first version

kirby/src/Cms/UserPermissions.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Kirby\Cms;
+
+class UserPermissions extends ModelPermissions
+{
+    protected $category = 'users';
+
+    public function __construct(Model $model)
+    {
+        parent::__construct($model);
+
+        // change the scope of the permissions, when the current user is this user
+        $this->category = $this->user && $this->user->is($model) ? 'user' : 'users';
+    }
+
+    protected function canChangeRole(): bool
+    {
+        return $this->model->isLastAdmin() !== true;
+    }
+
+    protected function canDelete(): bool
+    {
+        return $this->model->isLastAdmin() !== true;
+    }
+}