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87 lines
2.0 KiB
JavaScript

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