refactor: sale estimates to nestjs

src/errors/service-error.ts

@@ -0,0 +1,14 @@
+import { HttpStatus } from '@nestjs/common';
+
+export class ServiceError extends Error {
+  constructor(
+    public message: string,
+    private status: HttpStatus = HttpStatus.INTERNAL_SERVER_ERROR,
+  ) {
+    super(message);
+  }
+
+  getStatus(): HttpStatus {
+    return this.status;
+  }
+} 

src/filters/service-error.filter.ts

@@ -0,0 +1,19 @@
+import { ExceptionFilter, Catch, ArgumentsHost, HttpStatus } from '@nestjs/common';
+import { Response } from 'express';
+import { ServiceError } from '../errors/service-error';
+
+@Catch(ServiceError)
+export class ServiceErrorFilter implements ExceptionFilter {
+  catch(exception: ServiceError, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const status = exception.getStatus();
+
+    response
+      .status(status)
+      .json({
+        statusCode: status,
+        message: exception.message,
+      });
+  }
+} 

src/main.ts

@@ -0,0 +1,13 @@
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+import { ServiceErrorFilter } from './filters/service-error.filter';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+
+  // Register the ServiceErrorFilter globally
+  app.useGlobalFilters(new ServiceErrorFilter());
+
+  await app.listen(3000);
+}
+bootstrap();