stripe: Use 'get_price_per_license' in 'get_initial_upgrade_context'.

This commit updates the 'get_initial_upgrade_context' method
to use 'get_price_per_license' for determining 'annual_price'
and 'monthly_price' based on tier and discount instead of hardcoding.

Also, removed the 'percent_off' page_params as
'get_price_per_license' already performs the price calculation
taking discount into consideration.

corporate/lib/stripe.py

@@ -450,6 +450,7 @@ class UpgradeRequest:
 class InitialUpgradeRequest:
     onboarding: bool
     manual_license_management: bool
+    tier: int
 
 
 class AuditLogEventType(Enum):
@@ -1239,6 +1240,7 @@ class BillingSession(ABC):
 
         seat_count = self.current_count_for_billed_licenses()
         signed_seat_count, salt = sign_string(str(seat_count))
+        tier = initial_upgrade_request.tier
         context: Dict[str, Any] = {
             "seat_count": seat_count,
             "signed_seat_count": signed_seat_count,
@@ -1251,9 +1253,8 @@ class BillingSession(ABC):
             "onboarding": onboarding,
             "page_params": {
                 "seat_count": seat_count,
-                "annual_price": 8000,
-                "monthly_price": 800,
-                "percent_off": float(percent_off),
+                "annual_price": get_price_per_license(tier, CustomerPlan.ANNUAL, percent_off),
+                "monthly_price": get_price_per_license(tier, CustomerPlan.MONTHLY, percent_off),
             },
             "manual_license_management": initial_upgrade_request.manual_license_management,
         }

corporate/views/upgrade.py

@@ -17,7 +17,7 @@ from corporate.lib.stripe import (
     UpgradeRequest,
 )
 from corporate.lib.support import get_support_url
-from corporate.models import ZulipSponsorshipRequest
+from corporate.models import CustomerPlan, ZulipSponsorshipRequest
 from zerver.actions.users import do_change_is_billing_admin
 from zerver.decorator import require_organization_member, zulip_login_required
 from zerver.lib.request import REQ, has_request_variables
@@ -94,6 +94,7 @@ def initial_upgrade(
     initial_upgrade_request = InitialUpgradeRequest(
         onboarding=onboarding,
         manual_license_management=manual_license_management,
+        tier=CustomerPlan.STANDARD,
     )
     billing_session = RealmBillingSession(user)
     redirect_url, context = billing_session.get_initial_upgrade_context(initial_upgrade_request)

web/src/billing/page_params.ts

@@ -6,7 +6,6 @@ import $ from "jquery";
 export const page_params: {
     annual_price: number;
     monthly_price: number;
-    percent_off: number;
     seat_count: number;
 } = $("#page-params").data("params");
 

web/src/billing/upgrade.ts

@@ -8,8 +8,8 @@ import type {Prices} from "./helpers";
 import {page_params} from "./page_params";
 
 const prices: Prices = {
-    annual: page_params.annual_price * (1 - page_params.percent_off / 100),
-    monthly: page_params.monthly_price * (1 - page_params.percent_off / 100),
+    annual: page_params.annual_price,
+    monthly: page_params.monthly_price,
 };
 
 const ls = localstorage();