package util

import (
	"regexp"

	"github.com/go-playground/validator/v10"
)

var Validator *validator.Validate

func init() {
	Validator = validator.New(validator.WithRequiredStructEnabled())
	_ = Validator.RegisterValidation("validregexp", isValidRegExp)
}

func isValidRegExp(fl validator.FieldLevel) bool {
	expr := fl.Field().String()
	if expr == "" {
		return true
	}
	_, err := regexp.Compile(expr)
	return err == nil
}