server.js

require('newrelic');
const express = require('express');
const path = require('path');
const Bot = require('messenger-bot');

const Cache = require('./components/cache');
const Actions = require('./components/actions');
const Utterance = require('./components/utterance');

const CafeRandomActions = require('./components/actions/cafe-random');
const WithinCountryActions = require('./components/actions/within-country');
const WithinProximityActions = require('./components/actions/within-proximity');
const OtherActions = require('./components/actions/other');
const Analytics = require('./components/analytics');
const TelegramConfig = require('./config/telegram');
const Notify = require('./components/notify');
const Utility = require('./components/actions/utility');

const {
	handleRandomRepeat
} = require('./components/actions/cafe-random-repeat');

const app = express();

/** CONFIG */
process.env.PORT = process.env.PORT || 8080;
const config = {
  development: {
    token: process.env.TOKEN,
    verify: process.env.VERIFY,
    app_secret: process.env.APP_SECRET
  },
  production: {
    token: process.env.facebook_token,
    verify: process.env.verification_token,
    app_secret: process.env.facebook_app_secret
  },
};

const bot = new Bot(config[process.env.NODE_ENV]);

const postbackHandlers = {
	[Actions.CAFE_RANDOM]: CafeRandomActions.handle,
	[Actions.WITHIN_COUNTRY_RANDOM]: WithinCountryActions.handleRandom,
	[Actions.WITHIN_COUNTRY_RANDOM_REPEAT]: handleRandomRepeat,
	[Actions.WITHIN_PROXIMITY_RANDOM_REPEAT]: handleRandomRepeat,
	[Actions.WITHIN_PROXIMITY_RANDOM]: WithinProximityActions.handleRandom,
	[Actions.WITHIN_200M_RANDOM]: WithinProximityActions.handle200mRandom,
	[Actions.WITHIN_500M_RANDOM]: WithinProximityActions.handle500mRandom,
	[Actions.WITHIN_2KM_RANDOM]: WithinProximityActions.handle2kmRandom,
	[Actions.WITHIN_NEVERMIND]: WithinProximityActions.handleNevermind
};

bot.on('postback', (payload, reply) => {
	console.log('|--- bot.on("postback") ---|');
	const senderFacebookId = payload.sender.id;
	const action = payload.postback.payload;
	if (action === Actions.WITHIN_PROXIMITY_RANDOM || action === Actions.WITHIN_COUNTRY_RANDOM) {
		Cache.setLastAction(senderFacebookId, action);
	}
	bot.getProfile(senderFacebookId, (err, profile) => {
		Object.assign(profile, { sender: payload.sender });
		const label = payload.postback.payload;
		const handler = postbackHandlers[action];
		handler ? handler(reply, profile) : OtherActions.handleUnknown();
		Analytics.sendEvent(action, label, senderFacebookId);
	});
});

bot.on('message', (payload, reply) => {
	console.log('|--- bot.on("message") ---|');
	const senderFacebookId = payload.sender.id;
	const isText = (typeof payload.message.text !== 'undefined')
	const isAttachments = (typeof payload.message.attachments !== 'undefined');

	bot.getProfile(senderFacebookId, (err, profile) => {
		Object.assign(profile, { sender: payload.sender });
		Cache.setUser(senderFacebookId, profile.first_name);
		if(isText) {
			Utterance.handleText(bot, reply, payload.sender.id);
		} else if(isAttachments) {
			if(err) {
				console.error(err);
				Utility
			} else {
				const { attachments } = payload.message;
				attachments.forEach(attachment => {
					if(attachment.type === 'location') {
						const { coordinates } = attachment.payload;
						Utterance.handleLocation(reply, profile, coordinates, () => {
							reply('It\'s coming soon!');
						});
					}
				});
			}
		}
	});
});

bot.on('error', (err) => {
	console.log('|--- bot.on("error") ---|');
  console.log(err.message);
});

app.use("/fbbot", bot.middleware());
app.use("/_coverage", express.static(path.resolve('./coverage/lcov-report')));

if (process.env.NODE_ENV === "development") {
	app.use("/", require("./config/details.js"));
}

(TelegramConfig.notificationBotToken && TelegramConfig.chatId) && (() => {
	const message = `Good day, commanders. KopiBoy has just started in \`${process.env.NODE_ENV}\` environment.`;
	Notify('telegram', message, {
		chatId: TelegramConfig.chatId,
		token: TelegramConfig.notificationBotToken
	});
})();

app.listen(process.env.PORT);
console.log(`Kopiboy bot server running at port ${process.env.PORT}.`);