index.js

// Express async error handler middleware
require("express-async-errors");

// Loading enviroment variables
require("dotenv").config();

// Requirements
const express = require("express");
const cors = require("cors");
const io = require("socket.io");
const fileUpload = require("express-fileupload");
const cookieParser = require("cookie-parser");

// Routes
const authenticationRoutes = require("./routes/authentication");
const roomRoutes = require("./routes/room");
const messageRoutes = require("./routes/message");
const userRoutes = require("./routes/user");

// Middleware
const errorHandlerMiddleware = require("./middleware/errorHandler");
const authorizationMiddleware = require("./middleware/authorization");

// Connecting to db
require("./database/connect");

// Global instances
const app = express();
const PORT = process.env.PORT | 8000;

// Middleware
app.use(cookieParser());
app.use(cors({
    credentials: true,
    origin: "http://localhost:3000"
}));
app.use(express.json({ limit: "50mb" }));
app.use(fileUpload());

// Routing
app.use("/api/v1/auth", authenticationRoutes);
app.use("/api/v1/room", authorizationMiddleware, roomRoutes);
app.use("/api/v1/message", authorizationMiddleware, messageRoutes);
app.use("/api/v1/user", authorizationMiddleware, userRoutes);

// Error handling middleware
app.use(errorHandlerMiddleware);

// Init
const server = app.listen(PORT, () => {
    console.log(`Application is listening on port ${PORT}...`);
});

// Initializing socket connection
const socket = io(server, {
    cors: {
        origin: "*"
    }
});

require("./routes/websocket")(socket);