Add ordercloud provider (#500)

* Add ordercloud provider

* Fix provider errors

* Make submit checkout optional

* Make submit checkout optional

* Remove nullables when creating endpoint type

* Update readme

* Log checkout error

* Log error

* Save token to cookie

* Update fetch rest

* Use token at checkout

Co-authored-by: Luis Alvarez <luis@vercel.com>

framework/ordercloud/api/endpoints/cart/update-item.ts

@@ -0,0 +1,63 @@
+import type { OrdercloudLineItem } from '../../../types/cart'
+import type { RawVariant } from '../../../types/product'
+import type { CartEndpoint } from '.'
+
+import { formatCart } from '../../utils/cart'
+
+const updateItem: CartEndpoint['handlers']['updateItem'] = async ({
+  req,
+  res,
+  body: { cartId, itemId, item },
+  config: { restBuyerFetch, tokenCookie },
+}) => {
+  if (!cartId || !itemId || !item) {
+    return res.status(400).json({
+      data: null,
+      errors: [{ message: 'Invalid request' }],
+    })
+  }
+
+  // Get token from cookies
+  const token = req.cookies[tokenCookie]
+
+  // Store specs
+  let specs: RawVariant['Specs'] = []
+
+  // If a variant is present, fetch its specs
+  if (item.variantId) {
+    specs = await restBuyerFetch(
+      'GET',
+      `/me/products/${item.productId}/variants/${item.variantId}`,
+      null,
+      { token }
+    ).then((res: RawVariant) => res.Specs)
+  }
+
+  // Add the item to the order
+  await restBuyerFetch(
+    'PATCH',
+    `/orders/Outgoing/${cartId}/lineitems/${itemId}`,
+    {
+      ProductID: item.productId,
+      Quantity: item.quantity,
+      Specs: specs,
+    },
+    { token }
+  )
+
+  // Get cart
+  const [cart, lineItems] = await Promise.all([
+    restBuyerFetch('GET', `/orders/Outgoing/${cartId}`, null, { token }),
+    restBuyerFetch('GET', `/orders/Outgoing/${cartId}/lineitems`, null, {
+      token,
+    }).then((response: { Items: OrdercloudLineItem[] }) => response.Items),
+  ])
+
+  // Format cart
+  const formattedCart = formatCart(cart, lineItems)
+
+  // Return cart and errors
+  res.status(200).json({ data: formattedCart, errors: [] })
+}
+
+export default updateItem