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index.js
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292 lines (289 loc) · 8.44 KB
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'use strict';
// Imports dependencies and set up http server
const
express = require('express'),
bodyParser = require('body-parser'),
request = require('request'),
app = express().use(bodyParser.json()); // creates express http server
let goingOutTn = false;
// Sets server port and logs message on success
app.listen(process.env.PORT || 1337, () => console.log('webhook is listening on port 1337'));
// Creates the endpoint for our webhook
app.post('/webhook', (req, res) => {
let body = req.body;
// Checks this is an event from a page subscription
if (body.object === 'page') {
// Iterates over each entry - there may be multiple if batched
body.entry.forEach(function(entry) {
// Gets the message. entry.messaging is an array, but
// will only ever contain one message, so we get index 0
let webhookEvent = entry.messaging[0];
let psid = webhookEvent.sender.id;
// Check if the event is a message or postback and
// pass the event to the appropriate handler function
if (webhookEvent.message) {
handleMessage(psid, webhookEvent.message);
} else if (webhookEvent.postback) {
handlePostback(psid, webhookEvent.postback);
}
});
// Returns a '200 OK' response to all requests
res.status(200).send('EVENT_RECEIVED');
} else {
// Returns a '404 Not Found' if event is not from a page subscription
res.sendStatus(404);
}
});
// Adds support for GET requests to our webhook
app.get('/webhook', (req, res) => {
// Random string in env
let VERIFY_TOKEN = process.env.VERIFY_TOKEN;
// Parse the query params
let mode = req.query['hub.mode'];
let token = req.query['hub.verify_token'];
let challenge = req.query['hub.challenge'];
// Checks if a token and mode is in the query string of the request
if (mode && token) {
// Checks the mode and token sent is correct
if (mode === 'subscribe' && token === VERIFY_TOKEN) {
// Responds with the challenge token from the request
console.log('WEBHOOK_VERIFIED');
res.status(200).send(challenge);
} else {
// Responds with '403 Forbidden' if verify tokens do not match
res.sendStatus(403);
}
}
});
// Function to get bars from google maps -> place api
// Finds bars that are open, sorted by location nearest
function getBars(lat, long) {
return new Promise(function(resolve, reject) {
request({
"uri": "https://maps.googleapis.com/maps/api/place/nearbysearch/json",
"qs": {
'location': lat + ',' + long,
'type': 'bar',
'opennow': true,
'rankby': 'distance',
'key': process.env.GOOGLE_MAPS_KEY
},
"method": "GET",
"json": true
}, (err, res, body) => {
if (err) {
reject(err);
}
resolve(body.results);
// If Results Were found
});
})
}
// Gets more information on places
// Used to get the website of the place
function getBarInfo(place_id) {
return new Promise(function(resolve, reject) {
request({
"uri": "https://maps.googleapis.com/maps/api/place/details/json",
"qs": {
'placeid': place_id,
'key': process.env.GOOGLE_MAPS_KEY
},
"method": "GET",
"json": true
}, (err, res, body) => {
if (err) {
reject(err);
}
resolve(body.result.website);
});
})
}
// Handles messages events
function handleMessage(sender_psid, received_message) {
// Checking for location info
if (received_message.attachments) {
let lat = received_message.attachments[0].payload.coordinates.lat;
let long = received_message.attachments[0].payload.coordinates.long;
// Call for bars near the coords
getBars(lat, long).then(function(info) {
let results = info.slice(0, 5);
let response = {
attachment: {
type: "template",
payload: {
template_type: "generic",
elements: []
}
}
}
let counter = 0;
for (let i = 0; i < results.length; i++) {
getBarInfo(results[i].place_id).then(function(website) {
counter++
results[i].website = website;
// Element to push to elements array for the response
var element = {
title: results[i].name,
image_url: "https://maps.googleapis.com/maps/api/place/photo?" +
"maxwidth=400" +
"&photoreference=" + results[i].photos[0].photo_reference +
"&key=" + process.env.GOOGLE_MAPS_KEY,
subtitle: results[i].vicinity,
default_action: {
type: "web_url",
url: results[i].website,
webview_height_ratio: "tall"
},
buttons: [{
type: "web_url",
url: results[i].website,
title: "View Website"
}]
}
response.attachment.payload.elements.push(element);
//If the last result, send the payload
if (counter === results.length) {
callSendAPI(sender_psid, {
"text": "Here are the closest bars to you:"
})
callSendAPI(sender_psid, response);
}
});
}
});
}
// Checks if the message contains text
if (received_message.text) {
// Create the payload for a basic text message, which
// will be added to the body of our request to the Send API
switch (received_message.text) {
case "Should I?":
response = getAnswer();
break;
}
// Send the response message
callSendAPI(sender_psid, response);
}
}
// Handles messaging_postbacks events
function handlePostback(sender_psid, received_postback) {
let response;
// Get the payload for the postback
let payload = received_postback.payload;
switch (payload) {
case "Get Started":
response = {
"attachment": {
"type": "template",
"payload": {
"template_type": "generic",
"elements": [{
"title": "Should You Go Out Tonight?",
"subtitle": "Click to begin."
}]
}
},
"quick_replies": [{
"content_type": "text",
"title": "Should I?",
"payload": "Should I?"
}]
}
break;
case "Should I?":
response = getAnswer();
break;
default:
response = {
"text": "I'm not quite sure what you mean"
}
}
// Send the message to acknowledge the postback
callSendAPI(sender_psid, response);
}
// Sends response messages via the Send API
function callSendAPI(sender_psid, response) {
showTyping(sender_psid, true);
console.log("In call send api");
// Construct the message body
let request_body = {
"recipient": {
"id": sender_psid
},
"message": response
}
console.log(request_body);
// Send the HTTP request to the Messenger Platform
request({
"uri": "https://graph.facebook.com/v2.6/me/messages",
"qs": {
"access_token": process.env.PAGE_ACCESS_TOKEN
},
"method": "POST",
"json": request_body
}, (err, res, body) => {
if (!err) {
console.log('message sent!')
} else {
console.error("Unable to send message:" + err);
}
console.log(body);
showTyping(sender_psid, false);
});
}
// Show typing call to Send API
function showTyping(sender_psid, bool) {
// Construct the message body
let response = 'typing_off';
if (bool === true) {
response = 'typing_on';
} else {
response = 'typing_off';
}
let request_body = {
"recipient": {
"id": sender_psid
},
"sender_action": response
}
// Send the HTTP request to the Messenger Platform
request({
"uri": "https://graph.facebook.com/v2.6/me/messages",
"qs": {
"access_token": process.env.PAGE_ACCESS_TOKEN
},
"method": "POST",
"json": request_body
}, (err, res, body) => {
if (!err) {
console.log('toggled typing')
} else {
console.error("Unable to toggle typing" + err);
}
});
}
function getAnswer() {
let randomNum = (Math.random() * 10);
if (randomNum >= 6) {
return {
"attachment": {
"type": "template",
"payload": {
"template_type": "generic",
"elements": [{
"title": "Yes!",
"subtitle": "Share your location to find events near you."
}]
}
},
"quick_replies": [{
"content_type": "location"
}]
}
} else {
return {
"text": "No! Stay in an catch up on Black Mirror Season 4"
}
}
}