WechatApp/components/Share/hook.js

import { isObject } from "@/utils/is";
// import { SharePosterGetShareInfo } from '@/api'

/**
 * 对象转字符串
 * { a: 1, b: 2 } ==> a=1&b=2
*/ 
export function objectTOString(obj, options) {
	const { separator = '&' } = options || {}
	if(!isObject(obj)) return '';
	const arr = []
	for (let key in obj) {
		let str = [key,obj[key]].join('=')
		arr.push(str)
	}
	return arr.join(separator)
}

/**
 * 字符串转对象
 * a=1&b=2  ==>  { a: 1, b: 2}
 * a =  1& b =2  ==>  { a: 1, b: 2}
*/ 
export function stringToObject(str, options){
	if(!str) return {}
	const { separator = '&' } = options || {}
	str = decodeURI(str)
	const obj = {}
	const keys = str.split(separator)
	keys.forEach((key) => {
		const [k, v] = key.split('=');
		obj[k.trim()] = v.trim();
	});
	return obj;
}

export const SHARE_ID = 'sharerID' // 后端定义的

const cacheProfix = 'share_' // 缓存前缀
const cacheKeys = [SHARE_ID] // 需要缓存的keys
const getCacheKey = (key) => cacheProfix + key


export function useShare() {
	// 获取识别二维码的信息
	async function formatShareInfo(id) {
		return
		try {
				let { data } = await SharePosterGetShareInfo({ id })
				console.log('data', data)
				// const data = 'shareId=X&id=xx'
				const param = stringToObject(data.search)
				
				// 需要缓存起来的key
				for (let key of cacheKeys) {
					const time = Date.now()
					if(param[key]){
						uni.setStorageSync(getCacheKey(key), {
							time, // 存储时间
							expire: time + 1000 * 60 * 60 * 24 * 1, // 过期时间 1代表一天
							value: param[key] || ''
						})
						delete param[key]
					}
				}
				return Promise.resolve(param)
			
		} catch (error) {
			//TODO handle the exception
		}
	}
	
	// 通过key获取指定缓存
	function getShareInfo(key){
		const cacheKey = getCacheKey(key)
		const storageVal = uni.getStorageSync(cacheKey);
		const nowTime = Date.now()
		if(storageVal){
			if(nowTime < storageVal.expire){
				return storageVal.value
			}
			uni.removeStorageSync(cacheKey)
		}
		return ""
	}
	// 
	return { formatShareInfo, getShareInfo }
}