Feature: Post 삭제 및 모든 좋아요 기능, 조회수 기능, 투표 기능 구현(#46)

backend/src/main/java/aimo/backend/common/mapper/PostMapper.java

@@ -4,8 +4,7 @@
 
 import aimo.backend.domains.comment.entity.ParentComment;
 import aimo.backend.domains.member.entity.Member;
-import aimo.backend.domains.post.dto.PostPreviewResponse;
-import aimo.backend.domains.post.dto.SavePostRequest;
+import aimo.backend.domains.post.dto.requset.SavePostRequest;
 import aimo.backend.domains.post.dto.response.FindPostAndCommentsByIdResponse;
 import aimo.backend.domains.post.dto.response.FindPostAndCommentsByIdResponse.ParentCommentDto;
 import aimo.backend.domains.post.dto.response.FindPostsByPostTypeResponse;
@@ -30,18 +29,6 @@ public static Post toEntity(SavePostRequest request, Member member) {
 			.build();
 	}
 
-	public static PostPreviewResponse toPreviewResponse(Post post) {
-		return new PostPreviewResponse(
-			post.getId(),
-			post.getTitle(),
-			getPreview(post.getSummaryAi()),
-			post.getPostLikes().size(),
-			post.getPostViews().size(),
-			post.getCommentsCount(),
-			post.getCreatedAt()
-		);
-	}
-
 	private static String getPreview(String summaryAi) {
 		return summaryAi.length() > PREVIEW_CONTENT_LENGTH ?
 			summaryAi.substring(0, PREVIEW_CONTENT_LENGTH) + "..." : summaryAi;

backend/src/main/java/aimo/backend/domains/comment/controller/ChildCommentController.java

@@ -11,6 +11,7 @@
 
 import aimo.backend.common.dto.DataResponse;
 import aimo.backend.domains.comment.dto.request.SaveChildCommentRequest;
+import aimo.backend.domains.like.service.ChildCommentLikeService;
 import aimo.backend.domains.comment.service.ChildCommentService;
 import aimo.backend.domains.member.entity.Member;
 import aimo.backend.util.memberLoader.MemberLoader;
@@ -24,6 +25,7 @@ public class ChildCommentController {
 
 	private final ChildCommentService childCommentService;
 	private final MemberLoader memberLoader;
+	private final ChildCommentLikeService childCommentLikeService;
 
 	@PostMapping("/{postId}/comments/{parentCommentId}/child")
 	public ResponseEntity<DataResponse<Void>> saveChildComment(

backend/src/main/java/aimo/backend/domains/comment/entity/ChildComment.java

@@ -7,6 +7,7 @@
 
 import aimo.backend.common.entity.BaseEntity;
 import aimo.backend.domains.comment.costants.CommentConstants;
+import aimo.backend.domains.like.entity.ChildCommentLike;
 import aimo.backend.domains.member.entity.Member;
 import aimo.backend.domains.post.entity.Post;
 import jakarta.persistence.Column;

backend/src/main/java/aimo/backend/domains/comment/entity/ParentComment.java

@@ -6,6 +6,7 @@
 
 import aimo.backend.common.entity.BaseEntity;
 import aimo.backend.domains.comment.costants.CommentConstants;
+import aimo.backend.domains.like.entity.ParentCommentLike;
 import aimo.backend.domains.member.entity.Member;
 import aimo.backend.domains.post.entity.Post;
 import jakarta.persistence.*;

backend/src/main/java/aimo/backend/domains/comment/service/ChildCommentService.java

@@ -2,8 +2,6 @@
 
 import static aimo.backend.common.exception.ErrorCode.*;
 
-import java.util.List;
-
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -67,4 +65,10 @@ public void validateAndDeleteChildComment(Member member, Long childCommentId) {
 		childCommentRepository.findById(childCommentId)
 			.ifPresent(ChildComment::deleteChildCommentSoftly);
 	}
+
+	// id로 자식 댓글 조회
+	public ChildComment findById(Long childCommentId) {
+		return childCommentRepository.findById(childCommentId)
+			.orElseThrow(() -> ApiException.from(CHILD_COMMENT_NOT_FOUND));
+	}
 }

backend/src/main/java/aimo/backend/domains/like/controller/LikeController.java

@@ -0,0 +1,61 @@
+package aimo.backend.domains.like.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import aimo.backend.common.dto.DataResponse;
+import aimo.backend.domains.like.model.LikeType;
+import aimo.backend.domains.like.service.ChildCommentLikeService;
+import aimo.backend.domains.like.service.ParentCommentLikeService;
+import aimo.backend.domains.like.service.PostLikeService;
+import aimo.backend.domains.member.entity.Member;
+import aimo.backend.util.memberLoader.MemberLoader;
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@RequestMapping("/api/v1/")
+@RequiredArgsConstructor
+public class LikeController {
+
+	private final PostLikeService postLikeService;
+	private final MemberLoader memberLoader;
+	private final ChildCommentLikeService childCommentLikeService;
+	private final ParentCommentLikeService parentCommentLikeService;
+
+	@PostMapping("/{postId}/likes")
+	public ResponseEntity<DataResponse<Void>> likePost(
+		@PathVariable Long postId,
+		@RequestParam("likeType") LikeType likeType
+	) {
+		Member member = memberLoader.getMember();
+		postLikeService.likePost(member, postId, likeType);
+
+		return ResponseEntity.ok(DataResponse.noContent());
+	}
+
+	@PostMapping("/comments/child/{childCommentId}/like")
+	public ResponseEntity<DataResponse<Void>> likeChildComment(
+		@PathVariable Long childCommentId,
+		@RequestParam("likeType") LikeType likeType
+	) {
+		Member member = memberLoader.getMember();
+		childCommentLikeService.likeChildComment(member, childCommentId, likeType);
+
+		return ResponseEntity.ok(DataResponse.ok());
+	}
+
+	@PostMapping("/comments/{parentCommentId}/like")
+	public ResponseEntity<DataResponse<Void>> likeParentComment(
+		@PathVariable Long parentCommentId,
+		@RequestParam("likeType") LikeType likeType
+	) {
+		Member member = memberLoader.getMember();
+		parentCommentLikeService.likeParentComment(member, parentCommentId, likeType);
+
+		return ResponseEntity.ok(DataResponse.ok());
+	}
+}

backend/src/main/java/aimo/backend/domains/comment/entity/ChildCommentLike.java → backend/src/main/java/aimo/backend/domains/like/entity/ChildCommentLike.java

@@ -1,15 +1,16 @@
-package aimo.backend.domains.comment.entity;
+package aimo.backend.domains.like.entity;
 
 import static lombok.AccessLevel.*;
 
-import aimo.backend.common.entity.Like;
-import aimo.backend.domains.post.entity.Post;
+import aimo.backend.domains.comment.entity.ChildComment;
+import aimo.backend.domains.member.entity.Member;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
 import jakarta.persistence.UniqueConstraint;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -26,4 +27,10 @@ public class ChildCommentLike extends Like {
 	@ManyToOne(fetch = FetchType.LAZY)
 	@JoinColumn(name = "child_comment_id")
 	private ChildComment childComment;
+
+	@Builder
+	private ChildCommentLike(Member member, ChildComment childComment) {
+		super(member);
+		this.childComment = childComment;
+	}
 }

backend/src/main/java/aimo/backend/common/entity/Like.java → backend/src/main/java/aimo/backend/domains/like/entity/Like.java

@@ -1,9 +1,10 @@
-package aimo.backend.common.entity;
+package aimo.backend.domains.like.entity;
 
 import static jakarta.persistence.GenerationType.*;
 
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
+import aimo.backend.common.entity.BaseEntity;
 import aimo.backend.domains.member.entity.Member;
 import jakarta.persistence.Column;
 import jakarta.persistence.EntityListeners;
@@ -30,4 +31,8 @@ public abstract class Like extends BaseEntity {
 	@ManyToOne(fetch = FetchType.LAZY)
 	@JoinColumn(name = "member_id", nullable = false)
 	private Member member;
+
+	public Like(Member member) {
+		this.member = member;
+	}
 }

backend/src/main/java/aimo/backend/domains/comment/entity/ParentCommentLike.java → backend/src/main/java/aimo/backend/domains/like/entity/ParentCommentLike.java

@@ -1,15 +1,16 @@
-package aimo.backend.domains.comment.entity;
+package aimo.backend.domains.like.entity;
 
 import static lombok.AccessLevel.*;
 
-import aimo.backend.common.entity.Like;
-import aimo.backend.domains.post.entity.Post;
+import aimo.backend.domains.comment.entity.ParentComment;
+import aimo.backend.domains.member.entity.Member;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
 import jakarta.persistence.UniqueConstraint;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -26,4 +27,10 @@ public class ParentCommentLike extends Like {
 	@ManyToOne(fetch = FetchType.LAZY)
 	@JoinColumn(name = "parent_comment_id")
 	private ParentComment parentComment;
+
+	@Builder
+	private ParentCommentLike(Member member, ParentComment parentComment) {
+		super(member);
+		this.parentComment = parentComment;
+	}
 }

backend/src/main/java/aimo/backend/domains/post/entity/PostLike.java → backend/src/main/java/aimo/backend/domains/like/entity/PostLike.java

@@ -1,14 +1,16 @@
-package aimo.backend.domains.post.entity;
+package aimo.backend.domains.like.entity;
 
 import static lombok.AccessLevel.*;
 
-import aimo.backend.common.entity.Like;
+import aimo.backend.domains.member.entity.Member;
+import aimo.backend.domains.post.entity.Post;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
 import jakarta.persistence.UniqueConstraint;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -25,4 +27,10 @@ public class PostLike extends Like {
 	@ManyToOne(fetch = FetchType.LAZY)
 	@JoinColumn(name = "post_id")
 	private Post post;
+
+	@Builder
+	private PostLike(Post post, Member member) {
+		super(member);
+		this.post = post;
+	}
 }

backend/src/main/java/aimo/backend/domains/like/model/LikeType.java

@@ -0,0 +1,12 @@
+package aimo.backend.domains.like.model;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public enum LikeType {
+	LIKE("좋아요"),
+	CANCEL_LIKE("좋아요 취소")
+	;
+
+	private final String value;
+}

backend/src/main/java/aimo/backend/domains/like/repository/ChildCommentLikeRepository.java

@@ -0,0 +1,12 @@
+package aimo.backend.domains.like.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import aimo.backend.domains.like.entity.ChildCommentLike;
+
+public interface ChildCommentLikeRepository extends JpaRepository<ChildCommentLike, Long> {
+
+	void deleteByMember_IdAndChildComment_Id(Long id, Long childCommentId);
+
+	boolean existsByChildComment_IdAndMember_Id(Long childCommentId, Long id);
+}

backend/src/main/java/aimo/backend/domains/like/repository/ParentCommentLikeRepository.java

@@ -0,0 +1,12 @@
+package aimo.backend.domains.like.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import aimo.backend.domains.like.entity.ParentCommentLike;
+
+public interface ParentCommentLikeRepository extends JpaRepository<ParentCommentLike, Long> {
+
+	void deleteByParentComment_Id(Long id, Long parentCommentId);
+
+	Boolean existsByParentComment_IdAndMember_Id(Long parentCommentId, Long memberId);
+}

backend/src/main/java/aimo/backend/domains/like/repository/PostLikeRepository.java

@@ -0,0 +1,12 @@
+package aimo.backend.domains.like.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import aimo.backend.domains.like.entity.PostLike;
+
+public interface PostLikeRepository extends JpaRepository<PostLike, Long> {
+
+	void deleteByMember_IdAndPost_Id(Long id, Long postId);
+
+	boolean existsByPost_IdAndMember_Id(Long postId, Long memberId);
+}

backend/src/main/java/aimo/backend/domains/like/service/ChildCommentLikeService.java

@@ -0,0 +1,39 @@
+package aimo.backend.domains.like.service;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import aimo.backend.domains.comment.entity.ChildComment;
+import aimo.backend.domains.comment.service.ChildCommentService;
+import aimo.backend.domains.like.entity.ChildCommentLike;
+import aimo.backend.domains.like.model.LikeType;
+import aimo.backend.domains.like.repository.ChildCommentLikeRepository;
+import aimo.backend.domains.member.entity.Member;
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class ChildCommentLikeService {
+
+	private final ChildCommentLikeRepository childCommentLikeRepository;
+	private final ChildCommentService childCommentService;
+
+	public void likeChildComment(Member member, Long childCommentId, LikeType likeType) {
+		ChildComment childComment = childCommentService.findById(childCommentId);
+
+		if (likeType == LikeType.LIKE) {
+			// 라이크가 이미 존재하면 무시
+			if (childCommentLikeRepository.existsByChildComment_IdAndMember_Id(childCommentId, member.getId())) {
+				return;
+			}
+
+			childCommentLikeRepository.save(ChildCommentLike.builder()
+				.childComment(childComment)
+				.member(member)
+				.build());
+		} else {
+			childCommentLikeRepository.deleteByMember_IdAndChildComment_Id(member.getId(), childCommentId);
+		}
+	}
+}

backend/src/main/java/aimo/backend/domains/like/service/ParentCommentLikeService.java

@@ -0,0 +1,39 @@
+package aimo.backend.domains.like.service;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import aimo.backend.domains.comment.entity.ParentComment;
+import aimo.backend.domains.comment.service.ParentCommentService;
+import aimo.backend.domains.like.entity.ParentCommentLike;
+import aimo.backend.domains.like.model.LikeType;
+import aimo.backend.domains.like.repository.ParentCommentLikeRepository;
+import aimo.backend.domains.member.entity.Member;
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class ParentCommentLikeService {
+
+	private final ParentCommentLikeRepository parentCommentLikeRepository;
+	private final ParentCommentService parentCommentService;
+
+	public void likeParentComment(Member member, Long parentCommentId, LikeType likeType) {
+		ParentComment parentComment = parentCommentService.findById(parentCommentId);
+
+		if (likeType == LikeType.LIKE) {
+			// 라이크가 이미 존재하면 무시
+			if (parentCommentLikeRepository.existsByParentComment_IdAndMember_Id(parentCommentId, member.getId())) {
+				return;
+			}
+
+			parentCommentLikeRepository.save(ParentCommentLike.builder()
+				.parentComment(parentComment)
+				.member(member)
+				.build());
+		} else {
+			parentCommentLikeRepository.deleteByParentComment_Id(member.getId(), parentCommentId);
+		}
+	}
+}