/**
 * 读取一个目录中所有子目录和文件
 */
 const fs = require('fs')
 const path = require('path')
 
 class File {
     constructor(filename, name, ext, isFile, size, creeateTime, updateTime) {
         this.filename = filename
         this.name = name // 文件名
         this.ext = ext // 后缀
         this.isFile = isFile // 是否文件
         this.size = size // 文件大小
         this.creeateTime = creeateTime // 创建时间
         this.updateTime = updateTime // 更新时间
     }
 
     static async getFile(filename) {
         const stat = await fs.promises.stat(filename)
         const { size, birthtime, mtime } = stat
         let name = path.basename(filename),
             ext = path.extname(filename),
             isFile = stat.isFile(),
             creeateTime = new Date(birthtime),
             updateTime = new Date(mtime);
         return new File(filename, name, ext, isFile, size, creeateTime, updateTime)
     }
 
     // 获取目录的所有子文件对象，如果是文件返回空数组
     async getChildren() {
         if (this.isFile) { return [] }
         let dirArr = await fs.promises.readdir(this.filename);
         dirArr = dirArr.map(fileName => {
             const filename = path.resolve(this.filename, fileName)
             return File.getFile(filename)
         })
         return Promise.all(dirArr)
     }
 
     // 获取文件内容， 如果是目录，返回null
     async getContent(isBuffer = false) {
         if (!this.isFile) { return null }
         if (isBuffer) {
             return await fs.promises.readFile(this.filename)
         }
         return await fs.promises.readFile(this.filename, 'utf-8')
     }
 }
 
 async function readDir(dirname) {
     const file = await File.getFile(dirname)
     return await file.getChildren()
 }
 
 const dirname = path.resolve(__dirname, '../src')
 console.log(readDir(dirname))
 
 async function test() {
     const dirname = path.resolve(__dirname, '../src')
     const filename = path.resolve(__dirname, './index.js')
 
     const dir = await File.getFile(dirname)
     console.log('dir', await dir.getChildren())
 
     const file = await File.getFile(filename)
     console.log('file', file)
 
 }
 test()