package fs

import (
	"os"
)

// IsDir Tells whether the filename is a directory
func IsDir(filename string) (bool, error) {
	fd, err := os.Stat(filename)
	if err != nil {
		return false, err
	}
	return fd.Mode().IsDir(), nil
}

// IsFile Tells whether the filename is a file
func IsFile(filename string) (bool, error) {
	fd, err := os.Stat(filename)
	if err != nil {
		return false, err
	}
	return !fd.Mode().IsDir(), nil
}

// Mkdir checking directory, is not exists will create
func Mkdir(dirname string, perm os.FileMode) error {
	if fi, err := os.Stat(dirname); err != nil {
		return os.MkdirAll(dirname, perm)
	} else {
		if fi.IsDir() {
			return nil
		}
		return os.ErrPermission
	}
}