added example controller and error handling

src/server/controllers/hello.ts

@@ -0,0 +1,11 @@
+import { NextFunction, Request, Response, Router } from "express";
+
+export const helloRouter = Router();
+
+helloRouter.get("/hello", (_req: Request, res: Response, next: NextFunction) => {
+	try {
+		res.json({ message: "hello from bun!" });
+	} catch (error) {
+		next(error);
+	}
+});

src/server/controllers/index.ts

@@ -0,0 +1 @@
+export * from "./hello";

src/server/index.ts

@@ -6,7 +6,9 @@ import { createServer } from "http";
 import nocache from "nocache";
 import path from "path";
 
+import { helloRouter } from "@controllers";
 import { Config } from "@helpers";
+import { errorHandler, notFound } from "@middleware";
 import { connectToDatabase, initSocket, log } from "@services";
 
 const { IS_PROD, HOST, PORT, RELOAD_PORT, SKIP_DB } = Config;
@@ -47,12 +49,15 @@ app.use(compression());
 app.use(
 	cors({
 		origin: "*",
-		methods: ["GET"]
+		methods: ["GET", "HEAD", "PUT", "PATCH", "POST", "DELETE"]
 	})
 );
 app.use(express.static(PUBLIC_DIR));
 app.set("json spaces", 2);
 app.disable("x-powered-by");
+app.use(helloRouter);
+app.use(notFound);
+app.use(errorHandler);
 const httpServer = createServer(app);
 initSocket(httpServer);
 httpServer.listen(PORT, () => {

src/server/middleware/errorHandler.ts

@@ -0,0 +1,10 @@
+import { NextFunction, Request, Response } from "express";
+
+import { CustomError } from "@types";
+
+export const errorHandler = (error: Error | CustomError, req: Request, res: Response, next: NextFunction) => {
+	if (!error) return next();
+	const statusCode = error instanceof CustomError ? error.statusCode : res.statusCode !== 200 ? res.statusCode : 500;
+	const errorMessage = (typeof error === "string" ? error : error.message) || "Internal Server Error";
+	res.status(statusCode).json({ error: errorMessage });
+};

src/server/middleware/index.ts

@@ -0,0 +1,2 @@
+export * from "./errorHandler";
+export * from "./notFound";

src/server/middleware/notFound.ts

@@ -0,0 +1,5 @@
+import { Request, Response } from "express";
+
+export const notFound = (_req: Request, res: Response) => {
+	res.status(404).json({ message: "Not Found" });
+};

src/server/types/index.ts

@@ -21,3 +21,13 @@ export type TUser = {
 
 type ReverseMap<T> = T[keyof T];
 export type TSocketEvent = ReverseMap<typeof SocketEvent>;
+
+export class CustomError extends Error {
+	statusCode: number;
+
+	constructor(message: string, statusCode: number) {
+		super(message);
+		this.statusCode = statusCode;
+		Object.setPrototypeOf(this, CustomError.prototype);
+	}
+}