feat(#32): Add separate flow for subscriptions

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

@@ -0,0 +1,41 @@
+import { type RequestHandler, redirect } from '@sveltejs/kit';
+import { stripe as stripeClient } from '$lib/utils/stripe';
+
+// Create a subscription checkout session
+export const POST: RequestHandler = async ({ request, cookies, locals: { safeGetSession } }) => {
+	const { session } = await safeGetSession();
+
+	if (!session) {
+		// If no session is found, the user isn't authenticated, so block the action
+		return new Response('Unauthorized', { status: 401 });
+	}
+
+	const userId = session.user.id;
+
+	// Get the price ID from the request body
+	const { priceId } = await request.json();
+
+	if (!priceId) {
+		return new Response('Price ID is required', { status: 400 });
+	}
+
+	// Create a subscription checkout session with Stripe
+	const checkoutSession = await stripeClient.checkout.sessions.create({
+		line_items: [
+			{
+				price: priceId,
+				quantity: 1
+			}
+		],
+		mode: 'subscription',
+		success_url: `${request.headers.get('origin')}/checkout/success`,
+		cancel_url: `${request.headers.get('origin')}/checkout/cancelled`,
+		metadata: {
+			userId: userId
+		}
+	});
+
+	// Store the checkout session.id for access from the frontend
+	cookies.set('checkout_session_id', checkoutSession.id, { path: '/' });
+	return redirect(303, checkoutSession.url as string);
+};

src/routes/products/[productId]/+page.svelte

@@ -44,6 +44,20 @@
 		}, 5000);
 	}
 
+	function startSubscription() {
+		fetch('/api/subscribe', {
+			method: 'POST',
+			headers: {
+				'Content-Type': 'application/json'
+			},
+			body: JSON.stringify({ priceId: item.priceId })
+		})
+			.then((response) => response.json())
+			.then((data) => {
+				console.log(data);
+			});
+	}
+
 	let item = {};
 
 	onMount(() => {
@@ -58,7 +72,8 @@
 					imgSrc: product.images[0],
 					price: 0,
 					priceId: product.default_price,
-					quantity: 1
+					quantity: 1,
+					isSubscription: product.isSubscription
 				};
 
 				// Fetch the price of the product
@@ -301,6 +316,7 @@
 						</div>
 					</div> -->
 
+					{#if !item.isSubscription}
 						<div class="grid grid-cols-1 sm:grid-cols-2 gap-3 py-8">
 							<div class="flex sm:items-center sm:justify-center w-full">
 								<button
@@ -392,8 +408,9 @@
 								Add to basket</button
 							>
 						</div>
+					{:else}
 						<div class="flex items-center gap-3">
-						<button
+							<!-- <button
 							class="group transition-all duration-500 p-4 rounded-full bg-indigo-50 hover:bg-indigo-100 hover:shadow-sm hover:shadow-indigo-300"
 						>
 							<svg
@@ -412,13 +429,15 @@
 									stroke-linejoin="round"
 								/>
 							</svg>
-						</button>
+						</button> -->
 							<button
 								class="text-center w-full px-5 py-4 rounded-[100px] bg-indigo-600 flex items-center justify-center font-semibold text-lg text-white shadow-sm transition-all duration-500 hover:bg-indigo-700 hover:shadow-indigo-400"
+								on:click={startSubscription}
 							>
-							Buy Now
+								Subscribe
 							</button>
 						</div>
+					{/if}
 				</div>
 			</div>
 		</div>

src/routes/products/[productId]/+server.ts

@@ -4,5 +4,10 @@ import { stripe as stripeClient } from '$lib/utils/stripe';
 export const GET = async ({ params }) => {
 	const { productId } = params;
 	const product = await stripeClient.products.retrieve(productId);
+
+	const price = await stripeClient.prices.retrieve(product.default_price);
+
+	const isSubscription = price.type === 'recurring';
+	product.isSubscription = isSubscription;
 	return json(product);
 };