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app.js
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app.js
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var express = require('express');
var app = express();
var body_parser = require('body-parser');
var request = require('request');
// Loading tokens
var config = require('./config.js').getConfig();
// Import API.AI and identify with token
var apiai = require('apiai');
var api = apiai(config.apiaitoken);
// Import our own webhook functions
var apiaiUtils = require('./utils/apiaiutils.js');
var facebookUtils = require('./utils/facebookutils.js');
// Define port
app.set('port', (process.env.PORT || 5000));
// Parser for forms
var json_body_parser = body_parser.json();
var url_body_parser = body_parser.urlencoded({ extended: false });
// Webhook for Facebook - Subscription
app.get('/facebook', json_body_parser, function(request, response) {
if ((request.query['hub.mode'] === 'subscribe')
&& (request.query['hub.verify_token'] === config.facebook.verification_token)) {
console.log('Facebook webhook validated');
response.status(200).send(request.query['hub.challenge']);
} else {
console.error('Failed Facebook webhook validation.');
response.sendStatus(403);
}
})
// Webhook for Facebook - handle message requests
app.post('/facebook', json_body_parser, function(req, response) {
const data = req.body;
if (data.object === "page") {
data.entry.forEach(pageEntry => {
pageEntry.messaging.forEach(messagingEvent => {
if (messagingEvent.message) {
if (!messagingEvent.message.is_echo) {
facebookUtils.handleFacebookTextMessage(messagingEvent);
}
}
})
})
}
response.sendStatus(200);
})
// Webhook for API.AI - request for a fulfillment
app.post('/apiai', json_body_parser, function(request, response) {
// API.AI requires help for a customized question
apiaiUtils.fulfillmentRequest(request, response);
})
// Launching server
app.listen(app.get('port'), function() {
console.log('Node app is running on port ', app.get('port'));
})