app.js

require("dotenv/config");
const path = require("path");

const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const session = require("express-session");
const helmet = require("helmet");
const compression = require("compression");
const cookieParser = require("cookie-parser");
const morgan = require("morgan");
const csrf = require("csurf");
const flash = require("connect-flash");

const MongoDBStore = require("connect-mongodb-session")(session);

const MONGODB_URI = `mongodb://${process.env.MONGODB_HOST_NAME}:${process.env.MONGODB_PORT}/${process.env.MONGODB_NAME}`;

const app = express();

const indexRoutes = require("./routes/index");
const errorController = require("./controllers/error.controllers");
const fileUploader = require("./middleware/fileUploader");

app.set("view engine", "ejs");
app.set("views", "views");

app.use(bodyParser.json({ limit: "5mb" }));
app.use(
  bodyParser.urlencoded({ limit: "5mb", extended: true, parameterLimit: 5000 })
);

app.use(fileUploader);

app.use(express.static(path.join(__dirname, "public")));

app.use(helmet());
app.use(compression());
app.use(flash());
app.use(morgan(process.env.NODE_ENV === "production" ? "combined" : "dev"));

const PORT = Number(process.env.PORT) || 3000;

const store = new MongoDBStore({
  uri: MONGODB_URI,
  collection: "sessions",
});

app.use(cookieParser());

app.use(
  session({
    secret: process.env.SESSION_SECRET,
    resave: false,
    saveUninitialized: false,
    store: store,
    cookie: {
      maxAge: 600000,
      expires: 1800000,
    },
  })
);

const csrfProtection = csrf();

app.use(csrfProtection);

app.use((req, res, next) => {
  res.locals.csrfToken = req.csrfToken();
  res.locals.errorMessage = req.flash("errorMessage");
  next();
});

app.use(indexRoutes);
app.get("/500", errorController.get500);
app.use(errorController.get404);
app.use((error, req, res, next) => {
  console.log(error);
  res.redirect("/500");
});

mongoose
  .connect(MONGODB_URI, {
    useCreateIndex: true,
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then((result) => {
    mongoose.set("debug", true);
    app.listen(PORT, () => {
      console.log("SERVER RUNNING ON PORT", PORT);
    });
  })
  .catch((err) => {
    console.log(err);
  });