add patch for bookings and only allow status

pages/api/booking/[uuid].js

@@ -1,4 +1,5 @@
-import { getBookingByUUID, createBooking } from '../../../db/index'
+import { getBookingByUUID, getBookingByUUIDAsJSON } from '../../../db/index'
+import { BOOKING_STATUS } from '../../../db/bookingStatus'
 
 export default async function userHandler(req, res) {
   const {
@@ -10,9 +11,41 @@ export default async function userHandler(req, res) {
 
   switch (method) {
     case 'GET':
-      booking = await getBookingByUUID(uuid)
+      booking = await getBookingByUUIDAsJSON(uuid)
       res.status(200).json(booking)
       break
+    case 'PATCH':
+      booking = await getBookingByUUID(uuid)
+      const readonlyProps = Object.keys(req.body).filter(
+        (key) => key !== 'status'
+      )
+
+      if (readonlyProps.length) {
+        res
+          .status(400)
+          .end(
+            `The following attributes cannot be changed: ${readonlyProps.join(
+              ', '
+            )}`
+          )
+        break
+      }
+
+      if (!Object.values(BOOKING_STATUS).includes(req.body.status)) {
+        res
+          .status(400)
+          .end(
+            `The attribute status can only be: ${Object.values(
+              BOOKING_STATUS
+            ).join(', ')}`
+          )
+        break
+      }
+
+      booking.status = req.body.status
+      await booking.save()
+      res.status(200).json(booking.toJSON())
+      break
     default:
       res.setHeader('Allow', ['POST'])
       res.status(405).end(`Method ${method} Not Allowed`)