feat: TalkRoom 단건 조회 API 구현 (#33)

src/main/java/com/jisungin/api/talkroom/TalkRoomController.java

@@ -8,13 +8,15 @@
 import com.jisungin.api.talkroom.request.TalkRoomSearchRequest;
 import com.jisungin.application.response.PageResponse;
 import com.jisungin.application.talkroom.TalkRoomService;
-import com.jisungin.application.talkroom.response.TalkRoomQueryResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindAllResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindOneResponse;
 import com.jisungin.application.talkroom.response.TalkRoomResponse;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -35,8 +37,14 @@ public ApiResponse<TalkRoomResponse> createTalkRoom(@Valid @RequestBody TalkRoom
     }
 
     @GetMapping("/talk-rooms")
-    public ApiResponse<PageResponse<TalkRoomQueryResponse>> getTalkRooms(@ModelAttribute TalkRoomSearchRequest search) {
-        return ApiResponse.ok(talkRoomService.getTalkRooms(search.toService()));
+    public ApiResponse<PageResponse<TalkRoomFindAllResponse>> findAllTalkRoom(
+            @ModelAttribute TalkRoomSearchRequest search) {
+        return ApiResponse.ok(talkRoomService.findAllTalkRoom(search.toService()));
+    }
+
+    @GetMapping("/talk-room/{talkRoomId}")
+    public ApiResponse<TalkRoomFindOneResponse> findOneTalkRoom(@PathVariable Long talkRoomId) {
+        return ApiResponse.ok(talkRoomService.findOneTalkRoom(talkRoomId));
     }
 
     @PatchMapping("/talk-rooms")

src/main/java/com/jisungin/application/talkroom/TalkRoomService.java

@@ -4,7 +4,8 @@
 import com.jisungin.application.talkroom.request.TalkRoomCreateServiceRequest;
 import com.jisungin.application.talkroom.request.TalkRoomEditServiceRequest;
 import com.jisungin.application.talkroom.request.TalkRoomSearchServiceRequest;
-import com.jisungin.application.talkroom.response.TalkRoomQueryResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindAllResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindOneResponse;
 import com.jisungin.application.talkroom.response.TalkRoomResponse;
 import com.jisungin.domain.ReadingStatus;
 import com.jisungin.domain.book.Book;
@@ -52,15 +53,22 @@ public TalkRoomResponse createTalkRoom(TalkRoomCreateServiceRequest request, Lon
                 book.getImageUrl(), book.getTitle());
     }
 
-    public PageResponse<TalkRoomQueryResponse> getTalkRooms(TalkRoomSearchServiceRequest search) {
-        return talkRoomRepository.getTalkRooms(search);
+    public PageResponse<TalkRoomFindAllResponse> findAllTalkRoom(TalkRoomSearchServiceRequest search) {
+        return talkRoomRepository.findAllTalkRoom(search);
+    }
+
+    public TalkRoomFindOneResponse findOneTalkRoom(Long talkRoomId) {
+        TalkRoom talkRoom = talkRoomRepository.findById(talkRoomId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.TALK_ROOM_NOT_FOUND));
+
+        return talkRoomRepository.findOneTalkRoom(talkRoom.getId());
     }
 
     @Transactional
     public TalkRoomResponse editTalkRoom(TalkRoomEditServiceRequest request, Long userId) {
         User user = userRepository.findById(userId)
                 .orElseThrow(() -> new BusinessException(ErrorCode.USER_NOT_FOUND));
-        
+
         TalkRoom talkRoom = talkRoomRepository.findByIdWithUserAndBook(request.getId());
 
         if (!talkRoom.isTalkRoomOwner(user.getId())) {

src/main/java/com/jisungin/application/talkroom/response/TalkRoomQueryResponse.java → src/main/java/com/jisungin/application/talkroom/response/TalkRoomFindAllResponse.java

@@ -9,7 +9,7 @@
 
 @Getter
 @NoArgsConstructor
-public class TalkRoomQueryResponse {
+public class TalkRoomFindAllResponse {
 
     private Long talkRoomId;
     private String userName;
@@ -21,8 +21,8 @@ public class TalkRoomQueryResponse {
 
     @Builder
     @QueryProjection
-    public TalkRoomQueryResponse(Long talkRoomId, String userName, String title, String content, String bookName,
-                                 String bookImage) {
+    public TalkRoomFindAllResponse(Long talkRoomId, String userName, String title, String content, String bookName,
+                                   String bookImage) {
         this.talkRoomId = talkRoomId;
         this.userName = userName;
         this.title = title;

src/main/java/com/jisungin/application/talkroom/response/TalkRoomFindOneResponse.java

@@ -0,0 +1,43 @@
+package com.jisungin.application.talkroom.response;
+
+import com.querydsl.core.annotations.QueryProjection;
+import java.util.ArrayList;
+import java.util.List;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class TalkRoomFindOneResponse {
+
+    private Long talkRoomId;
+    private String userName;
+    private String title;
+    private String content;
+    private String bookName;
+    private String bookImage;
+    private List<TalkRoomQueryReadingStatus> readingStatuses = new ArrayList<>();
+    private List<TalkRoomQueryComments> comments = new ArrayList<>();
+
+    @Builder
+    @QueryProjection
+    public TalkRoomFindOneResponse(Long talkRoomId, String userName, String title, String content, String bookName,
+                                   String bookImage) {
+        this.talkRoomId = talkRoomId;
+        this.userName = userName;
+        this.title = title;
+        this.content = content;
+        this.bookName = bookName;
+        this.bookImage = bookImage;
+    }
+
+    public void addTalkRoomStatus(List<TalkRoomQueryReadingStatus> readingStatuses) {
+        this.readingStatuses = readingStatuses;
+    }
+
+    public void addTalkRoomComments(List<TalkRoomQueryComments> comments) {
+        this.comments = comments;
+    }
+
+}

src/main/java/com/jisungin/application/talkroom/response/TalkRoomQueryComments.java

@@ -0,0 +1,24 @@
+package com.jisungin.application.talkroom.response;
+
+import com.querydsl.core.annotations.QueryProjection;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class TalkRoomQueryComments {
+
+    private Long commentId;
+    private String userName;
+    private String content;
+
+    @Builder
+    @QueryProjection
+    public TalkRoomQueryComments(Long commentId, String userName, String content) {
+        this.commentId = commentId;
+        this.userName = userName;
+        this.content = content;
+    }
+
+}

src/main/java/com/jisungin/domain/talkroom/repository/TalkRoomRepositoryCustom.java

@@ -2,10 +2,12 @@
 
 import com.jisungin.application.response.PageResponse;
 import com.jisungin.application.talkroom.request.TalkRoomSearchServiceRequest;
-import com.jisungin.application.talkroom.response.TalkRoomQueryResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindAllResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindOneResponse;
 
 public interface TalkRoomRepositoryCustom {
 
-    PageResponse<TalkRoomQueryResponse> getTalkRooms(TalkRoomSearchServiceRequest search);
+    PageResponse<TalkRoomFindAllResponse> findAllTalkRoom(TalkRoomSearchServiceRequest search);
 
+    TalkRoomFindOneResponse findOneTalkRoom(Long talkRoomId);
 }

src/main/java/com/jisungin/domain/talkroom/repository/TalkRoomRepositoryImpl.java

@@ -1,16 +1,21 @@
 package com.jisungin.domain.talkroom.repository;
 
 import static com.jisungin.domain.book.QBook.book;
+import static com.jisungin.domain.comment.QComment.comment;
 import static com.jisungin.domain.talkroom.QTalkRoom.talkRoom;
 import static com.jisungin.domain.talkroom.QTalkRoomRole.talkRoomRole;
 import static com.jisungin.domain.user.QUser.user;
 
 import com.jisungin.application.response.PageResponse;
 import com.jisungin.application.talkroom.request.TalkRoomSearchServiceRequest;
+import com.jisungin.application.talkroom.response.QTalkRoomFindAllResponse;
+import com.jisungin.application.talkroom.response.QTalkRoomFindOneResponse;
+import com.jisungin.application.talkroom.response.QTalkRoomQueryComments;
 import com.jisungin.application.talkroom.response.QTalkRoomQueryReadingStatus;
-import com.jisungin.application.talkroom.response.QTalkRoomQueryResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindAllResponse;
+import com.jisungin.application.talkroom.response.TalkRoomFindOneResponse;
+import com.jisungin.application.talkroom.response.TalkRoomQueryComments;
 import com.jisungin.application.talkroom.response.TalkRoomQueryReadingStatus;
-import com.jisungin.application.talkroom.response.TalkRoomQueryResponse;
 import com.querydsl.core.types.OrderSpecifier;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import java.util.List;
@@ -24,10 +29,10 @@ public class TalkRoomRepositoryImpl implements TalkRoomRepositoryCustom {
     private final JPAQueryFactory queryFactory;
 
     @Override
-    public PageResponse<TalkRoomQueryResponse> getTalkRooms(TalkRoomSearchServiceRequest search) {
+    public PageResponse<TalkRoomFindAllResponse> findAllTalkRoom(TalkRoomSearchServiceRequest search) {
 
         //루트 조회(toOne 코드를 모두 한번에 조회)
-        List<TalkRoomQueryResponse> findTalkRoom = findTalkRoom(search);
+        List<TalkRoomFindAllResponse> findTalkRoom = findTalkRoomBySearch(search);
 
         //TalkRoomRole 컬렉션을 MAP 한방에 조회
         Map<Long, List<TalkRoomQueryReadingStatus>> talkRoomRoleMap = findTalkRoomRoleMap(toTalkRoomIds(findTalkRoom));
@@ -37,14 +42,52 @@ public PageResponse<TalkRoomQueryResponse> getTalkRooms(TalkRoomSearchServiceReq
 
         long totalCount = getTotalTalkRoomCount();
 
-        return PageResponse.<TalkRoomQueryResponse>builder()
+        return PageResponse.<TalkRoomFindAllResponse>builder()
                 .queryResponse(findTalkRoom)
                 .totalCount(totalCount)
                 .size(search.getSize())
                 .build();
     }
 
-    private List<Long> toTalkRoomIds(List<TalkRoomQueryResponse> findTalkRoom) {
+    @Override
+    public TalkRoomFindOneResponse findOneTalkRoom(Long talkRoomId) {
+        TalkRoomFindOneResponse findOneTalkRoom = findTalkRoomByTalkRoomId(talkRoomId);
+
+        List<TalkRoomQueryReadingStatus> talkRoomRoles = findTalkRoomRoleByTalkRoomId(talkRoomId);
+        findOneTalkRoom.addTalkRoomStatus(talkRoomRoles);
+
+        List<TalkRoomQueryComments> talkRoomComments = findCommentsByTalkRoomId(talkRoomId);
+        findOneTalkRoom.addTalkRoomComments(talkRoomComments);
+
+        return findOneTalkRoom;
+
+    }
+
+    private List<TalkRoomQueryComments> findCommentsByTalkRoomId(Long talkRoomId) {
+        return queryFactory.select(new QTalkRoomQueryComments(
+                        comment.id.as("commentId"),
+                        user.name.as("userName"),
+                        comment.content
+                ))
+                .from(comment)
+                .join(comment.talkRoom, talkRoom)
+                .join(comment.user, user)
+                .where(comment.talkRoom.id.eq(talkRoomId))
+                .fetch();
+    }
+
+    private List<TalkRoomQueryReadingStatus> findTalkRoomRoleByTalkRoomId(Long talkRoomId) {
+        return queryFactory.select(new QTalkRoomQueryReadingStatus(
+                        talkRoom.id,
+                        talkRoomRole.readingStatus
+                ))
+                .from(talkRoomRole)
+                .join(talkRoomRole.talkRoom, talkRoom)
+                .where(talkRoomRole.talkRoom.id.eq(talkRoomId))
+                .fetch();
+    }
+
+    private List<Long> toTalkRoomIds(List<TalkRoomFindAllResponse> findTalkRoom) {
         return findTalkRoom.stream()
                 .map(t -> t.getTalkRoomId())
                 .collect(Collectors.toList());
@@ -73,8 +116,8 @@ private long getTotalTalkRoomCount() {
                 .fetchOne();
     }
 
-    private List<TalkRoomQueryResponse> findTalkRoom(TalkRoomSearchServiceRequest search) {
-        return queryFactory.select(new QTalkRoomQueryResponse(
+    private List<TalkRoomFindAllResponse> findTalkRoomBySearch(TalkRoomSearchServiceRequest search) {
+        return queryFactory.select(new QTalkRoomFindAllResponse(
                         talkRoom.id.as("talkRoomId"),
                         user.name.as("userName"),
                         talkRoom.title,
@@ -91,6 +134,22 @@ private List<TalkRoomQueryResponse> findTalkRoom(TalkRoomSearchServiceRequest se
                 .fetch();
     }
 
+    private TalkRoomFindOneResponse findTalkRoomByTalkRoomId(Long talkRoomId) {
+        return queryFactory.select(new QTalkRoomFindOneResponse(
+                        talkRoom.id.as("talkRoomId"),
+                        user.name.as("userName"),
+                        talkRoom.title,
+                        talkRoom.content,
+                        book.title,
+                        book.imageUrl.as("bookImage")
+                ))
+                .from(talkRoom)
+                .join(talkRoom.user, user)
+                .join(talkRoom.book, book)
+                .where(talkRoom.id.eq(talkRoomId))
+                .fetchOne();
+    }
+
     /**
      * 아직 좋아요 기능이 구현 되지 않아 최신순으로만 정렬
      */