config: TimezoneInterceptor를 추가하여 Date 객체를 서울 시간대로 변경 #70

backend/src/app.module.ts

@@ -12,6 +12,8 @@ import { AuthModule } from './auth/auth.module';
 import { UserModule } from './user/user.module';
 import { BannerModule } from './banner/banner.module';
 import { AdminModule } from './admin/admin.module';
+import { APP_INTERCEPTOR } from '@nestjs/core';
+import { TimezoneInterceptor } from './config/TimezoneInterceptor';
 
 @Module({
   imports: [
@@ -28,6 +30,12 @@ import { AdminModule } from './admin/admin.module';
     AdminModule,
   ],
   controllers: [AppController],
-  providers: [AppService],
+  providers: [
+    AppService,
+    {
+      provide: APP_INTERCEPTOR,
+      useClass: TimezoneInterceptor,
+    },
+  ],
 })
 export class AppModule {}

backend/src/config/TimezoneInterceptor.ts

@@ -0,0 +1,35 @@
+import {
+  Injectable,
+  NestInterceptor,
+  ExecutionContext,
+  CallHandler,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+
+@Injectable()
+export class TimezoneInterceptor implements NestInterceptor {
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
+    return next.handle().pipe(
+      map((data) => {
+        if (data && typeof data === 'object') {
+          return this.convertDateToSeoulTime(data);
+        }
+        return data;
+      }),
+    );
+  }
+
+  private convertDateToSeoulTime(data: any): any {
+    for (const key in data) {
+      if (data[key] instanceof Date) {
+        data[key] = data[key].toLocaleString('ko-KR', {
+          timeZone: 'Asia/Seoul',
+        });
+      } else if (typeof data[key] === 'object') {
+        data[key] = this.convertDateToSeoulTime(data[key]);
+      }
+    }
+    return data;
+  }
+}