wx.js/src/mp/services/message.js

Wechat API

'use strict';

const _ = require('lodash');
const ServiceBase = require('./index');

const MESSAGE_URL = 'https://api.weixin.qq.com/cgi-bin/message/custom/send';
const MSG_TYPES = ['text', 'image', 'voice', 'video', 'music', 'news', 'mpnews', 'wxcard'];

class Message extends ServiceBase
{
  async send (msgType, openId, data) {
    msgType = msgType.toLowerCase();
    if (MSG_TYPES.indexOf(msgType) === -1)
      return false;

    switch (msgType) {
      case 'text':
        data = _.isPlainObject(data) ? data : { content: String(data) };
        break;
      
      case 'image':
      case 'voice':
      case 'video':
        data = _.isPlainObject(data) ? data : { media_id: String(data) };
        break;
      
      case 'news':
      case 'mpnews':
        if (_.isPlainObject(data)) {
          data = data.articles ? data : { articles: data };
        } else if (msgType === 'mpnews') {
          data = { media_id: String(data) };
        }
        break;
    }

    let postData = {
      touser: openId,
      msgtype: msgType
    }
    postData[msgType] = data;

    return await this.request('POST', MESSAGE_URL, { data: postData });
  }
}

MSG_TYPES.forEach(value => {
  let method = 'send' + value[0].toUpperCase() + value.substr(1);
  Message.prototype[method] = function (...args) {
    args = [value].concat(args);
    return this.send(...args);
  }
});

exports = module.exports = Message;