Handle checkout for logged in users (#405)

* create a jwt token if there is a customerId, move the get customer id to the main utils folder.  Need to add in more value to the env file.  Updated the env sample.

* remove yarn.lock and tsconfig.json

* remove build settings

* remove build settings

* remove build settings

* Update tsconfig.json

* Delete package-lock.json

* fix typescript errors

* Update tsconfig.json

Co-authored-by: George Fitzgibbons <george.fitzgibbons@c02zw1aqlvdn.lan>

framework/bigcommerce/api/endpoints/checkout/checkout.ts

@@ -1,4 +1,7 @@
 import type { CheckoutEndpoint } from '.'
+import getCustomerId from '../../utils/get-customer-id'
+import jwt from 'jsonwebtoken'
+import { uuid } from 'uuidv4'
 
 const fullCheckout = true
 
@@ -9,22 +12,47 @@ const checkout: CheckoutEndpoint['handlers']['checkout'] = async ({
 }) => {
   const { cookies } = req
   const cartId = cookies[config.cartCookie]
-
+  const customerToken = cookies[config.customerCookie]
   if (!cartId) {
     res.redirect('/cart')
     return
   }
-
   const { data } = await config.storeApiFetch(
     `/v3/carts/${cartId}/redirect_urls`,
     {
       method: 'POST',
     }
   )
+  const customerId =
+    customerToken && (await getCustomerId({ customerToken, config }))
 
-  if (fullCheckout) {
-    res.redirect(data.checkout_url)
-    return
+  //if there is a customer create a jwt token
+  if (!customerId) {
+    if (fullCheckout) {
+      res.redirect(data.checkout_url)
+      return
+    }
+  } else {
+    const dateCreated = Math.round(new Date().getTime() / 1000)
+    const payload = {
+      iss: config.storeApiClientId,
+      iat: dateCreated,
+      jti: uuid(),
+      operation: 'customer_login',
+      store_hash: config.storeHash,
+      customer_id: customerId,
+      channel_id: config.storeChannelId,
+      redirect_to: data.checkout_url,
+    }
+    let token = jwt.sign(payload, config.storeApiClientSecret!, {
+      algorithm: 'HS256',
+    })
+    let checkouturl = `${config.storeUrl}/login/token/${token}`
+    console.log('checkouturl', checkouturl)
+    if (fullCheckout) {
+      res.redirect(checkouturl)
+      return
+    }
   }
 
   // TODO: make the embedded checkout work too!