iofs/index.js

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/**
*
* @authors yutent (yutent@doui.cc)
* @date 2015-12-28 14:28:38
*
*/
"use strict";
const fs = require('fs'),
path = require('path');
class Iofs {
constructor(){
this.self = fs
}
/**
* [cat 文件读取]
* @param {String} file [文件路径]
* @param {Function} cb [回调] 可选
*/
cat(file){
try{
return fs.readFileSync(file)
}catch(err){
console.error(err)
return null
}
}
/**
* [ls 读取整个目录(不遍历子目录)]
* @param {string} dir [目标路径]
* @param {boolean} child [是否遍历子目录]
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* @return {array} [返回目标目录所有文件名和子目录名, 不包括'.''..']
*/
ls(dir, child){
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try{
let list = fs.readdirSync(dir)
if(!child)
return list
let tmp = Array.from(list)
tmp.forEach(it => {
let childdir = path.join(dir, it)
if(this.isdir(childdir)){
list = Array.prototype.concat.apply(list, this.ls(childdir, true).map(sub => {
return path.join(it, sub)
}))
}
})
return list
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}catch(err){
console.error(err)
return null
}
}
/**
* [echo 写文件]
* @param {String|Buffer|Number} data [要写入的数据]
* @param {String} file [要写的文件]
* @param {Boolean} append [是否在后面追加默认否]
* @param {String} encode [编码, 默认utf8]
*/
echo(data, file, append, encode){
if(!file){
return data;
}
let updir = path.parse(file).dir,
opt = {};
if(!this.isdir(updir)){
this.mkdir(updir)
}
if(append && typeof append === 'string'){
encode = append;
append = false;
opt.encoding = encode;
}else{
if(typeof encode === 'string'){
opt.encoding = encode
}
}
try{
if(!!append){
fs.appendFileSync(file, data, opt)
}else{
fs.writeFileSync(file, data, opt)
}
}catch(err){
console.error(err)
}
}
//修改权限
chmod(path, mode){
try{
fs.chmodSync(path, mode)
}catch(err){
console.error(err)
}
}
/**
* [mv 移动文件,兼具重命名功能]
* @param {String} from [原路径/原名]
* @param {String} to [目标路径/新名]
*/
mv(from, to){
let updir = path.parse(to).dir
if(!this.isdir(updir))
this.mkdir(updir)
try{
fs.renameSync(from, to)
}catch(e){
let rs = fs.createReadStream(from),
ws = fs.createWriteStream(to);
rs.pipe(ws)
rs.on('end', err => {
this.rm(from)
})
}
}
cp(from, to){
let updir = path.parse(to).dir
if(!this.isdir(updir)){
this.mkdir(updir)
}
let rs = fs.createReadStream(from),
ws = fs.createWriteStream(to);
rs.pipe(ws)
rs.on('end', err => console.error(err))
}
/**
* [rm 删除文件/目录]
* @param {[type]} from [源文件/目录路径]
* @param {[type]} recursion [是否递归删除若删除目录此值须为true]
*/
rm(from, recursion){
try{
if(!!recursion){
fs.rmdirSync(from)
}else{
fs.unlinkSync(from)
}
}catch(err){
console.error(err)
}
}
/**
* [stat 返回文件/目录的状态信息]
* @param {[type]} path [目标路径]
*/
stat(path){
try{
return fs.statSync(path)
}catch(err){
return null
}
}
/**
* [isdir 判断目标是否为目录]
* @param {String} path [目标路径]
*/
isdir(path){
try{
return this.stat(path).isDirectory()
}catch(err){
return false
}
}
/**
* [mkdir 新建目录]
* @param {String} dir [目标路径]
*/
mkdir(dir){
let updir = path.parse(dir).dir
if(!updir)
return
if(!this.isdir(updir)){
this.mkdir(updir)
}
try{
fs.mkdirSync(dir)
}catch(err){
console.error(err)
}
}
/**
* [exists 判断目标(文件/目录)是否存在]
* @param {String} file [目标路径]
*/
exists(file){
return fs.existsSync(file)
}
}
module.exports = new Iofs