index.js

// Import required libraries/modules
const express = require("express");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const dotenv = require("dotenv");
const path = require("path");

// Create an instance of Express
const app = express();
dotenv.config(); // Load environment variables again (repeated)

// Define the port where the server will listen
const port = process.env.PORT || 3000;

// Retrieve MongoDB connection details from environment variables
const username = process.env.MONGODB_USERNAME || "";
const password = process.env.MONGODB_PASSWORD || "";
const dbname = process.env.MONGODB_DBNAME || "";

// console.log('-----------------------------------------------------------------')
// console.log("Username:", username);
// console.log("Password:", password);
// console.log("Database:", dbname);
// console.log('-----------------------------------------------------------------')


// Connect to MongoDB using mongoose
mongoose.connect(
  `mongodb+srv://${username}:${password}@cluster0.j4relx6.mongodb.net/${dbname}?retryWrites=true&w=majority`
);
// Define the schema for user registration
const registrationSchema = new mongoose.Schema({
  name: String,
  email: String,
  password: String,
  number: String,
});

// Create a model based on the registration schema
const Registration = mongoose.model("Registration", registrationSchema);

// Configure Express to use bodyParser for parsing request bodies
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

// Middleware for serving static files from the 'public' directory
app.use(express.static(path.join(__dirname, "public")));

// Define routes
// Home page route
app.get("/", (req, res) => {
  res.sendFile(__dirname + "/index.html");
});

// Registration page route
app.get("/registerPage", (req, res) => {
  res.sendFile(__dirname + "/pages/index.html");
});

// Login Page route
app.get("/loginPage", (req, res) => {
  res.sendFile(__dirname + "/pages/login.html");
});

// Registration endpoint
app.post("/register", async (req, res) => {
  try {
    const { name, email, password, number } = req.body;

    // Check if the user with the given email already exists
    const existingUser = await Registration.findOne({ email });

    if (!existingUser) {
      // If user doesn't exist, create a new registration and save it
      const registrationData = new Registration({
        name,
        email,
        password,
        number,
      });
      await registrationData.save();
      console.log("Regstration successful");
      return res.redirect("/success");
    } else {
      // If user already exists, redirect to an error page
      console.log("User already exists");
      return res.redirect("/error");
    }
    
  } catch (error) {
    // Handle any errors during registration
    console.log(error);
    return res.redirect("/error");
  }
});
app.post("/login", async (req, res) => {
  try {
    const { email, password } = req.body;

    // Check if the user with the given email and password exists
    const existingUser = await Registration.findOne({ email, password });

    if (existingUser) {
      // If user exists, redirect to success page (you can customize this)
      return res.redirect("/");
    } else {
      // If user doesn't exist or password is incorrect, redirect to error page
      console.log("Invalid email or password");
      return res.redirect("/error");
    }
  } catch (error) {
    // Handle any errors during login
    console.log(error);
    return res.redirect("/error");
  }
});

// Success page route
app.get("/success", (req, res) => {
  res.sendFile(__dirname + "/pages/success.html");
});

// Resume page route
app.get("/resume", (req, res) => {
  res.sendFile(__dirname + "/resume.html");
});

// Error page route
app.get("/error", (req, res) => {
  res.sendFile(__dirname + "/pages/error.html");
});

// Route to serve the main CSS file
app.get("/all-styles", (req, res) => {
  res.sendFile(__dirname + "/public/css/main.css");
});

// Start the server and listen on the specified port
app.listen(port, () => {
  console.log(`Server is running http://localhost:${port}`);
});