Added basic logic for impersonation

src/Security/Voter/ImpersonateUserVoter.php

@@ -0,0 +1,60 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\Security\Voter;
+
+use App\Entity\UserSystem\User;
+use App\Services\UserSystem\PermissionManager;
+use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Core\Authorization\Voter\Voter;
+use Symfony\Component\Security\Core\User\UserInterface;
+
+class ImpersonateUserVoter extends Voter
+{
+
+    public function __construct(private PermissionManager $permissionManager)
+    {
+    }
+
+    protected function supports(string $attribute, mixed $subject): bool
+    {
+        return $attribute == 'CAN_SWITCH_USER'
+            && $subject instanceof UserInterface;
+    }
+
+    protected function voteOnAttribute(string $attribute, mixed $subject, TokenInterface $token): bool
+    {
+        $user = $token->getUser();
+
+        if (!$user instanceof User || !$subject instanceof UserInterface) {
+            return false;
+        }
+
+        //An disabled user is not allowed to do anything...
+        if ($user->isDisabled()) {
+            return false;
+        }
+
+        return $this->permissionManager->inherit($user, 'users', 'impersonate') ?? false;
+    }
+}