transform http response json

server/src/interceptors/http-response.interceptor.ts

@@ -0,0 +1,27 @@
+import {
+  CallHandler,
+  ExecutionContext,
+  Injectable,
+  NestInterceptor,
+} from '@nestjs/common';
+import { map, Observable } from 'rxjs';
+export interface Response<T> {
+  data: T;
+}
+
+@Injectable()
+export class TransformHttpResponseInterceptor<T>
+  implements NestInterceptor<T, Response<T>>
+{
+  intercept(
+    context: ExecutionContext,
+    next: CallHandler<T>,
+  ): Observable<Response<T>> {
+    return next.handle().pipe(
+      map((data) => {
+        const status = context.switchToHttp().getResponse().statusCode;
+        return { data, success: true, status };
+      }),
+    );
+  }
+}

server/src/main.ts

@@ -5,6 +5,7 @@ import {
   NestFastifyApplication,
 } from '@nestjs/platform-fastify';
 import { ValidationPipe } from '@nestjs/common';
+import { TransformHttpResponseInterceptor } from './interceptors/http-response.interceptor';
 
 async function bootstrap() {
   const app = await NestFactory.create<NestFastifyApplication>(
@@ -22,6 +23,8 @@ async function bootstrap() {
     }),
   );
 
+  app.useGlobalInterceptors(new TransformHttpResponseInterceptor());
+
   await app.listen(3000);
 }
 bootstrap();