Work in progress: authentication APIs ⚒

server/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
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+
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+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
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+.pnp.*

server/app.js

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+// Import packages
+const dotenv = require('dotenv');
+const express = require('express');
+const cors = require('cors');
+const connectDB = require('./config/db');
+const authRoutes = require('./routes/auth');
+
+// configure environment variables
+dotenv.config();
+
+// Express Instance
+const app = express();
+const port = process.env.PORT || 5000;
+
+// Set up middlewares
+app.use(express.json());
+app.use(cors());
+
+// Database connection
+connectDB();
+
+// routes
+app.get('/api/v1', (req, res) => {
+  return res.status(200).json({
+    status: true,
+    message: 'Welcome to the API',
+  });
+});
+app.use('/api/v1/auth', authRoutes);
+
+app.listen(port, () => {
+  console.log(`Server running on http://localhost:${port}`);
+});

server/config/db.js

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+const mongoose = require('mongoose');
+
+const connectDB = async () => {
+  try {
+    const conn = await mongoose.connect(process.env.MONGO_URL, {
+      useNewUrlParser: true,
+      useUnifiedTopology: true,
+    });
+    if (conn) console.log('MongoDB Connected');
+  } catch (err) {
+    console.log(err);
+  }
+};
+
+module.exports = connectDB;

server/controllers/auth.js

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+const bcrypt = require('bcrypt');
+const generateToken = require('../helpers/generateToken');
+const User = require('../models/User');
+
+exports.signup = async (req, res) => {
+  try {
+    const { username, email, password } = req.body;
+
+    // Check if the email already exists
+    const existingUser = await User.findOne({ email });
+    if (existingUser) {
+      return res.status(400).json({
+        status: false,
+        message: 'Username already exists',
+      });
+    }
+
+    // Hash the password
+    const hashedPassword = await bcrypt.hash(password, 10);
+
+    // Create a new user
+    const newUser = new User({ username, email, password: hashedPassword });
+    await newUser.save();
+
+    // Generate and send JWT token
+    const token = generateToken(newUser);
+    return res.status(201).json({
+      token,
+      status: true,
+      message: 'Successfully signed up!',
+    });
+  } catch (error) {
+    console.log(error);
+    res.status(500).json({
+      status: false,
+      error: error.message,
+      message: 'Internal server error',
+    });
+  }
+};
+
+exports.login = async (req, res) => {
+  try {
+    const { email, password } = req.body;
+
+    // find the user
+    const user = await User.findOne({ email });
+
+    // if no user exists
+    if (!user) {
+      return res.status(401).json({
+        status: false,
+        message: `User doesn't exists!`,
+      });
+    }
+
+    // Compare passwords
+    const isPasswordValid = await bcrypt.compare(password, user.password);
+    if (!isPasswordValid) {
+      return res.status(401).json({
+        status: false,
+        message: 'Invalid credentials',
+      });
+    }
+
+    // Generate and send JWT token
+    const token = generateToken(user);
+    res.json({ token });
+  } catch (error) {
+    console.log(error);
+    return res.status(500).json({
+      status: false,
+      message: `Internal server error`,
+      error,
+    });
+  }
+};

server/helpers/generateToken.js

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+const jwt = require('jsonwebtoken');
+
+// Generate JWT token
+function generateToken(user) {
+  const payload = {
+    id: user._id,
+    username: user.username,
+  };
+
+  return jwt.sign(payload, process.env.JWT_SECRET, { expiresIn: '1d' });
+}
+
+module.exports = generateToken;

server/models/User.js

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+const mongoose = require('mongoose');
+
+const userSchema = new mongoose.Schema(
+  {
+    username: {
+      type: String,
+      required: true,
+    },
+    email: {
+      type: String,
+      required: true,
+    },
+    password: {
+      type: String,
+      required: true,
+    },
+  },
+  { timestamps: true }
+);
+
+// Create a user model
+const User = mongoose.model('User', userSchema);
+
+module.exports = User;