app.js

-/*
 * Copyright 2016-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the license found in the
 * LICENSE file in the root directory of this source tree.
 * 
 */

/* jshint node: true, devel: true */
'use strict';

const 
  bodyParser = require('body-parser'),
  config = require('config'),
  crypto = require('crypto'),
  express = require('express'),
  https = require('https'),  
  request = require('request'),
  { deleteFile,downloadFile ,renameFile} = require('./utils'),
  { sendAudioMessage,sendTextMessage,sendImageMessage,sendGifMessage,
    sendVideoMessage,sendFileMessage,sendButtonMessage,
    sendGenericMessage,sendReceiptMessage,sendQuickReply,sendReadReceipt,
    sendTypingOn,sendTypingOff,sendAccountLinking } = require('./messenger');

const got = require('got');
const fs = require('fs');
const fetch = (...args) =>
    import('node-fetch').then(({ default: fetch }) => fetch(...args));
var mysql = require('mysql');
var app = express();
// var con = mysql.createConnection({
//   host: "localhost",
//   user: "",
//   password: "",
//   database: ""
// });
app.set('port', process.env.PORT);
app.set('view engine', 'ejs');
app.use(bodyParser.json({ verify: verifyRequestSignature }));
app.use(express.static('public'));

/*
 * Be sure to setup your config values before running this code. You can 
 * set them using environment variables or modifying the config file in /config.
 *
 */

// App Secret can be retrieved from the App Dashboard
const APP_SECRET = "yourappsecret";


// Arbitrary value used to validate a webhook
const VALIDATION_TOKEN = "mytoken";

// Generate a page access token for your page from the App Dashboard
const PAGE_ACCESS_TOKEN = "your token"
   
// URL where the app is running (include protocol). Used to point to scripts and 
// assets located at this address. 
const SERVER_URL = "https://your url/"
// define the local linux server to download and send files
const DOWNLOAD_SERVER_URL= "yourdwnurl"

/*
 * Use your own validation token. Check that the token used in the Webhook 
 * setup is the same token used here.
 *
 */

app.get('/mozika/deleting/:files', function(req, res) {

    (async () => {

        await deleteFile(decodeURI(req.params.files));


    })();
});
app.get('/mozika/webhook', function(req, res) {
  if (req.query['hub.mode'] === 'subscribe' &&
      req.query['hub.verify_token'] === "mytoken") {
    console.log("Validating webhook");
    res.status(200).send(req.query['hub.challenge']);
  } else {
    console.error("Failed validation. Make sure the validation tokens match.");
    res.sendStatus(403);          
  }  
});
app.get('/', function(req, res) {

 res.send('bonjou');
});


/*
 * All callbacks for Messenger are POST-ed. They will be sent to the same
 * webhook. Be sure to subscribe your app to your page to receive callbacks
 * for your page. 
 * https://developers.facebook.com/docs/messenger-platform/product-overview/setup#subscribe_app
 *
 */
app.post('/webhook', function (req, res) {
  var data = req.body;

  // Make sure this is a page subscription
  if (data.object == 'page') {
    // Iterate over each entry
    // There may be multiple if batched
    data.entry.forEach(function(pageEntry) {
      var pageID = pageEntry.id;
      var timeOfEvent = pageEntry.time;

      // Iterate over each messaging event
      pageEntry.messaging.forEach(function(messagingEvent) {
        if (messagingEvent.optin) {
          receivedAuthentication(messagingEvent);
        } else if (messagingEvent.message) {
          receivedMessage(messagingEvent);
        } else if (messagingEvent.delivery) {
          receivedDeliveryConfirmation(messagingEvent);
        } else if (messagingEvent.postback) {
          receivedPostback(messagingEvent);
        } else if (messagingEvent.read) {
          receivedMessageRead(messagingEvent);
        } else if (messagingEvent.account_linking) {
          receivedAccountLink(messagingEvent);
        } else {
          console.log("Webhook received unknown messagingEvent: ", messagingEvent);
        }
      });
    });

    // Assume all went well.
    //
    // You must send back a 200, within 20 seconds, to let us know you've 
    // successfully received the callback. Otherwise, the request will time out.
    res.sendStatus(200);
  }
});

/*
 * This path is used for account linking. The account linking call-to-action
 * (sendAccountLinking) is pointed to this URL. 
 * 
 */
app.get('/authorize', function(req, res) {
  var accountLinkingToken = req.query.account_linking_token;
  var redirectURI = req.query.redirect_uri;

  // Authorization Code should be generated per user by the developer. This will 
  // be passed to the Account Linking callback.
  var authCode = "1234567890";

  // Redirect users to this URI on successful login
  var redirectURISuccess = redirectURI + "&authorization_code=" + authCode;

  res.render('authorize', {
    accountLinkingToken: accountLinkingToken,
    redirectURI: redirectURI,
    redirectURISuccess: redirectURISuccess
  });
});





/*
 * Verify that the callback came from Facebook. Using the App Secret from 
 * the App Dashboard, we can verify the signature that is sent with each 
 * callback in the x-hub-signature field, located in the header.
 *
 * https://developers.facebook.com/docs/graph-api/webhooks#setup
 *
 */
function verifyRequestSignature(req, res, buf) {
  var signature = req.headers["x-hub-signature"];

  if (!signature) {
    // For testing, let's log an error. In production, you should throw an 
    // error.
    console.error("Couldn't validate the signature.");
  } else {
    var elements = signature.split('=');
    var method = elements[0];
    var signatureHash = elements[1];

    var expectedHash = crypto.createHmac('sha1', APP_SECRET)
                        .update(buf)
                        .digest('hex');

    if (signatureHash != expectedHash) {
      throw new Error("Couldn't validate the request signature.");
    }
  }
}

/*
 * Authorization Event
 *
 * The value for 'optin.ref' is defined in the entry point. For the "Send to 
 * Messenger" plugin, it is the 'data-ref' field. Read more at 
 * https://developers.facebook.com/docs/messenger-platform/webhook-reference/authentication
 *
 */
function receivedAuthentication(event) {
  var senderID = event.sender.id;
  var recipientID = event.recipient.id;
  var timeOfAuth = event.timestamp;

  // The 'ref' field is set in the 'Send to Messenger' plugin, in the 'data-ref'
  // The developer can set this to an arbitrary value to associate the 
  // authentication callback with the 'Send to Messenger' click event. This is
  // a way to do account linking when the user clicks the 'Send to Messenger' 
  // plugin.
  var passThroughParam = event.optin.ref;

  console.log("Received authentication for user %d and page %d with pass " +
    "through param '%s' at %d", senderID, recipientID, passThroughParam, 
    timeOfAuth);

  // When an authentication is received, we'll send a message back to the sender
  // to let them know it was successful.
  sendTextMessage(senderID, "Authentication successful");
}

/*
 * Message Event
 *
 * This event is called when a message is sent to your page. The 'message' 
 * object format can vary depending on the kind of message that was received.
 * Read more at https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-received
 *
 * For this example, we're going to echo any text that we get. If we get some 
 * special keywords ('button', 'generic', 'receipt'), then we'll send back
 * examples of those bubbles to illustrate the special message bubbles we've 
 * created. If we receive a message with an attachment (image, video, audio), 
 * then we'll simply confirm that we've received the attachment.
 * 
 */
function receivedMessage(event) {
  var senderID = event.sender.id;
  var recipientID = event.recipient.id;
  var timeOfMessage = event.timestamp;
  var message = event.message;

  console.log("Received message for user %d and page %d at %d with message:", 
    senderID, recipientID, timeOfMessage);
  console.log(JSON.stringify(message));

  var isEcho = message.is_echo;
  var messageId = message.mid;
  var appId = message.app_id;
  var metadata = message.metadata;

  // You may get a text or attachment but not both
  var messageText = message.text;
  var messageAttachments = message.attachments;
  var quickReply = message.quick_reply;

  if (isEcho) {
    // Just logging message echoes to console
    console.log("Received echo for message %s and app %d with metadata %s", 
      messageId, appId, metadata);
    return;
  } else if (quickReply) {
    var quickReplyPayload = quickReply.payload;
    console.log("Quick reply for message %s with payload %s",
      messageId, quickReplyPayload);

   // sendTextMessage(senderID, "Quick reply tapped");
      switch (quickReplyPayload) {

        // for presenting you as developer
          case 'Developers':

              const dev_elem= [{
                  title: "Your name",
                  subtitle: "Your skills ",
                  item_url: "your url",
                  image_url: "image of your profile",
                  buttons: [{
                      type: "web_url",
                      url: "https://m.me/yourfburl",
                      title: "💬 M'envoyer un MP"
                  }, {
                      type: "phone_number",
                      title: "📱 M'appeler",
                      payload: "yournumber with country index"
                  }],
              }];
              sendGenericMessage(senderID,dev_elem)
              break;
              // easy way to share your app with others
          case 'Sharing':
              (async () => {


                  await sendTextMessage(senderID,"If you like my apps then just transfert this texte to your friends 👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻 ")
                  await sendTextMessage(senderID,"Hi friend , this is awesome chatbot   click here:=>=> https://m.me/your_fb_page_pseudo_or_id <=<=, ;)  ")


              })();
          default:
              break;


      }
  
    return;
  }

  if (messageText) {
    	// sendTextMessage(senderID, messageText);
          
  
    // If we receive a text message, check to see if it matches any special
    // keywords and send back the corresponding example. Otherwise, just echo
    // the text we received.
    switch (messageText) {
     
        
      case 'image':
        sendImageMessage(senderID);
        break;

      case 'gif':
        sendGifMessage(senderID);
        break;

      case 'audio':
        sendAudioMessage(senderID);

        break;

      case 'video':
        sendVideoMessage(senderID);
        break;

      case 'file':
        sendFileMessage(senderID);
        break;

      case 'button':
        sendButtonMessage(senderID);
        break;

      case 'generic':
        sendGenericMessage(senderID);
        break;

      case 'receipt':
          sendReceiptMessage(senderID);

        break;

      case 'quick reply':
        sendQuickReply(senderID);
        break;        

      case 'read receipt':
        sendReadReceipt(senderID);
        break;        

      case 'typing on':
        sendTypingOn(senderID);
        break;        

      case 'typing off':
        sendTypingOff(senderID);
        break;        

      case 'account linking':
        sendAccountLinking(senderID);
        break;

      default:


            // default response here
        
      
        break;
    }
  } else if (messageAttachments) {
   // sendTextMessage(senderID, "Message with attachment received");
  }
}


/*
 * Delivery Confirmation Event
 *
 * This event is sent to confirm the delivery of a message. Read more about 
 * these fields at https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-delivered
 *
 */
function receivedDeliveryConfirmation(event) {
  var senderID = event.sender.id;
  var recipientID = event.recipient.id;
  var delivery = event.delivery;
  var messageIDs = delivery.mids;
  var watermark = delivery.watermark;
  var sequenceNumber = delivery.seq;

  if (messageIDs) {
    messageIDs.forEach(function(messageID) {
      console.log("Received delivery confirmation for message ID: %s", 
        messageID);
    });
  }

  console.log("All message before %d were delivered.", watermark);
}


/*
 * Postback Event
 *
 * This event is called when a postback is tapped on a Structured Message. 
 * https://developers.facebook.com/docs/messenger-platform/webhook-reference/postback-received
 * 
 */
function receivedPostback(event) {
  var senderID = event.sender.id;
  var recipientID = event.recipient.id;
  var timeOfPostback = event.timestamp;

  // The 'payload' param is a developer-defined field which is set in a postback 
  // button for Structured Messages. 
  var payload = event.postback.payload;

  console.log("Received postback for user %d and page %d with payload '%s' " + 
    "at %d", senderID, recipientID, payload, timeOfPostback);
	
     const https = require('https');
 

    // example of welcome message toggling with btn get started
    if(payload=="<GET_STARTED_PAYLOAD>")
    {
        (async () => {


            await sendTextMessage(senderID,"welcome to my page")
            await sendTextMessage(senderID,"lets test async stuff")
            await sendTextMessage(senderID,"normaly number bellow will appear in order of appearance ")
            for(let i=0; i<=10;i++)
            {
            await sendTextMessage(senderID,i)

            }



        })();
        return;
    }
    




  // When a postback is called, we'll send a message back to the sender to 
  // let them know it was successful
  //sendTextMessage(senderID, "Postback called");

}

/*
 * Message Read Event
 *
 * This event is called when a previously-sent message has been read.
 * https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-read
 * 
 */
function receivedMessageRead(event) {
  var senderID = event.sender.id;
  var recipientID = event.recipient.id;

  // All messages before watermark (a timestamp) or sequence have been seen.
  var watermark = event.read.watermark;
  var sequenceNumber = event.read.seq;

  console.log("Received message read event for watermark %d and sequence " +
    "number %d", watermark, sequenceNumber);
}

/*
 * Account Link Event
 *
 * This event is called when the Link Account or UnLink Account action has been
 * tapped.
 * https://developers.facebook.com/docs/messenger-platform/webhook-reference/account-linking
 * 
 */
function receivedAccountLink(event) {
  var senderID = event.sender.id;
  var recipientID = event.recipient.id;

  var status = event.account_linking.status;
  var authCode = event.account_linking.authorization_code;

  console.log("Received account link event with for user %d with status %s " +
    "and auth code %s ", senderID, status, authCode);
}



// Start server
// Webhooks must be available via SSL with a certificate signed by a valid 
// certificate authority.
app.listen(app.get('port'), function() {
  console.log('Node app is running on port', app.get('port'));
});

module.exports = app;