Allow to disable a user in admin settings.

When a user is disabled, he can not login.

src/Security/UserChecker.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ *
+ * part-db version 0.1
+ * Copyright (C) 2005 Christoph Lechner
+ * http://www.cl-projects.de/
+ *
+ * part-db version 0.2+
+ * Copyright (C) 2009 K. Jacobs and others (see authors.php)
+ * http://code.google.com/p/part-db/
+ *
+ * Part-DB Version 0.4+
+ * Copyright (C) 2016 - 2019 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 General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ */
+
+namespace App\Security;
+
+
+use App\Entity\UserSystem\User;
+use Symfony\Component\Security\Core\Exception\AccountStatusException;
+use Symfony\Component\Security\Core\Exception\DisabledException;
+use Symfony\Component\Security\Core\User\UserCheckerInterface;
+use Symfony\Component\Security\Core\User\UserInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
+use Throwable;
+
+class UserChecker implements UserCheckerInterface
+{
+    protected $translator;
+
+    public function __construct(TranslatorInterface $translator)
+    {
+        $this->translator = $translator;
+    }
+
+    /**
+     * Checks the user account before authentication.
+     *
+     * @throws AccountStatusException
+     */
+    public function checkPreAuth(UserInterface $user)
+    {
+        // TODO: Implement checkPreAuth() method.
+    }
+
+    /**
+     * Checks the user account after authentication.
+     *
+     * @throws AccountStatusException
+     */
+    public function checkPostAuth(UserInterface $user)
+    {
+        if (!$user instanceof User) {
+            return;
+        }
+
+        //Check if user is disabled. Then dont allow login
+        if ($user->isDisabled()) {
+            throw new DisabledException();
+        }
+    }
+}