package validator

import "encoding/json"

// NullInt32 Valid(false) + Set(true) = null | Valid(false) + Set(false) = nil
type NullInt32 struct {
	Value int32
	Valid bool
	Set   bool
}

func (i *NullInt32) UnmarshalJSON(data []byte) error {
	i.Set = true

	if string(data) == "null" {
		i.Valid = false
		return nil
	}

	var temp int32
	if err := json.Unmarshal(data, &temp); err != nil {
		return err
	}

	i.Value = temp
	i.Valid = true
	return nil
}