index_vidly.js

const express = require('express');
const app = express();
const genre_router = require('./routers/genres');
const home_router = require('./homepage/home');
const morgan = require('morgan');
const mongoose = require('mongoose');
const customers = require('./routers/customers');
const movies = require('./routers/movies');
const rentals = require('./routers/rentals');
const users = require('./routers/users');
const auth = require('./routers/auth');
const config = require('config');
const error = require('./middlewares/error');
const winston = require('winston');
const helmet = require('helmet');
const compression = require('compression');

winston.add(new winston.transports.File({filename: 'logfile.log'}));
process.on('uncaughtException', (ex) => {
    winston.error(ex.message, ex);
});

if (!config.get("jwtPrivateKey")) {
    console.error("Fatal Error. jwtPrivateKey not defined");
    process.exit(1);
} else {
    console.log("Starting with secure key ", config.get("jwtPrivateKey"));
}

app.use(express.json());
app.use(morgan('tiny'));
app.use('/', home_router);
app.use('/api/genres', genre_router);
app.use('/api/customers', customers);
app.use('/api/movies', movies);
app.use('/api/rentals', rentals);
app.use('/api/users', users);
app.use('/api/auth', auth);
app.use(helmet());
app.use(compression());
//app.use(error);

connectToMongo();

async function connectToMongo() {
    try {
        const result = await mongoose.connect(config.get("db"));
        console.log("Connected to MongoDB");
    } catch (e) {
        console.log("Could not connect to MongoDB");
        console.log(e.message)
        winston.log('error', e.message);
        process.exit(); // Terminates the app.listen running loop
        
    }
}

// Reason why program doesnt exit after failure to connect to DB is because
// both connectToMongo() and app.listen are async , and app.listen keeps on
// listening for connections even after async connect to mongo fails.

const PORT = process.env.PORT || 5000;
app.listen(PORT, function () {
    //console.log(`Listening to PORT ${PORT}`, `Visit:
    // http://localhost:${PORT}`);
    winston.info("Server Started");
    
});