NCBACK-25 add protection for audio and use hash method from library

src/main/java/ru/soune/nocopy/configuration/ApplicationConfig.java

@@ -1,6 +1,11 @@
 package ru.soune.nocopy.configuration;
 
+import com.vrt.AudioFilePathProvider;
 import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.audio.AudioLocalSearch;
+import com.vrt.fileprotection.image.ImageLocalSearch;
+import com.vrt.fileprotection.image.ImageUniqueCheck;
+import com.vrt.fileprotection.image.phash.PerceptualHashHelper;
 import lombok.AllArgsConstructor;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.context.annotation.Bean;
@@ -21,14 +26,23 @@ public class ApplicationConfig {
     }
 
     @Bean
-    public com.vrt.NoCopyFileService noCopyFileService(
+    public com.vrt.
+            NoCopyFileService noCopyFileService(
             FileProtector.FileProvider fileProvider,
-            FileProtector.ProcessingListener processingListener) {
+            FileProtector.ProcessingListener processingListener,
+            ImageUniqueCheck imageUniqueCheck,
+            ImageLocalSearch imageLocalSearch,
+            AudioLocalSearch audioLocalSearch,
+            AudioFilePathProvider audioFilePathProvider) {
 
         return new com.vrt.NoCopyFileService(
                 Collections.emptyList(),
                 fileProvider,
-                processingListener
+                processingListener,
+                imageUniqueCheck,
+                imageLocalSearch,
+                audioLocalSearch,
+                audioFilePathProvider
         );
     }
 }

src/main/java/ru/soune/nocopy/controller/ApiController.java

@@ -26,20 +26,17 @@ import ru.soune.nocopy.dto.file.ChunkUploadResponse;
 import ru.soune.nocopy.dto.file.CompleteUploadResponse;
 import ru.soune.nocopy.dto.file.FileEntityResponse;
 import ru.soune.nocopy.dto.file.UploadProgress;
-import ru.soune.nocopy.entity.AuthToken;
-import ru.soune.nocopy.entity.file.FileEntity;
 import ru.soune.nocopy.entity.file.FileStatus;
 import ru.soune.nocopy.entity.file.ProtectionStatus;
 import ru.soune.nocopy.entity.file.UploadStatus;
 import ru.soune.nocopy.exception.*;
 import ru.soune.nocopy.handler.*;
-import ru.soune.nocopy.repository.AuthTokenRepository;
-import ru.soune.nocopy.repository.FileEntityRepository;
 import ru.soune.nocopy.repository.FileEntityRepository;
 import ru.soune.nocopy.service.FileSimilarityService;
 import ru.soune.nocopy.service.auth.AuthService;
 import ru.soune.nocopy.service.file.FileEntityService;
 import ru.soune.nocopy.service.file.FileUploadService;
+import ru.soune.nocopy.util.FileUtil;
 
 import java.io.IOException;
 import java.nio.file.Files;
@@ -70,6 +67,8 @@ public class ApiController {
 
     private final NoCopyFileService noCopyFileService;
 
+    private final FileUtil fileUtil;
+
     @PostMapping("/v{version}/data")
     public ResponseEntity<?> handlePostRequest(@RequestBody BaseRequest request,
                                                @PathVariable("version") int version) {
@@ -147,7 +146,7 @@ public class ApiController {
         SimilarityFilter filter = SimilarityFilter.builder()
                 .similarityLevels(similarityLevels)
                 .build();
-        Page<SimilarFileResponse> similarFiles = fileSimilarityService.findSimilarFiles(fileId, filter, pageable);
+        Page<SimilarFileDTO> similarFiles = fileSimilarityService.findSimilarFiles(fileId, filter, pageable);
 
         String messageDesc;
         MessageCode success;
@@ -365,45 +364,22 @@ public class ApiController {
 
     @GetMapping("/protect/{fileId}")
     public ResponseEntity<?> protect( @PathVariable(required = false) String fileId) {
-        Optional<FileEntity> fileEntity = fileEntityRepository.findById(fileId);
+        Optional<FileEntity> optionalFileEntity = fileEntityRepository.findById(fileId);
 
-        if (!fileEntity.isPresent()) {
+        if (!optionalFileEntity.isPresent()) {
             return ResponseEntity.notFound().build();
         }
-
-        FileProtector.FileInfo fileInfo = createFileInfo(fileEntity.get());
+        FileEntity fileEntity = optionalFileEntity.get();
+        FileProtector.FileInfo fileInfo = fileUtil.createFileInfo(fileEntity);
 
         noCopyFileService.addFile(fileInfo);
 
-        fileEntity.get().setProtectionStatus(ProtectionStatus.PROCESSING);
-
-        fileEntityRepository.save(fileEntity.get());
+        fileEntity.setProtectionStatus(ProtectionStatus.PROCESSING);
+        fileEntityRepository.save(fileEntity);
 
         return ResponseEntity.ok().build();
     }
 
-    private FileProtector.FileInfo createFileInfo(FileEntity fileEntity) {
-        FileProtector.Type type = determineFileType(fileEntity.getMimeType());
-
-        return new FileProtector.FileInfo(type, fileEntity.getId(), String.valueOf(fileEntity.getUserId()));
-    }
-
-    private FileProtector.Type determineFileType(String mimeType) {
-        if (mimeType == null) {
-            return FileProtector.Type.IMAGE;
-        }
-
-        if (mimeType.startsWith("image")) {
-            return FileProtector.Type.IMAGE;
-        } else if (mimeType.startsWith("video")) {
-            return FileProtector.Type.VIDEO;
-        } else if (mimeType.startsWith("audio")) {
-            return FileProtector.Type.AUDIO;
-        } else {
-            return FileProtector.Type.IMAGE;
-        }
-    }
-
     private ResponseEntity<BaseResponse> checkForDuplicates(String uploadId) throws IOException {
         Optional<FileEntity> uploadedFile = fileEntityRepository.findByUploadSessionId(uploadId);
 
@@ -412,7 +388,7 @@ public class ApiController {
         }
 
         FileEntity fileEntity = uploadedFile.get();
-        List<SimilarFileResponse> similarFiles = fileSimilarityService.findSimilarFiles(fileEntity.getId());
+        List<SimilarFileDTO> similarFiles = fileSimilarityService.findSimilarFiles(fileEntity.getId());
 
         if (hasDuplicate(similarFiles)) {
             return handleDuplicate(fileEntity, similarFiles);
@@ -421,11 +397,11 @@ public class ApiController {
         return null;
     }
 
-    private boolean hasDuplicate(List<SimilarFileResponse> similarFiles) {
+    private boolean hasDuplicate(List<SimilarFileDTO> similarFiles) {
         return similarFiles.stream().anyMatch(f -> f.getHammingDistance() <= 5);
     }
 
-    private ResponseEntity<BaseResponse> handleDuplicate(FileEntity fileEntity, List<SimilarFileResponse> similarFiles)
+    private ResponseEntity<BaseResponse> handleDuplicate(FileEntity fileEntity, List<SimilarFileDTO> similarFiles)
             throws IOException {
         fileEntityService.deleteFromDisk(fileEntity);
 
@@ -511,23 +487,4 @@ public class ApiController {
         }
         return contentType;
     }
-
-    private Long getUserIdFromToken(String tokenHeader) {
-        String token = tokenHeader.replace("Bearer ", "");
-        AuthToken authToken = authTokenRepository.findByToken(token)
-                .orElseThrow(() -> new NotFoundAuthToken("Token not found"));
-        return authToken.getUser().getId();
-    }
-
-    private boolean isPreviewSupported(String mimeType) {
-        if (mimeType == null) {
-            return false;
-        }
-
-        return mimeType.startsWith("image") ||
-                mimeType.startsWith("text") ||
-                mimeType.equals("pdf") ||
-                mimeType.startsWith("video") ||
-                mimeType.startsWith("audio");
-    }
 }

src/main/java/ru/soune/nocopy/dto/file/SimilarFileDTO.java

@@ -5,10 +5,11 @@ import lombok.Value;
 
 @Value
 @Builder
-public class SimilarFileResponse {
+public class SimilarFileDTO {
     String fileId;
     String originalFileName;
     Long fileSize;
     Integer hammingDistance;
     String similarityLevel;
+    Long ownerId;
 }

src/main/java/ru/soune/nocopy/entity/file/FileEntity.java

@@ -76,6 +76,10 @@ public class FileEntity {
     @Column(name = "protected_at")
     private LocalDateTime protectedAt;
 
+    @Column(name = "signature")
+    @JsonIgnore
+    private String signature;
+
     @OneToOne(mappedBy = "file", cascade = CascadeType.ALL, orphanRemoval = true)
     @JsonIgnore
     private ImageHashEntity imageHash;

src/main/java/ru/soune/nocopy/repository/FileEntityRepository.java

@@ -13,8 +13,8 @@ import java.util.Optional;
 
 @Repository
 public interface FileEntityRepository extends JpaRepository<FileEntity, String> {
-
     List<FileEntity> findByUserId(Long userId);
+
     Optional<FileEntity> findByUserIdAndChecksum(Long userId,  String imageHash);
 
     List<FileEntity> findByUserIdAndStatus(Long userId, FileStatus status);
@@ -40,5 +40,11 @@ public interface FileEntityRepository extends JpaRepository<FileEntity, String>
     @Query("SELECT f FROM FileEntity f WHERE f.status = :status")
     List<FileEntity> searchFileEntityByStatus(@Param("status") FileStatus status);
 
+    @Query("SELECT f FROM FileEntity f WHERE f.id = :fileId")
+    FileEntity findByFileId(@Param("fileId") String fileId);
+
+    @Query("SELECT f FROM FileEntity f WHERE f.signature = :signature")
+    FileEntity findBySignature(@Param("signature") String signature);
+
     long countByUserId(Long userId);
 }

src/main/java/ru/soune/nocopy/repository/ImageHashRepository.java

@@ -4,7 +4,11 @@ import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 import ru.soune.nocopy.entity.file.ImageHashEntity;
 
+import java.util.List;
+
 @Repository
 public interface ImageHashRepository extends JpaRepository<ImageHashEntity, String> {
     void deleteByFileId(String fileId);
+    List<ImageHashEntity> findByFileId(String fileId);
+    ImageHashEntity findByHash64HiAndHash64Lo(Integer hash64Hi, Integer hash64Lo);
 }

src/main/java/ru/soune/nocopy/service/FileSimilarityService.java

@@ -5,12 +5,14 @@ import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
-import ru.soune.nocopy.dto.file.SimilarFileResponse;
+import ru.soune.nocopy.dto.file.SimilarFileDTO;
 import ru.soune.nocopy.dto.file.SimilarityFilter;
 import ru.soune.nocopy.repository.ImageHashRepository;
 import ru.soune.nocopy.repository.ImageSimilarityRepository;
 import ru.soune.nocopy.repository.SimilarImageProjection;
+import ru.soune.nocopy.util.FileUtil;
 
+import java.util.AbstractMap;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.List;
@@ -19,26 +21,28 @@ import java.util.stream.Collectors;
 @Service
 @RequiredArgsConstructor
 public class FileSimilarityService {
+
     private final ImageSimilarityRepository repository;
 
     private final ImageHashRepository hashRepository;
 
-    public List<SimilarFileResponse> findSimilarFiles(String fileId) {
+    private final FileUtil fileUtil;
+
+    public List<SimilarFileDTO> findSimilarFiles(String fileId) {
         var imageHashEntity = hashRepository.findById(fileId)
                 .orElseThrow(() -> new RuntimeException("Hash not found"));
 
         Integer hash64Hi = imageHashEntity.getHash64Hi();
         Integer hash64Lo = imageHashEntity.getHash64Lo();
 
-        List<SimilarImageProjection> candidates =
-                repository.findCandidates(fileId);
+        List<SimilarImageProjection> candidates = repository.findCandidates(fileId);
 
         return candidates.stream()
                 .map(c -> {
                     Integer cHi = c.getHash64Hi();
                     Integer cLo = c.getHash64Lo();
 
-                    int hamming = hamming64(hash64Hi, hash64Lo, cHi, cLo);
+                    int hamming = fileUtil.hamming64(hash64Hi, hash64Lo, cHi, cLo);
 
                     String level;
                     if (hamming <= 5) {
@@ -49,7 +53,7 @@ public class FileSimilarityService {
                         level = "DIFFERENT";
                     }
 
-                    return SimilarFileResponse.builder()
+                    return SimilarFileDTO.builder()
                             .fileId(c.getFileId())
                             .originalFileName(c.getOriginalFileName())
                             .fileSize(c.getFileSize())
@@ -62,6 +66,52 @@ public class FileSimilarityService {
                 .toList();
     }
 
+    public List<SimilarFileDTO> findDuplicateByHammingDistance(String fileId, int hammingDistance,
+                                                               int duplicate, int similar) {
+        List<SimilarImageProjection> candidates = repository.findCandidates(fileId);
+
+        var imageHashEntity = hashRepository.findById(fileId)
+                .orElseThrow(() -> new RuntimeException("Hash not found"));
+
+        Integer hash64Hi = imageHashEntity.getHash64Hi();
+        Integer hash64Lo = imageHashEntity.getHash64Lo();
+
+        return candidates.stream()
+                .map(c -> {
+                    Integer cHi = c.getHash64Hi();
+                    Integer cLo = c.getHash64Lo();
+
+                    int hamming = fileUtil.hamming64(hash64Hi, hash64Lo, cHi, cLo);
+
+                    return new AbstractMap.SimpleEntry<>(c, hamming);
+                })
+                .filter(entry -> entry.getValue() <= hammingDistance)
+                .sorted((a, b) -> Integer.compare(a.getValue(), b.getValue()))
+                .map(entry -> {
+                    SimilarImageProjection similarImageProjection = entry.getKey();
+                    int hamming = entry.getValue();
+
+                    String level;
+                    if (hamming <= duplicate) {
+                        level = "DUPLICATE";
+                    } else if (hamming <= similar) {
+                        level = "SIMILAR";
+                    } else {
+                        level = "DIFFERENT";
+                    }
+
+                    return SimilarFileDTO.builder()
+                            .fileId(similarImageProjection.getFileId())
+                            .originalFileName(similarImageProjection.getOriginalFileName())
+                            .fileSize(similarImageProjection.getFileSize())
+                            .hammingDistance(hamming)
+                            .similarityLevel(level)
+                            .ownerId(similarImageProjection.getUserId())
+                            .build();
+                })
+                .toList();
+    }
+
     public List<SimilarImageProjection> findDuplicatedByHash(Integer hash64Hi, Integer hash64Lo) {
         List<SimilarImageProjection> duplicates = repository.findExactDuplicates(hash64Hi,hash64Lo);
 
@@ -72,7 +122,7 @@ public class FileSimilarityService {
         return duplicates;
     }
 
-    public Page<SimilarFileResponse> findSimilarFiles(String fileId, SimilarityFilter filter, Pageable pageable) {
+    public Page<SimilarFileDTO> findSimilarFiles(String fileId, SimilarityFilter filter, Pageable pageable) {
         var imageHashEntity = hashRepository.findById(fileId)
                 .orElseThrow(() -> new RuntimeException("Hash not found"));
 
@@ -85,10 +135,10 @@ public class FileSimilarityService {
                 ? filter.getSimilarityLevels()
                 : List.of("DUPLICATE", "SIMILAR", "DIFFERENT");
 
-        List<SimilarFileResponse> allResults = candidates.stream()
+        List<SimilarFileDTO> allResults = candidates.stream()
                 .map(c -> createSimilarFileResponse(c, hash64Hi, hash64Lo))
                 .filter(response -> similarityLevels.contains(response.getSimilarityLevel()))
-                .sorted(Comparator.comparingInt(SimilarFileResponse::getHammingDistance))
+                .sorted(Comparator.comparingInt(SimilarFileDTO::getHammingDistance))
                 .collect(Collectors.toList());
 
         int total = allResults.size();
@@ -98,17 +148,17 @@ public class FileSimilarityService {
         int fromIndex = Math.min(page * size, total);
         int toIndex = Math.min(fromIndex + size, total);
 
-        List<SimilarFileResponse> pageContent = allResults.subList(fromIndex, toIndex);
+        List<SimilarFileDTO> pageContent = allResults.subList(fromIndex, toIndex);
 
         return new PageImpl<>(pageContent, pageable, total);
     }
 
-    private SimilarFileResponse createSimilarFileResponse(SimilarImageProjection similarImageProjection,
-                                                          Integer hash64Hi, Integer hash64Lo) {
+    private SimilarFileDTO createSimilarFileResponse(SimilarImageProjection similarImageProjection,
+                                                     Integer hash64Hi, Integer hash64Lo) {
         Integer imageProjectionHash64Hi = similarImageProjection.getHash64Hi();
         Integer similarImageProjectionHash64Lo = similarImageProjection.getHash64Lo();
 
-        int hamming = hamming64(hash64Hi, hash64Lo, imageProjectionHash64Hi, similarImageProjectionHash64Lo);
+        int hamming = fileUtil.hamming64(hash64Hi, hash64Lo, imageProjectionHash64Hi, similarImageProjectionHash64Lo);
 
         String level;
         if (hamming <= 5) {
@@ -119,7 +169,7 @@ public class FileSimilarityService {
             level = "DIFFERENT";
         }
 
-        return SimilarFileResponse.builder()
+        return SimilarFileDTO.builder()
                 .fileId(similarImageProjection.getFileId())
                 .originalFileName(similarImageProjection.getOriginalFileName())
                 .fileSize(similarImageProjection.getFileSize())
@@ -127,9 +177,4 @@ public class FileSimilarityService {
                 .similarityLevel(level)
                 .build();
     }
-
-    private int hamming64(int aHi, int aLo, int bHi, int bLo) {
-        return Integer.bitCount(aHi ^ bHi)
-                + Integer.bitCount(aLo ^ bLo);
-    }
 }

src/main/java/ru/soune/nocopy/service/ImageHashService.java

@@ -1,5 +1,7 @@
 package ru.soune.nocopy.service;
 
+import com.vrt.fileprotection.image.phash.PHash;
+import com.vrt.fileprotection.image.phash.PerceptualHashHelper;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
@@ -7,15 +9,10 @@ import ru.soune.nocopy.entity.file.FileEntity;
 import ru.soune.nocopy.entity.file.ImageHashEntity;
 import ru.soune.nocopy.repository.ImageHashRepository;
 
-import javax.imageio.ImageIO;
-import java.awt.*;
-import java.awt.image.BufferedImage;
+import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.time.LocalDateTime;
-import java.util.Arrays;
 import java.util.Map;
 
 @Service
@@ -26,11 +23,15 @@ public class ImageHashService {
     private final ImageHashRepository repository;
 
     public Map<String, Integer> calculateHash(Path imagePath) throws IOException {
-        long hash64 = computePhash64(imagePath);
+        File file = imagePath.toFile();
+        PHash pHash = PerceptualHashHelper.INSTANCE.generateDCTPerceptualHash(file);
+        Long firstPart = pHash.getFirstPart();
+        Long secondPart = pHash.getSecondPart();
+        Map<String, Integer> hash = Map.of(
+                "hi", Math.toIntExact(firstPart),
+                "low", Math.toIntExact(secondPart));
 
-        return Map.of(
-                "hi", high32(hash64),
-                "low", low32(hash64));
+        return hash;
     }
 
     public void create(FileEntity file,  Map<String, Integer> stringIntegerMap) {
@@ -44,111 +45,4 @@ public class ImageHashService {
 
         repository.save(entity);
     }
-
-    private long computePhash64(Path path) throws IOException {
-        try (InputStream is = Files.newInputStream(path)) {
-            BufferedImage image = ImageIO.read(is);
-            if (image == null) throw new IOException("Cannot read image file: " + path);
-
-            BufferedImage gray = toGrayScale(image);
-            BufferedImage resized = resizeImage(gray, 32, 32);
-
-            double[][] dct = applyDCT(resized);
-            double[][] topLeft = extractTopLeft8x8(dct);
-            double median = calculateMedian(topLeft, true);
-
-            return create64BitHashLong(topLeft, median);
-        }
-    }
-
-    private BufferedImage toGrayScale(BufferedImage image) {
-        BufferedImage gray = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
-        Graphics2D g = gray.createGraphics();
-        g.drawImage(image, 0, 0, null);
-        g.dispose();
-        return gray;
-    }
-
-    private BufferedImage resizeImage(BufferedImage image, int width, int height) {
-        BufferedImage resized = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
-        Graphics2D g = resized.createGraphics();
-        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
-        g.drawImage(image, 0, 0, width, height, null);
-        g.dispose();
-        return resized;
-    }
-
-    private double[][] applyDCT(BufferedImage image) {
-        int w = image.getWidth();
-        int h = image.getHeight();
-        double[][] pixels = new double[h][w];
-
-        for (int y = 0; y < h; y++) {
-            for (int x = 0; x < w; x++) {
-                int gray = image.getRGB(x, y) & 0xFF;
-                pixels[y][x] = gray;
-            }
-        }
-
-        double[][] dct = new double[h][w];
-        for (int u = 0; u < h; u++) {
-            double au = u == 0 ? 1.0 / Math.sqrt(h) : Math.sqrt(2.0 / h);
-            for (int v = 0; v < w; v++) {
-                double av = v == 0 ? 1.0 / Math.sqrt(w) : Math.sqrt(2.0 / w);
-                double sum = 0.0;
-                for (int x = 0; x < h; x++) {
-                    for (int y = 0; y < w; y++) {
-                        sum += pixels[x][y] *
-                                Math.cos((2 * x + 1) * u * Math.PI / (2.0 * h)) *
-                                Math.cos((2 * y + 1) * v * Math.PI / (2.0 * w));
-                    }
-                }
-                dct[u][v] = au * av * sum;
-            }
-        }
-        return dct;
-    }
-
-    private double[][] extractTopLeft8x8(double[][] dct) {
-        double[][] block = new double[8][8];
-        for (int i = 0; i < 8; i++) System.arraycopy(dct[i], 0, block[i], 0, 8);
-        return block;
-    }
-
-    private double calculateMedian(double[][] block, boolean excludeDC) {
-        double[] vals = new double[63];
-        int idx = 0;
-        for (int i = 0; i < 8; i++) {
-            for (int j = 0; j < 8; j++) {
-                if (i == 0 && j == 0 && excludeDC) continue;
-                vals[idx++] = block[i][j];
-            }
-        }
-        Arrays.sort(vals);
-        return (vals.length % 2 == 0) ?
-                (vals[vals.length / 2 - 1] + vals[vals.length / 2]) / 2.0 :
-                vals[vals.length / 2];
-    }
-
-    private long create64BitHashLong(double[][] block, double median) {
-        long hash = 0L;
-
-        for (int i = 0; i < 8; i++) {
-            for (int j = 0; j < 8; j++) {
-                if (i == 0 && j == 0) continue;
-                hash <<= 1;
-                if (block[i][j] > median) hash |= 1;
-            }
-        }
-
-        return hash;
-    }
-
-    private int high32(long hash64) {
-        return (int) (hash64 >>> 32);
-    }
-
-    private int low32(long hash64) {
-        return (int) hash64;
-    }
 }

src/main/java/ru/soune/nocopy/service/file/FileEntityService.java

@@ -9,6 +9,7 @@ import ru.soune.nocopy.dto.file.FileResponse;
 import ru.soune.nocopy.entity.file.FileEntity;
 import ru.soune.nocopy.entity.file.FileStatus;
 import ru.soune.nocopy.entity.file.FileUploadSession;
+import ru.soune.nocopy.entity.file.ProtectionStatus;
 import ru.soune.nocopy.exception.DuplicateImageException;
 import ru.soune.nocopy.exception.FileEntityNotFoundException;
 import ru.soune.nocopy.repository.FileEntityRepository;
@@ -16,6 +17,7 @@ import ru.soune.nocopy.repository.SimilarImageProjection;
 import ru.soune.nocopy.service.FileSimilarityService;
 import ru.soune.nocopy.service.ImageHashService;
 
+import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -110,6 +112,39 @@ public class FileEntityService {
         return convertToResponse(fileEntity, version);
     }
 
+    @Transactional(readOnly = true)
+    public FileEntityResponse getByFilePath(String filePath, int version) {
+        FileEntity fileEntity = fileEntityRepository.findByFilePath(filePath)
+                .orElseThrow(() -> new FileEntityNotFoundException("Path: " + filePath));
+
+        return convertToResponse(fileEntity, version);
+    }
+
+
+    @Transactional(readOnly = true)
+    public FileResponse getAllUserFiles(Long userId, int version) {
+        List<FileEntity> fileEntities = fileEntityRepository.findByUserIdAndStatus(
+                userId, FileStatus.ACTIVE);
+
+        List<FileEntityResponse> files = fileEntities.stream()
+                .map(file -> convertToResponse(file, version))
+                .collect(Collectors.toList());
+
+        long totalSize = fileEntities.stream()
+                .mapToLong(FileEntity::getFileSize)
+                .sum();
+
+        return FileResponse.builder()
+                .files(files)
+                .totalCount(files.size())
+                .totalSize(totalSize)
+                .formattedTotalSize(formatFileSize(totalSize))
+                .page(1)
+                .pageSize(files.size())
+                .build();
+    }
+
+
     @Transactional(readOnly = true)
     public FileResponse getUserFiles(Long userId, int page, int pageSize, int version) {
         List<FileEntity> allFiles = fileEntityRepository.findByUserIdAndStatus(
@@ -178,6 +213,95 @@ public class FileEntityService {
         return totalSize != null ? totalSize : 0L;
     }
 
+    public void changeStatus(ProtectionStatus newStatus, String fileId) {
+        FileEntity fileEntity = fileEntityRepository.findById(fileId)
+                .orElseThrow(() -> new FileEntityNotFoundException(fileId));
+        fileEntity.setProtectionStatus(newStatus);
+
+        fileEntityRepository.save(fileEntity);
+    }
+
+    @Transactional
+    public void writeProtectedFile(String id, byte[] data, String fileExt) throws IOException {
+        FileEntity fileEntity = fileEntityRepository.findById(id)
+                .orElseThrow(() -> new RuntimeException("File not found: " + id));
+
+        String extension = determineFileExtension(fileExt, fileEntity);
+        Path protectedFilePath = prepareProtectedPath(fileEntity, extension);
+
+        if (Files.exists(protectedFilePath)) {
+            Files.delete(protectedFilePath);
+        }
+
+        Files.write(protectedFilePath, data);
+
+        fileEntity.setProtectedFilePath(protectedFilePath.toString());
+        fileEntity.setProtectedAt(LocalDateTime.now());
+        fileEntity.setUpdatedAt(LocalDateTime.now());
+        fileEntity.setFileExtension(extension);
+        fileEntity.setProtectionStatus(ProtectionStatus.PROTECTED);
+
+        fileEntityRepository.save(fileEntity);
+    }
+
+    public FileEntity findBySignature(String signature) {
+        return fileEntityRepository.findBySignature(signature);
+    }
+
+    public File getFileById(String id) {
+        try {
+            FileEntity fileEntity = fileEntityRepository.findById(id).orElseThrow(() ->
+                    new RuntimeException("File not found: " + id));
+
+            File file = new File(fileEntity.getFilePath());
+
+            if (!file.exists()) {
+                throw new RuntimeException("File not found on disk: " + fileEntity.getFilePath());
+            }
+
+            return file;
+        } catch (Exception e) {
+            log.error("Error getting file: {}", id, e);
+            return null;
+        }
+    }
+
+    public Path prepareProtectedPath(FileEntity fileEntity, String extension) throws IOException {
+        Path originalPath = Paths.get(fileEntity.getFilePath());
+
+        String pathStr = originalPath.toString();
+        pathStr = pathStr.replaceFirst("/uploads/uploads/", "/uploads/protected/");
+
+        Path protectedPath = Paths.get(pathStr);
+        String fileName = protectedPath.getFileName().toString();
+
+        if (extension != null) {
+            String nameWithoutExt = fileName;
+            int lastDotIndex = fileName.lastIndexOf('.');
+            if (lastDotIndex > 0) {
+                nameWithoutExt = fileName.substring(0, lastDotIndex);
+            }
+            fileName = nameWithoutExt + "." + extension;
+
+            protectedPath = protectedPath.getParent().resolve(fileName);
+        }
+
+        Files.createDirectories(protectedPath.getParent());
+
+        return protectedPath;
+    }
+
+    public void updateSignature(String signature, String fileId) throws IOException {
+        FileEntity fileEntity = fileEntityRepository.findByFileId(fileId);
+        fileEntity.setSignature(signature);
+        fileEntity.setProtectionStatus(ProtectionStatus.PROTECTED);
+        fileEntity.setUpdatedAt(LocalDateTime.now());
+        fileEntity.setProtectedAt(LocalDateTime.now());
+        fileEntity.setProtectedFilePath(prepareProtectedPath(fileEntity, fileEntity.getFileExtension()).toString());
+
+        fileEntityRepository.save(fileEntity);
+    }
+
     private boolean checkFileExistsOnDisk(String filePath) {
         try {
             return Files.exists(Paths.get(filePath));
@@ -187,6 +311,14 @@ public class FileEntityService {
         }
     }
 
+    private String determineFileExtension(String fileExt, FileEntity fileEntity) {
+        if (fileExt != null && !fileExt.trim().isEmpty()) {
+            return fileExt;
+        } else {
+            return fileEntity.getFileExtension();
+        }
+    }
+
     private FileEntityResponse convertToResponse(FileEntity fileEntity, int version) {
         boolean existsOnDisk = checkFileExistsOnDisk(fileEntity.getFilePath());
 

src/main/java/ru/soune/nocopy/service/file/NoCopyProcessingListener.java

@@ -1,46 +0,0 @@
-package ru.soune.nocopy.service.file;
-
-import com.vrt.fileprotection.FileProtector;
-import lombok.AllArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.stereotype.Component;
-import ru.soune.nocopy.entity.file.FileEntity;
-import ru.soune.nocopy.entity.file.ProtectionStatus;
-import ru.soune.nocopy.exception.FileEntityNotFoundException;
-import ru.soune.nocopy.repository.FileEntityRepository;
-
-@Slf4j
-@Component
-@AllArgsConstructor
-public class NoCopyProcessingListener implements FileProtector.ProcessingListener {
-
-    private final FileEntityRepository fileEntityRepository;
-
-    @Override
-    public void onStartProcessing(FileProtector.FileInfo fileInfo) {
-        changeStatus(ProtectionStatus.PROCESSING, fileInfo.getId());
-    }
-
-    @Override
-    public void onProcessingFailed(FileProtector.FileInfo fileInfo) {
-        changeStatus(ProtectionStatus.FAILED, fileInfo.getId());
-    }
-
-    @Override
-    public void onSavingFailed(FileProtector.FileInfo fileInfo) {
-        changeStatus(ProtectionStatus.FAILED_SAVE, fileInfo.getId());
-    }
-
-    @Override
-    public void onFinish(FileProtector.FileInfo fileInfo) {
-        changeStatus(ProtectionStatus.PROTECTED, fileInfo.getId());;
-    }
-
-    private void changeStatus(ProtectionStatus newStatus, String fileId) {
-        FileEntity fileEntity = fileEntityRepository.findById(fileId)
-                .orElseThrow(() -> new FileEntityNotFoundException(fileId));
-        fileEntity.setProtectionStatus(newStatus);
-
-        fileEntityRepository.save(fileEntity);
-    }
-}

src/main/java/ru/soune/nocopy/service/file/ProtectionFileProvider.java

@@ -1,166 +0,0 @@
-package ru.soune.nocopy.service.file;
-
-import com.vrt.fileprotection.FileProtector;
-import com.vrt.fileprotection.OperationResult;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-import org.springframework.stereotype.Component;
-import ru.soune.nocopy.entity.file.FileEntity;
-import ru.soune.nocopy.repository.FileEntityRepository;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.time.LocalDateTime;
-
-@Slf4j
-@Component
-@RequiredArgsConstructor
-public class ProtectionFileProvider implements FileProtector.FileProvider {
-
-
-    private final FileEntityRepository fileRepository;
-
-    @Nullable
-    @Override
-    public File getImageFile(@NotNull String id) {
-        return getFileById(id);
-    }
-
-    @Nullable
-    @Override
-    public File getVideoFile(@NotNull String id) {
-        return getFileById(id);
-    }
-
-    @Nullable
-    @Override
-    public File getAudioFile(@NotNull String id) {
-        return getFileById(id);
-    }
-
-    @NotNull
-    @Override
-    public com.vrt.fileprotection.OperationResult writeSignature(@NotNull String s, @NotNull byte[] bytes) {
-        return null;
-    }
-
-    @NotNull
-    @Override
-    public com.vrt.fileprotection.OperationResult writeAudioFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
-        try {
-            writeProtectedFile(id, data, fileExt);
-            return OperationResult.Companion.success();
-        } catch (Exception e) {
-            log.error("Failed to create protected file: {}", id, e);
-            return OperationResult.Companion.failure("Failed to create protected file");
-        }
-    }
-
-    @NotNull
-    @Override
-    public com.vrt.fileprotection.OperationResult writeVideoFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
-        try {
-            writeProtectedFile(id, data, fileExt);
-            return OperationResult.Companion.success();
-        } catch (Exception e) {
-            log.error("Failed to create protected file: {}", id, e);
-            return OperationResult.Companion.failure("Failed to create protected file");
-        }
-    }
-
-    @NotNull
-    @Override
-    public com.vrt.fileprotection.OperationResult writeImageFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
-        try {
-            writeProtectedFile(id, data, fileExt);
-            return OperationResult.Companion.success();
-        } catch (Exception e) {
-            log.error("Failed to create protected file: {}", id, e);
-            return OperationResult.Companion.failure("Failed to create protected file");
-        }
-    }
-
-    @Nullable
-    @Override
-    public File getSignature(@NotNull String s) {
-        return null;
-    }
-
-    private void writeProtectedFile(String id, byte[] data, String fileExt) throws IOException {
-        FileEntity fileEntity = fileRepository.findById(id)
-                .orElseThrow(() -> new RuntimeException("File not found: " + id));
-
-        String extension = determineFileExtension(fileExt, fileEntity);
-        Path protectedFilePath = prepareProtectedPath(fileEntity, extension);
-
-        if (Files.exists(protectedFilePath)) {
-            Files.delete(protectedFilePath);
-        }
-
-        Files.write(protectedFilePath, data);
-
-        fileEntity.setProtectedFilePath(protectedFilePath.toString());
-        fileEntity.setProtectedAt(LocalDateTime.now());
-        fileEntity.setUpdatedAt(LocalDateTime.now());
-        fileEntity.setFileExtension(extension);
-
-        fileRepository.save(fileEntity);
-    }
-
-
-    private File getFileById(String id) {
-        try {
-            FileEntity fileEntity = fileRepository.findById(id).orElseThrow(() ->
-                    new RuntimeException("File not found: " + id));
-
-            File file = new File(fileEntity.getFilePath());
-
-            if (!file.exists()) {
-                throw new RuntimeException("File not found on disk: " + fileEntity.getFilePath());
-            }
-
-            return file;
-        } catch (Exception e) {
-            log.error("Error getting file: {}", id, e);
-            return null;
-        }
-    }
-
-    private String determineFileExtension(String fileExt, FileEntity fileEntity) {
-        if (fileExt != null && !fileExt.trim().isEmpty()) {
-            return fileExt;
-        } else {
-            return fileEntity.getFileExtension();
-        }
-    }
-
-    private Path prepareProtectedPath(FileEntity fileEntity, String extension) throws IOException {
-        Path originalPath = Paths.get(fileEntity.getFilePath());
-
-        String pathStr = originalPath.toString();
-        pathStr = pathStr.replaceFirst("/uploads/uploads/", "/uploads/protected/");
-
-        Path protectedPath = Paths.get(pathStr);
-        String fileName = protectedPath.getFileName().toString();
-
-        if (extension != null) {
-            String nameWithoutExt = fileName;
-            int lastDotIndex = fileName.lastIndexOf('.');
-            if (lastDotIndex > 0) {
-                nameWithoutExt = fileName.substring(0, lastDotIndex);
-            }
-            fileName = nameWithoutExt + "." + extension;
-
-            protectedPath = protectedPath.getParent().resolve(fileName);
-        }
-
-        Files.createDirectories(protectedPath.getParent());
-
-        return protectedPath;
-    }
-}

src/main/java/ru/soune/nocopy/service/file/impl/AudioFilePathProviderImpl.java

@@ -0,0 +1,44 @@
+package ru.soune.nocopy.service.file.impl;
+
+import com.vrt.AudioFilePathProvider;
+import com.vrt.fileprotection.FileProtector;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.jetbrains.annotations.NotNull;
+import org.springframework.stereotype.Service;
+import ru.soune.nocopy.entity.file.FileEntity;
+import ru.soune.nocopy.repository.FileEntityRepository;
+import ru.soune.nocopy.service.file.FileEntityService;
+
+import java.io.IOException;
+import java.util.Optional;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class AudioFilePathProviderImpl implements AudioFilePathProvider {
+
+    private final FileEntityService fileEntityService;
+
+    private final FileEntityRepository fileEntityRepository;
+
+    @Override
+    public @NotNull String providePath(@NotNull FileProtector.FileInfo fileInfo) {
+        String filePath;
+        Optional<FileEntity> optionalFileEntity = fileEntityRepository.findById(fileInfo.getId());
+
+        if (optionalFileEntity.isEmpty()) {
+            throw new NullPointerException();
+        }
+
+        FileEntity fileEntity = optionalFileEntity.get();
+
+        try {
+            filePath = fileEntityService.prepareProtectedPath(fileEntity, fileEntity.getFileExtension()).toString();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        return filePath;
+    }
+}

src/main/java/ru/soune/nocopy/service/file/impl/AudioLocalSearchImpl.java

@@ -0,0 +1,39 @@
+package ru.soune.nocopy.service.file.impl;
+
+import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.audio.AudioLocalSearch;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.springframework.stereotype.Service;
+import ru.soune.nocopy.service.file.FileEntityService;
+import ru.soune.nocopy.util.FileUtil;
+
+import java.io.IOException;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class AudioLocalSearchImpl implements AudioLocalSearch {
+
+    private final FileEntityService fileEntityService;
+
+    private final FileUtil fileUtil;
+
+    @Override
+    public @Nullable FileProtector.FileInfo findBySignature(@NotNull String signature) {
+        return fileUtil.createFileInfo(fileEntityService.findBySignature(signature));
+    }
+
+    @Override
+    public void updateSignature(@NotNull String signature, @NotNull FileProtector.FileInfo fileInfo) {
+        try {
+            fileEntityService.updateSignature(signature, fileInfo.getId());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+
+}

src/main/java/ru/soune/nocopy/service/file/impl/FileUploadServiceImpl.java

@@ -1,4 +1,4 @@
-package ru.soune.nocopy.service.file;
+package ru.soune.nocopy.service.file.impl;
 
 import jakarta.annotation.PostConstruct;
 import lombok.RequiredArgsConstructor;
@@ -23,6 +23,8 @@ import ru.soune.nocopy.repository.FileUploadSessionRepository;
 import ru.soune.nocopy.repository.SimilarImageProjection;
 import ru.soune.nocopy.service.FileSimilarityService;
 import ru.soune.nocopy.service.ImageHashService;
+import ru.soune.nocopy.service.file.FileEntityService;
+import ru.soune.nocopy.service.file.FileUploadService;
 
 import java.io.*;
 import java.nio.file.*;

src/main/java/ru/soune/nocopy/service/file/impl/ImageLocalSearchImpl.java

@@ -0,0 +1,54 @@
+package ru.soune.nocopy.service.file.impl;
+
+import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.image.ImageLocalSearch;
+import com.vrt.fileprotection.image.phash.PHash;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.springframework.stereotype.Service;
+import ru.soune.nocopy.dto.file.SimilarFileDTO;
+import ru.soune.nocopy.entity.file.FileEntity;
+import ru.soune.nocopy.entity.file.ImageHashEntity;
+import ru.soune.nocopy.repository.FileEntityRepository;
+import ru.soune.nocopy.repository.ImageHashRepository;
+import ru.soune.nocopy.service.FileSimilarityService;
+import ru.soune.nocopy.util.FileUtil;
+
+import java.util.List;
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class ImageLocalSearchImpl implements ImageLocalSearch {
+
+    private final FileSimilarityService fileSimilarityService;
+
+    private final ImageHashRepository imageHashRepository;
+
+    private final FileUtil fileUtil;
+
+    private final FileEntityRepository fileEntityRepository;
+
+    @Override
+    public @NotNull List<Result> find(@NotNull FileProtector.FileInfo fileInfo) {
+        List<SimilarFileDTO> duplicateByHammingDistance =
+                fileSimilarityService.findDuplicateByHammingDistance(fileInfo.getId(), 10,
+                        5, 10);
+
+        return duplicateByHammingDistance.stream()
+                .map(fileUtil::convertToResult)
+                .toList();
+    }
+
+    @Override
+    public @Nullable FileProtector.FileInfo findByPHash(@NotNull PHash pHash) {
+        ImageHashEntity imageHashEntity =
+                imageHashRepository.findByHash64HiAndHash64Lo(Math.toIntExact(pHash.getFirstPart()),
+                        Math.toIntExact(pHash.getSecondPart()));
+        FileEntity file = fileEntityRepository.findByFileId(imageHashEntity.getFileId());
+
+        return new FileProtector.FileInfo(FileProtector.Type.IMAGE, imageHashEntity.getFileId(),
+                String.valueOf(file.getUserId()));
+    }
+}

src/main/java/ru/soune/nocopy/service/file/impl/ImageUniqueCheckImpl.java

@@ -0,0 +1,34 @@
+package ru.soune.nocopy.service.file.impl;
+
+import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.OperationResult;
+import com.vrt.fileprotection.image.ImageUniqueCheck;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.jetbrains.annotations.NotNull;
+import org.springframework.stereotype.Service;
+import ru.soune.nocopy.dto.file.SimilarFileDTO;
+import ru.soune.nocopy.service.FileSimilarityService;
+
+import java.util.List;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class ImageUniqueCheckImpl implements ImageUniqueCheck {
+
+    private final FileSimilarityService fileSimilarityService;
+
+    @Override
+    public @NotNull OperationResult check(@NotNull FileProtector.FileInfo fileInfo) {
+        String fileId = fileInfo.getId();
+        List<SimilarFileDTO> duplicateByHammingDistance =
+                fileSimilarityService.findDuplicateByHammingDistance(fileId, 3, 3, 4);
+
+        if (duplicateByHammingDistance == null || duplicateByHammingDistance.isEmpty()) {
+            return OperationResult.Companion.success();
+        } else {
+            return OperationResult.Companion.failure("Duplicate file");
+        }
+    }
+}

src/main/java/ru/soune/nocopy/service/file/impl/NoCopyProcessingListenerImpl.java

@@ -0,0 +1,36 @@
+package ru.soune.nocopy.service.file.impl;
+
+import com.vrt.fileprotection.FileProtector;
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+import ru.soune.nocopy.entity.file.ProtectionStatus;
+import ru.soune.nocopy.service.file.FileEntityService;
+
+@Slf4j
+@Component
+@AllArgsConstructor
+public class NoCopyProcessingListenerImpl implements FileProtector.ProcessingListener {
+
+    private final FileEntityService fileEntityService;
+
+    @Override
+    public void onStartProcessing(FileProtector.FileInfo fileInfo) {
+        fileEntityService.changeStatus(ProtectionStatus.PROCESSING, fileInfo.getId());
+    }
+
+    @Override
+    public void onProcessingFailed(FileProtector.FileInfo fileInfo) {
+        fileEntityService.changeStatus(ProtectionStatus.FAILED, fileInfo.getId());
+    }
+
+    @Override
+    public void onSavingFailed(FileProtector.FileInfo fileInfo) {
+        fileEntityService.changeStatus(ProtectionStatus.FAILED_SAVE, fileInfo.getId());
+    }
+
+    @Override
+    public void onFinish(FileProtector.FileInfo fileInfo) {
+        fileEntityService.changeStatus(ProtectionStatus.PROTECTED, fileInfo.getId());;
+    }
+}

src/main/java/ru/soune/nocopy/service/file/impl/ProtectionFileProviderImpl.java

@@ -0,0 +1,84 @@
+package ru.soune.nocopy.service.file.impl;
+
+import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.OperationResult;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.springframework.stereotype.Component;
+import ru.soune.nocopy.service.file.FileEntityService;
+
+import java.io.File;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class ProtectionFileProviderImpl implements FileProtector.FileProvider {
+
+    private final FileEntityService fileEntityService;
+
+    @Nullable
+    @Override
+    public File getImageFile(@NotNull String id) {
+        return fileEntityService.getFileById(id);
+    }
+
+    @Nullable
+    @Override
+    public File getVideoFile(@NotNull String id) {
+        return fileEntityService.getFileById(id);
+    }
+
+    @Nullable
+    @Override
+    public File getAudioFile(@NotNull String id) {
+        return fileEntityService.getFileById(id);
+    }
+
+    @Override
+    public @Nullable File getSignature() {
+        return null;
+    }
+
+    @NotNull
+    @Override
+    public com.vrt.fileprotection.OperationResult writeAudioFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
+        try {
+            fileEntityService.writeProtectedFile(id, data, fileExt);
+            return OperationResult.Companion.success();
+        } catch (Exception e) {
+            log.error("Failed to create protected file: {}", id, e);
+            return OperationResult.Companion.failure("Failed to create protected file");
+        }
+    }
+
+    @NotNull
+    @Override
+    public com.vrt.fileprotection.OperationResult writeVideoFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
+        try {
+            fileEntityService.writeProtectedFile(id, data, fileExt);
+            return OperationResult.Companion.success();
+        } catch (Exception e) {
+            log.error("Failed to create protected file: {}", id, e);
+            return OperationResult.Companion.failure("Failed to create protected file");
+        }
+    }
+
+    @NotNull
+    @Override
+    public com.vrt.fileprotection.OperationResult writeImageFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
+        try {
+            fileEntityService.writeProtectedFile(id, data, fileExt);
+            return OperationResult.Companion.success();
+        } catch (Exception e) {
+            log.error("Failed to create protected file: {}", id, e);
+            return OperationResult.Companion.failure("Failed to create protected file");
+        }
+    }
+
+    @Override
+    public @NotNull OperationResult writeSignature(@NotNull byte[] bytes) {
+        return null;
+    }
+}

src/main/java/ru/soune/nocopy/util/FileUtil.java

@@ -0,0 +1,48 @@
+package ru.soune.nocopy.util;
+
+import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.image.ImageLocalSearch;
+import com.vrt.fileprotection.image.ImageScore;
+import org.springframework.stereotype.Service;
+import ru.soune.nocopy.dto.file.SimilarFileDTO;
+import ru.soune.nocopy.entity.file.FileEntity;
+
+@Service
+public class FileUtil {
+    public ImageLocalSearch.Result convertToResult(SimilarFileDTO response) {
+        FileProtector.FileInfo fileInfo =
+                new FileProtector.FileInfo(FileProtector.Type.IMAGE, response.getFileId(),
+                        String.valueOf(response.getOwnerId()));
+        ImageScore imageScore = new ImageScore(ImageScore.Rate.valueOf(response.getSimilarityLevel()),
+                response.getHammingDistance());
+
+        return new ImageLocalSearch.Result(fileInfo, imageScore);
+    }
+
+    public FileProtector.FileInfo createFileInfo(FileEntity fileEntity) {
+        FileProtector.Type type = determineFileType(fileEntity.getMimeType());
+
+        return new FileProtector.FileInfo(type, fileEntity.getId(), String.valueOf(fileEntity.getUserId()));
+    }
+
+    public int hamming64(int aHi, int aLo, int bHi, int bLo) {
+        return Integer.bitCount(aHi ^ bHi)
+                + Integer.bitCount(aLo ^ bLo);
+    }
+
+    private FileProtector.Type determineFileType(String mimeType) {
+        if (mimeType == null) {
+            return FileProtector.Type.IMAGE;
+        }
+
+        if (mimeType.startsWith("image")) {
+            return FileProtector.Type.IMAGE;
+        } else if (mimeType.startsWith("video")) {
+            return FileProtector.Type.VIDEO;
+        } else if (mimeType.startsWith("audio")) {
+            return FileProtector.Type.AUDIO;
+        } else {
+            return FileProtector.Type.IMAGE;
+        }
+    }
+}