chore(server): return duplicate assets as group (#9576)

* chore(server): return duplicate assets as group

* file name

server/src/dtos/duplicate.dto.ts

@@ -0,0 +1,19 @@
+import { groupBy } from 'lodash';
+import { AssetResponseDto } from 'src/dtos/asset-response.dto';
+
+export class DuplicateResponseDto {
+  duplicateId!: string;
+  assets!: AssetResponseDto[];
+}
+
+export function mapDuplicateResponse(assets: AssetResponseDto[]): DuplicateResponseDto[] {
+  const result = [];
+
+  const grouped = groupBy(assets, (a) => a.duplicateId);
+
+  for (const [duplicateId, assets] of Object.entries(grouped)) {
+    result.push({ duplicateId, assets });
+  }
+
+  return result;
+}