package main

type Option func(*User)

func WithEmail(email string) Option {
	return func(user *User) {
		user.Email = email
	}
}

func WithPhone(phone string) Option {
	return func(user *User) {
		user.Phone = phone
	}
}

func WithAddress(address string) Option {
	return func(user *User) {
		user.Address = address
	}
}

type User struct {
	Name    string
	Surname string
	Email   string
	Phone   string
	Address string
}

func NewUser(name string, surname string, options ...Option) User {
	user := User{
		Name:    name,
		Surname: surname,
	}

	for _, option := range options {
		option(&user)
	}

	return user
}

func main() {
	user1 := NewUser("Ivan", "Ivanov", WithEmail("ivanov@yandex.ru"))
	user2 := NewUser("Petr", "Petrov", WithEmail("petrov@yandex.ru"), WithPhone("+67453"))

	_ = user1
	_ = user2
}