add separate booking state

db/booking.js

@@ -3,6 +3,8 @@ import * as mongoose from 'mongoose'
 
 import { getDays, dateFormatBackend } from '../helpers/date'
 
+import { BOOKING_STATUS } from './bookingStatus'
+
 const BookingSchema = new mongoose.Schema(
   {
     // need a seperate uuid to be able to target a booking anonimously
@@ -30,7 +32,7 @@ const BookingSchema = new mongoose.Schema(
     },
     status: {
       type: String,
-      enum: ['requested', 'confirmed', 'rejected'],
+      enum: Object.values(BOOKING_STATUS),
       required: true,
       default: 'requested',
     },