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/**
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* 缓存数据优化
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* const storage = require('@/utils/storage');
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* import storage from '@/utils/storage'
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* 使用方法 【
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* 一、设置缓存
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* string storage.set('k', 'string你好啊');
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* json storage.set('k', { "b": "3" }, 2);
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* array storage.set('k', [1, 2, 3]);
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* boolean storage.set('k', true);
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* 二、读取缓存
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* 默认值 storage.get('k')
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* string storage.get('k', '你好')
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* json storage.get('k', { "a": "1" })
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* 三、移除/清理
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* 移除: storage.remove('k');
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* 清理：storage.clear();
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* 】
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* @type {String}
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*/
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const postfix = '_expiry' // 缓存有效期后缀
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module.exports = {
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/**
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* 设置缓存
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* @param {[type]} k [键名]
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* @param {[type]} v [键值]
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* @param {[type]} t [时间、单位秒]
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*/
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set(k, v, t) {
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uni.setStorageSync(k, v)
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const seconds = parseInt(t)
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if (seconds > 0) {
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let timestamp = Date.parse(new Date())
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timestamp = timestamp / 1000 + seconds
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uni.setStorageSync(k + postfix, timestamp + '')
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} else {
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uni.removeStorageSync(k + postfix)
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}
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},
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/**
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* 获取缓存
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* @param {[type]} k [键名]
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* @param {[type]} def [获取为空时默认]
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*/
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get(k, def) {
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const deadtime = parseInt(uni.getStorageSync(k + postfix))
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if (deadtime) {
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if (parseInt(deadtime) < Date.parse(new Date()) / 1000) {
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if (def) {
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return def
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} else {
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return false
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}
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}
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}
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const res = uni.getStorageSync(k)
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if (res) {
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return res
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}
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if (def == undefined || def == "") {
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def = false
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}
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return def
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},
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/**
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* 删除指定缓存
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* @param {Object} k
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*/
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remove(k) {
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uni.removeStorageSync(k)
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uni.removeStorageSync(k + postfix)
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},
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/**
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* 清理所有缓存
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* @return {[type]} [description]
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*/
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clear() {
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uni.clearStorageSync()
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}
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}
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