[FEATURE] 어드민 디자이너 포트폴리오 조회 기능 구현

src/main/java/ditda/backend/domain/admin/designer/controller/AdminDesignerController.java

@@ -7,6 +7,7 @@
 import org.springframework.web.bind.annotation.RestController;
 
 import ditda.backend.domain.admin.designer.dto.response.DesignerAccountResponse;
+import ditda.backend.domain.admin.designer.dto.response.DesignerPortfolioResponse;
 import ditda.backend.domain.admin.designer.service.AdminDesignerService;
 import ditda.backend.global.apipayload.response.ApiResponse;
 import io.swagger.v3.oas.annotations.Operation;
@@ -32,4 +33,16 @@ public ApiResponse<DesignerAccountResponse> getDesignerAccount(
 
 		return ApiResponse.onSuccess("디자이너 계좌 정보 조회 성공", response);
 	}
+
+	@Operation(summary = "디자이너 포트폴리오 조회", description = "**[어드민]** 디자이너가 가입 시 첨부한 포트폴리오의 presigned URL을 조회합니다.")
+	@GetMapping("/{designerId}/portfolios")
+	public ApiResponse<DesignerPortfolioResponse> getDesignerPortfolios(
+		@AuthenticationPrincipal Long adminId,
+		@PathVariable Long designerId
+	) {
+
+		DesignerPortfolioResponse response = adminDesignerService.getDesignerPortfolios(adminId, designerId);
+
+		return ApiResponse.onSuccess("디자이너 포트폴리오 조회 성공", response);
+	}
 }

src/main/java/ditda/backend/domain/admin/designer/dto/response/DesignerPortfolioResponse.java

@@ -0,0 +1,21 @@
+package ditda.backend.domain.admin.designer.dto.response;
+
+import java.util.List;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+@Schema(description = "디자이너 포트폴리오 정보 응답")
+public record DesignerPortfolioResponse(
+
+	@Schema(description = "디자이너 ID", example = "1")
+	Long designerId,
+
+	@Schema(description = "포트폴리오 URL", example = "[\"https://example.com/portfolio/file.pdf\"]")
+	List<String> portfolioUrls
+
+) {
+
+	public static DesignerPortfolioResponse of(Long designerId, List<String> portfolioUrls) {
+		return new DesignerPortfolioResponse(designerId, portfolioUrls);
+	}
+}

src/main/java/ditda/backend/domain/admin/designer/mapper/AdminDesignerMapper.java

@@ -0,0 +1,25 @@
+package ditda.backend.domain.admin.designer.mapper;
+
+import java.util.List;
+
+import org.springframework.stereotype.Component;
+
+import ditda.backend.domain.admin.designer.dto.response.DesignerPortfolioResponse;
+import ditda.backend.global.s3.manager.S3PresignedUrlGenerator;
+import lombok.RequiredArgsConstructor;
+
+@Component
+@RequiredArgsConstructor
+public class AdminDesignerMapper {
+
+	private final S3PresignedUrlGenerator s3PresignedUrlGenerator;
+
+	public DesignerPortfolioResponse toPortfolioResponse(Long designerId, List<String> portfolioKeys) {
+
+		List<String> portfolioUrls = portfolioKeys.stream()
+			.map(s3PresignedUrlGenerator::generatePrivateGetUrl)
+			.toList();
+
+		return DesignerPortfolioResponse.of(designerId, portfolioUrls);
+	}
+}

src/main/java/ditda/backend/domain/admin/designer/service/AdminDesignerService.java

@@ -1,11 +1,16 @@
 package ditda.backend.domain.admin.designer.service;
 
+import java.util.List;
+
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import ditda.backend.domain.admin.designer.dto.response.DesignerAccountResponse;
+import ditda.backend.domain.admin.designer.dto.response.DesignerPortfolioResponse;
+import ditda.backend.domain.admin.designer.mapper.AdminDesignerMapper;
 import ditda.backend.domain.designer.entity.Designer;
 import ditda.backend.domain.designer.service.DesignerService;
+import ditda.backend.domain.designer.service.PortfolioService;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 
@@ -16,6 +21,8 @@
 public class AdminDesignerService {
 
 	private final DesignerService designerService;
+	private final PortfolioService portfolioService;
+	private final AdminDesignerMapper adminDesignerMapper;
 
 	// 디자이너 계좌 정보 조회
 	public DesignerAccountResponse getDesignerAccount(Long adminId, Long designerId) {
@@ -27,4 +34,19 @@ public DesignerAccountResponse getDesignerAccount(Long adminId, Long designerId)
 
 		return DesignerAccountResponse.from(designer);
 	}
+
+	// 디자이너 포트폴리오 조회
+	public DesignerPortfolioResponse getDesignerPortfolios(Long adminId, Long designerId) {
+
+		// 디자이너 존재 검증
+		designerService.validateExists(designerId);
+
+		// 포트폴리오 key 조회
+		List<String> portfolioKeys = portfolioService.getPortfolioKeys(designerId);
+
+		log.info("[Admin Audit] adminId={} accessed designerId={} portfolios (count={})",
+			adminId, designerId, portfolioKeys.size());
+
+		return adminDesignerMapper.toPortfolioResponse(designerId, portfolioKeys);
+	}
 }

src/main/java/ditda/backend/domain/designer/repository/PortfolioRepository.java

@@ -1,8 +1,12 @@
 package ditda.backend.domain.designer.repository;
 
+import java.util.List;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import ditda.backend.domain.designer.entity.Portfolio;
 
 public interface PortfolioRepository extends JpaRepository<Portfolio, Long> {
+
+	List<Portfolio> findByDesignerIdOrderByIdAsc(Long designerId);
 }

src/main/java/ditda/backend/domain/designer/service/DesignerService.java

@@ -30,4 +30,10 @@ public Designer getByIdWithUser(Long designerId) {
 	public Designer getReferenceById(Long designerId) {
 		return designerRepository.getReferenceById(designerId);
 	}
+
+	public void validateExists(Long designerId) {
+		if (!designerRepository.existsById(designerId)) {
+			throw new GeneralException(DesignerErrorCode.DESIGNER_NOT_FOUND);
+		}
+	}
 }

src/main/java/ditda/backend/domain/designer/service/PortfolioService.java

@@ -57,6 +57,13 @@ public void savePortfolios(Designer designer, List<String> portfolioKeys) {
 		portfolioRepository.saveAll(portfolios);
 	}
 
+	@Transactional(readOnly = true)
+	public List<String> getPortfolioKeys(Long designerId) {
+		return portfolioRepository.findByDesignerIdOrderByIdAsc(designerId).stream()
+			.map(Portfolio::getPortfolioUrl)
+			.toList();
+	}
+
 	public List<String> promote(List<String> tempKeys) {
 		return s3UploadManager.promote(BUCKET, tempKeys);
 	}