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@mikkipastel
Created October 4, 2017 04:57
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facebook chatbot from cloud function in firebase
//Reference from https://medium.com/@Astider/how-to-สร้าง-messenger-chatbot-แบบ-serverless-ด้วย-google-firebase-908c3eaba67e
const functions = require('firebase-functions');
// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
// Create and Deploy Your First Cloud Functions
// https://firebase.google.com/docs/functions/write-firebase-functions
const VERIFIED_TOKEN = "YOUR_VERIFIED_TOKEN"
exports.bearService = functions.https.onRequest((request, response) => {
if(request.method == "GET") {
if (request.query['hub.mode'] === 'subscribe' &&
request.query['hub.verify_token'] === "VERIFIED_TOKEN_BEAR") {
console.log("Validating webhook");
response.status(200).send(request.query['hub.challenge']);
}
else {
console.error("Failed validation. Make sure the validation tokens match.");
response.sendStatus(403);
}
} else if(request.method == "POST") {
var data = request.body;
if (data.object === 'page') {
data.entry.forEach(entry => {
var pageID = entry.id;
var timeOfEvent = entry.time;
console.log('entry : ${JSON.stringify(entry)}')
entry.messaging.forEach(event => {
if (event.message) {
receivedMessage(event)
} else {
console.log("Webhook received unknown event: ", event)
}
})
})
response.sendStatus(200)
}
}
});
function receivedMessage(event) {
let senderID = event.sender.id
let recipientID = event.recipient.id
let timeOfMessage = event.timestamp
let message = event.message
//ถ้าข้อความมาแล้ว log ตรงนี้จะเห็นข้อความเลยครับ
console.log("Received message for user %d and page %d at %d with message:",
senderID, recipientID, timeOfMessage)
console.log(JSON.stringify(message))
let messageId = message.mid
let messageText = message.text
let messageAttachments = message.attachments
if (messageText) {
//ส่วนนี้ใช้ Switch case มาทำ rule-base คือดักคำมาทำงานแตกต่างกันไป
//เรียกได้ว่าเป็นวิธีที่ basic และง่ายสุดในการทำบอทก็ว่าได้ 555
if (messageText.toLowerCase()) {
if (messageText.search('hello') >= 0) {
greeting(senderID)
} else {
sendTextMessage(senderID, messageText)
}
}
} else if (messageAttachments) {
sendTextMessage(senderID, "Message with attachment received");
}
}
function greeting(recipientId) {
let messageData = {
recipient: {
id: recipientId
},
message: {
text: "Hello"
}
}
callSendAPI(messageData)
}
function sendTextMessage(recipientId, messageText) {
//จัดข้อความที่จะส่งกลับในรูปแบบ object ตามที่ Messenger กำหนด
let messageData = {
recipient: {
id: recipientId
},
message: {
text: messageText//,
//metadata: "DEVELOPER_DEFINED_METADATA"
}
}
callSendAPI(messageData)
}
const axios = require('axios')
function callSendAPI(messageData) {
console.log('message data : ${JSON.stringify(messageData)}');
axios({
method: 'POST',
url: 'https://graph.facebook.com/v2.6/me/messages',
params: {
'access_token': '<YOUR_FACEBOOK_PAGETOKEN>'
},
data: messageData
})
.then(response => {
if (response.status == 200) {
let body = response.data
let recipientId = body.recipient_id;
let messageId = body.message_id;
if (messageId) {
console.log("Successfully sent message with id %s to recipient %s",
messageId, recipientId);
} else {
console.log("Successfully called Send API for recipient %s",
recipientId);
}
}
else {
console.error("Failed calling Send API", response.status,
response.statusText, response.data.error);
}
})
.catch(error => {
console.log('error : ${error}')
console.log('axios send message failed');
})
}
{
"name": "functions",
"description": "Cloud Functions for Firebase",
"dependencies": {
"firebase-admin": "~5.2.1",
"firebase-functions": "^0.6.2",
"axios": "0.16.2"
},
"private": true
}
@fernandoamorim30
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@mikkipastel and @ispiropoulos thanks for the code.

@ispiropoulos using your code, the variables not having same value.

request sh1 diggest sha1=2e3090b8af056d92c203073c1134de22d158f1c4
request hub signature sha1=1de52ebb68dc5c84962415acf39dc15da3a05773

You can help me to solve that?!

Thanks

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