Started implementing an Oauth server

src/Security/OAuth/Entity/TransientRefreshToken.php

@@ -0,0 +1,40 @@
+<?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\OAuth\Entity;
+
+use League\OAuth2\Server\Entities\RefreshTokenEntityInterface;
+use League\OAuth2\Server\Entities\Traits\EntityTrait;
+use League\OAuth2\Server\Entities\Traits\RefreshTokenTrait;
+
+/**
+ * A purely in-memory RefreshTokenEntityInterface used only while league/oauth2-server is issuing a
+ * refresh token. league/oauth2-server itself never stores the refresh token's content server-side -
+ * it hands the client an encrypted, self-contained payload and decrypts/validates it directly on the
+ * next request. Our RefreshTokenRepository only needs to persist a small revocation record
+ * (App\Entity\UserSystem\OAuth\OAuthRefreshToken) keyed by identifier; see that repository.
+ */
+class TransientRefreshToken implements RefreshTokenEntityInterface
+{
+    use EntityTrait;
+    use RefreshTokenTrait;
+}