chenglijuan
90 lines
2.5 KiB
JavaScript
90 lines
2.5 KiB
JavaScript
// app.js
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const { BASE_URL, API } = require('./utils/config')
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const { request } = require('./utils/api')
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App({
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onLaunch() {
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// 优先从本地缓存恢复登录态，避免阻塞页面
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const cached = wx.getStorageSync('userInfo')
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if (cached && cached.openid) {
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this.globalData.userInfo = cached
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this.globalData.isLoggedIn = true
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}
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// 静默登录获取最新 session，不阻塞页面
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this.silentLogin()
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},
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silentLogin() {
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this._loginPromise = new Promise((resolve) => {
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this._loginResolve = resolve
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wx.login({
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success: (loginRes) => {
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if (loginRes.code) {
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this.loginWithCode(loginRes.code)
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} else {
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console.error('wx.login 失败', loginRes.errMsg)
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this.handleLoginFail()
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}
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},
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fail: (err) => {
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console.error('wx.login 调用失败', err)
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this.handleLoginFail()
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}
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})
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})
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},
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/**
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* 返回登录完成的 Promise，供页面 await 使用
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* @param {boolean} useCache - 是否在已有缓存时立即 resolve
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* @returns {Promise<object|null>}
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*/
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waitLogin(useCache = false) {
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if (useCache && this.globalData.isLoggedIn) {
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return Promise.resolve(this.globalData.userInfo)
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}
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return this._loginPromise || Promise.resolve(this.globalData.userInfo || null)
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},
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async loginWithCode(code) {
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try {
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const data = await request({
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url: BASE_URL + API.LOGIN,
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method: 'GET',
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data: { code }
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})
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const userInfo = {
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openid: data.openid,
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sessionKey: data.session_key,
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unionid: data.unionid || ''
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}
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this.globalData.userInfo = userInfo
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this.globalData.isLoggedIn = true
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this.globalData.loginFailed = false
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wx.setStorageSync('userInfo', userInfo)
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if (this._loginResolve) this._loginResolve(userInfo)
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} catch (err) {
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console.error('后端登录失败', err)
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// 如果有缓存登录态，登录失败不立即清除，让页面继续使用缓存
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if (!this.globalData.isLoggedIn) {
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this.handleLoginFail()
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} else {
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this.globalData.loginFailed = true
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if (this._loginResolve) this._loginResolve(this.globalData.userInfo)
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}
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}
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},
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handleLoginFail() {
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this.globalData.isLoggedIn = false
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this.globalData.loginFailed = true
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if (this._loginResolve) this._loginResolve(null)
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},
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globalData: {
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userInfo: null,
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isLoggedIn: false,
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loginFailed: false
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}
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})
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