❇️ feat: NotificationQueryService 생성

NotificationQueryService 생성

src/main/java/foregg/foreggserver/service/notificationService/NotificationQueryService.java

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+package foregg.foreggserver.service.notificationService;
+
+import foregg.foreggserver.converter.NotificationConverter;
+import foregg.foreggserver.domain.Notification;
+import foregg.foreggserver.domain.Reply;
+import foregg.foreggserver.domain.User;
+import foregg.foreggserver.dto.notificationDTO.NotificationResponseDTO;
+import foregg.foreggserver.jwt.SecurityUtil;
+import foregg.foreggserver.repository.NotificationRepository;
+import foregg.foreggserver.repository.ReplyRepository;
+import foregg.foreggserver.service.userService.UserQueryService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class NotificationQueryService {
+
+    private final ReplyRepository replyRepository;
+    private final UserQueryService userQueryService;
+    private final NotificationRepository notificationRepository;
+
+    public List<NotificationResponseDTO> getNotificationHistory() {
+
+        List<NotificationResponseDTO> result = new ArrayList<>();
+
+        LocalDateTime thresholdDate = LocalDateTime.now().minusDays(30);
+        User user = userQueryService.getUser(SecurityUtil.getCurrentUser());
+
+        // 필터링된 Reply 리스트
+        List<Reply> replyList = replyRepository.findByReceiver(user).stream()
+                .filter(reply -> reply.getCreatedAt().isAfter(thresholdDate))
+                .toList();
+
+        // 필터링된 Notification 리스트
+        List<Notification> notificationList = notificationRepository.findByReceiver(user).stream()
+                .filter(notification -> notification.getCreatedAt().isAfter(thresholdDate))
+                .toList();
+
+        // 결과 생성
+        result.addAll(NotificationConverter.fromReplyToNotification(replyList));
+        result.addAll(NotificationConverter.toNotificationResponse(notificationList));
+
+        // createdAt 순서로 정렬
+        result.sort(Comparator.comparing(NotificationResponseDTO::getCreatedAt).reversed());
+
+        return result;
+    }
+
+}