import request from 'request-promise'const base = 'https://api.weixin.qq.com/cgi-bin/'const api = { accessToken: base + 'token?grant_type=client_credential'}export default class Wechat { constructor(opts){ this.opts = Object.assign({}, opts) this.appID = opts.appID this.getAccessToken = opts.getAccessToken this.saveAccessToken = opts.saveAccessToken this.fetchAccessToken() } async request (options){ options = Object.assign({}, options, {json:true}) try { const response = await request(options) ? ? console.log(response) ? ? return response } catch (error) { console.error(error) } } async fetchAccessToken () { let data = await this.getAccessToken() if(!this.isValidAccessToken(data)){ data = await this.updateAccessToken() } await this.saveAccessToken(data) return data } async updateAccessToken () { ? ? const url = api.accessToken + '&appid=' + this.appID + '&secret=' + this.appSecret? ? ? ?const data = await this.request({url: url})? ? ? ?const now = (new Date().getTime())? ? ? ?const expiresIn = now + (data.expires_in - 20) * 1000? ? ? ?data.expires_in = expiresIn? ? ? ?return data? ? }? ? ?isValidAccessToken (data) { if (!data || !data.access_token || !data.expires_in) { return fasle } const expiresIn = data.expires_in const now = (new Data().getTime()) if (now < expiresIn) { return true } else { return fasle }? }} ??