♻️refactor: 그룹이 삭제될 때 채팅방도 삭제[#182]

그룹이 영구 삭제될 때 해당 그룹과 연결된 채팅방도 함께 삭제되도록 합니다.

이를 통해 연결되지 않은 채팅방이 남는 것을 방지하고 데이터 일관성을 유지합니다.

그룹 채팅방을 찾을 수 없는 경우를 대비하여 GroupErrorCode를 추가합니다.

Author: LimdaeIl

src/main/java/team/wego/wegobackend/group/domain/exception/GroupErrorCode.java

@@ -202,7 +202,7 @@ public enum GroupErrorCode implements ErrorCode {
     ALREADY_REQUESTED_TO_JOIN(HttpStatus.BAD_REQUEST, "모임: 이미 가입 요청한 상태입니다. 모임 ID: %s 회원 ID: %s"),
     DUPLICATED_IMAGE_KEY_IN_REQUEST(HttpStatus.BAD_REQUEST, "모임: 이미지 키가 중복되었습니다."),
 
-    ;
+    GROUP_CHAT_ROOM_NOT_FOUND_BY_ID(HttpStatus.NOT_FOUND, "모임: 모임 채팅방을 찾을 수 없습니다. 모임 ID: %s");
 
     private final HttpStatus status;
     private final String message;

src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2DeleteService.java

@@ -8,6 +8,8 @@
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.transaction.support.TransactionSynchronization;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
+import team.wego.wegobackend.chat.domain.entity.ChatRoom;
+import team.wego.wegobackend.chat.domain.repository.ChatRoomRepository;
 import team.wego.wegobackend.group.domain.exception.GroupErrorCode;
 import team.wego.wegobackend.group.domain.exception.GroupException;
 import team.wego.wegobackend.group.v2.application.event.GroupDeletedEvent;
@@ -32,6 +34,8 @@ public class GroupV2DeleteService {
     private final ImageUploadService imageUploadService;
     private final ApplicationEventPublisher eventPublisher;
 
+    private final ChatRoomRepository chatRoomRepository;
+
     @Transactional
     public void deleteHard(Long userId, Long groupId) {
         if (userId == null) {
@@ -60,7 +64,14 @@ public void deleteHard(Long userId, Long groupId) {
         // S3 삭제 대상 URL도 삭제 전에 확보
         List<String> variantUrls = groupImageV2Repository.findAllVariantUrlsByGroupId(groupId);
 
+        // chat room 확인
+        ChatRoom chatRoom = chatRoomRepository.findByGroupId(groupId)
+                .orElseThrow(
+                        () -> new GroupException(GroupErrorCode.GROUP_CHAT_ROOM_NOT_FOUND_BY_ID,
+                                groupId));
+
         // DB 삭제
+        chatRoomRepository.deleteById(chatRoom.getId());
         groupUserV2Repository.deleteByGroupId(groupId);
         groupTagV2Repository.deleteByGroupId(groupId);
         groupImageV2Repository.deleteVariantsByGroupId(groupId);

src/main/java/team/wego/wegobackend/group/v2/domain/entity/GroupV2.java

@@ -13,13 +13,15 @@
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.OneToMany;
+import jakarta.persistence.OneToOne;
 import jakarta.persistence.Table;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import team.wego.wegobackend.chat.domain.entity.ChatRoom;
 import team.wego.wegobackend.common.entity.BaseTimeEntity;
 import team.wego.wegobackend.group.domain.exception.GroupErrorCode;
 import team.wego.wegobackend.group.domain.exception.GroupException;
@@ -78,6 +80,9 @@ public class GroupV2 extends BaseTimeEntity {
     @OneToMany(mappedBy = "group", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<GroupUserV2> users = new ArrayList<>();
 
+    @OneToOne(mappedBy = "group", cascade = CascadeType.ALL, orphanRemoval = true)
+    private ChatRoom chatRoom;
+
     public static GroupV2 create(
             String title,
             GroupV2Address address,