concord/concord-server/src/index.ts

import { Hono } from 'hono'
import { cors } from 'hono/cors'
import { Server as Engine } from '@socket.io/bun-engine'
import { Server } from 'socket.io'
import routes from './routes/index'

//initialize socket.io server
const io = new Server()

//initialize bun engine
//then bind to socket.io server
const engine = new Engine()
io.bind(engine)

io.on('connection', (socket) => {

    //get userId and clientId from query params
    const userId = socket.handshake.query.userId;
    const clientId = socket.handshake.query.clientId;
    if(!userId || Array.isArray(userId)){
        socket.disconnect();
        throw new Error('Invalid user ID');
    }

    if(!clientId || Array.isArray(clientId)){
        socket.disconnect()
        throw new Error('Invalid client ID')
    }

    socket.join(userId)
    console.log(`User ${userId} connected. Client ID ${clientId} on socket ${socket.id}`);

    socket.on('disconnect', () => {
        console.log(`User ${userId} disconnected from socket ${socket.id}`);
    });
});

const app = new Hono()

app.use('*', cors({
    origin: 'http://localhost:5173',
    allowHeaders: ['Content-Type', 'Authorization'],
    allowMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
    credentials: true
}))
app.use(routes)






export default app