From 127dd59275cc17c09bbbe17844f6c1142bfde491 Mon Sep 17 00:00:00 2001
From: minij02 <mjryu00211@gmail.com>
Date: Wed, 3 Jun 2026 13:24:31 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=EC=B1=84=ED=8C=85=EB=B0=A9=20=EB=AA=A9?=
 =?UTF-8?q?=EB=A1=9D=20last=5Fmessage=EC=97=90=20attachment=5Fsummary=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80=20(#509)?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- ChatRoomListLastMessageDto에 attachment_summary(image_count/file_count) 필드 추가
- 첨부 type(IMAGE/FILE)을 카운트해서 응답, 첨부 없으면 null
- Swagger는 기존 명세와 일치(별도 변경 없음)
---
 src/chat/dtos/chat.dto.ts | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/src/chat/dtos/chat.dto.ts b/src/chat/dtos/chat.dto.ts
index a9ae412..231b411 100644
--- a/src/chat/dtos/chat.dto.ts
+++ b/src/chat/dtos/chat.dto.ts
@@ -144,10 +144,16 @@ export interface ChatRoomListPartnerDto {
   profile_image_url: string;
 }
 
+export interface AttachmentSummaryDto {
+  image_count: number;
+  file_count: number;
+}
+
 export interface ChatRoomListLastMessageDto {
   content: string;
   sent_at: string;
   has_attachments: boolean;
+  attachment_summary: AttachmentSummaryDto | null;
 }
 
 export interface ChatRoomListItemDto{
@@ -183,11 +189,21 @@ export class ChatRoomListResponseDto {
       
       const partnerData = room.participants.find((part: any) => part.user_id !== userId);
 
-      const lastMsg = room.lastMessage ? {
-        content: room.lastMessage.content,
-        sent_at: room.lastMessage.sent_at,
-        has_attachments: room.lastMessage.attachments.length > 0
-      } : null;
+      const lastMsg = room.lastMessage ? (() => {
+        const attachments = room.lastMessage.attachments ?? [];
+        const hasAttachments = attachments.length > 0;
+        return {
+          content: room.lastMessage.content,
+          sent_at: room.lastMessage.sent_at,
+          has_attachments: hasAttachments,
+          attachment_summary: hasAttachments
+            ? {
+                image_count: attachments.filter((a: any) => a.type === "IMAGE").length,
+                file_count: attachments.filter((a: any) => a.type === "FILE").length,
+              }
+            : null,
+        };
+      })() : null;
 
       return {
         room_id: room.room_id,