shop-applet/utils/cache.js

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// +----------------------------------------------------------------------
// | CRMEB [ CRMEB赋能开发者助力企业发展 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2016~2021 https://www.crmeb.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed CRMEB并不是自由软件未经许可不能去掉CRMEB相关版权
// +----------------------------------------------------------------------
// | Author: CRMEB Team <admin@crmeb.com>
// +----------------------------------------------------------------------
import { EXPIRE } from '../config/app';
class Cache {
constructor(handler) {
this.cacheSetHandler = uni.setStorageSync;
this.cacheGetHandler = uni.getStorageSync;
this.cacheClearHandler = uni.removeStorageSync;
this.cacheExpire = '_expire_2019_12_17_18_44';
}
/**
* 获取当前时间戳
*/
time()
{
return Math.round(new Date() / 1000);
}
/**
* 设置过期时间缓存
* @param {Object} key
* @param {Object} expire
*/
setExpireCahe(key,expire)
{
expire = expire !== undefined ? expire : EXPIRE;
if (expire) {
this.cacheSetHandler(key + this.cacheExpire,this.time() + expire)
}
}
/**
* 缓存是否过期,过期自动删除
* @param {Object} key
* @param {Object} $bool true = 删除,false = 不删除
*/
getExpireCahe(key,$bool)
{
try{
let time = this.cacheGetHandler(key + this.cacheExpire);
if (time) {
let newTime = parseInt(time);
if (time && time < this.time() && !Number.isNaN(newTime)) {
if ($bool === undefined || $bool === true) {
this.cacheClearHandler(key);
this.cacheClearHandler(key + this.cacheExpire);
}
return false;
} else
return true;
} else {
return !!this.cacheGetHandler(key);
}
}catch(e){
return false;
}
}
/**
* 设置缓存
* @param {Object} key
* @param {Object} data
*/
set(key,data,expire){
if(typeof data === 'object')
data = JSON.stringify(data);
try{
this.setExpireCahe(key,expire);
return this.cacheSetHandler(key,data);
}catch(e){
return false;
}
}
/**
* 检测缓存是否存在
* @param {Object} key
*/
has(key)
{
return this.getExpireCahe(key);
}
/**
* 获取缓存
* @param {Object} key
* @param {Object} $default
* @param {Object} expire
*/
get(key,$default,expire){
try{
let isBe = this.getExpireCahe(key);
let data = this.cacheGetHandler(key);
if (data && isBe) {
if (typeof $default === 'boolean')
return JSON.parse(data);
else
return data;
} else {
if (typeof $default === 'function') {
let value = $default();
this.set(key,value,expire);
return value;
} else {
this.set(key,$default,expire);
return $default;
}
}
}catch(e){
return null;
}
}
/**
* 删除缓存
* @param {Object} key
*/
clear(key)
{
try{
let cahceValue = this.cacheGetHandler(key + this.cacheExpire);
if(cahceValue)
this.cacheClearHandler(key + this.cacheExpire);
return this.cacheClearHandler(key);
}catch(e){
return false;
}
}
/**
* 清除过期缓存
*/
clearOverdue()
{
// let cacheList = uni.getStorageInfoSync(),that = this;
// if (typeof cacheList.keys === 'object'){
// cacheList.keys.forEach(item=>{
// that.getExpireCahe(item);
// })
// }
}
}
export default new Cache;