invoice_fill_h5/src/utils/wx.js

/**
 * 获取 code
 * @returns 
 */
 export function getCode () {
  const matched = /[?&]*code=([^&]+)/.exec(location.search)
  if (matched) {
    return decodeURIComponent(matched[1])
  }
}

/**
 * 跳转授权页面
 */
export function getRedirectURL (force, code) {
  if (import.meta.env.DEV) return;

  const originCode = localStorage.getItem('wxcode');
  const wxfirst = localStorage.getItem('wxfirst') === null;

  localStorage.setItem('wxcode', code)
  localStorage.setItem('wxfirst', 'not');

  if (force || wxfirst || !code || code === originCode) {
    const origin = location.origin + location.pathname
    const searchStr = location.search.replace(/code\=[^&]+/, '').replace(/state\=[^&]+/, '').replace(/^&+/g, '').replace(/\?+$/, '')
    const local = origin + searchStr + location.hash
    console.log('--------------------->')
    console.log(JSON.stringify(location))
    console.log(local)
    console.log('--------------------->')
    return `https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxd3bab568bc42d1de&redirect_uri=${encodeURIComponent(local)}&response_type=code&scope=snsapi_base&state=123#wechat_redirect`
  }
}
/**
 * 初始化微信 SDK
 * @param {*} params 
 * @returns 
 */
export function initWxSDK(params) {
  return new Promise((resolve, reject) => {
    wx.config({
      beta: true, // 获取微信抬头必须这个
      debug: import.meta.env.DEV, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
      appId: params.appId, // 必填，公众号的唯一标识
      timestamp: params.timestamp, // 必填，生成签名的时间戳
      nonceStr: params.nonceStr, // 必填，生成签名的随机串
      signature: params.signature,// 必填，签名
      jsApiList: ['chooseInvoiceTitle'] // 必填，需要使用的JS接口列表
    });

    wx.ready(() => {
      console.log('---微信SDK初始化成功---')
      resolve();
      window.__initwx = true;
    });
    wx.error(function(res){
      console.log('---微信SDK初始化失败---')
      console.error(res);
      window.__initwx = false;
      reject();
    });    
  });
}

/**
 * 获取微信抬头
 * @param {*} scene 
 * @returns 
 */
export function chooseInvoiceTitle(scene) {
  return new Promise((resolve, reject) => {
    if (!window.__initwx) {
      reject('微信SDK未成功初始化');
      return;
    }

    wx.invoke('chooseInvoiceTitle', { scene }, function (res) {
      console.log('----------chooseInvoiceTitle------', res);
      if (res.err_msg == 'chooseInvoiceTitle:ok') {
      // choose_invoice_title_info 结构如下：
      // {
      //   "type":"0",
      //   "title":"腾讯科技(深圳)有限公司",
      //   "taxNumber":"123466789987646131",
      //   "companyAddress":"深圳市南山区某某路腾讯大厦",
      //   "telephone":"123456789",
      //   "bankName":"某某银行",
      //   "bankAccount":"621111111111290"
      // }
        resolve(typeof res.choose_invoice_title_info == 'string' ? JSON.parse(res.choose_invoice_title_info) : res.choose_invoice_title_info);
      } else {
        console.error(res.err_msg);
        console.debug(res);
        reject(res.err_msg);
      }
    });
  });
}

// 本系统的特殊情况，使用外部服务初始化微信SDK
export function initWxSDK2() {
  const link = window.location.origin + window.location.pathname + window.location.search;
  const servAPI = '//api.h5.njyunzhi.com/mp/jssdk?url=' + encodeURIComponent(link);

  fetch(servAPI).then(res => res.json()).then(res => {
    console.log('----------', res.data);
    initWxSDK(res.data);
  });

}