feat: 페이지 메타데이터 응답 추가 (#33)

Author: kih1015

src/main/java/kr/kro/photoliner/domain/photo/controller/PhotoController.java

@@ -12,6 +12,9 @@
 import kr.kro.photoliner.domain.photo.service.PhotoService;
 import kr.kro.photoliner.domain.photo.service.PhotoUploadService;
 import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.web.PageableDefault;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
@@ -37,9 +40,10 @@ public class PhotoController {
 
     @GetMapping
     public ResponseEntity<PhotosResponse> getPhotoList(
-            @RequestParam Long userId
+            @RequestParam Long userId,
+            @PageableDefault(sort = "createdAt", direction = Sort.Direction.DESC) Pageable pageable
     ) {
-        return ResponseEntity.ok(photoService.getPhotoList(userId));
+        return ResponseEntity.ok(photoService.getPhotoList(userId, pageable));
     }
 
     @GetMapping("/markers")

src/main/java/kr/kro/photoliner/domain/photo/dto/response/PhotosResponse.java

@@ -4,23 +4,44 @@
 import java.util.List;
 import java.util.Optional;
 import kr.kro.photoliner.domain.photo.model.Photo;
-import kr.kro.photoliner.domain.photo.model.Photos;
 import org.locationtech.jts.geom.Point;
+import org.springframework.data.domain.Page;
 
 public record PhotosResponse(
-        Integer count,
-        List<InnerPhotoResponse> photos
+        List<InnerPhotoResponse> photos,
+        InnerPageInfo pageInfo
 ) {
 
-    public static PhotosResponse from(Photos photos) {
+    public static PhotosResponse from(Page<Photo> photoPage) {
         return new PhotosResponse(
-                photos.count(),
-                photos.photos().stream()
+                photoPage.getContent().stream()
                         .map(InnerPhotoResponse::from)
-                        .toList()
+                        .toList(),
+                InnerPageInfo.from(photoPage)
         );
     }
 
+    public record InnerPageInfo(
+            long totalElements,
+            int totalPages,
+            int currentPage,
+            int size,
+            boolean hasNext,
+            boolean hasPrevious
+    ) {
+
+        public static InnerPageInfo from(Page<Photo> page) {
+            return new InnerPageInfo(
+                    page.getTotalElements(),
+                    page.getTotalPages(),
+                    page.getNumber(),
+                    page.getSize(),
+                    page.hasNext(),
+                    page.hasPrevious()
+            );
+        }
+    }
+
     public record InnerPhotoResponse(
             Long id,
             String filePath,

src/main/java/kr/kro/photoliner/domain/photo/repository/PhotoRepository.java

@@ -4,21 +4,18 @@
 import kr.kro.photoliner.domain.photo.model.Photo;
 import kr.kro.photoliner.domain.photo.model.Photos;
 import org.locationtech.jts.geom.Point;
+import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 
 public interface PhotoRepository extends JpaRepository<Photo, Long> {
 
-    List<Photo> findByUserId(
+    Page<Photo> findByUserId(
             Long userId,
             Pageable pageable
     );
 
-    default Photos findPhotosByUserId(Long userId, Pageable pageable) {
-        return new Photos(findByUserId(userId, pageable));
-    }
-
     @Query("""
             select p
             from Photo p

src/main/java/kr/kro/photoliner/domain/photo/service/PhotoService.java

@@ -13,9 +13,7 @@
 import org.locationtech.jts.geom.Coordinate;
 import org.locationtech.jts.geom.GeometryFactory;
 import org.locationtech.jts.geom.Point;
-import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
-import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -27,10 +25,8 @@ public class PhotoService {
     private final GeometryFactory geometryFactory;
 
     @Transactional(readOnly = true)
-    public PhotosResponse getPhotoList(Long userId) {
-        Pageable pageable = PageRequest.of(0, 10, Sort.by("createdAt").descending());
-        Photos photos = photoRepository.findPhotosByUserId(userId, pageable);
-        return PhotosResponse.from(photos);
+    public PhotosResponse getPhotoList(Long userId, Pageable pageable) {
+        return PhotosResponse.from(photoRepository.findByUserId(userId, pageable));
     }
 
     @Transactional(readOnly = true)