package utils

import (
	"crypto/md5"
	"encoding/hex"
	"io"
	"os"
)

// FileMd5 calculates the md5 of a file
func FileMd5(file string) (string, error) {
	f, err := os.Open(file)
	if err != nil {
		return "", err
	}

	h := md5.New()
	if _, err := io.Copy(h, f); err != nil {
		return "", err
	}
	return hex.EncodeToString(h.Sum(nil)), nil
}

func StringMd5(s string) string {
	h := md5.New()
	h.Write([]byte(s))
	return hex.EncodeToString(h.Sum(nil))
}