support: Show annual revenue for active fixed price plans.

In the activity and support views, we want to see the annual
revenue for fixed price plans. While on billing pages, we do
not display this information as these plans are renegotiated
annually.

Adds get_annual_recurring_revenue_for_support_data function
to BillingSession class, so that we can get the fixed price
plan data for these views without changing the logic for
what is displayed on the billing pages.

corporate/lib/activity.py

@@ -191,13 +191,13 @@ def get_remote_activity_plan_data(
     elif remote_realm is not None:
         renewal_cents = RemoteRealmBillingSession(
             remote_realm=remote_realm
-        ).get_customer_plan_renewal_amount(plan, license_ledger)
+        ).get_annual_recurring_revenue_for_support_data(plan, license_ledger)
         current_rate = get_plan_rate_percentage(plan.discount)
     else:
         assert remote_server is not None
         renewal_cents = RemoteServerBillingSession(
             remote_server=remote_server
-        ).get_customer_plan_renewal_amount(plan, license_ledger)
+        ).get_annual_recurring_revenue_for_support_data(plan, license_ledger)
         current_rate = get_plan_rate_percentage(plan.discount)
 
     if plan.billing_schedule == CustomerPlan.BILLING_SCHEDULE_MONTHLY:
@@ -238,7 +238,7 @@ def get_estimated_arr_and_rate_by_realm() -> Tuple[Dict[str, int], Dict[str, str
         assert latest_ledger_entry is not None
         renewal_cents = RealmBillingSession(
             realm=plan.customer.realm
-        ).get_customer_plan_renewal_amount(plan, latest_ledger_entry)
+        ).get_annual_recurring_revenue_for_support_data(plan, latest_ledger_entry)
         if plan.billing_schedule == CustomerPlan.BILLING_SCHEDULE_MONTHLY:
             renewal_cents *= 12
         annual_revenue[plan.customer.realm.string_id] = renewal_cents

corporate/lib/stripe.py

@@ -2305,6 +2305,16 @@ def get_next_plan(self, plan: CustomerPlan) -> Optional[CustomerPlan]:
             ).first()
         return None
 
+    def get_annual_recurring_revenue_for_support_data(
+        self, plan: CustomerPlan, last_ledger_entry: LicenseLedger
+    ) -> int:
+        if plan.fixed_price is not None:
+            # For support and activity views, we want to show the annual
+            # revenue for the currently configured fixed price, which
+            # is the annual amount charged in cents.
+            return plan.fixed_price
+        return self.get_customer_plan_renewal_amount(plan, last_ledger_entry)
+
     def get_customer_plan_renewal_amount(
         self,
         plan: CustomerPlan,

corporate/lib/support.py

@@ -281,7 +281,7 @@ def get_plan_data_for_support_view(
         annual_invoice_count = get_annual_invoice_count(plan_data.current_plan.billing_schedule)
         if last_ledger_entry is not None:
             plan_data.annual_recurring_revenue = (
-                billing_session.get_customer_plan_renewal_amount(
+                billing_session.get_annual_recurring_revenue_for_support_data(
                     plan_data.current_plan, last_ledger_entry
                 )
                 * annual_invoice_count

corporate/tests/test_activity_views.py

@@ -367,6 +367,6 @@ def add_audit_log_data(
         add_audit_log_data(realm.server, remote_realm=realm, realm_id=None)
 
         self.login("iago")
-        with self.assert_database_query_count(12):
+        with self.assert_database_query_count(11):
             result = self.client_get("/activity/remote")
             self.assertEqual(result.status_code, 200)