Create FailedInvoice when invoice.payment_failed webhook is fired

Also set the context parameters for sending emails

webhook/views.py

@@ -7,7 +7,9 @@ from django.http import HttpResponse
 from django.views.decorators.csrf import csrf_exempt
 from django.views.decorators.http import require_POST
 
-from hosting.models import MonthlyHostingBill, HostingBillLineItem
+from hosting.models import (
+    MonthlyHostingBill, HostingBillLineItem, FailedInvoice
+)
 from membership.models import StripeCustomer
 from utils.mailer import BaseEmail
 from utils.tasks import send_plain_email_task
@@ -110,9 +112,15 @@ def handle_invoice_webhook(request):
         send_plain_email_task.delay(email_to_admin_data)
 
     elif event.type == "invoice.payment_failed":
+        # Create a failed invoice, so that we have a trace of which invoices
+        # need a followup
+        FailedInvoice.create(
+            stripe_customer, number_of_attempts = 1, invoice_id=invoice.id
+        )
+        VM_ID = invoice.lines.data[0].metadata["VM_ID"]
         admin_msg_sub = "Invoice payment FAILED for user {} and {}".format(
             stripe_customer.user.email,
-            invoice.lines.data.metadata
+            VM_ID
         )
         logger.error(admin_msg_sub)
         # send email to admin
@@ -128,6 +136,8 @@ def handle_invoice_webhook(request):
             'base_url': "{0}://{1}".format(request.scheme,
                                            request.get_host()),
             'dcl_text': settings.DCL_TEXT,
+            'VM_ID': VM_ID,
+            'number_of_remaining_hours': 48 # for the first failure we wait 48 hours
         }
         email_data = {
             'subject': 'IMPORTANT: The payment for VM {VM_ID} at {dcl_text} failed'.format(