package util

import (
	"encoding/json"
	"fmt"
	"net"
	"time"
)

//RandomStr 获取一个随机字符串
func RandomStr() string {
	return fmt.Sprintf("%d", time.Now().UnixNano())
}

// LocalIP 获取机器的IP
func LocalIP() string {
	info, _ := net.InterfaceAddrs()
	for _, addr := range info {
		ipNet, ok := addr.(*net.IPNet)
		if !ok {
			continue
		}
		if !ipNet.IP.IsLoopback() && ipNet.IP.To4() != nil {
			return ipNet.IP.String()
		}
	}
	return ""
}

func MapStringToStruct(m map[string]string, i interface{}) error {
	bin, err := json.Marshal(m)
	if err != nil {
		return err
	}
	err = json.Unmarshal(bin, i)
	if err != nil {
		return err
	}
	return nil
}