server.js

const http = require('http');
const fs = require('fs');
const path = require('path');

const PORT = 8000;

const MIME_TYPES = {
  '.html': 'text/html',
  '.css': 'text/css',
  '.js': 'text/javascript',
  '.json': 'application/json',
  '.png': 'image/png',
  '.jpg': 'image/jpeg',
  '.gif': 'image/gif',
  '.svg': 'image/svg+xml',
  '.ico': 'image/x-icon',
  '.txt': 'text/plain',
  '.pdf': 'application/pdf'
};

const server = http.createServer((req, res) => {
  console.log(`Request: ${req.method} ${req.url}`);
  
  let filePath = path.join(__dirname, req.url === '/' ? 'loginPage.html' : req.url);
  
  // Security check to prevent directory traversal
  if (!filePath.startsWith(__dirname)) {
    res.writeHead(403, { 'Content-Type': 'text/plain' });
    res.end('403 Forbidden');
    return;
  }
  
  const extname = path.extname(filePath).toLowerCase();
  const contentType = MIME_TYPES[extname] || 'application/octet-stream';
  
  fs.readFile(filePath, (err, content) => {
    if (err) {
      if (err.code === 'ENOENT') {
        // File not found
        fs.readFile(path.join(__dirname, 'loginPage.html'), (err, content) => {
          if (err) {
            res.writeHead(500, { 'Content-Type': 'text/plain' });
            res.end('500 Internal Server Error');
          } else {
            res.writeHead(200, { 'Content-Type': 'text/html' });
            res.end(content, 'utf-8');
          }
        });
      } else {
        // Server error
        res.writeHead(500, { 'Content-Type': 'text/plain' });
        res.end(`500 Internal Server Error: ${err.code}`);
      }
    } else {
      // Success
      res.writeHead(200, { 'Content-Type': contentType });
      res.end(content, 'utf-8');
    }
  });
});

server.listen(PORT, () => {
  console.log(`SchoolFlow Hub server running at http://localhost:${PORT}/`);
  console.log('Press Ctrl+C to stop the server');
});