feat : Implement board delete API

src/main/java/com/gamzabat/algohub/exception/CustomExceptionHandler.java

@@ -5,7 +5,7 @@
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 
-import com.gamzabat.algohub.feature.board.exception.BoardValidationExceoption;
+import com.gamzabat.algohub.feature.board.exception.BoardValidationException;
 import com.gamzabat.algohub.feature.comment.exception.CommentValidationException;
 import com.gamzabat.algohub.feature.group.ranking.exception.CannotFoundRankingException;
 import com.gamzabat.algohub.feature.group.studygroup.exception.CannotFoundGroupException;
@@ -101,8 +101,8 @@ protected ResponseEntity<ErrorResponse> handler(SolvedAcApiErrorException e) {
 		return ResponseEntity.status(e.getCode()).body(new ErrorResponse(e.getCode(), e.getError(), null));
 	}
 
-	@ExceptionHandler(BoardValidationExceoption.class)
-	protected ResponseEntity<ErrorResponse> handler(BoardValidationExceoption e) {
+	@ExceptionHandler(BoardValidationException.class)
+	protected ResponseEntity<ErrorResponse> handler(BoardValidationException e) {
 		return ResponseEntity.status(HttpStatus.SERVICE_UNAVAILABLE)
 			.body(new ErrorResponse(HttpStatus.SERVICE_UNAVAILABLE.value(), e.getError(), null));
 	}

src/main/java/com/gamzabat/algohub/feature/board/controller/BoardController.java

@@ -4,6 +4,7 @@
 
 import org.springframework.http.ResponseEntity;
 import org.springframework.validation.Errors;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -66,4 +67,11 @@ public ResponseEntity<Void> updateBoard(@AuthedUser User user, @Valid @RequestBo
 		boardService.updateBoard(user, request);
 		return ResponseEntity.ok().build();
 	}
+
+	@DeleteMapping
+	@Operation(summary = "공지 삭제 API")
+	public ResponseEntity<Void> deleteBoard(@AuthedUser User user, @RequestParam Long boardId) {
+		boardService.deleteBoard(user, boardId);
+		return ResponseEntity.ok().build();
+	}
 }

src/main/java/com/gamzabat/algohub/feature/board/exception/BoardValidationExceoption.java → src/main/java/com/gamzabat/algohub/feature/board/exception/BoardValidationException.java

@@ -3,10 +3,10 @@
 import lombok.Getter;
 
 @Getter
-public class BoardValidationExceoption extends RuntimeException {
+public class BoardValidationException extends RuntimeException {
 	private final String error;
 
-	public BoardValidationExceoption(String error) {
+	public BoardValidationException(String error) {
 		this.error = error;
 	}
 }

src/main/java/com/gamzabat/algohub/feature/board/repository/BoardCommentRepository.java

@@ -3,11 +3,17 @@
 import java.util.List;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
 
 import com.gamzabat.algohub.feature.board.domain.Board;
 import com.gamzabat.algohub.feature.board.domain.BoardComment;
 
 public interface BoardCommentRepository extends JpaRepository<BoardComment, Long> {
 
 	List<BoardComment> findAllByBoard(Board board);
+
+	@Modifying
+	@Query("delete from BoardComment c where c.board = :board")
+	void deleteAllCommentByBoard(Board board);
 }

src/main/java/com/gamzabat/algohub/feature/board/service/BoardCommentService.java

@@ -11,7 +11,7 @@
 import com.gamzabat.algohub.feature.board.domain.Board;
 import com.gamzabat.algohub.feature.board.domain.BoardComment;
 import com.gamzabat.algohub.feature.board.dto.CreateBoardCommentRequest;
-import com.gamzabat.algohub.feature.board.exception.BoardValidationExceoption;
+import com.gamzabat.algohub.feature.board.exception.BoardValidationException;
 import com.gamzabat.algohub.feature.board.repository.BoardCommentRepository;
 import com.gamzabat.algohub.feature.board.repository.BoardRepository;
 import com.gamzabat.algohub.feature.comment.dto.GetCommentResponse;
@@ -106,7 +106,7 @@ public void deleteComment(User user, Long commentId) {
 
 	private Board validateBoard(User user, Long boardId) {
 		Board board = boardRepository.findById(boardId)
-			.orElseThrow(() -> new BoardValidationExceoption("공지사항이 존재하지 않습니다."));
+			.orElseThrow(() -> new BoardValidationException("공지사항이 존재하지 않습니다."));
 
 		StudyGroup group = studyGroupRepository.findById(board.getStudyGroup().getId())
 			.orElseThrow(() -> new StudyGroupValidationException(

src/main/java/com/gamzabat/algohub/feature/board/service/BoardService.java

@@ -15,7 +15,8 @@
 import com.gamzabat.algohub.feature.board.dto.CreateBoardRequest;
 import com.gamzabat.algohub.feature.board.dto.GetBoardResponse;
 import com.gamzabat.algohub.feature.board.dto.UpdateBoardRequest;
-import com.gamzabat.algohub.feature.board.exception.BoardValidationExceoption;
+import com.gamzabat.algohub.feature.board.exception.BoardValidationException;
+import com.gamzabat.algohub.feature.board.repository.BoardCommentRepository;
 import com.gamzabat.algohub.feature.board.repository.BoardRepository;
 import com.gamzabat.algohub.feature.group.studygroup.domain.GroupMember;
 import com.gamzabat.algohub.feature.group.studygroup.domain.StudyGroup;
@@ -24,7 +25,6 @@
 import com.gamzabat.algohub.feature.group.studygroup.repository.GroupMemberRepository;
 import com.gamzabat.algohub.feature.group.studygroup.repository.StudyGroupRepository;
 import com.gamzabat.algohub.feature.user.domain.User;
-import com.gamzabat.algohub.feature.user.repository.UserRepository;
 
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -35,7 +35,7 @@
 
 public class BoardService {
 	private final BoardRepository boardRepository;
-	private final UserRepository userRepository;
+	private final BoardCommentRepository boardCommentRepository;
 	private final StudyGroupRepository studyGroupRepository;
 	private final GroupMemberRepository groupMemberRepository;
 
@@ -63,7 +63,7 @@ public void createBoard(@AuthedUser User user, CreateBoardRequest request) {
 	@Transactional(readOnly = true)
 	public GetBoardResponse getBoard(@AuthedUser User user, Long boardId) {
 		Board board = boardRepository.findById(boardId)
-			.orElseThrow(() -> new BoardValidationExceoption("존재하지 않는 공지입니다"));
+			.orElseThrow(() -> new BoardValidationException("존재하지 않는 게시글입니다"));
 		if (!groupMemberRepository.existsByUserAndStudyGroup(user, board.getStudyGroup()))
 			throw new StudyGroupValidationException(HttpStatus.FORBIDDEN.value(), "참여하지 않은 스터디 그룹 입니다.");
 
@@ -93,13 +93,32 @@ public List<GetBoardResponse> getBoardList(@AuthedUser User user, Long studyGrou
 	@Transactional
 	public void updateBoard(User user, UpdateBoardRequest request) {
 		Board board = boardRepository.findById(request.boardId())
-			.orElseThrow(() -> new BoardValidationExceoption("존재하지 않는 게시글입니다"));
-		StudyGroup studyGroup = studyGroupRepository.findById(board.getStudyGroup().getId())
-			.orElseThrow(() -> new StudyGroupValidationException(HttpStatus.BAD_REQUEST.value(), "존재하지 않는 스터디 그룹입니다"));
+			.orElseThrow(() -> new BoardValidationException("존재하지 않는 게시글입니다"));
+		validateStudyGroupExists(board);
 		if (!user.getId().equals(board.getAuthor().getId()))
 			throw new UserValidationException("공지를 수정할 수 있는 권한이 없습니다");
 
 		board.updateBoard(request.title(), request.content());
 	}
 
+	@Transactional
+	public void deleteBoard(User user, Long boardId) {
+		Board board = boardRepository.findById(boardId)
+			.orElseThrow(() -> new BoardValidationException("존재하지 않는 게시글입니다"));
+		validateStudyGroupExists(board);
+
+		if (!user.getId().equals(board.getAuthor().getId()))
+			throw new UserValidationException("공지를 삭제할 수 있는 권한이 없습니다");
+
+		boardCommentRepository.deleteAllCommentByBoard(board);
+		boardRepository.delete(board);
+
+		log.info("success to delete board. userId: {}, boardId: {}", user.getId(), boardId);
+	}
+
+	private void validateStudyGroupExists(Board board) {
+		studyGroupRepository.findById(board.getStudyGroup().getId())
+			.orElseThrow(() -> new StudyGroupValidationException(HttpStatus.BAD_REQUEST.value(), "존재하지 않는 스터디 그룹입니다"));
+	}
+
 }

src/test/java/com/gamzabat/algohub/feature/board/service/BoardCommentServiceTest.java

@@ -29,7 +29,7 @@
 import com.gamzabat.algohub.feature.board.domain.Board;
 import com.gamzabat.algohub.feature.board.domain.BoardComment;
 import com.gamzabat.algohub.feature.board.dto.CreateBoardCommentRequest;
-import com.gamzabat.algohub.feature.board.exception.BoardValidationExceoption;
+import com.gamzabat.algohub.feature.board.exception.BoardValidationException;
 import com.gamzabat.algohub.feature.board.repository.BoardCommentRepository;
 import com.gamzabat.algohub.feature.board.repository.BoardRepository;
 import com.gamzabat.algohub.feature.comment.domain.Comment;
@@ -109,7 +109,7 @@ void createComment_1() {
 		when(studyGroupRepository.findById(30L)).thenReturn(Optional.ofNullable(studyGroup));
 		when(groupMemberRepository.existsByUserAndStudyGroup(user2, studyGroup)).thenReturn(true);
 		when(commentRepository.save(any(BoardComment.class))).thenReturn(comment);
-		
+
 		// when
 		commentService.createComment(user2, request);
 		// then
@@ -132,7 +132,7 @@ void createCommentFailed_1() {
 		when(boardRepository.findById(10L)).thenReturn(Optional.empty());
 		// when, then
 		assertThatThrownBy(() -> commentService.createComment(user, request))
-			.isInstanceOf(BoardValidationExceoption.class)
+			.isInstanceOf(BoardValidationException.class)
 			.hasFieldOrPropertyWithValue("error", "공지사항이 존재하지 않습니다.");
 		verify(notificationService, never()).send(any(), any(), any(), any());
 	}
@@ -225,7 +225,7 @@ void getCommentListFailed_1() {
 		when(boardRepository.findById(10L)).thenReturn(Optional.empty());
 		// when, then
 		assertThatThrownBy(() -> commentService.getCommentList(user, 10L))
-			.isInstanceOf(BoardValidationExceoption.class)
+			.isInstanceOf(BoardValidationException.class)
 			.hasFieldOrPropertyWithValue("error", "공지사항이 존재하지 않습니다.");
 	}
 
@@ -300,7 +300,7 @@ void deleteCommentFailed_3() {
 		when(commentRepository.findById(40L)).thenReturn(Optional.ofNullable(comment));
 		// when, then
 		assertThatThrownBy(() -> commentService.deleteComment(user, 40L))
-			.isInstanceOf(BoardValidationExceoption.class)
+			.isInstanceOf(BoardValidationException.class)
 			.hasFieldOrPropertyWithValue("error", "공지사항이 존재하지 않습니다.");
 	}
 

src/test/java/com/gamzabat/algohub/service/BoardServiceTest.java

@@ -29,7 +29,8 @@
 import com.gamzabat.algohub.feature.board.dto.CreateBoardRequest;
 import com.gamzabat.algohub.feature.board.dto.GetBoardResponse;
 import com.gamzabat.algohub.feature.board.dto.UpdateBoardRequest;
-import com.gamzabat.algohub.feature.board.exception.BoardValidationExceoption;
+import com.gamzabat.algohub.feature.board.exception.BoardValidationException;
+import com.gamzabat.algohub.feature.board.repository.BoardCommentRepository;
 import com.gamzabat.algohub.feature.board.repository.BoardRepository;
 import com.gamzabat.algohub.feature.board.service.BoardService;
 import com.gamzabat.algohub.feature.group.studygroup.domain.GroupMember;
@@ -49,6 +50,8 @@ public class BoardServiceTest {
 	private BoardRepository boardRepository;
 	@Mock
 	GroupMemberRepository groupMemberRepository;
+	@Mock
+	private BoardCommentRepository boardCommentRepository;
 	@Captor
 	private ArgumentCaptor<Board> boardCaptor;
 
@@ -187,8 +190,8 @@ void getBoardFailed_1() {
 
 		//when, then
 		assertThatThrownBy(() -> boardService.getBoard(user, 1001L))
-			.isInstanceOf(BoardValidationExceoption.class)
-			.hasFieldOrPropertyWithValue("error", "존재하지 않는 공지입니다");
+			.isInstanceOf(BoardValidationException.class)
+			.hasFieldOrPropertyWithValue("error", "존재하지 않는 게시글입니다");
 
 	}
 
@@ -288,7 +291,7 @@ void updateBoardFailed_1() {
 		when(boardRepository.findById(1001L)).thenReturn(Optional.empty());
 		//when,then
 		assertThatThrownBy(() -> boardService.updateBoard(user, updateBoardRequest))
-			.isInstanceOf(BoardValidationExceoption.class)
+			.isInstanceOf(BoardValidationException.class)
 			.hasFieldOrPropertyWithValue("error", "존재하지 않는 게시글입니다");
 	}
 
@@ -320,4 +323,53 @@ void updateBoardFailed_3() {
 			.hasFieldOrPropertyWithValue("errors", "공지를 수정할 수 있는 권한이 없습니다");
 	}
 
+	@Test
+	@DisplayName("공지 삭제 성공")
+	void deleteBoardSuccess() {
+		//given
+		when(boardRepository.findById(1000L)).thenReturn(Optional.ofNullable(board));
+		when(studyGroupRepository.findById(30L)).thenReturn(Optional.ofNullable(studyGroup));
+		doNothing().when(boardCommentRepository).deleteAllCommentByBoard(board);
+		//when
+		boardService.deleteBoard(user, 1000L);
+		//then
+		verify(boardRepository, times(1)).delete(board);
+	}
+
+	@Test
+	@DisplayName("공지 삭제 실패(존재하지 않는 게시글)")
+	void deleteBoardFailed_1() {
+		//given
+		when(boardRepository.findById(1001L)).thenReturn(Optional.empty());
+		//when,then
+		assertThatThrownBy(() -> boardService.deleteBoard(user, 1001L))
+			.isInstanceOf(BoardValidationException.class)
+			.hasFieldOrPropertyWithValue("error", "존재하지 않는 게시글입니다");
+	}
+
+	@Test
+	@DisplayName("공지 삭제 실패(존재하지 않는 스터디 그룹)")
+	void deleteBoardFailed_2() {
+		//given
+		when(boardRepository.findById(1000L)).thenReturn(Optional.ofNullable(board));
+		when(studyGroupRepository.findById(30L)).thenReturn(Optional.empty());
+		//when,then
+		assertThatThrownBy(() -> boardService.deleteBoard(user, 1000L))
+			.isInstanceOf(StudyGroupValidationException.class)
+			.hasFieldOrPropertyWithValue("code", HttpStatus.BAD_REQUEST.value())
+			.hasFieldOrPropertyWithValue("error", "존재하지 않는 스터디 그룹입니다");
+	}
+
+	@Test
+	@DisplayName("공지 삭제 실패(게시글 작성자가 아님)")
+	void deleteBoardFailed_3() {
+		//given
+		when(boardRepository.findById(1000L)).thenReturn(Optional.ofNullable(board));
+		when(studyGroupRepository.findById(30L)).thenReturn(Optional.ofNullable(studyGroup));
+		//when, then
+		assertThatThrownBy(() -> boardService.deleteBoard(user4, 1000L))
+			.isInstanceOf(UserValidationException.class)
+			.hasFieldOrPropertyWithValue("errors", "공지를 삭제할 수 있는 권한이 없습니다");
+	}
+
 }