如何在Dialogflow ES构建的Telegram聊天机器人中获取用户first_name

你之前的路径错误导致无法提取到Telegram用户的first_name，正确的提取路径是agent.originalRequest.payload.from.first_name。

Telegram与Dialogflow集成时，用户身份信息会直接封装在agent.originalRequest.payload对象下，而非嵌套在data.message层级中。

修改后的完整代码 #

'use strict';
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const admin = require ('firebase-admin');
admin.initializeApp();
admin.auth();
const db = admin.firestore();

// 补充缺失的makeid函数实现
function makeid(length) {
  let result = '';
  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  const charactersLength = characters.length;
  let counter = 0;
  while (counter < length) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
    counter += 1;
  }
  return result;
}

exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
  const agent = new WebhookClient({ request, response });
  
  function welcome(agent) {
   agent.add(`Hi! Do you want to create an account?`);
  }
  
  function createUser(agent) {
     agent.add(`Thank you! You have successfully created your account`);
     let uid = makeid(28);
     let email = agent.parameters.email;
     let password = agent.parameters.user_password;
     // 正确提取Telegram用户first_name，同时保留参数作为 fallback
     let display_name = agent.originalRequest.payload?.from?.first_name || agent.parameters.display_name;
     
     admin.auth().createUser({uid: uid, email: email, password: password});
     db.collection('users').doc(uid).set({
       uid: uid, 
       display_name: display_name, 
     });
  }
 
  function fallback(agent) {
    agent.add(`I didn't understand`);
    agent.add(`I'm sorry, can you try again?`);
  }
 
  let intentMap = new Map();
  intentMap.set('Welcome Intent', welcome);
  intentMap.set('account.creation', createUser);
  intentMap.set('Default Fallback Intent', fallback);
  agent.handleRequest(intentMap);
});

关键说明 #

• 使用agent.originalRequest.payload.from.first_name直接获取Telegram用户的名字
• 加入可选链操作符?.防止因payload结构异常导致代码崩溃
• 保留agent.parameters.display_name作为备选，确保在无法获取payload信息时仍有可用值
• 补充了代码中缺失的makeid函数实现，避免运行报错

内容的提问来源于stack exchange，提问作者Yury_X