[add] 기수 수상내역이 있을때 다시 추가시 에러처리 (#134)

* [add] 기수 수상내역이 있을때 다시 추가시 에러처리 (#130)

* [chore] spotless 적용

* [docs] 주석 추가

src/main/java/ceos/backend/domain/awards/exception/AwardsErrorCode.java

@@ -1,6 +1,7 @@
 package ceos.backend.domain.awards.exception;
 
 import static org.springframework.http.HttpStatus.BAD_REQUEST;
+import static org.springframework.http.HttpStatus.CONFLICT;
 
 import ceos.backend.global.common.dto.ErrorReason;
 import ceos.backend.global.error.BaseErrorCode;
@@ -12,7 +13,8 @@
 @AllArgsConstructor
 public enum AwardsErrorCode implements BaseErrorCode {
     AWARD_NOT_FOUND(BAD_REQUEST, "AWARD_404_1", "해당 수상이력이 존재하지 않습니다"),
-    START_DATE_NOT_FOUND(BAD_REQUEST, "AWARD_404_2", "해당 기수의 활동 시작 시기 정보가 존재하지 않습니다");
+    START_DATE_NOT_FOUND(BAD_REQUEST, "AWARD_404_2", "해당 기수의 활동 시작 시기 정보가 존재하지 않습니다"),
+    DUPLICATE_GENERATION(CONFLICT, "AWARD_409_1", "해당 기수의 데이터가 이미 존재합니다");
 
     private HttpStatus status;
     private String code;

src/main/java/ceos/backend/domain/awards/exception/DuplicateGeneration.java

@@ -0,0 +1,12 @@
+package ceos.backend.domain.awards.exception;
+
+
+import ceos.backend.global.error.BaseErrorException;
+
+public class DuplicateGeneration extends BaseErrorException {
+    public static final DuplicateGeneration EXCEPTION = new DuplicateGeneration();
+
+    private DuplicateGeneration() {
+        super(AwardsErrorCode.DUPLICATE_GENERATION);
+    }
+}

src/main/java/ceos/backend/domain/awards/helper/AwardsHelper.java

@@ -2,13 +2,17 @@
 
 
 import ceos.backend.domain.awards.domain.Awards;
+import ceos.backend.domain.awards.domain.StartDate;
 import ceos.backend.domain.awards.dto.response.AwardsResponse;
+import ceos.backend.domain.awards.exception.DuplicateGeneration;
 import ceos.backend.domain.awards.repository.AwardsRepository;
+import ceos.backend.domain.awards.repository.StartDateRepository;
 import ceos.backend.domain.awards.vo.ProjectInfoVo;
 import ceos.backend.domain.project.domain.Project;
 import ceos.backend.domain.project.repository.ProjectRepository;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
 
@@ -18,6 +22,7 @@ public class AwardsHelper {
 
     private final ProjectRepository projectRepository;
     private final AwardsRepository awardsRepository;
+    private final StartDateRepository startDateRepository;
 
     public List<ProjectInfoVo> getProjectVo(int generation) {
         List<Project> projectList = projectRepository.findByGeneration(generation);
@@ -39,4 +44,11 @@ public List<AwardsResponse> getAwardsDto(int generation) {
         }
         return awardsResponseList;
     }
+
+    public void validateGeneration(int generation) {
+        Optional<StartDate> startDate = startDateRepository.findById(generation);
+        if (startDate.isPresent()) {
+            throw DuplicateGeneration.EXCEPTION;
+        }
+    }
 }

src/main/java/ceos/backend/domain/awards/service/AwardsService.java

@@ -32,6 +32,9 @@ public class AwardsService {
 
     @Transactional
     public void createAwards(AwardsRequest awardsRequest) {
+        // 이미 기수의 수상 정보가 있다면 다시 추가할 수 없음
+        awardsHelper.validateGeneration(awardsRequest.getGeneration());
+
         // 활동 시작 시기 저장
         StartDate startDate = StartDate.from(awardsRequest);
         startDateRepository.save(startDate);