Delete pending customer if deleting custorder batch

also invoke handler to update pending customer info for batch, so the
handler can add validation, e.g. unique email address check

tailbone/views/custorders/orders.py

@@ -302,6 +302,13 @@ class CustomerOrderView(MasterView):
         return batch
 
     def start_over_entirely(self, batch):
+
+        # delete pending customer if present
+        pending = batch.pending_customer
+        if pending:
+            batch.pending_customer = None
+            self.Session.delete(pending)
+
         # just delete current batch outright
         # TODO: should use self.handler.do_delete() instead?
         self.Session.delete(batch)
@@ -314,6 +321,13 @@ class CustomerOrderView(MasterView):
         return self.redirect(url)
 
     def delete_batch(self, batch):
+
+        # delete pending customer if present
+        pending = batch.pending_customer
+        if pending:
+            batch.pending_customer = None
+            self.Session.delete(pending)
+
         # just delete current batch outright
         # TODO: should use self.handler.do_delete() instead?
         self.Session.delete(batch)
@@ -488,33 +502,11 @@ class CustomerOrderView(MasterView):
         }
 
     def update_pending_customer(self, batch, data):
-        model = self.model
-        app = self.get_rattail_app()
-        people = app.get_people_handler()
 
-        # clear out any contact it may have
-        self.handler.unassign_contact(batch)
-
-        # create pending customer if needed
-        pending = batch.pending_customer
-        if not pending:
-            pending = model.PendingCustomer()
-            pending.user = self.request.user
-            pending.status_code = self.enum.PENDING_CUSTOMER_STATUS_PENDING
-            batch.pending_customer = pending
-
-        # update pending customer info
-        pending.first_name = data['first_name']
-        pending.last_name = data['last_name']
-        pending.display_name = people.normalize_full_name(pending.first_name,
-                                                          pending.last_name)
-        pending.phone_number = app.format_phone_number(data['phone_number'])
-        pending.email_address = data['email_address']
-
-        # also update the batch w/ contact info
-        batch.contact_name = pending.display_name
-        batch.phone_number = pending.phone_number
-        batch.email_address = pending.email_address
+        try:
+            self.handler.update_pending_customer(batch, self.request.user, data)
+        except Exception as error:
+            return {'error': six.text_type(error)}
 
         self.Session.flush()
         context = self.get_context_contact(batch)