server.js

const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
const bcrypt = require('bcrypt');

const app = express();
const PORT = process.env.PORT || 5000;

app.use(cors());
app.use(express.json());

mongoose.connect('mongodb://localhost:27017/login', {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});

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

const User = mongoose.model('User', userSchema);

app.post('/api/signup', async (req, res) => {
  try {
    const { username, password } = req.body;
    const hashedPassword = await bcrypt.hash(password, 10);
    const newUser = new User({ username, password: hashedPassword });
    await newUser.save();
    res.status(201).send('User created successfully');
  } catch (error) {
    console.error(error);
    res.status(500).send('Internal Server Error');
  }
});

app.post('/api/login', async (req, res) => {
  try {
    const { username, password } = req.body;
    const user = await User.findOne({ username });

    if (!user) {
      return res.status(404).send('User not found');
    }

    const passwordMatch = await bcrypt.compare(password, user.password);

    if (!passwordMatch) {
      return res.status(401).send('Invalid password');
    }

    res.status(200).send('Login successful');
  } catch (error) {
    console.error(error);
    res.status(500).send('Internal Server Error');
  }
});

app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});