From f88b7c3c2be6fde3d02d7f1f88ffacfe89c45072 Mon Sep 17 00:00:00 2001
From: Sabina Talipova <87288324+sabina-talipova@users.noreply.github.com>
Date: Mon, 12 Jun 2023 13:29:06 +1200
Subject: [PATCH] FIX Duplicate page keeps original pages canView and canEdit
 permission (#10806)

---
 src/Security/InheritedPermissionsExtension.php | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/Security/InheritedPermissionsExtension.php b/src/Security/InheritedPermissionsExtension.php
index 88f6c93a6..df069b5c6 100644
--- a/src/Security/InheritedPermissionsExtension.php
+++ b/src/Security/InheritedPermissionsExtension.php
@@ -15,18 +15,23 @@ use SilverStripe\ORM\ManyManyList;
  */
 class InheritedPermissionsExtension extends DataExtension
 {
-    private static $db = [
+    private static array $db = [
         'CanViewType' => "Enum('Anyone, LoggedInUsers, OnlyTheseUsers, Inherit', 'Inherit')",
         'CanEditType' => "Enum('LoggedInUsers, OnlyTheseUsers, Inherit', 'Inherit')",
     ];
 
-    private static $many_many = [
+    private static array $many_many = [
         'ViewerGroups' => Group::class,
         'EditorGroups' => Group::class,
     ];
 
-    private static $defaults = [
+    private static array $defaults = [
         'CanViewType' => InheritedPermissions::INHERIT,
         'CanEditType' => InheritedPermissions::INHERIT,
     ];
+
+    private static array $cascade_duplicates = [
+        'ViewerGroups',
+        'EditorGroups',
+    ];
 }