}

vendor/registrasion/registrasion/controllers/invoice.py

@@ -172,12 +172,7 @@ class InvoiceController(ForId, object):
         issued = timezone.now()
         due = max(issued, min_due_time)
 
-        # Get the invoice recipient
-        profile = people.AttendeeProfileBase.objects.get_subclass(
-            id=user.attendee.attendeeprofilebase.id,
-        )
-        recipient = profile.invoice_recipient()
-
+        recipient = cls._recipient(user)
         invoice_value = sum(item.quantity * item.price for item in line_items)
 
         invoice = commerce.Invoice.objects.create(
@@ -228,6 +223,22 @@ class InvoiceController(ForId, object):
 
         invoice.refresh_from_db()
 
+    @classmethod
+    def _recipient(cls, user):
+        ''' Get the invoice recipient. '''
+        profile = people.AttendeeProfileBase.objects.get_subclass(
+            id=user.attendee.attendeeprofilebase.id,
+        )
+        recipient = profile.invoice_recipient()
+        return recipient
+
+    def update_recipient(self):
+        ''' Update the recipient of the invoice based on the current
+        attendee data. '''
+
+        self.invoice.recipient = self._recipient(self.invoice.user)
+        self.invoice.save()
+
     def can_view(self, user=None, access_code=None):
         ''' Returns true if the accessing user is allowed to view this invoice,
         or if the given access code matches this invoice's user's access code.

vendor/registrasion/registrasion/urls.py

@@ -17,6 +17,7 @@ from .views import (
     invoice,
     invoice_access,
     invoice_mailout,
+    invoice_update,
     manual_payment,
     product_category,
     refund,
@@ -43,8 +44,8 @@ public = [
     url(r"^invoice/([0-9]+)/([A-Z0-9]+)$", invoice, name="invoice"),
     url(r"^invoice/([0-9]+)/manual_payment$",
         manual_payment, name="manual_payment"),
-    url(r"^invoice/([0-9]+)/refund$",
-        refund, name="refund"),
+    url(r"^invoice/([0-9]+)/refund$", refund, name="refund"),
+    url(r"^invoice/([0-9]+)/update$", invoice_update, name="invoice_update"),
     url(r"^invoice_access/([A-Z0-9]+)$", invoice_access,
         name="invoice_access"),
     url(r"^invoice_mailout$", invoice_mailout, name="invoice_mailout"),

vendor/registrasion/registrasion/views.py

@@ -711,7 +711,8 @@ def checkout(request, user_id=None):
 
     current_cart = CartController.for_user(user)
 
-    if "fix_errors" in request.GET and request.GET["fix_errors"] == "true":
+    fix_errors = request.GET.get("fix_errors") == "true"
+    if fix_errors:
         current_cart.fix_simple_errors()
 
     try:
@@ -719,6 +720,9 @@ def checkout(request, user_id=None):
     except ValidationError as ve:
         return _checkout_errors(request, ve)
 
+    if fix_errors:
+        current_invoice.update_recipient()
+
     return redirect("invoice", current_invoice.invoice.id)
 
 
@@ -825,6 +829,19 @@ def invoice(request, invoice_id, access_code=None):
     return render(request, "registrasion/invoice.html", data)
 
 
+def invoice_update(request, invoice_id):
+    ''' Updates an invoice to have the latest recipient information. '''
+
+    current_invoice = InvoiceController.for_id_or_404(invoice_id)
+
+    if not current_invoice.can_view(user=request.user):
+        raise Http404()
+
+    current_invoice.update_recipient()
+
+    return redirect("invoice", current_invoice.invoice.id)
+
+
 def _staff_only(user):
     ''' Returns true if the user is staff. '''
     return user.is_staff