server.js

const express = require('express')
const path = require('path')
const http = require('http')
const socketio = require('socket.io')
const moment = require('moment')

const app = express();
const server = http.createServer(app);
const io = socketio(server);

const PORT = 3000 || process.env.PORT;
const chatBot = "Chat Bot"
// set path for public folder to server static files

app.use(express.static(path.join(__dirname, 'public')))

const {
    userJoin,
    getCurrentUser,
    userLeave,
    getRoomUsers,
} = require("./utils/user");


io.on('connection', socket => {
    socket.on("joinRoom", ({ username, room }) => {
        const user = userJoin(socket.id, username, room);

        socket.join(user.room);

        // Welcome current user
        socket.emit("message", formatMessage(chatBot, "Welcome to ChatCord!"));

        // Broadcast when a user connects
        socket.broadcast
            .to(user.room)
            .emit(
                "message",
                formatMessage(chatBot, `${user.username} has joined the chat`)
            );

        // Send users and room info
        io.to(user.room).emit("roomUsers", {
            room: user.room,
            users: getRoomUsers(user.room),
        });
    });

    // Listen for chatMessage
    socket.on("chatMessage", (msg) => {
        const user = getCurrentUser(socket.id);

        io.to(user.room).emit("message", formatMessage(user.username, msg));
    });

    // Runs when client disconnects
    socket.on("disconnect", () => {
        const user = userLeave(socket.id);

        if (user) {
            io.to(user.room).emit(
                "message",
                formatMessage(chatBot, `${user.username} has left the chat`)
            );

            // Send users and room info
            io.to(user.room).emit("roomUsers", {
                room: user.room,
                users: getRoomUsers(user.room),
            });
        }
    });

})


server.listen(PORT, () => console.log(`Running on port ${PORT}`))

function formatMessage(username, text) {
    return {
        username,
        text,
        time: moment().format('h:mm a')
    }
}