Added a better error handling

errors/DefaultError.js

@@ -0,0 +1,19 @@
+class DefaultError extends Error {
+    constructor(code, message, cause, name) {
+        super(message)
+        this.code = code
+        this.name = name || "DefaultError"
+        this.cause = cause || "Internal Server Error"
+        this.message = message || "Internal Server Error"
+        this.isOperational = true
+    }
+
+    serialize() {
+        return {
+            code: this.code,
+            message: this.message
+        }
+    }
+}
+
+module.exports = DefaultError

routes/register.js

@@ -2,10 +2,18 @@ const express = require("express")
 const router = express.Router()
 const registerService = require("../services/register")
 
-router.post("/", async (req, res) => {
+router.post("/", async (req, res, next) => {
+    try {
         const { email, username, password } = req.body
         const registerResult = registerService.register({ email, username, password })
-    return res.status(registerResult.code).json(registerResult)
+        return res.status(200).json({
+            code: 200,
+            message: "User successfully registered",
+            data: registerResult
+        })
+    } catch (error) {
+        next(error)
+    }
 })
 
 module.exports = router

server.js

@@ -96,6 +96,21 @@ for (const route of routes) {
     }
 }
 
+app.use((err, req, res, next) => {
+    const statusCode = err.statusCode || 500
+
+    logger.error(err.message, ["API", "red"])
+
+    if (typeof err.serialize === "function") {
+        return res.status(statusCode).json(err.serialize())
+    }
+
+    return res.status(500).json({
+        status: "error",
+        message: "Internal Server Error"
+    })
+})
+
 app.listen(process.env.WEB_PORT || 3000, () => {
     logger.log(`Server listening at port : ${process.env.WEB_PORT || 3000}`, ["WEB", "yellow"])
 })

services/register.js

@@ -1,22 +1,15 @@
 const crypto = require("node:crypto")
+const DefaultError = require("../errors/DefaultError")
 
 function register({ email, username, password }) {
     if (true) {
         return {
-            code: 200,
-            message: "User successfully registered",
-            data: {
             id: crypto.randomUUID(),
             username: username,
             email: email
         }
-        }
     } else {
-        return {
+        throw new DefaultError(418, "I'm a teapot", "", "TeaPotExeception")
-            code: 418,
-            error: "I'm a tea pot",
-            message: "Error occured",
-        }
     }
 }