dev add check for change status

src/main/java/ru/soune/nocopy/service/complaint/ComplaintEntityService.java

@@ -85,12 +85,22 @@ public class ComplaintEntityService {
         if (!violationRepository.existsById(violationId)) {
             throw new ViolationNotFoundException("Violation not found: " + violationId);
         }
+
         return complaintRepository.findByViolationId(violationId)
                 .stream()
                 .map(this::mapToResponse)
                 .collect(Collectors.toList());
     }
 
+    public List<ComplaintEntity> fetchComplaintByViolation(Long violationId) {
+        if (!violationRepository.existsById(violationId)) {
+            return null;
+        }
+
+        return complaintRepository.findByViolationIdAndStatuses(violationId, List.of(ComplaintStatus.CREATED.name(),
+                ComplaintStatus.SHOWED.name(), ComplaintStatus.IN_WORK.name()));
+    }
+
     public ComplaintResponse updateComplaintStatus(Long id, ComplaintStatus status) {
         ComplaintEntity complaint = complaintRepository.findById(id)
                 .orElseThrow(() -> new ComplaintNotFoundException("Complaint not found: " + id));

src/main/java/ru/soune/nocopy/service/complaint/LawCaseService.java

@@ -13,7 +13,7 @@ import ru.soune.nocopy.entity.user.User;
 import ru.soune.nocopy.repository.LawCaseRepository;
 
 import java.math.BigDecimal;
-import java.util.List;
+import java.util.Optional;
 
 @Service
 @RequiredArgsConstructor
@@ -70,6 +70,13 @@ public class LawCaseService {
         return lawCaseRepository.save(lawCase);
     }
 
+    public LawCase fetchByViolationId(Long violationId) {
+        Optional<LawCase> lawCaseByViolationIdAndType =
+                lawCaseRepository.getLawCaseByViolationIdAndType(violationId, LawCaseType.ACTIVE.getName());
+
+        return lawCaseByViolationIdAndType.orElse(null);
+    }
+
     public Page<LawCase> getAllUserLawCases(Long userId, int pageSize, int pageNumber,
                                             LawCaseType lawCaseType, String lawyer,
                                             LawCasePriority lawCasePriority,

src/main/java/ru/soune/nocopy/service/violation/ViolationService.java

@@ -11,11 +11,14 @@ import org.springframework.transaction.annotation.Transactional;
 import ru.soune.nocopy.dto.file.YandexSearchResponse;
 import ru.soune.nocopy.dto.violation.FileViolationSummaryDTO;
 import ru.soune.nocopy.dto.violation.ViolationStatisticsResponse;
+import ru.soune.nocopy.entity.complaint.ComplaintEntity;
 import ru.soune.nocopy.entity.file.FileEntity;
 import ru.soune.nocopy.entity.search.GlobalSearchResult;
 import ru.soune.nocopy.entity.violation.Violation;
 import ru.soune.nocopy.repository.FileEntityRepository;
 import ru.soune.nocopy.repository.ViolationRepository;
+import ru.soune.nocopy.service.complaint.ComplaintEntityService;
+import ru.soune.nocopy.service.complaint.LawCaseService;
 import ru.soune.nocopy.service.file.FileEntityService;
 
 import java.time.LocalDateTime;
@@ -32,6 +35,10 @@ public class ViolationService {
 
     private final FileEntityService fileEntityService;
 
+    private final ComplaintEntityService complaintEntityService;
+
+    private final LawCaseService lawCaseService;
+
     public void processViolation(YandexSearchResponse.ImageResult imageResult, FileEntity file,
                                  GlobalSearchResult result) {
         String url = imageResult.getUrl();
@@ -170,6 +177,12 @@ public class ViolationService {
                         LinkedHashMap::new));
     }
 
+    public boolean validateChangeStatus(Long violationId) {
+        List<ComplaintEntity> complaintEntities = complaintEntityService.fetchComplaintByViolation(violationId);
+
+        return complaintEntities == null && lawCaseService.fetchByViolationId(violationId) == null;
+    }
+
     public ViolationStatisticsResponse getViolationStatistics(Long userId, String fileId,
                                                               LocalDateTime startDate, LocalDateTime endDate) {