server.js

// Import node.js path module provides utilities for working with file and directory paths.
const path = require("path");

// Imports Express.js.
const express = require("express");

// Import express-session
const session = require("express-session");
const SequelizeStore = require("connect-session-sequelize")(session.Store);

// Import dotenv environment variables.
require("dotenv").config();

// Import the custom helper methods
const helpers = require("./util/helpers");

// Import express-handlebars
const exphbs = require("express-handlebars");
const hbs = exphbs.create({ helpers });

// Import the routes.
const routes = require("./controllers");

// Import the connection object: Sequelize connection.
const sequelize = require("./config/connection");

// Sets up the Express App
const app = express();
const PORT = process.env.PORT || 3001;

// Set up sessions with cookies
const sess = {
  secret: process.env.SESSION_PASSWORD,
  cookie: {
    maxAge: 1 * 60 * 60 * 1000, // 1 hour
    httpOnly: true,
    secure: false,
    sameSite: "strict",
  },
  resave: false,
  saveUninitialized: true,
  // Sets up session store where we will hold the cookie
  store: new SequelizeStore({
    db: sequelize,
  }),
};

// Set Handlebars.js as the default template engine.
app.engine("handlebars", hbs.engine);
app.set("view engine", "handlebars");

// Middleware to handle session.
app.use(session(sess));

// Middleware for parsing JSON and urlencoded form data.
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// Middleware pointing to the public directory (absolute path).
app.use(express.static(path.join(__dirname, "public")));

//Send all the requests that begin with / to the index.js in the routes folder.
app.use(routes);

// Synchronize sequelize models to the database before starting Express.js server, then turn on the server
sequelize.sync({ force: false }).then(() => {
  app.listen(PORT, () => console.log("Now listening!"));
});