Next.js Commerce refresh. (#966)

We're making some updates to Next.js Commerce. Everything prior to this commit marks what we're calling [`v1`](https://github.com/vercel/commerce/releases/tag/v1) as a point in time to be able to reference and still use going into the future. The current architecture of Commerce is a multi-vendor, interoperable solution, including:

- [Shopify](https://shopify.vercel.store/)
- [Swell](https://swell.vercel.store/)
- [BigCommerce](https://bigcommerce.vercel.store/)
- [Vendure](https://vendure.vercel.store/)
- [Saleor](https://saleor.vercel.store/)
- [Ordercloud](https://ordercloud.vercel.store/)
- [Spree](https://spree.vercel.store/)
- [Kibo Commerce](https://kibocommerce.vercel.store/)
- [Commerce.js](https://commercejs.vercel.store/)
- [SalesForce Cloud Commerce](https://salesforce-cloud-commerce.vercel.store/)

All features can be toggled on or off, and it's easy to change between commerce providers. To support this, we needed to create a ["commerce metaframework"](d1d9e8c434/packages/commerce/new-provider.md) where providers could confirm to an API spec to add support for Next.js Commerce. While this worked and was successful for `v1`, we have different design goals and ambitions for `v2`.

**What You Need To Know**

- `v1` will not be updated moving forward. If you need to reference `v1`, you will still be able to clone and deploy the version tagged at this release.
- `v2` will be shifting to be a single provider vs. provider agnostic. Other providers are welcome to fork this repository and swap out the underlying `lib/` implementation that connects to the selected commerce provider (Shopify). This architecture was chosen to reduce the surface area of the codebase, remove the intermediate metaframework layer for provider-interoperability, and enable usage with the latest Next.js and React features.
- We will be sharing more about `v2` in the future as we continue to iterate before the marked release.

app/api/cart/route.ts

@@ -0,0 +1,75 @@
+import { cookies } from 'next/headers';
+import { NextRequest, NextResponse } from 'next/server';
+
+import { addToCart, removeFromCart, updateCart } from 'lib/shopify';
+import { isShopifyError } from 'lib/type-guards';
+
+function formatErrorMessage(err: Error): string {
+  return JSON.stringify(err, Object.getOwnPropertyNames(err));
+}
+
+export async function POST(req: NextRequest): Promise<Response> {
+  const cartId = cookies().get('cartId')?.value;
+  const { merchandiseId } = await req.json();
+
+  if (!cartId?.length || !merchandiseId?.length) {
+    return NextResponse.json({ error: 'Missing cartId or variantId' }, { status: 400 });
+  }
+  try {
+    await addToCart(cartId, [{ merchandiseId, quantity: 1 }]);
+    return NextResponse.json({ status: 204 });
+  } catch (e) {
+    if (isShopifyError(e)) {
+      return NextResponse.json({ message: formatErrorMessage(e.message) }, { status: e.status });
+    }
+
+    return NextResponse.json({ status: 500 });
+  }
+}
+
+export async function PUT(req: NextRequest): Promise<Response> {
+  const cartId = cookies().get('cartId')?.value;
+  const { variantId, quantity, lineId } = await req.json();
+
+  if (!cartId || !variantId || !quantity || !lineId) {
+    return NextResponse.json(
+      { error: 'Missing cartId, variantId, lineId, or quantity' },
+      { status: 400 }
+    );
+  }
+  try {
+    await updateCart(cartId, [
+      {
+        id: lineId,
+        merchandiseId: variantId,
+        quantity
+      }
+    ]);
+    return NextResponse.json({ status: 204 });
+  } catch (e) {
+    if (isShopifyError(e)) {
+      return NextResponse.json({ message: formatErrorMessage(e.message) }, { status: e.status });
+    }
+
+    return NextResponse.json({ status: 500 });
+  }
+}
+
+export async function DELETE(req: NextRequest): Promise<Response> {
+  const cartId = cookies().get('cartId')?.value;
+  const { lineId } = await req.json();
+
+  if (!cartId || !lineId) {
+    return NextResponse.json({ error: 'Missing cartId or lineId' }, { status: 400 });
+  }
+  try {
+    await removeFromCart(cartId, [lineId]);
+    return NextResponse.json({ status: 204 });
+  } catch (e) {
+    if (isShopifyError(e)) {
+      return NextResponse.json({ message: formatErrorMessage(e.message) }, { status: e.status });
+    }
+
+    return NextResponse.json({ status: 500 });
+  }
+}

app/api/og/route.tsx

@@ -0,0 +1,66 @@
+import { ImageResponse } from '@vercel/og';
+import { SITE_NAME } from 'lib/constants';
+import { NextRequest } from 'next/server';
+
+export const runtime = 'edge';
+
+const interRegular = fetch(new URL('./Inter-Regular.ttf', import.meta.url)).then((res) =>
+  res.arrayBuffer()
+);
+
+const interBold = fetch(new URL('./Inter-Bold.ttf', import.meta.url)).then((res) =>
+  res.arrayBuffer()
+);
+
+export async function GET(req: NextRequest): Promise<Response | ImageResponse> {
+  try {
+    const [regularFont, boldFont] = await Promise.all([interRegular, interBold]);
+
+    const { searchParams } = new URL(req.url);
+
+    const title = searchParams.has('title') ? searchParams.get('title')?.slice(0, 100) : SITE_NAME;
+
+    return new ImageResponse(
+      (
+        <div tw="flex h-full w-full flex-col items-center justify-center bg-black">
+          <svg viewBox="0 0 32 32" width="140">
+            <rect width="100%" height="100%" rx="16" fill="white" />
+            <path
+              fillRule="evenodd"
+              clipRule="evenodd"
+              fill="black"
+              d="M17.6482 10.1305L15.8785 7.02583L7.02979 22.5499H10.5278L17.6482 10.1305ZM19.8798 14.0457L18.11 17.1983L19.394 19.4511H16.8453L15.1056 22.5499H24.7272L19.8798 14.0457Z"
+            />
+          </svg>
+
+          <div tw="mt-12 text-6xl text-white font-bold">{title}</div>
+        </div>
+      ),
+      {
+        width: 1200,
+        height: 630,
+        fonts: [
+          {
+            name: 'Inter',
+            data: regularFont,
+            style: 'normal',
+            weight: 400
+          },
+          {
+            name: 'Inter',
+            data: boldFont,
+            style: 'normal',
+            weight: 700
+          }
+        ]
+      }
+    );
+  } catch (e) {
+    if (!(e instanceof Error)) throw e;
+
+    console.log(e.message);
+    return new Response(`Failed to generate the image`, {
+      status: 500
+    });
+  }
+}