app.js

const socketio = require('socket.io');
const path = require("path");
const express = require("express");
const http = require("http");
const app = express();
const server = http.createServer(app);
const io = socketio(server);
const port = process.env.PORT || 80;
const views_path = path.join(__dirname, "/views");
const static_path = path.join(__dirname, "/static");
const { joinUser, getCurrentUser, userLeave, roomUsers } = require("./utilities/user");
const { join } = require('path');

//* Static folder

app.use("/static", express.static(static_path));

//* view engine

app.set('view engine', 'ejs');
app.set("views", views_path);

//* Get 

app.get("/", (req, res) => {
    res.status(200).render("index.ejs");
});

app.get("/chatroom", (req, res) => {
    res.status(200).render("chat.ejs");
});



//* Web socket

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

    //* Join room
    socket.on("join-chat-room", ({ username, room }) => {

        const user = joinUser(socket.id, username, room);
        socket.join(user.room);


        //* Bot msg
        socket.emit("bot", { msg: "Welcome to Leucos !", position: "middle" });

        socket.broadcast.to(user.room).emit("bot", { msg: `${user.username} joined the room`, position: "middle" });

        //* User and room info
        io.to(user.room).emit("room-users", {
            room: user.room,
            users: roomUsers(user.room)
        })
    });

    //* User msg    
    socket.on("chat-msg", (msg) => {
        const user = getCurrentUser(socket.id);
        const username = user.username;
        socket.broadcast.to(user.room).emit("message", { msg, position: "left", username });
        socket.emit("receive", { msg, position: "right", username: "You" });
    });

    //* Disconnect
    socket.on("disconnect", () => {
        const user = userLeave(socket.id);
        if (user) {
            socket.broadcast.to(user.room).emit("bot", { msg: `${user.username} left the room`, position: "middle" });

            //* User and room info
            io.to(user.room).emit("room-users", {
                room: user.room,
                users: roomUsers(user.room)
            })
        }
    });
});

//* listen
server.listen(port, () => {
    console.log(`The application started successfully on port ${port}`);
});