app.js

require("dotenv").config();
require('./config/db').connect();
const express = require("express");

const app = express();

app.use(express.json());

app.post("/register", async (req, res) => {

    try {
        // Get user input
        const { first_name, last_name, email, password } = req.body;

        // Validate user input
        if (!(email && password && first_name && last_name)) {
            res.status(400).send("All input is required");
        }

        // check if user already exist
        // Validate if user exist in our database
        const oldUser = await User.findOne({ email });

        if (oldUser) {
            return res.status(409).send("User Already Exist. Please Login");
        }

        //Encrypt user password
        encryptedPassword = await bcrypt.hash(password, 10);

        // Create user in our database
        const user = await User.create({
            first_name,
            last_name,
            email: email.toLowerCase(), // sanitize: convert email to lowercase
            password: encryptedPassword,
        });

        // Create token
        const token = jwt.sign(
            { user_id: user._id, email },
            process.env.TOKEN_KEY,
            {
                expiresIn: "2h",
            }
        );
        // save user token
        user.token = token;

        // return new user
        res.status(201).json(user);
    } catch (err) {
        console.log(err);
    }

});

app.post("/login", async (req, res) => {

  // Our login logic starts here
  try {
    // Get user input
    const { email, password } = req.body;

    // Validate user input
    if (!(email && password)) {
      res.status(400).send("All input is required");
    }
    // Validate if user exist in our database
    const user = await User.findOne({ email });

    if (user && (await bcrypt.compare(password, user.password))) {
      // Create token
      const token = jwt.sign(
        { user_id: user._id, email },
        process.env.TOKEN_KEY,
        {
          expiresIn: "2h",
        }
      );

      // save user token
      user.token = token;

      // user
      res.status(200).json(user);
    }
    res.status(400).send("Invalid Credentials");
  } catch (err) {
    console.log(err);
  }
  // Our register logic ends here
});

const auth = require("./middleware/auth");

app.post("/welcome", auth, (req, res) => {
  res.status(200).send("Welcome 🙌 ");
});

module.exports = app;