uni_android_plugin_project/uniappWWW/unipluginDemo/utils/8inFileOperate.js

import downloadImg from "./download.js"

/*
fileName: 需要查询的目录名
*/
async function getFileChildrenList(fileName){
	let fs = await downloadImg.requestFileSystem(plus.io.PUBLIC_DOWNLOADS); //获取所要操作根目录File System
	let faceSyncEntry = await downloadImg.getDirectory({
		//在PUBLIC_DOWNLOADS下定义人脸库同步文件夹"Face-Sync" Success-Import
		OriginPathEntry: fs.root,
		newFileName: fileName
	});
	return downloadImg.getFileChildrenList(faceSyncEntry).then((res)=>{
		return res
	}).catch((e)=>{
		console.log("获取文件列表失败:",e)
	})
}
/*
fileName: 需要删除的文件名
*/
async function deleteAndroidFaceImage(fileName){
	let item = {
		"deleteFile" : true,
		"name": fileName
	}
	let fs = await downloadImg.requestFileSystem(plus.io.PUBLIC_DOWNLOADS); //获取所要操作根目录File System
	let url = item.url; //测试url---------
	let newName = item.name;
	let faceSyncEntry = await downloadImg.getDirectory({
		//在PUBLIC_DOWNLOADS下定义人脸库同步文件夹"Face-Sync" Success-Import
		OriginPathEntry: fs.root,
		newFileName: 'Face-Sync'
	});
	let newNameFileEntry = await downloadImg.resolveLocalFileSystemURL(faceSyncEntry.fullPath + newName).catch(e => {
		console.log('目标文件可以操作', e);
	});
	if (newNameFileEntry) {
		console.log('存在缓存的同名文件:', newNameFileEntry.fullPath);
		
		if(item.deleteFile){
			let delResult = await downloadImg.removeFile(newNameFileEntry); //删除已存在的文件
			console.log("删除同名文件结果:",delResult)
			return delResult
		}
		if(item.forceDownload){//当本地存在缓存时,是否强制删除后重新下载
			let delResult = await downloadImg.removeFile(newNameFileEntry); //删除已存在的文件
		}else{
			return newNameFileEntry.fullPath  //返回已缓存文件路径
		}
	
	}else{
		console.log("不存在同名文件:"+fileName)
	}
}

/*
直接处理接口数据,下载列表并返回下载结果
并同时处理request_time,检测确保当完成列表下载后,本地再存储request_time
*/
async function downloadFileList(res){
	// await asyncSetTimeOut(3000) //延时,手动断网,模拟下载失败
	return new Promise(async(rs,rj)=>{
		let {list,request_time,total} = res
		console.log(request_time,total);
		let downloadSuccessList = []
		for (var i=0; i < list.length; i++) {
			try{
				await checkNetworkUsable()
				console.log("当前第"+(i+1)+"张, 总需下载:"+(list.length))
				let local_path = await downloadFileImg(list[i])
				downloadSuccessList.push(local_path);
				list[i]['local_path'] = local_path
			}catch(e){
				//TODO handle the exception
				// util.showNone(e)
				console.error("下载失败:",e);
				list[i]['error'] = e
				continue
			}
		}
		res.list = list
		checkRequestTime(res)
		rs(list)
	})
}
/*检测下载完成后列表,全部下载完成时,设置下载时间到本地
*/
function checkRequestTime(res){
	if(res.list.every(e=>e.local_path)){
		setRequestTime(res)
	}
}
/*传入downloadFileList 结果,返回plugin要求的成功图片user_id拼接string
如: 15,17
*/
function getDataForPlugin(list){
	return list.map(e=>{
		if(e.local_path)return e.user_id
	}).join(",")
}
/*检测当前网络是否可用
*/
function checkNetworkUsable(){
	return new Promise((rs,rj)=>{
		uni.getNetworkType({
		    success: function (res) {
		        console.log("checkNetworkUsable 当前可用网络:",res.networkType);
				rs(true)
		    },
			fail: function (err) {
			    console.log(err);
				rj(false)
			}
		});
	})
}
/*存储请求时间到本地
后台约定,人脸更新机制为带时间请求
*/
function setRequestTime(res){
	if(res.request_time){
		uni.setStorageSync("request_time",res.request_time)
	}
}
/*返回请求时间戳
*/
function getRequestTime(){ 
	return new Promise((rs,rj)=>{
		let _time = ""
		try{
			 _time = uni.getStorageSync("request_time")
		}catch(e){
			console.warn("请求时间戳异常:",e);
		}
		rs(_time)
	})
}

async function asyncSetTimeOut(time){
	const res = await new Promise(resolve => {
	        setTimeout(() => resolve("asyncSetTimeOut"), time||1000);
	});
	return res
}

/*
//下载文件,转存后,按user_id重命名,并返回最终文件本地路径.
//当有重复文件时,覆盖
item:{
	pic_url:"",user_id:"",update_time:""
}
*/
async function downloadFileImg(item) {
	let fs = await downloadImg.requestFileSystem(plus.io.PUBLIC_DOWNLOADS); //获取所要操作根目录File System
	let url = item.pic_url; //测试url---------
	let onProgresCallBack = function(e) {
		//预留下载进度封装拓展
		console.log('下载中...user_id:'+item.user_id, e);
	};
	let tempDownloadFilePath = await downloadImg.getDownloadFile({
		url,
		onProgresCallBack
	}); //获取下载文件临时路径
	let savedFilePath = await downloadImg.getSaveFile(tempDownloadFilePath); //将文件临时路径长久存储并清除
	let newName = item.user_id + '.' + (savedFilePath.split('.')[1] ||
	'jpg'); //命名与android约定的文件名: [user_id].jpg------------
	newName = item.user_id + getName(url);
	// console.log(tempDownloadFilePath, savedFilePath.split('.')[1], savedFilePath);
	let savedFilePathEntry = await downloadImg.resolveLocalFileSystemURL(savedFilePath); //获取下载后存储的文件Entry
	let faceSyncEntry = await downloadImg.getDirectory({
		//在PUBLIC_DOWNLOADS下定义人脸库同步文件夹"Face-Sync"
		OriginPathEntry: fs.root,
		newFileName: 'Face-Sync'
	});
	let newNameFileEntry = await downloadImg.resolveLocalFileSystemURL(faceSyncEntry.fullPath + newName).catch(
	e => {
		console.log('目标文件可以操作', e);
	});
	if (newNameFileEntry) {
		console.log('删除存在的同名文件:', newNameFileEntry.fullPath);
		let delResult = await downloadImg.removeFile(newNameFileEntry); //删除已存在的文件

	}
	let reNamePathEntry = await downloadImg.moveFileTo(savedFilePathEntry, faceSyncEntry, newName); //重命名文件到人脸库同步文件夹
	// console.log(savedFilePath,newName,reNamePathEntry.fullPath)
	return reNamePathEntry.fullPath;
}

function getName(url) {
	let end = '.';
	let urlarr = url.split('.');
	let endname = urlarr[urlarr.length];
	if (endname != 'jpg' || endname != 'png' || endname != 'jpeg' || endname != 'PNG' || endname != 'JPG' || endname != 'JPEG') endname = 'jpg';
	return (end += endname);
}

//递归清空本地同步文件目录及子目录
async function clearDownloadFace(fileName){
	let fs = await downloadImg.requestFileSystem(plus.io.PUBLIC_DOWNLOADS); //获取所要操作根目录File System
	
	let faceSyncEntry = await downloadImg.getDirectory({
		//在PUBLIC_DOWNLOADS下定义人脸库同步文件夹[fileName]
		OriginPathEntry: fs.root,
		newFileName: fileName
	});
	let newNameFileEntry = await downloadImg.resolveLocalFileSystemURL(faceSyncEntry.fullPath).catch(
	e => {
		console.log('操作目标文件', e);
	});
	await downloadImg.removeFileAll(newNameFileEntry).then(e=>{
		console.log(fileName,"删除:",e);
	})
}
module.exports = {
	downloadFileImg,
	clearDownloadFace,
	downloadFileList,
	getRequestTime,
	getDataForPlugin,
	asyncSetTimeOut,
	deleteAndroidFaceImage,
	getFileChildrenList
}