// +----------------------------------------------------------------------
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// | CRMEB [ CRMEB赋能开发者，助力企业发展 ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2016~2021 https://www.crmeb.com All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed CRMEB并不是自由软件，未经许可不能去掉CRMEB相关版权
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// +----------------------------------------------------------------------
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// | Author: CRMEB Team <admin@crmeb.com>
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// +----------------------------------------------------------------------
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import { EXPIRE } from '../config/app';
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class Cache {
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constructor(handler) {
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this.cacheSetHandler = uni.setStorageSync;
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this.cacheGetHandler = uni.getStorageSync;
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this.cacheClearHandler = uni.removeStorageSync;
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this.cacheExpire = '_expire_2019_12_17_18_44';
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this.name = 'storage';
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}
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/**
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* 获取当前时间戳
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*/
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time()
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{
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return Math.round(new Date() / 1000);
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}
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/**
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* 日期字符串转时间戳
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* @param {Object} expiresTime
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*/
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strTotime(expiresTime){
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let expires_time = expiresTime.substring(0, 19);
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expires_time = expires_time.replace(/-/g, '/');
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return Math.round(new Date(expires_time).getTime() / 1000);
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}
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setExpireCaheTag(key, expire) {
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expire = expire !== undefined ? expire : EXPIRE;
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if (typeof expire === 'number') {
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let tag = this.cacheGetHandler(this.cacheExpire), newTag = [],newKeys = [];
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if (typeof tag === 'object' && tag.length) {
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newTag = tag.map(item => {
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newKeys.push(item.key);
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if (item.key === key) {
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item.expire = expire === 0 ? 0 : this.time() + expire;
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}
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return item;
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});
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}
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if (!newKeys.length || newKeys.indexOf(key) === -1) {
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newTag.push({
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key: key,
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expire: expire === 0 ? 0 : this.time() + expire
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});
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}
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this.cacheSetHandler(this.cacheExpire, newTag);
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}
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}
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/**
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* 设置过期时间缓存
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* @param {Object} name key
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* @param {Object} value value
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* @param {Object} expire 过期时间
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* @param {Object} startTime 记录何时将值存入缓存，毫秒级
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*/
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setItem(params){
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let obj = {
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name:'',
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value:'',
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expires:"",
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startTime:new Date().getTime()
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}
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let options = {};
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//将obj和传进来的params合并
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Object.assign(options,obj,params);
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if(options.expires){
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//如果options.expires设置了的话
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//以options.name为key，options为值放进去
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// localStorage.setItem(options.name,JSON.stringify(options));
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uni.setStorageSync(options.name,JSON.stringify(options));
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}else{
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//如果options.expires没有设置，就判断一下value的类型
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let type = Object.prototype.toString.call(options.value);
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//如果value是对象或者数组对象的类型，就先用JSON.stringify转一下，再存进去
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if(Object.prototype.toString.call(options.value) == '[object Object]'){
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options.value = JSON.stringify(options.value);
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}
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if(Object.prototype.toString.call(options.value) == '[object Array]'){
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options.value = JSON.stringify(options.value);
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}
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// localStorage.setItem(options.name,options.value);
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uni.setStorageSync(options.name,options.value);
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}
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}
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/**
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* 缓存是否过期,过期自动删除
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* @param {Object} key
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* @param {Object} $bool true = 删除,false = 不删除
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*/
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getExpireCahe(key,$bool)
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{
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try{
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let time = this.cacheGetHandler(key + this.cacheExpire);
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if (time) {
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let newTime = parseInt(time);
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if (time && time < this.time() && !Number.isNaN(newTime)) {
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if ($bool === undefined || $bool === true) {
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this.cacheClearHandler(key);
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this.cacheClearHandler(key + this.cacheExpire);
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}
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return false;
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} else
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return true;
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} else {
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return !!this.cacheGetHandler(key);
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}
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}catch(e){
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return false;
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}
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}
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/**
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* 设置缓存
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* @param {Object} key
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* @param {Object} data
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*/
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set(key,data,expire){
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if(typeof data === 'object')
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data = JSON.stringify(data);
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try{
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this.setExpireCaheTag(key,expire);
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return this.cacheSetHandler(key,data);
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}catch(e){
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return false;
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}
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}
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/**
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* 检测缓存是否存在
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* @param {Object} key
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*/
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has(key)
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{
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return this.getExpireCahe(key);
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}
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/**
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* 获取缓存
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* @param {Object} key
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* @param {Object} $default
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* @param {Object} expire
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*/
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get(key,$default,expire){
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try{
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let isBe = this.getExpireCahe(key);
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let data = this.cacheGetHandler(key);
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if (data && isBe) {
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if (typeof $default === 'boolean')
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return JSON.parse(data);
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else
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return data;
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} else {
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if (typeof $default === 'function') {
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let value = $default();
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this.set(key,value,expire);
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return value;
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} else {
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this.set(key,$default,expire);
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return $default;
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}
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}
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}catch(e){
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return null;
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}
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}
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/**
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* 删除缓存
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* @param {Object} key
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*/
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clear(key)
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{
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try{
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let cahceValue = this.cacheGetHandler(key + this.cacheExpire);
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if(cahceValue)
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this.cacheClearHandler(key + this.cacheExpire);
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return this.cacheClearHandler(key);
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}catch(e){
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return false;
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}
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}
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/**
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* 清除过期缓存
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*/
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clearOverdue()
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{
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// let cacheList = uni.getStorageInfoSync(),that = this;
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// if (typeof cacheList.keys === 'object'){
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// cacheList.keys.forEach(item=>{
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// that.getExpireCahe(item);
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// })
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// }
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}
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/**
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* 获取缓存，调用后无需转换数据类型
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* @param {Object} key
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*/
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getItem(name){
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// let item = localStorage.getItem(name);
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let item = uni.getStorageSync(name);
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//先将拿到的试着进行json转为对象的形式
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try{
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item = JSON.parse(item);
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}catch(error){
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//如果不行就不是json的字符串，就直接返回
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item = item;
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}
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//如果有startTime的值，说明设置了失效时间
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if(item.startTime){
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let date = new Date().getTime();
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//何时将值取出减去刚存入的时间，与item.expires比较，如果大于就是过期了，如果小于或等于就还没过期
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if(date - item.startTime > item.expires){
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//缓存过期，清除缓存，返回false
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// localStorage.removeItem(name);
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uni.removeStorageSync(name);
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return false;
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}else{
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//缓存未过期，返回值
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return item.value;
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}
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}else{
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//如果没有设置失效时间，直接返回值
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return item;
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}
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}
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}
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export default new Cache;
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