Checkout.ts

import type { CheckoutEndpoint } from '.'
import getCustomerId from '../../utils/get-customer-id'
import jwt from 'jsonwebtoken'
import { uuid } from 'uuidv4'
import { getShopTokenFromRequest } from '@lib/auth/utils'

const fullCheckout = true

const checkout: CheckoutEndpoint['handlers']['checkout'] = async ({ req, res, config }) => {
  const { cookies } = req
  const cartId = cookies[config.cartCookie]
  // YES!
  const customerToken = await getShopTokenFromRequest(req)
  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 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}`
    if (fullCheckout) {
      res.redirect(checkouturl)
      return
    }
  }
}

export default checkout