Hybrid Internet Access

app.post('/api/v1/auth/register', (req, res) => {
  const { device_id, public_key } = req.body;
  const apiKey = generateSecureApiKey(); // e.g., crypto.randomBytes(32)
  
  // Save to Database: [device_id, public_key, apiKey]
  
  res.json({ api_key: apiKey });
});

const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });

wss.on('connection', function connection(ws) {
  let isAuthenticated = false;
  let deviceId = null;

  ws.on('message', function incoming(data) {
    const payload = JSON.parse(data);

    // 1. Handle Authentication Frame
    if (payload.type === 'auth') {
      const user = verifyTokenInDatabase(payload.token);
      if (user) {
        isAuthenticated = true;
        deviceId = user.device_id;
        ws.send(JSON.stringify({ type: 'auth_success' }));
      } else {
        ws.close();
      }
      return;
    }

    // Require auth for all other frames
    if (!isAuthenticated) return;

    // 2. Handle Message Routing
    if (payload.type === 'message') {
      // Look up recipient's WebSocket connection and forward
      const recipientWs = activeConnections.get(payload.recipient_id);
      if (recipientWs) {
         recipientWs.send(JSON.stringify(payload));
      }
    }
  });
});

// File Chunking Logic
app.post('/api/v1/files/chunk', (req, res) => {
  const { message_id, chunk_index, total_chunks, chunk_data, is_last } = req.body;
  
  // Append base64 chunk_data to temp file
  appendChunkToTempFile(message_id, chunk_data);
  
  if (is_last) {
    assembleAndSaveFinalFile(message_id, total_chunks);
  }
  
  res.json({ success: true, chunk_index });
});