refactor: 서비스 계층 리팩토링 (DASOMBE-15)

Author: jucheonsu

src/main/java/dmu/dasom/api/domain/activity/service/ActivityService.java

@@ -0,0 +1,13 @@
+package dmu.dasom.api.domain.activity.service;
+
+import dmu.dasom.api.domain.activity.dto.ActivityRequestDto;
+import dmu.dasom.api.domain.activity.dto.ActivityResponseDto;
+
+import java.util.List;
+
+public interface ActivityService {
+    List<ActivityResponseDto> getActivities();
+    void createActivity(ActivityRequestDto requestDto);
+    void updateActivity(Long activityId, ActivityRequestDto requestDto);
+    void deleteActivity(Long activityId);
+}

src/main/java/dmu/dasom/api/domain/activity/service/ActivityServiceImpl.java

@@ -0,0 +1,73 @@
+package dmu.dasom.api.domain.activity.service;
+
+import dmu.dasom.api.domain.activity.dto.ActivityRequestDto;
+import dmu.dasom.api.domain.activity.dto.ActivityResponseDto;
+import dmu.dasom.api.domain.activity.entity.Activity;
+import dmu.dasom.api.domain.activity.entity.Section;
+import dmu.dasom.api.domain.activity.repository.ActivityRepository;
+import dmu.dasom.api.domain.activity.repository.SectionRepository;
+import dmu.dasom.api.domain.common.exception.CustomException;
+import dmu.dasom.api.domain.common.exception.ErrorCode;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class ActivityServiceImpl implements ActivityService {
+
+    private final ActivityRepository activityRepository;
+    private final SectionRepository sectionRepository;
+
+    @Override
+    @Transactional(readOnly = true)
+    public List<ActivityResponseDto> getActivities() {
+        return ActivityResponseDto.of(activityRepository.findAll());
+    }
+
+    @Override
+    public void createActivity(ActivityRequestDto requestDto) {
+        // DTO에서 받은 String(섹션 이름)으로 Section 엔티티를 찾거나 생성
+        Section section = findOrCreateSection(requestDto.getSection());
+
+        activityRepository.save(Activity.create(
+                section,
+                requestDto.getActivityDate(),
+                requestDto.getTitle(),
+                requestDto.getAward()
+        ));
+    }
+
+    @Override
+    public void updateActivity(Long activityId, ActivityRequestDto requestDto) {
+        Activity activity = activityRepository.findById(activityId)
+                .orElseThrow(() -> new CustomException(ErrorCode.NOT_FOUND));
+
+        // DTO에서 받은 String(섹션 이름)으로 Section 엔티티를 찾거나 생성
+        Section section = findOrCreateSection(requestDto.getSection());
+
+        activity.update(
+                section,
+                requestDto.getActivityDate(),
+                requestDto.getTitle(),
+                requestDto.getAward()
+        );
+    }
+
+    @Override
+    public void deleteActivity(Long activityId) {
+        if (!activityRepository.existsById(activityId)) {
+            throw new CustomException(ErrorCode.NOT_FOUND);
+        }
+        activityRepository.deleteById(activityId);
+    }
+
+    // 파라미터 타입을 Section에서 String으로 변경
+    private Section findOrCreateSection(String sectionName) {
+        return sectionRepository.findByName(sectionName)
+                .orElseGet(() -> sectionRepository.save(Section.create(sectionName)));
+    }
+}