feat: 댓글 생성, 수정, 삭제

src/main/java/com/codeit/todo/common/exception/comment/CommentNotFoundException.java

@@ -0,0 +1,14 @@
+package com.codeit.todo.common.exception.comment;
+
+import com.codeit.todo.common.exception.EntityNotFoundException;
+
+public class CommentNotFoundException extends EntityNotFoundException {
+    private static final String ENTITY_TYPE = "comment";
+
+    /**
+     * @param request    엔티티를 찾기 위해 요청한 값
+     */
+    public CommentNotFoundException(String request) {
+        super(request, ENTITY_TYPE);
+    }
+}

src/main/java/com/codeit/todo/domain/Comment.java

@@ -2,6 +2,7 @@
 
 import jakarta.persistence.*;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -28,4 +29,17 @@ public class Comment {
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "complete_id", nullable = false)
     private Complete complete;
+
+    @Builder
+    public Comment(int commentId, String content, LocalDateTime createdAt, User user, Complete complete) {
+        this.commentId = commentId;
+        this.content = content;
+        this.createdAt = createdAt;
+        this.user = user;
+        this.complete = complete;
+    }
+
+    public void update(String content){
+        this.content = content;
+    }
 }

src/main/java/com/codeit/todo/repository/CommentRepository.java

@@ -0,0 +1,9 @@
+package com.codeit.todo.repository;
+
+
+import com.codeit.todo.domain.Comment;
+import org.springframework.data.jpa.repository.JpaRepository;
+public interface CommentRepository extends JpaRepository<Comment, Integer> {
+
+}
+

src/main/java/com/codeit/todo/service/comment/CommentService.java

@@ -0,0 +1,15 @@
+package com.codeit.todo.service.comment;
+
+import com.codeit.todo.web.dto.request.comment.CreateCommentRequest;
+import com.codeit.todo.web.dto.request.comment.UpdateCommentRequest;
+import com.codeit.todo.web.dto.response.comment.CreateCommentResponse;
+import com.codeit.todo.web.dto.response.comment.DeleteCommentResponse;
+import com.codeit.todo.web.dto.response.comment.UpdateCommentResponse;
+
+public interface CommentService {
+    CreateCommentResponse saveComment(int userId, CreateCommentRequest request);
+
+    UpdateCommentResponse updateComment(int userId, int commentId, UpdateCommentRequest request);
+
+    DeleteCommentResponse deleteComment(int userId, int commentId);
+}

src/main/java/com/codeit/todo/service/comment/impl/CommentServiceImpl.java

@@ -0,0 +1,74 @@
+package com.codeit.todo.service.comment.impl;
+
+import com.codeit.todo.common.exception.auth.AuthorizationDeniedException;
+import com.codeit.todo.common.exception.comment.CommentNotFoundException;
+import com.codeit.todo.common.exception.complete.CompleteNotFoundException;
+import com.codeit.todo.domain.Comment;
+import com.codeit.todo.domain.Complete;
+import com.codeit.todo.domain.User;
+import com.codeit.todo.repository.CommentRepository;
+import com.codeit.todo.repository.CompleteRepository;
+import com.codeit.todo.service.comment.CommentService;
+import com.codeit.todo.service.user.UserService;
+import com.codeit.todo.service.user.impl.UserServiceImpl;
+import com.codeit.todo.web.dto.request.comment.CreateCommentRequest;
+import com.codeit.todo.web.dto.request.comment.UpdateCommentRequest;
+import com.codeit.todo.web.dto.response.comment.CreateCommentResponse;
+import com.codeit.todo.web.dto.response.comment.DeleteCommentResponse;
+import com.codeit.todo.web.dto.response.comment.UpdateCommentResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class CommentServiceImpl implements CommentService {
+
+    private final UserServiceImpl userServiceImpl;
+    private final CompleteRepository completeRepository;
+    private final CommentRepository commentRepository;
+
+    @Transactional
+    @Override
+    public CreateCommentResponse saveComment(int userId, CreateCommentRequest request) {
+
+        User user = userServiceImpl.getUser(userId);
+        Complete complete = completeRepository.findById(request.completeId())
+                .orElseThrow(()-> new CompleteNotFoundException(String.valueOf(request.completeId())));
+
+        Comment comment = request.toEntity(request.content(), user, complete);
+        Comment savedComment = commentRepository.save(comment);
+        return CreateCommentResponse.fromEntity(savedComment);
+    }
+
+    @Transactional
+    @Override
+    public UpdateCommentResponse updateComment(int userId, int commentId, UpdateCommentRequest request) {
+        Comment comment = getComment(userId, commentId);
+        comment.update(request.content());
+
+        return UpdateCommentResponse.fromEntity(comment);
+    }
+
+    @Transactional
+    @Override
+    public DeleteCommentResponse deleteComment(int userId, int commentId) {
+        Comment comment = getComment(userId, commentId);
+        commentRepository.delete(comment);
+        return DeleteCommentResponse.from(commentId);
+    }
+
+    private Comment getComment(int userId, int commentId){
+        Comment comment = commentRepository.findById(commentId)
+                .orElseThrow(()-> new CommentNotFoundException(String.valueOf(commentId)));
+
+        if(comment.getUser().getUserId() != userId){
+            log.error("댓글 작업 거부됨. 요청 유저 ID : {}", userId);
+            throw new AuthorizationDeniedException("댓글 작업에 대한 권한이 없습니다.");
+        }
+
+        return comment;
+    }
+}

src/main/java/com/codeit/todo/service/user/impl/UserServiceImpl.java

@@ -162,7 +162,7 @@ public ReadMyPageResponse findUserInfoAndFollows(int userId) {
         return ReadMyPageResponse.from(followerCount, followeeCount);
     }
 
-    private User getUser(int userId){
+    public User getUser(int userId){
         User user = userRepository.findById(userId)
                 .orElseThrow(()-> new UserNotFoundException(String.valueOf(userId), "User"));
         return user;

src/main/java/com/codeit/todo/web/controller/CommentController.java

@@ -0,0 +1,65 @@
+package com.codeit.todo.web.controller;
+
+import com.codeit.todo.repository.CustomUserDetails;
+import com.codeit.todo.service.comment.CommentService;
+import com.codeit.todo.web.dto.request.comment.CreateCommentRequest;
+import com.codeit.todo.web.dto.request.comment.UpdateCommentRequest;
+import com.codeit.todo.web.dto.response.Response;
+import com.codeit.todo.web.dto.response.comment.CreateCommentResponse;
+import com.codeit.todo.web.dto.response.comment.DeleteCommentResponse;
+import com.codeit.todo.web.dto.response.comment.UpdateCommentResponse;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/api/v1/comments")
+public class CommentController {
+
+    private final CommentService commentService;
+
+    @Operation(summary = "댓글 생성", description = "새로운 댓글 생성 API")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "댓글 생성 성공")
+    })
+    @PostMapping
+    public Response<CreateCommentResponse> createComment(
+            @AuthenticationPrincipal CustomUserDetails customUserDetails,
+            @Valid @RequestBody CreateCommentRequest request
+            ){
+        int userId = customUserDetails.getUserId();
+        return Response.ok(commentService.saveComment(userId, request));
+    }
+
+    @Operation(summary = "댓글 수정", description = "댓글 내용 수정 API")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "수정 성공")
+    })
+    @PutMapping("{commentId}")
+    public Response<UpdateCommentResponse> updateComment(
+            @PathVariable int commentId,
+            @AuthenticationPrincipal CustomUserDetails customUserDetails,
+            @Valid @RequestBody UpdateCommentRequest request
+    ){
+        int userId = customUserDetails.getUserId();
+        return Response.ok(commentService.updateComment(userId, commentId, request));
+    }
+
+    @Operation(summary = "댓글 삭제", description = "댓글 삭제 API")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "삭제 성공")
+    })
+    @DeleteMapping("{commentId}")
+    public Response<DeleteCommentResponse> deleteComment(
+            @PathVariable int commentId,
+            @AuthenticationPrincipal CustomUserDetails customUserDetails
+    ){
+        int userId = customUserDetails.getUserId();
+        return Response.ok(commentService.deleteComment(userId, commentId));
+    }
+}

src/main/java/com/codeit/todo/web/dto/request/comment/CreateCommentRequest.java

@@ -0,0 +1,22 @@
+package com.codeit.todo.web.dto.request.comment;
+
+import com.codeit.todo.domain.*;
+import jakarta.validation.constraints.NotNull;
+
+
+import java.time.LocalDateTime;
+
+public record CreateCommentRequest(
+        int completeId,
+        @NotNull
+        String content
+) {
+        public Comment toEntity(String content, User user, Complete complete) {
+                return Comment.builder()
+                        .content(content)
+                        .createdAt(LocalDateTime.now())
+                        .user(user)
+                        .complete(complete)
+                        .build();
+        }
+}

src/main/java/com/codeit/todo/web/dto/request/comment/UpdateCommentRequest.java

@@ -0,0 +1,10 @@
+package com.codeit.todo.web.dto.request.comment;
+
+import com.codeit.todo.domain.Comment;
+import com.codeit.todo.domain.Complete;
+import com.codeit.todo.domain.User;
+import jakarta.validation.constraints.NotNull;
+
+import java.time.LocalDateTime;
+
+public record UpdateCommentRequest( @NotNull String content) {}

src/main/java/com/codeit/todo/web/dto/response/comment/CreateCommentResponse.java

@@ -0,0 +1,16 @@
+package com.codeit.todo.web.dto.response.comment;
+
+import com.codeit.todo.domain.Comment;
+import com.codeit.todo.domain.Goal;
+import lombok.Builder;
+
+@Builder
+public record CreateCommentResponse(int commentId ) {
+
+    public static CreateCommentResponse fromEntity(Comment savedComment) {
+        return CreateCommentResponse.builder()
+                .commentId(savedComment.getCommentId())
+                .build();
+    }
+
+}

src/main/java/com/codeit/todo/web/dto/response/comment/DeleteCommentResponse.java

@@ -0,0 +1,15 @@
+package com.codeit.todo.web.dto.response.comment;
+
+import com.codeit.todo.domain.Comment;
+import lombok.Builder;
+
+@Builder
+public record DeleteCommentResponse(int commentId) {
+
+    public static DeleteCommentResponse from(int commentId) {
+        return DeleteCommentResponse.builder()
+                .commentId(commentId)
+                .build();
+    }
+
+}

src/main/java/com/codeit/todo/web/dto/response/comment/UpdateCommentResponse.java

@@ -0,0 +1,15 @@
+package com.codeit.todo.web.dto.response.comment;
+
+import com.codeit.todo.domain.Comment;
+import lombok.Builder;
+
+@Builder
+public record UpdateCommentResponse(int commentId) {
+
+    public static UpdateCommentResponse fromEntity(Comment comment) {
+        return UpdateCommentResponse.builder()
+                .commentId(comment.getCommentId())
+                .build();
+    }
+
+}