dev add method link

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

@@ -6,10 +6,13 @@ import lombok.*;
 import org.springframework.data.annotation.CreatedDate;
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+import ru.soune.nocopy.entity.file.permission.PermissionType;
 import ru.soune.nocopy.entity.monitoring.FileMonitoringEntity;
 
 import java.time.LocalDateTime;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
 
 @Data
@@ -92,6 +95,14 @@ public class FileEntity {
     @Column
     private String newExtension;
 
+    @ElementCollection
+    @CollectionTable(name = "file_permissions",
+            joinColumns = @JoinColumn(name = "file_id"))
+    @Column(name = "allowed")
+    @MapKeyEnumerated(EnumType.STRING)
+    @MapKeyColumn(name = "permission_type")
+    private Map<PermissionType, Boolean> permissions = new HashMap<>();
+
     @OneToOne(mappedBy = "file", cascade = CascadeType.ALL, orphanRemoval = true)
     @JsonIgnore
     private ImageHashEntity imageHash;
@@ -113,6 +124,15 @@ public class FileEntity {
         if (this.createdAt == null) {
             this.createdAt = LocalDateTime.now();
         }
+
+        if (this.permissions == null) {
+            this.permissions = new HashMap<>();
+            this.permissions.put(PermissionType.DOWNLOAD, true);
+//            this.permissions.put(PermissionType.VIEW, true);
+//            this.permissions.put(PermissionType.EDIT, true);
+        }
+
+
         this.updatedAt = LocalDateTime.now();
     }
 
@@ -124,4 +144,29 @@ public class FileEntity {
     public static void initializeCounter(int maxId) {
         supportIdCounter = new AtomicInteger(maxId);
     }
+
+    @Transient
+    public boolean hasPermission(PermissionType type) {
+        return permissions.getOrDefault(type, false);
+    }
+
+    @Transient
+    public void setPermission(PermissionType type, boolean allowed) {
+        permissions.put(type, allowed);
+    }
+
+    @Transient
+    public boolean canDownload() {
+        return hasPermission(PermissionType.DOWNLOAD);
+    }
+
+//    @Transient
+//    public boolean canView() {
+//        return hasPermission(PermissionType.VIEW);
+//    }
+//
+//    @Transient
+//    public boolean canEdit() {
+//        return hasPermission(PermissionType.EDIT);
+//    }
 }

src/main/java/ru/soune/nocopy/entity/file/permission/PermissionType.java

@@ -0,0 +1,27 @@
+package ru.soune.nocopy.entity.file.permission;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public enum PermissionType {
+    DOWNLOAD;
+
+    public static Set<String> getValidPermissionNames() {
+        return Arrays.stream(PermissionType.values())
+                .map(Enum::name)
+                .collect(Collectors.toSet());
+    }
+
+    public static Set<String> getInvalidPermissions(Map<String, Boolean> permissions) {
+        Set<String> validNames = getValidPermissionNames();
+        return permissions.keySet().stream()
+                .filter(key -> !validNames.contains(key))
+                .collect(Collectors.toSet());
+    }
+
+    public static boolean areAllValid(Map<String, Boolean> permissions) {
+        return getInvalidPermissions(permissions).isEmpty();
+    }
+}