Go validation

validation.go

package main

import (
	"fmt"
)

type Validation struct {
	Error string
	OK bool
}

func (v Validation) Message(message string) string {
	if v.OK == false {
		return message
	}
	return ""
}

func (v Validation) MinSize(who string, size int) Validation {
	if len(who) < size {
		return Validation{OK: false}
	}
	return Validation{OK: true}
}

func (v Validation) MaxSize(who string, size int) Validation {
	if len(who) > size {
		return Validation{OK: false}
	}
	return Validation{OK: true}
}

func main() {
	v := Validation{}
	fmt.Println(v.MinSize("Daniel", 10).Message("Valor é muito pequeno"))
	fmt.Println(v.MaxSize("Daniel", 10).Message("Valor é muito grande"))
}