const express = require("express");

const app = express();
const http = require("http");
const server = http.createServer(app);
const io = require("socket.io")(server);

usersConnected = 0

io.on("connection", (client) => {
    
    usersConnected++;

    client.on("disconnect", () => {
        usersConnected--;
        io.sockets.emit("update-count", {value: usersConnected});
    });

    io.sockets.emit("update-count", {value: usersConnected});
});  

server.listen(3000, () => {
    console.log("Server started on port 3000");
});