Merge remote-tracking branch 'origin/develop' into develop

src/main/java/com/unit/daybook/domain/board/entity/Board.java

@@ -3,6 +3,8 @@
 import com.unit.daybook.domain.board.dto.request.AddBoardRequestDto;
 import com.unit.daybook.domain.common.model.BaseTimeEntity;
 import com.unit.daybook.domain.member.domain.Member;
+import com.unit.daybook.domain.reaction.entity.Reaction;
+
 import jakarta.persistence.*;
 import lombok.*;
 
@@ -43,6 +45,9 @@ public class Board extends BaseTimeEntity {
     @OneToMany(mappedBy = "board", cascade = CascadeType.ALL)
     private List<Hashtag> hashtags = new ArrayList<>();
 
+    @OneToMany(mappedBy = "board", cascade = CascadeType.REMOVE)
+    private List<Reaction> reactions = new ArrayList<>();
+
     @Builder(access = AccessLevel.PRIVATE)
     public Board(Long boardId, String content, Long respectBoardId, Member member, String category, Long hearts, String paperType) {
         this.boardId = boardId;

src/main/java/com/unit/daybook/domain/member/domain/Member.java

@@ -6,6 +6,7 @@
 
 import com.unit.daybook.domain.board.entity.Board;
 import com.unit.daybook.domain.common.model.BaseTimeEntity;
+import com.unit.daybook.domain.reaction.entity.Reaction;
 
 import jakarta.persistence.*;
 import lombok.AccessLevel;

src/main/java/com/unit/daybook/domain/reaction/controller/ReactionController.java

@@ -0,0 +1,35 @@
+package com.unit.daybook.domain.reaction.controller;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.unit.daybook.domain.common.annotation.LoginUsers;
+import com.unit.daybook.domain.reaction.dto.request.ReactionCreateRequest;
+import com.unit.daybook.domain.reaction.dto.response.ReactionCreateResponse;
+import com.unit.daybook.domain.reaction.service.ReactionService;
+import com.unit.daybook.global.config.security.CustomUserDetails;
+
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@RequestMapping("/reactions")
+@RequiredArgsConstructor
+public class ReactionController {
+
+	private final ReactionService reactionService;
+
+	@PostMapping
+	public ResponseEntity<ReactionCreateResponse> reactionCreate(
+		@Valid @RequestBody ReactionCreateRequest request,
+		@LoginUsers CustomUserDetails userDetails
+	) {
+		ReactionCreateResponse reaction = reactionService.createReaction(request, userDetails.getMemberId());
+		return ResponseEntity.status(HttpStatus.CREATED).body(reaction);
+	}
+}

src/main/java/com/unit/daybook/domain/reaction/dto/request/ReactionCreateRequest.java

@@ -0,0 +1,9 @@
+package com.unit.daybook.domain.reaction.dto.request;
+
+import com.unit.daybook.domain.reaction.entity.ReactionType;
+
+public record ReactionCreateRequest(
+	Long boardId,
+	ReactionType reactionType
+) {
+}

src/main/java/com/unit/daybook/domain/reaction/dto/response/ReactionCreateResponse.java

@@ -0,0 +1,21 @@
+package com.unit.daybook.domain.reaction.dto.response;
+
+import com.unit.daybook.domain.reaction.entity.Reaction;
+import com.unit.daybook.domain.reaction.entity.ReactionType;
+
+public record ReactionCreateResponse(
+	Long reactionId,
+	ReactionType reactionType,
+	Long memberId,
+	Long boardId
+) {
+	public static ReactionCreateResponse from(Reaction reaction) {
+		return new ReactionCreateResponse(
+			reaction.getId(),
+			reaction.getReactionType(),
+			reaction.getMember().getId(),
+			reaction.getBoard().getBoardId()
+		);
+	}
+
+}

src/main/java/com/unit/daybook/domain/reaction/entity/Reaction.java

@@ -1,7 +1,11 @@
 package com.unit.daybook.domain.reaction.entity;
 
+import com.unit.daybook.domain.board.entity.Board;
+import com.unit.daybook.domain.member.domain.Member;
+
 import jakarta.persistence.*;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -15,9 +19,37 @@ public class Reaction {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "reaction_id")
-    private Long reactionId;
+    private Long id;
+
+    @Enumerated(EnumType.STRING)
+    private ReactionType reactionType;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    private Member member;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "board_id")
+    private Board board;
+
+    @Builder(access = AccessLevel.PRIVATE)
+    private Reaction(ReactionType reactionType, Member member, Board board) {
+        this.reactionType = reactionType;
+        this.member = member;
+        this.board = board;
+    }
 
-    @Column
-    private String content;
+    public static Reaction createReaction(
+        ReactionType reactionType, Member member, Board board
+    ) {
+        return Reaction.builder()
+            .reactionType(reactionType)
+            .member(member)
+            .board(board)
+            .build();
+    }
 
+    public void updateReaction(ReactionType reactionType) {
+        this.reactionType = reactionType;
+    }
 }

src/main/java/com/unit/daybook/domain/reaction/entity/ReactionType.java

@@ -0,0 +1,13 @@
+package com.unit.daybook.domain.reaction.entity;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public enum ReactionType {
+	MOVING,
+	ADMIRE,
+	GREAT,
+	;
+}

src/main/java/com/unit/daybook/domain/reaction/repository/ReactionRepository.java

@@ -0,0 +1,8 @@
+package com.unit.daybook.domain.reaction.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.unit.daybook.domain.reaction.entity.Reaction;
+
+public interface ReactionRepository extends JpaRepository<Reaction, Long>, ReactionRepositoryCustom {
+}

src/main/java/com/unit/daybook/domain/reaction/repository/ReactionRepositoryCustom.java

@@ -0,0 +1,10 @@
+package com.unit.daybook.domain.reaction.repository;
+
+import com.unit.daybook.domain.board.entity.Board;
+import com.unit.daybook.domain.member.domain.Member;
+import com.unit.daybook.domain.reaction.entity.Reaction;
+
+public interface ReactionRepositoryCustom {
+
+	Reaction findReactionByMemberAndBoard(Member member, Board board);
+}

src/main/java/com/unit/daybook/domain/reaction/repository/ReactionRepositoryImpl.java

@@ -0,0 +1,28 @@
+package com.unit.daybook.domain.reaction.repository;
+
+import static com.unit.daybook.domain.reaction.entity.QReaction.*;
+
+import org.springframework.stereotype.Repository;
+
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import com.unit.daybook.domain.board.entity.Board;
+import com.unit.daybook.domain.member.domain.Member;
+import com.unit.daybook.domain.reaction.entity.Reaction;
+
+import lombok.RequiredArgsConstructor;
+
+@Repository
+@RequiredArgsConstructor
+public class ReactionRepositoryImpl implements ReactionRepositoryCustom {
+
+	private final JPAQueryFactory jpaQueryFactory;
+
+	@Override
+	public Reaction findReactionByMemberAndBoard(Member member, Board board) {
+		return jpaQueryFactory.selectFrom(reaction)
+			.where(
+				reaction.board.boardId.eq(board.getBoardId()),
+				reaction.member.id.eq(member.getId()))
+			.fetchOne();
+	}
+}

src/main/java/com/unit/daybook/domain/reaction/service/ReactionService.java

@@ -0,0 +1,50 @@
+package com.unit.daybook.domain.reaction.service;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.unit.daybook.domain.board.entity.Board;
+import com.unit.daybook.domain.board.repository.BoardRepository;
+import com.unit.daybook.domain.member.domain.Member;
+import com.unit.daybook.domain.member.repository.MemberRepository;
+import com.unit.daybook.domain.reaction.dto.request.ReactionCreateRequest;
+import com.unit.daybook.domain.reaction.dto.response.ReactionCreateResponse;
+import com.unit.daybook.domain.reaction.entity.Reaction;
+import com.unit.daybook.domain.reaction.repository.ReactionRepository;
+import com.unit.daybook.global.error.exception.CustomException;
+import com.unit.daybook.global.error.exception.ErrorCode;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class ReactionService {
+
+	private final ReactionRepository reactionRepository;
+	private final MemberRepository memberRepository;
+	private final BoardRepository boardRepository;
+
+	public ReactionCreateResponse createReaction(ReactionCreateRequest request, Long memberId) {
+		final Member member = findMemberById(memberId);
+		Board board = boardRepository.findById(request.boardId())
+			.orElseThrow(() -> new CustomException(ErrorCode.BOARD_NOT_FOUND));
+
+		validateReactionMemberMatching(member, board);
+
+		Reaction reaction = Reaction.createReaction(request.reactionType(), member, board);
+		return ReactionCreateResponse.from(reactionRepository.save(reaction));
+	}
+
+	private void validateReactionMemberMatching(Member member, Board board) {
+		Reaction reaction = reactionRepository.findReactionByMemberAndBoard(member, board);
+		if (reaction != null) {
+			throw new CustomException(ErrorCode.REACTION_EXISTS);
+		}
+	}
+
+	private Member findMemberById(Long memberId) {
+		return memberRepository.findById(memberId)
+			.orElseThrow(() -> new CustomException(ErrorCode.MEMBER_NOT_FOUND));
+	}
+}

src/main/java/com/unit/daybook/global/error/exception/ErrorCode.java

@@ -22,7 +22,13 @@ public enum ErrorCode {
 	EXPIRED_REFRESH_TOKEN(HttpStatus.FORBIDDEN, "리프레시 토큰이 만료되었습니다."),
 
 	// Member
-	MEMBER_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 회원입니다.");
+	MEMBER_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 회원입니다."),
+
+	// Board
+	BOARD_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 일지입니다."),
+
+	// Reaction
+	REACTION_EXISTS(HttpStatus.CONFLICT, "이미 리액션을 하였습니다.");
 	private final HttpStatus status;
 	private final String message;
 }