package utils

import (
	"crypto/md5"
	"encoding/hex"
	"regexp"
	"strconv"
)

func MD5(data string) string {
	m := md5.Sum([]byte(data))
	return hex.EncodeToString(m[:])
}

func CheckPwd(pwd string) bool {
	compile := `([0-9a-z]+){6,12}|(a-z0-9]+){6,12}`
	reg := regexp.MustCompile(compile)
	flag := reg.MatchString(pwd)
	return flag
}

// 校验邮箱格式
func ValidateEmailFormatat(email string) bool {
	reg := regexp.MustCompile(RegularEmail)
	return reg.MatchString(email)
}

// 验证是否是手机号
func ValidateMobileFormatat(mobileNum string) bool {
	reg := regexp.MustCompile(RegularMobile)
	return reg.MatchString(mobileNum)
}

// 计算分页起始页
func StartIndex(page, pagesize int) int {
	if page > 1 {
		return (page - 1) * pagesize
	}
	return 0
}

// GetLikeKeywordPars 获取sql查询中的参数切片
func GetLikeKeywordPars(pars []interface{}, keyword string, num int) (newPars []interface{}) {
	newPars = pars
	if newPars == nil {
		newPars = make([]interface{}, 0)
	}
	for i := 1; i <= num; i++ {
		newPars = append(newPars, `%`+keyword+`%`)
	}
	return
}

func StringsToJSON(str string) string {
	rs := []rune(str)
	jsons := ""
	for _, r := range rs {
		rint := int(r)
		if rint < 128 {
			jsons += string(r)
		} else {
			jsons += "\\u" + strconv.FormatInt(int64(rint), 16) // json
		}
	}
	return jsons
}