dev add method link

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

@@ -416,6 +416,7 @@ public class FileEntityService {
                 .fileUploadDate(fileEntity.getCreatedAt())
                 .protectedFilePath(fileEntity.getProtectedFilePath())
                 .thumbnailFileUrl(baseUrl + "/api/files/protected/" + fileEntity.getId() + "/thumbnail")
+                .permissions(fileEntity.getPermissions())
                 .build();
     }
 }

src/main/java/ru/soune/nocopy/service/file/permission/FileAccessService.java

@@ -0,0 +1,24 @@
+package ru.soune.nocopy.service.file.permission;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.soune.nocopy.entity.file.FileEntity;
+import ru.soune.nocopy.entity.file.permission.PermissionType;
+import ru.soune.nocopy.repository.FileEntityRepository;
+
+import java.io.FileNotFoundException;
+
+@Service
+@RequiredArgsConstructor
+public class FileAccessService {
+
+    private final FileEntityRepository fileEntityRepository;
+
+    public void changePermission(String fileId, PermissionType type, boolean allowed) throws FileNotFoundException {
+        FileEntity file = fileEntityRepository.findById(fileId)
+                .orElseThrow(() -> new FileNotFoundException(fileId));
+        file.setPermission(type, allowed);
+
+        fileEntityRepository.save(file);
+    }
+}