package kindbox import ( "fmt" errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg" ) type Repository interface { ReceiverUserExist(id int) (bool, error) SenderUserExist(id int) (bool, error) } type Validator struct { repo Repository } func New(repo Repository) Validator { return Validator{repo: repo} } func (v Validator) doesReceiverUserExist(value interface{}) error { receiverId := value.(int) _, err := v.repo.ReceiverUserExist(receiverId) if err != nil { return fmt.Errorf(errmsg.ErrorMsgNotFound) } return nil } func (v Validator) doesSenderUserExist(value interface{}) error { senderId := value.(int) _, err := v.repo.SenderUserExist(senderId) if err != nil { return fmt.Errorf(errmsg.ErrorMsgNotFound) } return nil }