Add complete multiplayer system with real-time gameplay, challenge system, and 50x50 board option

server.js

@@ -0,0 +1,122 @@
+const express = require('express');
+const http = require('http');
+const socketIO = require('socket.io');
+const cors = require('cors');
+const path = require('path');
+const { initializeDatabase, db } = require('./database');
+const GameManager = require('./gameManager');
+
+const app = express();
+const server = http.createServer(app);
+const io = socketIO(server, {
+    cors: {
+        origin: "*",
+        methods: ["GET", "POST"]
+    }
+});
+
+const PORT = process.env.PORT || 3000;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+app.use(express.static(path.join(__dirname)));
+
+// Serve index.html for root route
+app.get('/', (req, res) => {
+    res.sendFile(path.join(__dirname, 'index.html'));
+});
+
+// Initialize game manager
+const gameManager = new GameManager(io, db);
+
+// Socket.io connection handling
+io.on('connection', (socket) => {
+    console.log(`✅ Player connected: ${socket.id}`);
+    
+    // Player registration
+    socket.on('register_player', async (data) => {
+        const result = await gameManager.registerPlayer(socket, data.username);
+        socket.emit('registration_result', result);
+    });
+    
+    // Send challenge
+    socket.on('send_challenge', async (data) => {
+        const result = await gameManager.sendChallenge(socket, data.targetUsername, data.boardSize);
+        socket.emit('challenge_result', result);
+    });
+    
+    // Accept challenge
+    socket.on('accept_challenge', async (data) => {
+        const result = await gameManager.acceptChallenge(socket, data.challengeId);
+        if (result.success) {
+            socket.emit('challenge_accepted', result);
+        } else {
+            socket.emit('challenge_error', result);
+        }
+    });
+    
+    // Decline challenge
+    socket.on('decline_challenge', (data) => {
+        gameManager.declineChallenge(socket, data.challengeId);
+    });
+    
+    // Make move
+    socket.on('make_move', async (data) => {
+        const result = await gameManager.handleMove(socket, data);
+        socket.emit('move_result', result);
+    });
+    
+    // Heartbeat to keep session alive
+    socket.on('heartbeat', async () => {
+        await gameManager.heartbeat(socket);
+    });
+    
+    // Request active players
+    socket.on('request_active_players', async () => {
+        const activePlayers = await db.getActivePlayers();
+        socket.emit('active_players_update', activePlayers);
+    });
+    
+    // Disconnect
+    socket.on('disconnect', async () => {
+        console.log(`❌ Player disconnected: ${socket.id}`);
+        await gameManager.handleDisconnect(socket);
+    });
+});
+
+// Cleanup stale sessions periodically
+setInterval(async () => {
+    await db.cleanupStaleSessions();
+}, 60000); // Every minute
+
+// Error handling
+process.on('unhandledRejection', (error) => {
+    console.error('Unhandled promise rejection:', error);
+});
+
+// Initialize database and start server
+async function startServer() {
+    try {
+        await initializeDatabase();
+        
+        server.listen(PORT, () => {
+            console.log('');
+            console.log('═══════════════════════════════════════════════════');
+            console.log('🎮 Connect-5 Multiplayer Server');
+            console.log('═══════════════════════════════════════════════════');
+            console.log(`🌐 Server running on port ${PORT}`);
+            console.log(`📡 WebSocket server ready`);
+            console.log(`🗄️  Database connected`);
+            console.log('');
+            console.log(`🎯 Open your browser to: http://localhost:${PORT}`);
+            console.log('═══════════════════════════════════════════════════');
+            console.log('');
+        });
+    } catch (error) {
+        console.error('Failed to start server:', error);
+        process.exit(1);
+    }
+}
+
+startServer();