package util

import (
    "io"
    "math/rand"
    "os"

    //   "strings"
)


func RandomString(n int) string {
    var letter = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")

    b := make([]rune, n)
    for i := range b {
        b[i] = letter[rand.Intn(len(letter))]
    }
    return string(b)
}


func CopyFile(source string, dest string) error {
    sourceFD, err := os.Open(source)
    if err != nil {
        return err
    }

    finfo, err := sourceFD.Stat()

    destFD, err := os.OpenFile(dest, os.O_RDWR|os.O_CREATE, finfo.Mode())
    if err != nil {
        return err
    }

    _, err = io.Copy(destFD, sourceFD)
    if err != nil {
        return err
    }
    sourceFD.Close()
    destFD.Close()

    return nil
}