refactor: 세미나/공지사항 게시물 like 관련 비즈니스 로직 리팩터링

src/main/java/com/example/demo/application/board/controller/AdminBoardController.java

@@ -10,7 +10,7 @@
 import org.springframework.web.bind.annotation.RestController;
 
 import com.example.demo.application.board.api.AdminBoardApi;
-import com.example.demo.domain.board.service.usecase.BoardAdminService;
+import com.example.demo.domain.board.service.service.BoardAdminService;
 import com.example.demo.global.base.dto.ResponseBody;
 
 import lombok.RequiredArgsConstructor;

src/main/java/com/example/demo/application/board/controller/BoardController.java

@@ -12,7 +12,7 @@
 import com.example.demo.domain.board.service.entity.vo.BoardType;
 import com.example.demo.domain.base.page.GlobalPageableDto;
 import com.example.demo.domain.board.service.entity.BoardInfo;
-import com.example.demo.domain.board.service.usecase.BoardService;
+import com.example.demo.domain.board.service.service.BoardService;
 import com.example.demo.global.aop.AssignUserId;
 import com.example.demo.global.base.dto.ResponseBody;
 import com.example.demo.global.base.dto.page.GlobalPageResponse;

src/main/java/com/example/demo/application/board/controller/BoardFileController.java

@@ -16,7 +16,7 @@
 import com.example.demo.application.board.api.BoardFileApi;
 import com.example.demo.application.board.dto.request.FileRequest;
 import com.example.demo.application.board.dto.request.PresignedUrlRequest;
-import com.example.demo.domain.board.service.usecase.BoardFileService;
+import com.example.demo.domain.board.service.service.BoardFileService;
 import com.example.demo.global.aop.AssignUserId;
 import com.example.demo.global.base.dto.ResponseBody;
 

src/main/java/com/example/demo/application/board/controller/CategoryController.java

@@ -16,7 +16,7 @@
 import com.example.demo.application.board.api.CategoryApi;
 import com.example.demo.domain.base.page.GlobalPageableDto;
 import com.example.demo.domain.board.service.entity.BoardTitleInfo;
-import com.example.demo.domain.board.service.usecase.CategoryService;
+import com.example.demo.domain.board.service.service.CategoryService;
 import com.example.demo.global.base.dto.ResponseBody;
 import com.example.demo.global.base.dto.page.GlobalPageResponse;
 

src/main/java/com/example/demo/application/board/controller/LikeController.java

@@ -15,8 +15,9 @@
 import org.springframework.web.bind.annotation.RestController;
 
 import com.example.demo.application.board.api.LikeApi;
+import com.example.demo.domain.base.page.GlobalPageableDto;
 import com.example.demo.domain.board.service.entity.BoardTitleInfo;
-import com.example.demo.domain.board.service.usecase.LikeService;
+import com.example.demo.domain.board.service.service.LikeService;
 import com.example.demo.global.aop.AssignUserId;
 import com.example.demo.global.base.dto.ResponseBody;
 import com.example.demo.global.base.dto.page.GlobalPageResponse;
@@ -52,6 +53,8 @@ public ResponseEntity<ResponseBody<Void>> deleteLike(Long userId,@PathVariable L
 	public ResponseEntity<ResponseBody<GlobalPageResponse<BoardTitleInfo>>> getLikes(
 		Long userId,
 		@PageableDefault(page=0, size=10,sort = "createdAt", direction = Sort.Direction.DESC) Pageable pageable) {
-		return ResponseEntity.ok(createSuccessResponse(likeService.getLikes(userId,pageable)));
+		return ResponseEntity.ok(createSuccessResponse(
+			GlobalPageResponse.create(
+			likeService.getLikes(userId, GlobalPageableDto.create(pageable)))));
 	}
 }

src/main/java/com/example/demo/domain/board/service/entity/BoardInfo.java

@@ -9,7 +9,6 @@
 import lombok.Getter;
 
 @Getter
-@EqualsAndHashCode
 public class BoardInfo {
 	private final Long boardId;
 	private final BoardContent boardContent;

src/main/java/com/example/demo/domain/board/service/implement/LikeHandler.java

@@ -1,66 +1,47 @@
 package com.example.demo.domain.board.service.implement;
 
-import com.example.demo.domain.board.service.service.LikeNotificationService;
-import com.example.demo.infra.board.Repository.BoardJpaRepository;
-import com.example.demo.infra.board.Repository.LikeRepository;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.example.demo.domain.base.page.GlobalPageableDto;
 import com.example.demo.domain.board.service.entity.BoardTitleInfo;
-import com.example.demo.infra.board.entity.Board;
-import com.example.demo.infra.board.entity.Like;
-import com.example.demo.domain.user.domain.User;
-import com.example.demo.domain.user.repository.UserJpaRepository;
-import com.example.demo.global.base.dto.page.GlobalPageResponse;
+import com.example.demo.domain.board.service.repository.LikeRepository;
 import com.example.demo.global.base.exception.ErrorCode;
 import com.example.demo.global.base.exception.ServiceException;
+
 import lombok.RequiredArgsConstructor;
-import org.springframework.data.domain.Pageable;
-import org.springframework.stereotype.Component;
-import org.springframework.transaction.annotation.Transactional;
 
 @Component
 @RequiredArgsConstructor
 public class LikeHandler {
     private final LikeRepository likeRepository;
-    private final BoardJpaRepository boardJpaRepository;
-    private final UserJpaRepository userJpaRepository;
-    private final LikeNotificationService likeNotificationService;
 
     @Transactional
     public void increaseLike(Long userId, Long boardId) {
-        Board board = (Board) boardJpaRepository.findByIdWithUser(boardId).orElseThrow
-                (() -> new ServiceException(ErrorCode.BOARD_NOT_FOUND));
-        User user = validateUser(userId);
-        if (likeRepository.existsByBoardIdAndUserId(boardId, userId)) {
-            throw new ServiceException(ErrorCode.USER_ALREADY_LIKE_BOARD);
-        }
-        Like like = new Like(user, board);
-        likeRepository.save(like);
-        likeNotificationService.saveLikeNotification(like);
+        likeRepository.saveLike(userId,boardId);
     }
 
 
     @Transactional(readOnly = true)
-    public GlobalPageResponse<BoardTitleInfo> getLikes(Long userId, Pageable pageable) {
-        return GlobalPageResponse.create(likeRepository.findBoardsByUserId(userId, pageable));
+    public GlobalPageableDto<BoardTitleInfo> getLikes(Long userId, GlobalPageableDto pageableDto) {
+        return likeRepository.findLikedBoardPageByUserId(userId, pageableDto);
     }
 
-    private User validateUser(Long userId) {
-        return userJpaRepository.findById(userId)
-                .orElseThrow(() -> new ServiceException(ErrorCode.LIKE_USER_NOT_FOUND));
+
+    @Transactional
+    public void decreaseLike(Long userId, Long boardId) {
+        likeRepository.deleteLike(userId,boardId);
     }
 
-    private Board validateBoard(Long boardId) {
-        return boardJpaRepository.findById(boardId)
-                .orElseThrow(() -> new ServiceException(ErrorCode.BOARD_NOT_FOUND));
+    public void validateExistLike(Long boardId, Long userId) {
+        if (likeRepository.existsByBoardIdAndUserId(boardId, userId)) {
+            throw new ServiceException(ErrorCode.USER_ALREADY_LIKE_BOARD);
+        }
     }
 
-    @Transactional
-    public void decreaseLike(Long userId, Long boardId) {
-        Board board = validateBoard(boardId);
-        User user = validateUser(userId);
-        Like like = likeRepository.findByBoardIdAndUserId(boardId, userId)
-                .orElseThrow(() -> new ServiceException(ErrorCode.USER_NOT_LIKE_BOARD));
-        board.getLikes().remove(like);
-        user.getLikes().remove(like);
-        likeRepository.delete(like);
+    public void validateNonExistLike(Long boardId, Long userId) {
+        if (!likeRepository.existsByBoardIdAndUserId(boardId, userId)) {
+            throw new ServiceException(ErrorCode.USER_NOT_LIKE_BOARD);
+        }
     }
 }

src/main/java/com/example/demo/domain/board/service/service/LikeNotificationService.java → src/main/java/com/example/demo/domain/board/service/implement/LikeNotificationHandler.java

@@ -1,4 +1,4 @@
-package com.example.demo.domain.board.service.service;
+package com.example.demo.domain.board.service.implement;
 
 import com.example.demo.infra.board.entity.Like;
 import com.example.demo.domain.notification.domain.entity.Notification;
@@ -14,7 +14,7 @@
 
 @Service
 @RequiredArgsConstructor
-public class LikeNotificationService {
+public class LikeNotificationHandler {
     private final NotificationRepository notificationRepository;
 
     @Async
@@ -28,9 +28,12 @@ public CompletableFuture<Notification> saveLikeNotification(Like like) {
         return CompletableFuture.completedFuture(null);
     }
 
+
     @Async
     @Transactional
     public void deleteLikeNotification(Long id) {
         notificationRepository.deleteByInvokerIdAndInvokerType(id, NotificationType.BOARD_LIKE);
     }
+
+
 }

src/main/java/com/example/demo/domain/board/service/repository/BoardCategoryRepository.java

@@ -1,7 +1,5 @@
 package com.example.demo.domain.board.service.repository;
 
-import java.util.List;
-
 import com.example.demo.domain.board.service.entity.BoardCategoryNames;
 import com.example.demo.domain.board.service.entity.BoardInfo;
 

src/main/java/com/example/demo/domain/board/service/repository/ImageFileRepository.java

@@ -1,9 +1,6 @@
 package com.example.demo.domain.board.service.repository;
 
-import java.util.Optional;
-
 import com.example.demo.domain.board.service.entity.BoardInfo;
-import com.example.demo.infra.board.entity.ImageFile;
 
 public interface ImageFileRepository {
 	void saveImageFile(String url, BoardInfo boardInfo);

src/main/java/com/example/demo/domain/board/service/repository/LikeRepository.java

@@ -0,0 +1,14 @@
+package com.example.demo.domain.board.service.repository;
+
+import com.example.demo.domain.base.page.GlobalPageableDto;
+import com.example.demo.domain.board.service.entity.BoardTitleInfo;
+
+public interface LikeRepository {
+	void saveLike(Long userId, Long boardId);
+
+	boolean existsByBoardIdAndUserId(Long boardId, Long userId);
+
+	void deleteLike(Long userId, Long boardId);
+
+	GlobalPageableDto<BoardTitleInfo> findLikedBoardPageByUserId(Long userId, GlobalPageableDto pageableDto);
+}

src/main/java/com/example/demo/domain/board/service/usecase/BoardAdminService.java → src/main/java/com/example/demo/domain/board/service/service/BoardAdminService.java

@@ -1,4 +1,4 @@
-package com.example.demo.domain.board.service.usecase;
+package com.example.demo.domain.board.service.service;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

src/main/java/com/example/demo/domain/board/service/usecase/BoardFileService.java → src/main/java/com/example/demo/domain/board/service/service/BoardFileService.java

@@ -1,4 +1,4 @@
-package com.example.demo.domain.board.service.usecase;
+package com.example.demo.domain.board.service.service;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

src/main/java/com/example/demo/domain/board/service/usecase/BoardService.java → src/main/java/com/example/demo/domain/board/service/service/BoardService.java

@@ -1,4 +1,4 @@
-package com.example.demo.domain.board.service.usecase;
+package com.example.demo.domain.board.service.service;
 
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.stereotype.Service;

src/main/java/com/example/demo/domain/board/service/usecase/CategoryService.java → src/main/java/com/example/demo/domain/board/service/service/CategoryService.java

@@ -1,4 +1,4 @@
-package com.example.demo.domain.board.service.usecase;
+package com.example.demo.domain.board.service.service;
 
 import java.util.List;
 

src/main/java/com/example/demo/domain/board/service/service/LikeService.java

@@ -0,0 +1,43 @@
+package com.example.demo.domain.board.service.service;
+
+import org.springframework.stereotype.Service;
+
+import com.example.demo.domain.base.page.GlobalPageableDto;
+import com.example.demo.domain.board.service.entity.BoardTitleInfo;
+import com.example.demo.domain.board.service.implement.BoardValidator;
+import com.example.demo.domain.board.service.implement.LikeHandler;
+import com.example.demo.domain.user.implement.UserReader;
+import com.example.demo.global.base.exception.ErrorCode;
+import com.example.demo.global.base.exception.ServiceException;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class LikeService {
+	private final LikeHandler likeHandler;
+	private final UserReader userReader;
+	private final BoardValidator boardValidator;
+
+	public void likeBoard(Long userId, Long boardId) {
+		boardValidator.validateExistBoard(boardId);
+		userReader.findUser(userId)
+			.orElseThrow(() -> new ServiceException(ErrorCode.LIKE_USER_NOT_FOUND));
+		likeHandler.validateExistLike(boardId, userId);
+		likeHandler.increaseLike(userId, boardId);
+		// likeNotificationHandler.saveLikeNotification(); TODO : LikeNotificationHandler 구현 필요
+	}
+
+	public GlobalPageableDto<BoardTitleInfo> getLikes(Long userId, GlobalPageableDto pageableDto) {
+		return likeHandler.getLikes(userId, pageableDto);
+	}
+
+	public void unlikeBoard(Long userId, Long boardId) {
+		boardValidator.validateExistBoard(boardId);
+		userReader.findUser(userId)
+			.orElseThrow(() -> new ServiceException(ErrorCode.LIKE_USER_NOT_FOUND));
+		likeHandler.validateNonExistLike(boardId, userId);
+
+		likeHandler.decreaseLike(userId, boardId);
+	}
+}

src/main/java/com/example/demo/domain/board/service/view/implement/ViewEagerIncreaseUpdater.java

@@ -3,7 +3,7 @@
 
 import org.springframework.stereotype.Service;
 
-import com.example.demo.infra.board.Repository.BoardJpaRepository;
+import com.example.demo.infra.board.repository.BoardJpaRepository;
 
 import lombok.RequiredArgsConstructor;
 

src/main/java/com/example/demo/domain/user/domain/User.java

@@ -63,17 +63,13 @@ public class User extends BaseEntity {
 //    @JoinColumn(name = "news_letter_id")
 //    private Newsletter newsletter;
 
-    @OneToMany(mappedBy = "user")
-    private List<Board> boards = new ArrayList<>();
 
     @OneToMany(mappedBy = "user")
     private List<BoardComment> boardComments = new ArrayList<>();
 
     @OneToMany(mappedBy = "user")
     private List<RecruitmentBoardComment> recruitmentBoardComments = new ArrayList<>();
 
-    @OneToMany(mappedBy = "user", cascade = CascadeType.PERSIST)
-    private List<Like> likes = new ArrayList<>();
 
     @OneToMany(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<SeminarApplication> seminarApplications = new ArrayList<>();
@@ -155,4 +151,8 @@ public boolean equals(Object obj) {
         User user = (User) obj;
         return id != null && id.equals(user.id);
     }
+
+    public User(Long id) {
+        this.id = id;
+    }
 }

src/main/java/com/example/demo/infra/board/category/repository/BoardCategoryRepositoryImpl.java

@@ -1,14 +1,12 @@
 package com.example.demo.infra.board.category.repository;
 
-import java.util.List;
-
 import org.springframework.stereotype.Repository;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.example.demo.domain.board.service.entity.BoardCategoryNames;
 import com.example.demo.domain.board.service.entity.BoardInfo;
 import com.example.demo.domain.board.service.repository.BoardCategoryRepository;
-import com.example.demo.infra.board.Repository.BoardJpaRepository;
+import com.example.demo.infra.board.repository.BoardJpaRepository;
 import com.example.demo.infra.board.entity.Board;
 import com.example.demo.infra.board.category.entity.BoardCategory;
 import com.example.demo.infra.board.category.entity.Category;