nodly/templates/config/sockets/socketIO.js

Nodly is an interactive CLI for scaffolding modern Node.js/Express.js backend projects with instant setup for databases, mailers, queues, sockets, and more. Skip boilerplate and start building features fast.

import { Server } from "socket.io";

let io;

export const initSocketIO = (server) => {
  io = new Server(server, {
    cors: {
      origin: "*",
      methods: ["GET", "POST"],
    },
  });

  io.on("connection", (socket) => {
    console.log(`New client connected: ${socket.id}`);

    socket.on("disconnect", () => {
      console.log(`Client disconnected: ${socket.id}`);
    });

    // Example custom event
    socket.on("send-message", (data) => {
      console.log("Message received:", data);
      io.emit("receive-message", data);
    });
  });

  return io;
};

export const getIO = () => {
  if (!io) {
    throw new Error(
      "Socket.io not initialized. Call initSocketIO(server) first."
    );
  }
  return io;
};