http-exception.filter.ts

import { ExceptionFilter, Catch, ArgumentsHost, HttpException } from '@nestjs/common';
import { Response } from 'express';

@Catch(HttpException) // Catches only HTTP-related exceptions
export class HttpExceptionFilter implements ExceptionFilter {
  catch(exception: HttpException, host: ArgumentsHost) {
    const ctx = host.switchToHttp();
    const response = ctx.getResponse<Response>();
    const status = exception.getStatus();
    const message = exception.getResponse();

    response.status(status).json({
      statusCode: status,
      message,
      timestamp: new Date().toISOString(),
    });
  }
}