app.js

require("dotenv").config();
const express = require("express");
const mongoose = require("mongoose");
const path = require("path");
require("./src/conn.js");
const students = require("./src/db/studentdataschema.js");
const studentpass = require("./src/db/studentpassschema.js");
const { error } = require("console");
const bcrypt = require("bcrypt");

// use('collegeDB');
// const studentauthentications = require('./studentPasswordSchema.js');
const PORT = process.env.PORT || 5000;

const app = express();

app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));

app.use(express.json());
app.use(express.urlencoded()); // this is basically to decode data send through html page

const route = express.Router();
const frontend = path.join(__dirname, "public");
console.log(frontend);

// Middleware for parsing request body
// app.use(bodyParser.urlencoded({ extended: true }));
// app.use(bodyParser.json());
app.use(express.static(frontend));

// Middleware for logging requests

const reqFilter = (req, resp, next) => {
  // console.log(`Request made to ${req.url} with method ${req.method}`);
  next();
};

app.use(reqFilter);
//API GET ROUTS
app.get("", (req, resp) => {
  resp.sendFile(`${frontend}/index.html`);
});
app.get("/about", (req, resp) => {
  resp.sendFile(`${frontend}/html/about.html`);
});
app.get("/contact", (req, resp) => {
  resp.sendFile(`${frontend}/html/contact.html`);
});
app.get("/help", (req, resp) => {
  resp.sendFile(`${frontend}/html/help.html`);
});
app.get("/blog", (req, resp) => {
  resp.sendFile(`${frontend}/html/blog.html`);
});
app.get("/courses", (req, resp) => {
  resp.sendFile(`${frontend}/html/courses.html`);
});
app.get("/studentlogin", (req, resp) => {
  resp.sendFile(`${frontend}/html/stdntlgn.html`);
});
app.get("/student-signup", (req, resp) => {
  resp.sendFile(`${frontend}/html/signup.html`);
});
app.get("/register", (req, resp) => {
  resp.render(`registration`); //rendering registration.ejs file
});
app.get("/forgotpassword", (req, resp) => {
  resp.render(`forgotpass`); //rendering forgotpass.ejs file
});
app.get("/home", (req, resp) => {
  resp.render(`home`); //rendering home.ejs file
});
app.get("/deshboard", (req, resp) => {
  resp.render(`deshboard`); //rendering deshboard.ejs file
});
app.get("/attendance", (req, resp) => {
  resp.render(`attendance`); //rendering attendance.ejs file
});
app.get("/user", (req, res) => {
  // Replace with logic to get user data based on session or login
  const user = users[0];
  res.render("user", { user: user, announcements: announcements });
});

// .......................Node.js code to handle form submissions and save data to MongoDB:................................

app.post("/register", async (req, res) => {
  let studentdata = new students(req.body);
  console.log(studentdata);
  let result = await studentdata.save();
  // Render the registration success page with the registration number
  // res.render('registration', { RegistrationNo: studentdata.RegistrationNo });
});

// app.post('/update', async (req, res) => {
//     const username = req.body.username;
//     const user = await studentpass.findOne({username});
//     if (user) {
//         res.status(409).json({ error: "User exist redirecting to login page" });
//     }else{
//         let studentPassword = new studentpass(req.body);
//     let result = await studentPassword.save();
//     res.status(200).json({ message: "Password updated redirecting to login page" });
//     // Render the registration success page with the registration number
//     // res.render('registration', { RegistrationNo: studentdata.RegistrationNo });
//     }
// });

app.post("/update", async (req, res) => {
  const { username, password } = req.body;

  try {
    // Check if the user already exists
    const existingUser = await studentpass.findOne({ username });

    if (existingUser) {
      return res
        .status(409)
        .json({ error: "User already exists. Redirecting to login page" });
    }

    // Hash the password
    const hashedPassword = await bcrypt.hash(password, 10); // 10 is the salt rounds

    // Create a new studentpass document with hashed password
    const newStudentPassword = new studentpass({
      username: username,
      password: hashedPassword,
    });

    // Save the new studentpass document
    await newStudentPassword.save();

    return res.status(200).json({
      message:
        "Shabhash mere sher! Password updated. Redirecting to login page",
    });
  } catch (error) {
    console.error("Error:", error);
    return res
      .status(500)
      .json({ error: "Internal server error,  Hey Prabhu! Ye kya hua?" });
  }
});

// app.post('/login', async (req, res) => {
//     const { username, password } = req.body;
//     try {
//         // Check if the user exists in the database
//         const user = await studentpass.findOne({username});
// // console.log(user.password === password && user.username == username);

//         if (user) {
//             if(user.username == username && user.password === password){
//             // User found, grant access to home page
//             res.status(200).json({ message: "Login successful" , redirectTo: "/home"});
//             }else if(user.username == username && user.password !== password){

//                 // Password does not match, return error message
//                 res.status(401).json({ error: "Wrong password" });
//             }else {
//                 // User not found, return error message
//                 res.status(404).json({ error: "User not found" });
//             }
//         }
//     } catch (error) {
//         // Error occurred during database query
//         res.status(500).json({ error: "Internal server error" });
//     }
// });

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

  try {
    // Check if the user exists in the database
    const user = await studentpass.findOne({ username });

    if (user) {
      // Compare hashed password
      const isPasswordMatch = await bcrypt.compare(password, user.password);

      if (isPasswordMatch) {
        // Passwords match, grant access to home page
        return res
          .status(200)
          .json({ message: "Login successful", redirectTo: "/home" });
      } else {
        // Password does not match, return error message
        // return res.status(401).json({ error: "Wrong username or password" });
        return res.status(401).json({
          error:
            "Wrong password 😏 Ex ka number yad rehta hai tumhe, par apna password nahi",
        });
      }
    } else {
      // User not found, return error message
      return res.status(404).json({ error: "User not found" });
    }
  } catch (error) {
    // Error occurred during database query
    console.error("Error:", error);
    return res
      .status(500)
      .json({ error: "Internal server error, Hey Prabhu! Ye kya hua?" });
  }
});

// ........................................................................................

// Replace with your database connection and data fetching logic
// const users = [
//   {
//     name: "John Doe",
//     studentID: "123456",
//     email: "john.doe@college.edu",
//     program: "Computer Science",
//     classes: [
//       { code: "CSC101", name: "Introduction to Programming", day: "M/W/F", time: "10:00 AM" },
//       { code: "MATH120", name: "Calculus I", day: "T/Th", time: "2:00 PM" },
//     ],
//   },
// ];

// const announcements = [
//   { title: "Important Update: Online Exam Schedule", date: "2024-05-10", message: "The online exam schedule for the upcoming semester has been released. Please check your email for details." },
//   { title: "Library Resources for Research Projects", date: "2024-05-08", message: "The library offers a wide range of resources for your research projects. Attend our workshop on effective research strategies on May 15th." },
// ];

// Start the servern
app.use("/", route);
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});

// ---------FOLDER STRUCTURE -------

// EDUFOLDER/
// │
// ├
// │
// ├── Server/            (Backend-related code)
// │   ├── node_modules/  (Auto-generated by npm/yarn)
// │   ├── src/           (Backend source code)
// │   │   ├── db/        (Database related files)
// │   │   ├── models/    (Database models)
// │   │   └── app.js     (Main backend file)
// │   |   |___ config.js (Database configuration)
// │   |   |___ studentdataschema.js (Schema for student data)
// │   ├── .gitignore     (Git ignore file for backend)
// │   ├── package.json   (Backend dependencies and scripts)
// │   └── ...            (Other backend-related files)
// │
// └── src/               (Frontend-related code)
// |    ├── frontend/      (Frontend source code)
// |    │   ├── API/       (API related files)
// |    │   ├── images/    (Images used in frontend)
// |    │   ├── html/      (HTML files for frontend)
// |    │   ├── css/       (CSS stylesheets)
// |    │   └── index.js   (Entry point for frontend)
// |    ├── .gitignore     (Git ignore file for frontend)
// |    ├── package.json   (Frontend dependencies and scripts)
// |    └── ...            (Other frontend-related files)
// |
// ├──  views/            (EJS files)