server.js

const http = require("http");
const express = require("express");
const socketio = require("socket.io");
const formatMessage = require("./utils/messages");
const {userJoin, getCurrentUser, userLeave, getRoomUsers} = require("./utils/users");

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

// Set static folder
app.use(express.static("public"));

const botName = "ChatCord Bot";

// Run when a client connects
io.on("connection", function(socket) {
    socket.on("joinRoom", ({username, room}) => {
        const user = userJoin(socket.id, username, room);

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

        // Broadcast when a user connects
        socket.broadcast.to(user.room).emit("message", formatMessage(botName, `${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 to chatMessage
    socket.on("chatMessage", function(msg) {
        const user = getCurrentUser(socket.id);

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

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

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

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

});

const PORT = 3000 || process.env.PORT;

server.listen(PORT, function() {
    console.log("The server is running on port 3000.")
});