package util

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

const alphabet = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

func init() {
	rand.Seed(time.Now().UnixNano())
}

func GenerateRandomString(n int) string {
	b := make([]byte, n)

	for i := range b {
		b[i] = alphabet[rand.Intn(len(alphabet))]
	}

	return string(b)
}

func IsWhitespaceFree(s string) bool {
	for _, r := range s {
		if unicode.IsSpace(r) {
			return false
		}
	}

	return true
}