package wechat

import (
	"crypto/md5"
	"encoding/hex"
	"net"
	"strings"
)

// 密码加密
func Md5Str(str ...string) string {

	var build strings.Builder
	if len(str) > 0 {
		for _, v := range str {
			build.WriteString(v)
		}
	} else {
		return ""
	}

	h := md5.New()
	h.Write([]byte(build.String())) // 需要加密的字符串
	cipher2Str := h.Sum(nil)
	sMd5 := hex.EncodeToString(cipher2Str) // 输出加密结果
	return sMd5
}

/**
 * 取本地IP
 */
func GetLocalIp() string {

	addrs, err := net.InterfaceAddrs()

	if err != nil {
		return ""
	}

	for _, address := range addrs {

		// 检查ip地址判断是否回环地址
		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil && !ipnet.IP.IsLinkLocalUnicast() {
				return ipnet.IP.String()
			}
		}
	}

	return ""
}