feat(#1): use stripe session to populate checkout success

src/routes/api/checkout/+server.ts

@@ -5,7 +5,7 @@ import stripe from 'stripe';
 const stripeClient = new stripe(PUBLIC_STRIPE_SECRET_KEY);
 
 // Create a checkout session
-export const POST: RequestHandler = async ({ request }) => {
+export const POST: RequestHandler = async ({ request, cookies }) => {
 	const formData = new URLSearchParams(await request.text());
 	const items: { priceId: string; quantity: number }[] = [];
 
@@ -26,8 +26,7 @@ export const POST: RequestHandler = async ({ request }) => {
 		cancel_url: `${request.headers.get('origin')}/checkout/cancelled`
 	});
 
-	// TODO - Store the checkout session.id for access from the frontend
-	// https://docs.stripe.com/api/checkout/sessions/retrieve
-
+	// Store the checkout session.id for access from the frontend
+	cookies.set('checkout_session_id', session.id, { path: '/' });
 	return redirect(303, session.url as string);
 };

src/routes/api/checkout/status/+server.ts

@@ -0,0 +1,21 @@
+import { json } from '@sveltejs/kit';
+import { PUBLIC_STRIPE_SECRET_KEY } from '$env/static/public';
+import stripe from 'stripe';
+import type { RequestHandler } from './$types';
+const stripeClient = new stripe(PUBLIC_STRIPE_SECRET_KEY);
+
+export const GET: RequestHandler = async ({ cookies }) => {
+  const sessionId = cookies.get('checkout_session_id');
+	if (!sessionId) {
+		return json({ error: 'No checkout session found' }, { status: 400 });
+	}
+	const checkoutSession = await stripeClient.checkout.sessions.retrieve(sessionId, { expand: ['line_items'] });
+
+	const statusResponse = {
+		checkoutSession: checkoutSession,
+		paymentStatus: checkoutSession.payment_status,
+		lineItems: checkoutSession.line_items
+	};
+
+	return json(statusResponse);
+};