Merge pull request #136 from CSID-DGU/backend/feature/crew

BE: [feat] 갤러리 댓글 달기 #83

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/gallery/comment/dto/CrewPostCommentRequestDto.java

@@ -0,0 +1,12 @@
+package RunningMachines.R2R.domain.crew.post.gallery.comment.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+public class CrewPostCommentRequestDto {
+    private String content;
+}

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/gallery/comment/dto/CrewPostCommentResponseDto.java

@@ -0,0 +1,16 @@
+package RunningMachines.R2R.domain.crew.post.gallery.comment.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+@AllArgsConstructor
+public class CrewPostCommentResponseDto {
+    private Long commentId;
+    private String content;
+    private String authorName;
+    private String authorProfile;
+    private String createdAt;
+}

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/gallery/comment/repository/CrewPostCommentRepository.java

@@ -0,0 +1,7 @@
+package RunningMachines.R2R.domain.crew.post.gallery.comment.repository;
+
+import RunningMachines.R2R.domain.crew.post.entity.CrewPostComment;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CrewPostCommentRepository extends JpaRepository<CrewPostComment, Long> {
+}

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/gallery/comment/service/CrewPostCommentService.java

@@ -0,0 +1,52 @@
+package RunningMachines.R2R.domain.crew.post.gallery.comment.service;
+
+import RunningMachines.R2R.domain.crew.common.entity.Crew;
+import RunningMachines.R2R.domain.crew.common.repository.CrewRepository;
+import RunningMachines.R2R.domain.crew.post.entity.CrewPost;
+import RunningMachines.R2R.domain.crew.post.entity.CrewPostComment;
+import RunningMachines.R2R.domain.crew.post.gallery.comment.dto.CrewPostCommentRequestDto;
+import RunningMachines.R2R.domain.crew.post.gallery.comment.dto.CrewPostCommentResponseDto;
+import RunningMachines.R2R.domain.crew.post.gallery.comment.repository.CrewPostCommentRepository;
+import RunningMachines.R2R.domain.crew.post.repository.CrewPostRepository;
+import RunningMachines.R2R.domain.user.entity.User;
+import RunningMachines.R2R.domain.user.service.AuthCommandService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.format.DateTimeFormatter;
+
+@Service
+@RequiredArgsConstructor
+public class CrewPostCommentService {
+    private final CrewPostRepository crewPostRepository;
+    private final CrewPostCommentRepository crewPostCommentRepository;
+    private final CrewRepository crewRepository;
+    private final AuthCommandService authCommandService;
+
+    @Transactional
+    public Long createComment(Long crewId, Long postId, CrewPostCommentRequestDto requestDto) {
+        User currentUser = authCommandService.getCurrentUser();
+
+        CrewPost crewPost = crewPostRepository.findById(postId)
+                .orElseThrow(() -> new IllegalArgumentException("게시글을 찾을 수 없습니다."));
+        Crew crew = crewRepository.findById(crewId)
+                .orElseThrow(() -> new IllegalArgumentException("크루를 찾을 수 없습니다."));
+
+        boolean isMember = crew.getCrewUsers().stream()
+                .anyMatch(crewUser -> crewUser.getUser().equals(currentUser));
+        if (!isMember) {
+            throw new IllegalArgumentException("댓글 작성은 크루 유저만 가능합니다.");
+        }
+
+        CrewPostComment comment = CrewPostComment.builder()
+                .content(requestDto.getContent())
+                .crewPost(crewPost)
+                .user(currentUser)
+                .build();
+        CrewPostComment savedComment = crewPostCommentRepository.save(comment);
+
+        return savedComment.getId();
+    }
+
+}

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/gallery/controller/GalleryPostController.java

@@ -1,5 +1,9 @@
 package RunningMachines.R2R.domain.crew.post.gallery.controller;
 
+import RunningMachines.R2R.domain.crew.post.gallery.comment.dto.CrewPostCommentRequestDto;
+import RunningMachines.R2R.domain.crew.post.gallery.comment.dto.CrewPostCommentResponseDto;
+import RunningMachines.R2R.domain.crew.post.gallery.comment.repository.CrewPostCommentRepository;
+import RunningMachines.R2R.domain.crew.post.gallery.comment.service.CrewPostCommentService;
 import RunningMachines.R2R.domain.crew.post.gallery.dto.GalleryPostCreateRequestDto;
 import RunningMachines.R2R.domain.crew.post.gallery.dto.GalleryPostDetailResponseDto;
 import RunningMachines.R2R.domain.crew.post.gallery.dto.GalleryPreviewResponseDto;
@@ -21,6 +25,8 @@ public class GalleryPostController {
     private final GalleryPostCommandService galleryPostCommandService;
     private final GalleryPostQueryService galleryPostQueryService;
     private final GalleryPostLikeService galleryPostLikeService;
+    private final CrewPostCommentRepository crewPostCommentRepository;
+    private final CrewPostCommentService crewPostCommentService;
 
     @PostMapping
     public ResponseEntity<Long> createGalleryPost(@PathVariable Long crewId, @RequestPart("content") GalleryPostCreateRequestDto contentDto, @RequestPart("images") List<MultipartFile> images) {
@@ -45,4 +51,10 @@ public ResponseEntity<Void> likeGalleryPost(@PathVariable Long crewId, @PathVari
         galleryPostLikeService.likeGalleryPost(crewId, crewPostId);
         return ResponseEntity.ok().build();
     }
+
+    @PostMapping("/{postId}/comments")
+    public ResponseEntity<Long> createComment(@PathVariable Long crewId, @PathVariable Long postId, @RequestBody CrewPostCommentRequestDto requestDto) {
+        Long commentId = crewPostCommentService.createComment(crewId, postId, requestDto);
+        return ResponseEntity.ok(commentId);
+    }
 }