also get booked days from calendar

db/booking.ts

@@ -5,7 +5,6 @@ import { createCalendarEvent, deleteCalendarEvent } from '../lib/googlecalendar'
 
 import { Bill } from './bill'
 import { BOOKING_STATUS, VALIDATION_ERRORS } from './enums'
-import { getBookedDays } from './index'
 
 export type Booking = {
   uuid: string
@@ -76,7 +75,7 @@ const BookingSchema = new mongoose.Schema<BookingDocument>(
         validator: async function (days: string[]): Promise<boolean> {
           const booking = this as Booking
           const uuid = booking.uuid && [booking.uuid]
-          const bookedDays = await getBookedDays(uuid)
+          const bookedDays = await BookingModel.findBookedDays(uuid)
 
           const doubleBookedDays = days.filter((day: string): boolean =>
             bookedDays.includes(day)
@@ -155,8 +154,10 @@ BookingSchema.static(
   }
 )
 
-export default (mongoose.models.Booking ||
+const BookingModel = (mongoose.models.Booking ||
   mongoose.model<BookingDocument, BookingModel>(
     'Booking',
     BookingSchema
   )) as BookingModel
+
+export default BookingModel;

db/index.ts

@@ -1,7 +1,9 @@
 import * as mongoose from 'mongoose'
 import BookingModel, { Booking, BookingDocument } from './booking'
 import BillModel, { Bill } from './bill'
+import { getBookedDays as calendarGetBookedDays } from '../lib/googlecalendar'
 import { BOOKING_STATUS } from './enums'
+import { uniqueFilter } from '../helpers/array'
 
 let connectedPromise: Promise<mongoose.Mongoose>
 
@@ -21,7 +23,12 @@ export async function getBookedDays(
   uuidsToIngore?: string[]
 ): Promise<string[]> {
   await connect()
-  return BookingModel.findBookedDays(uuidsToIngore)
+  const bookedInDatabase = await BookingModel.findBookedDays(uuidsToIngore);
+  const bookedInCalendar = await calendarGetBookedDays();
+
+  return [ ...bookedInDatabase, ...bookedInCalendar]
+     .filter(uniqueFilter)
+     .sort();
 }
 
 export async function getBookingByUUID(uuid: string): Promise<BookingDocument> {