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

2026-01-22 19:55:09 +07:00
parent 95deda12f3
commit 409c677ba6
22 changed files with 598 additions and 411 deletions
@@ -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;
+        }
+    }
+}