import fs, { Stats } from 'fs';

type Tester = (stats: Stats) => boolean;

const testStats = (p: string, tester: Tester): boolean => {
    if (!fs.existsSync(p)) return false;

    const stats = fs.statSync(p);
    return tester(stats);
};

/**
 * 判断路径是否为一个文件
 * @param {string} file
 * @returns {boolean}
 */
export const isFile = (file: string): boolean => testStats(file, (stats) => stats.isFile());

/**
 * 判断路径是否为一个文件夹
 * @param {string} folder
 * @returns {boolean}
 */
export const isFolder = (folder: string): boolean => testStats(folder, (stats) => stats.isDirectory());