Improved structure of the PartKeepr import

src/Services/ImportExportSystem/PartKeeprImporter/PKImportHelper.php

@@ -0,0 +1,50 @@
+<?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/>.
+ */
+
+namespace App\Services\ImportExportSystem\PartKeeprImporter;
+
+use App\Doctrine\Purger\ResetAutoIncrementORMPurger;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * This service contains various helper functions for the PartKeeprImporter (like purging the database).
+ */
+class PKImportHelper
+{
+    protected EntityManagerInterface $em;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    /**
+     * Purges the database tables for the import, so that all data can be created from scratch.
+     * Existing users and groups are not purged.
+     * This is needed to avoid ID collisions.
+     * @return void
+     */
+    public function purgeDatabaseForImport(): void
+    {
+        //Versions with "" are needed !!
+        $purger = new ResetAutoIncrementORMPurger($this->em, ['users', '"users"', 'groups', '"groups"', 'u2f_keys', 'internal', 'migration_versions']);
+        $purger->purge();
+    }
+}