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

src/lib/components/checkout/OrderConfirmationItem.svelte

@@ -1,10 +1,12 @@
 <script lang="ts">
+	import { formatCurrency } from '$lib/utils/currency';
 	export let imgAlt = '';
 	export let imgSrc = '';
-	export let itemCategoryDescription = '';
+	// export let itemCategoryDescription = '';
 	export let itemName = '';
 	export let price = 0;
 	export let quantity = 0;
+	export let currency = 'gbp';
 </script>
 
 <div class="grid grid-cols-1 lg:grid-cols-2 min-[550px]:gap-6 border-b border-gray-200 py-6">
@@ -18,17 +20,17 @@
 			<h5 class="font-semibold text-xl leading-8 text-black max-[550px]:text-center">
 				{itemName}
 			</h5>
-			<p
+			<!-- <p
 				class="font-normal text-lg leading-8 text-gray-500 my-2 min-[550px]:my-3 max-[550px]:text-center"
 			>
 				{itemCategoryDescription}
-			</p>
+			</p> -->
 
 			<div class="flex items-center">
 				<h6
 					class="font-medium text-lg leading-8 text-indigo-600 max-[550px]:text-center pr-4 mr-4 border-r border-gray-200"
 				>
-					£ {price.toFixed(2)}
+					{ formatCurrency(price, currency) }
 				</h6>
 				<p class="font-medium text-base leading-7 text-black">
 					Qty: <span class="text-gray-500">{quantity}</span>
@@ -43,7 +45,7 @@
 		<h6
 			class="text-indigo-600 font-manrope font-bold text-2xl leading-9 w-full max-w-[176px] text-center"
 		>
-			£{(price * quantity).toFixed(2)}
+			{ formatCurrency(price, currency) }
 		</h6>
 	</div>
 </div>

src/lib/utils/currency.ts

@@ -0,0 +1,6 @@
+export function formatCurrency(amount: number, currency: string): string {
+  return new Intl.NumberFormat('en-GB', {
+    style: 'currency',
+    currency: currency,
+  }).format(amount);
+}

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
+	// Store the checkout session.id for access from the frontend
-	// https://docs.stripe.com/api/checkout/sessions/retrieve
+	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);
+};

src/routes/checkout/success/+page.svelte

@@ -2,19 +2,27 @@
 	import { onMount, onDestroy } from 'svelte';
 	import { basket, type Basket, type Item } from '$lib/stores/basket.js';
 	import OrderConfirmationItem from '$lib/components/checkout/OrderConfirmationItem.svelte';
+	import { formatCurrency } from '$lib/utils/currency';
+	import type { PageData } from './$types';
 
-	let orderConfirmationBasket: Basket;
+	export let data: PageData;
 	let localBasket: Basket;
 	const unsubscribe = basket.subscribe((value) => {
 		localBasket = value;
 	});
+
+	let { 
+		checkoutSession,
+		lineItems,
+		paymentStatus
+	} = data;
+
 	onDestroy(unsubscribe);
 
 	onMount(() => {
 		calculateSubtotal();
 
-		// Create a deep copy of the basket to store the order confirmation then clear the basket
+		// Clear the basket
-		orderConfirmationBasket = JSON.parse(JSON.stringify(localBasket));
 		localBasket = { items: [], subtotal: 0 };
 		basket.set(localBasket);
 		unsubscribe();
@@ -60,19 +68,17 @@
 				>
 			</div> -->
 			<div class="w-full px-3 min-[400px]:px-6">
-				{#if orderConfirmationBasket == undefined}
+				{#if lineItems.length == 0}
 					<p class="font-semibold text-lg leading-7 text-black text-center">
 						No items in the basket
 					</p>
 				{:else}
-					{#each orderConfirmationBasket.items as item (item.id)}
+					{#each lineItems as item (item.id)}
 						<OrderConfirmationItem
-							itemCategoryDescription={item.categoryDescription}
+							itemName={item.description}
-							itemName={item.name}
+							price={item.amount_total / 100}
-							imgAlt={item.imgAlt}
-							imgSrc={item.imgSrc}
-							price={item.price}
 							quantity={item.quantity}
+							currency={item.currency}
 						/>
 					{/each}
 				{/if}
@@ -82,7 +88,9 @@
 			>
 				<div class="flex flex-col sm:flex-row items-center max-lg:border-b border-gray-200"></div>
 				<p class="font-semibold text-lg text-black py-6">
-					Total Price: <span class="text-indigo-600"> $xx.xx</span>
+					{#if checkoutSession?.amount_total != null}
+						Total Price: <span class="text-indigo-600"> {formatCurrency(checkoutSession?.amount_total / 100, checkoutSession?.currency ?? 'gbp')}</span>
+					{/if}
 				</p>
 			</div>
 		</div>

src/routes/checkout/success/+page.ts

@@ -0,0 +1,27 @@
+import type { PageLoad } from './$types';
+import { redirect } from '@sveltejs/kit';
+import Stripe from 'stripe';
+
+export const load: PageLoad = async ({fetch}) => {
+  const response = await fetch('/api/checkout/status');
+	if (!response.ok) {
+		console.error('Failed to fetch checkout status');
+		return;
+	}
+
+	const responseJson = await response.json();
+	const checkoutSession: Stripe.Checkout.Session = responseJson.checkoutSession;
+	const lineItems: Stripe.LineItem[] = responseJson.lineItems.data;
+	const paymentStatus: Stripe.Checkout.Session.PaymentStatus = responseJson.paymentStatus;
+
+	if (paymentStatus == 'unpaid') {
+		throw redirect(303, '/checkout/cancelled');
+	}
+
+	return {
+		checkoutSession,
+		lineItems,
+		paymentStatus
+	};
+};
+