//UpdateBooking takes a booking with updated values and replace the one in db. Returns an id to confirm what booking was updated and an error
func (s *BookingService) UpdateBooking(b *bookit.Booking) error {
// TODO: Create UpdateBooking service function
tx, err := s.client.db.Begin(true)
if err != nil {
//fix error handling
log.Fatal(err)
}
defer tx.Rollback()
var bk bookit.Booking
//Get db bucket
bu := tx.Bucket([]byte("Bookings"))
//Fetch booking, key is ID
v := bu.Get([]byte(b.ID))
if v == nil {
return bookit.ErrBookingNotFound
} else if err := internal.UnmarshalBooking(v, &bk); err != nil {
//check for unmarshalling error
return bookit.ErrBookingUnmarshal
}
b1 := reflect.ValueOf(b)
b2 := reflect.ValueOf(&bk)
fmt.Println(b1)
fmt.Println(b2)
//Compare if any change was done from what is stored in database
if b1 == b2 {
return bookit.ErrBookingNoChange
}
//We check if bookings are different above, since bookings were different, we now update Modified time in the new booking
t := s.client.Now()
b.ModTime = t
//After modified time is update, we put new booking back in bucket
//Marshal protobuf and add to bolt db
if v, err := internal.MarshalBooking(b); err != nil {
return err
} else if err := bu.Put([]byte(b.ID), v); err != nil {
return err
}
return tx.Commit()
}
//CreateBooking - creates a new booking and saves to bookings bucket
func (s *BookingService) CreateBooking(b *bookit.Booking) error {
//Most likely unecessary since we generate Id prior to this method call
if b.ID == "" {
return bookit.ErrBookingIDRequired
}
//start writing to database
tx, err := s.client.db.Begin(true)
if err != nil {
return err
}
defer tx.Rollback()
//Check that booking do not exist
//Should not happen since each booking got unique id
//TODO: Evaluate if’’ below check is needed
bu := tx.Bucket([]byte("Bookings"))
if v := bu.Get([]byte(b.ID)); v != nil {
return bookit.ErrBookingExists
}
//Set create and modified time
t := s.client.Now()
b.ModTime = t
b.CreateTime = t
//Marshal protobuf and add to bolt db
if v, err := internal.MarshalBooking(b); err != nil {
return err
} else if err := bu.Put([]byte(b.ID), v); err != nil {
return err
}
return tx.Commit()
}