feat: error handler middleware

src/presentation/middlewares/error-handler.middleware.ts

@@ -0,0 +1,42 @@
+import { NextFunction, Request, Response } from 'express';
+
+import { CustomAPIError } from '../../domain/errors';
+import { HttpCodes } from '../../config/http-status-codes.adapter';
+import { MulterError } from 'multer';
+
+/**
+ * Middleware class for handling errors.
+ */
+export class ErrorHandlerMiddleware {
+  /**
+   * Handles errors and sends appropriate responses.
+   */
+  static handle(err: Error, _req: Request, res: Response, _next: NextFunction) {
+    console.log({ err });
+
+    let message, statusCode;
+
+    // Handle unknown errors
+    if (!err || err === null) {
+      statusCode = 500;
+      message = 'Unknown error';
+    }
+
+    // Handle CustomAPIError
+    if (err instanceof CustomAPIError) {
+      statusCode = err.statusCode;
+      message = err.message;
+    }
+
+    // Handle MulterError
+    if (err instanceof MulterError) {
+      statusCode = HttpCodes.BAD_REQUEST;
+      message = err.message;
+    }
+
+    return res.status(statusCode || HttpCodes.INTERNAL_SERVER_ERROR).json({
+      name: err?.name || 'Error',
+      message: message || err?.message,
+    });
+  }
+}

src/presentation/server.ts

@@ -2,6 +2,7 @@ import 'express-async-errors';
 import express, { Router } from 'express';
 import cors from 'cors';
 import morgan from 'morgan';
+import { ErrorHandlerMiddleware } from './middlewares/error-handler.middleware';
 
 interface Options {
   port: number;
@@ -33,6 +34,9 @@ export class Server {
 
     this.app.use(this.routes);
 
+    //* Error Handler Middleware
+    this.app.use(ErrorHandlerMiddleware.handle);
+
     this.serverListener = this.app.listen(this.port, async () => {
       try {
         console.log(`Server running on port ${this.port}`);