app.js

//jshint esversion:6
require("dotenv").config();
const express = require("express");
const bodyParser = require("body-parser");
const ejs = require("ejs");
const mongoose = require("mongoose");
const bcrypt = require("bcrypt");
const saltRounds = 10;

const app = express();

app.use(express.static("public"));
app.set("view engine", "ejs");

app.use(bodyParser.urlencoded({ extended: true }));

// mongoose.connection //
main().catch((err) => console.log(err));
async function main() {
  await mongoose.connect("mongodb://127.0.0.1:27017/userDB");
}

const userSchema = new mongoose.Schema({
  email: String,
  password: String,
});

const user = new mongoose.model("User", userSchema);

app.get("/", function (req, res) {
  res.render("home");
});

app.get("/register", function (req, res) {
  res.render("register");
});

app.get("/login", function (req, res) {
  res.render("login");
});

app.post("/register", function (req, res) {
  bcrypt.hash(req.body.password, saltRounds, function (err, hash) {
    // Store hash in your password DB.
    const newUser = new user({
      email: req.body.username,
      password: hash
    });

    newUser
      .save({})
      .then(function () {
        res.render("secrets");
      })
      .catch(function (err) {
        console.log(err);
      });
  });
});

app.post("/login", function (req, res) {
  const username = req.body.username;
  const password = req.body.password;

  user.findOne({ email: username }).then((foundUser, err) => {
    if (foundUser) {
      if (foundUser) {
        bcrypt.compare(password, foundUser.password, function(err, result) {
            // result == true
            if(result=== true) {
                res.render("secrets");
            }
        }); 
      }
    } else {
      console.log(err);
    }
  });
});

app.listen(3000, function (req, res) {
  console.log("server is running!");
});