package util

import (
	"math/rand"
	"strconv"
	"time"
)

func StringToInt(id string) int {
	if id != "" {
		id, err := strconv.Atoi(id)
		if err == nil {
			return id
		}
	}
	return -1
}

func RandomString(n int) string {
	var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
	rand.Seed(time.Now().Unix())
	b := make([]rune, n)
	for i := range b {
		b[i] = letters[rand.Intn(len(letters))]
	}
	return string(b)
}

func RandomString2(n int) string {
	var letters = []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
	rand.Seed(time.Now().Unix())
	b := make([]rune, n)
	for i := range b {
		b[i] = letters[rand.Intn(len(letters))]
	}
	return string(b)
}