package optional

import (
	"encoding/json"
)

func (o *Optional[T]) UnmarshalJSON(data []byte) error {
	var Buffer *T

	err := json.Unmarshal(data, &Buffer)
	if err != nil {
		return err
	}

	if Buffer == nil {
		var empty T
		o.Value = empty
		o.Exists = false
		return nil
	}

	o.Value = *Buffer
	o.Exists = true
	return nil
}

func (o Optional[T]) MarshalJSON() ([]byte, error) {
	var Buffer *T

	if o.Exists {
		Buffer = &o.Value
	}

	return json.Marshal(Buffer)
}