index.js

//require needed modules
const express = require("express");
const expressEdge = require("express-edge");
const bodyParser = require("body-parser");
const expressValidator = require("express-validator");
const flash = require("connect-flash");
const session = require("express-session");
const passport = require("passport");
const fileUpload = require("express-fileupload");


const redisClient = require("redis").createClient();
const RedisStore = require("connect-redis")(session);

//redis options object ,,, TODO: refactore to config/
const options = {
	host: "localhost",
	client: redisClient,
	// port: 6379,
};

//require routes
const auth = require("./routes/auth");
const home = require("./routes/home");
const coach = require("./routes/coach");
const user = require("./routes/user");
const admin = require("./routes/admin");
const events = require("./routes/events");
const courses = require("./routes/courses");
const message = require("./routes/messages");
const api = require("./routes/api");
const recApi = require('./routes/recomSys')
const pushSubscription = require('./routes/pushSubscription')
const report = require("./routes/report");

//environment variables
const {
	SESS_LifeTime = 10800000, // 3 hours
	NODE_ENV = "developement",
	SESS_SECRET = "blabla random string", // this must be refactored to a config file with all the keys
} = process.env;

const IN_PROD = NODE_ENV === "production"; // true if we are in production

//connect to the database
const db = require("./config/database");
db.authenticate()
	.then(() => {
		console.log("Database connected");
	})
	.catch(error => {
		console.log(error.message);
	});

//synchronize database
db.sync({ forced: true }).then(() => {
	console.log("database synchronized ");
});

//create the express app
const app = express();

//set up file upload
app.use(fileUpload());

//set up public files directory
app.use(express.static("public"));
//set up views directory
app.use(expressEdge);
app.set("views", __dirname + "/views");
//body parser configuration
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

//sessions
const sessionMiddleware = session({
	store: new RedisStore(options),
	unset: "destroy",
	resave: false, // this will prevent from saving to the sess_store eventho the sess isn't modified
	secret: SESS_SECRET,
	saveUninitialized: false, // dont store the new sessions with no data
	cookie: {
		// maxAge: SESS_LifeTime,
		sameSite: true, // protect against csrf
		secure: IN_PROD,
	},
})
app.use(sessionMiddleware);

//
// io server 
const ioServer = require('./config/socket').init(app, sessionMiddleware);


//flash
app.use(flash());

//body parser configuration
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

// express validator
app.use(expressValidator());
// connect flash
app.use(flash());

//set up public files directory
app.use(express.static("public"));
//set up views directory
app.use(expressEdge);
app.set("views", __dirname + "/views");

//passport init
app.use(passport.initialize());
app.use(passport.session());

// app.use(function (req, res, next) {
// 	res.header('Access-Control-Allow-Origin', 'http://5cc87506.ngrok.io');
// 	res.header('Access-Control-Allow-Credentials', true);
// 	res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
// 	next();
// });

//use routes
app.use("/auth", auth);
app.use("/coach", coach);
app.use("/user", user);
app.use("/admin", admin);
app.use("/", home);
app.use("/events", events);
app.use("/courses", courses);
app.use("/messages", message);
app.use("/api", api);
app.use("/recSys", recApi)
app.use('/subscribe', pushSubscription);
app.use("/report", report);
app.get("*", (req, res) => {
	res.render("404");
});


//listen to requests
const port = 3000 || process.env.PORT;
ioServer.listen(port, () => {
	console.log("server listening to port " + port);
});