Merge pull request #134 from CSID-DGU/backend/feature/crew

BE: [feat] 갤러리 좋아요 #83

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

@@ -2,7 +2,9 @@
 
 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;
 import RunningMachines.R2R.domain.crew.post.gallery.service.GalleryPostCommandService;
+import RunningMachines.R2R.domain.crew.post.gallery.service.GalleryPostLikeService;
 import RunningMachines.R2R.domain.crew.post.gallery.service.GalleryPostQueryService;
 import RunningMachines.R2R.domain.crew.post.repository.CrewPostRepository;
 import lombok.RequiredArgsConstructor;
@@ -18,6 +20,7 @@
 public class GalleryPostController {
     private final GalleryPostCommandService galleryPostCommandService;
     private final GalleryPostQueryService galleryPostQueryService;
+    private final GalleryPostLikeService galleryPostLikeService;
 
     @PostMapping
     public ResponseEntity<Long> createGalleryPost(@PathVariable Long crewId, @RequestPart("content") GalleryPostCreateRequestDto contentDto, @RequestPart("images") List<MultipartFile> images) {
@@ -30,4 +33,16 @@ public ResponseEntity<GalleryPostDetailResponseDto> getGalleryPost(@PathVariable
         GalleryPostDetailResponseDto responseDto = galleryPostQueryService.getGalleryPostDetail(crewId, postId);
         return ResponseEntity.ok(responseDto);
     }
+
+    @GetMapping
+    public ResponseEntity<GalleryPreviewResponseDto> getGalleryPreview(@PathVariable Long crewId) {
+        GalleryPreviewResponseDto responseDto = galleryPostQueryService.getGalleryPreview(crewId);
+        return ResponseEntity.ok(responseDto);
+    }
+
+    @PostMapping("/{crewPostId}/like")
+    public ResponseEntity<Void> likeGalleryPost(@PathVariable Long crewId, @PathVariable Long crewPostId) {
+        galleryPostLikeService.likeGalleryPost(crewId, crewPostId);
+        return ResponseEntity.ok().build();
+    }
 }

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

@@ -0,0 +1,17 @@
+package RunningMachines.R2R.domain.crew.post.gallery.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+import java.util.List;
+
+@Getter
+@Builder
+@AllArgsConstructor
+public class GalleryPreviewResponseDto {
+    private String crewTitle;
+    private int postCount;
+    private int memberCount;
+    private List<GallerySimpleResponseDto> posts;
+}

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

@@ -0,0 +1,14 @@
+package RunningMachines.R2R.domain.crew.post.gallery.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@Builder
+@AllArgsConstructor
+public class GallerySimpleResponseDto {
+    private Long postId;
+    private String imageUrl;
+}

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

@@ -0,0 +1,51 @@
+package RunningMachines.R2R.domain.crew.post.gallery.service;
+
+import RunningMachines.R2R.domain.community.post.entity.Post;
+import RunningMachines.R2R.domain.community.post.repository.PostRepository;
+import RunningMachines.R2R.domain.crew.common.repository.CrewRepository;
+import RunningMachines.R2R.domain.crew.post.entity.CrewPost;
+import RunningMachines.R2R.domain.crew.post.entity.CrewPostLike;
+import RunningMachines.R2R.domain.crew.post.repository.CrewPostLikeRepository;
+import RunningMachines.R2R.domain.crew.post.repository.CrewPostRepository;
+import RunningMachines.R2R.domain.user.service.AuthCommandService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import RunningMachines.R2R.domain.user.entity.User;
+import RunningMachines.R2R.domain.crew.common.entity.Crew;
+
+@Service
+@RequiredArgsConstructor
+public class GalleryPostLikeService {
+    private final CrewPostRepository crewPostRepository;
+    private final CrewPostLikeRepository crewPostLikeRepository;
+    private final CrewRepository crewRepository;
+    private final AuthCommandService authCommandService;
+
+    @Transactional
+    public void likeGalleryPost(Long crewId, Long crewPostId) {
+        User currentUser = authCommandService.getCurrentUser();
+
+        CrewPost crewPost = crewPostRepository.findById(crewPostId)
+                .orElseThrow(() -> new IllegalArgumentException("게시글을 찾을 수 없습니다."));
+        Crew crew = crewRepository.findById(crewId)
+                .orElseThrow(() -> new IllegalArgumentException("크루를 찾을 수 없습니다."));
+
+        boolean isMemberOrLeader = crew.getCrewUsers().stream()
+                .anyMatch(crewUser -> crewUser.getUser().equals(currentUser));
+        if (!isMemberOrLeader) {
+            throw new IllegalArgumentException("좋아요는 크루 멤버만 누를 수 있습니다.");
+        }
+
+        boolean alreadyLiked = crewPostLikeRepository.existsByCrewPostAndUser(crewPost, currentUser);
+        if (alreadyLiked) {
+            throw new IllegalArgumentException("이미 좋아요를 눌렀습니다.");
+        }
+
+        CrewPostLike like = CrewPostLike.builder()
+                .crewPost(crewPost)
+                .user(currentUser)
+                .build();
+        crewPostLikeRepository.save(like);
+    }
+}

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

@@ -1,19 +1,26 @@
 package RunningMachines.R2R.domain.crew.post.gallery.service;
 
 import RunningMachines.R2R.domain.crew.board.entity.CrewBoard;
+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.gallery.dto.GalleryPostDetailResponseDto;
+import RunningMachines.R2R.domain.crew.post.gallery.dto.GalleryPreviewResponseDto;
+import RunningMachines.R2R.domain.crew.post.gallery.dto.GallerySimpleResponseDto;
 import RunningMachines.R2R.domain.crew.post.repository.CrewPostRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.ArrayList;
 import java.util.stream.Collectors;
+import java.util.List;
 
 @Service
 @RequiredArgsConstructor
 public class GalleryPostQueryService {
     private final CrewPostRepository crewPostRepository;
+    private final CrewRepository crewRepository;
 
     @Transactional(readOnly = true)
     public GalleryPostDetailResponseDto getGalleryPostDetail(Long crewId, Long crewPostId) {
@@ -40,4 +47,28 @@ public GalleryPostDetailResponseDto getGalleryPostDetail(Long crewId, Long crewP
                 .content(crewPost.getContent())
                 .build();
     }
+
+    @Transactional(readOnly = true)
+    public GalleryPreviewResponseDto getGalleryPreview(Long crewId) {
+        Crew crew = crewRepository.findById(crewId)
+                .orElseThrow(() -> new IllegalArgumentException("해당 크루를 찾을 수 없습니다."));
+
+        int postCount = crewPostRepository.countByCrewId(crewId);
+        int memberCount = crew.getCrewUsers().size();
+
+        List<GallerySimpleResponseDto> posts = crewPostRepository.findAllByCrewIdAndBoard(crewId, CrewBoard.GALLERY).stream()
+                .filter(post -> !post.getImages().isEmpty())
+                .map(post -> GallerySimpleResponseDto.builder()
+                        .postId(post.getId())
+                        .imageUrl(post.getImages().get(0).getImageUrl())
+                        .build())
+                .collect(Collectors.toList());
+
+        return GalleryPreviewResponseDto.builder()
+                .crewTitle(crew.getTitle())
+                .postCount(postCount)
+                .memberCount(memberCount)
+                .posts(posts)
+                .build();
+    }
 }

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/repository/CrewPostLikeRepository.java

@@ -0,0 +1,14 @@
+package RunningMachines.R2R.domain.crew.post.repository;
+
+import RunningMachines.R2R.domain.crew.post.entity.CrewPost;
+import RunningMachines.R2R.domain.user.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+import RunningMachines.R2R.domain.crew.post.entity.CrewPostLike;
+
+import java.util.Optional;
+
+public interface CrewPostLikeRepository extends JpaRepository<CrewPostLike, Integer> {
+    boolean existsByCrewPostAndUser(CrewPost crewPost, User user);
+
+    Optional<CrewPostLike> findByCrewPostAndUser(CrewPost crewPost, User user);
+}

src/backend/src/main/java/RunningMachines/R2R/domain/crew/post/repository/CrewPostRepository.java

@@ -8,7 +8,8 @@
 import java.util.Optional;
 
 public interface CrewPostRepository extends JpaRepository<CrewPost, Long> {
-    List<CrewPost> findAllByUserIdAndBoard(Long userId, CrewBoard board);
+    int countByCrewId(Long crewId);
+
     List<CrewPost> findAllByCrewIdAndBoard(Long crewId, CrewBoard board);
 
     Optional<CrewPost> findByIdAndCrewIdAndBoard(Long id, Long crewId, CrewBoard board);