Allow to import category, footprint and manufacturer by giving a string in the CSV file

src/Serializer/StructuralElementFromNameDenormalizer.php

@@ -0,0 +1,63 @@
+<?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\Serializer;
+
+use App\Entity\Base\AbstractStructuralDBElement;
+use App\Form\Type\StructuralEntityType;
+use App\Repository\StructuralDBElementRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Serializer\Normalizer\ContextAwareDenormalizerInterface;
+
+class StructuralElementFromNameDenormalizer implements ContextAwareDenormalizerInterface
+{
+    private EntityManagerInterface $em;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    public function supportsDenormalization($data, string $type, string $format = null, array $context = [])
+    {
+        return is_string($data) && is_subclass_of($type, AbstractStructuralDBElement::class);
+    }
+
+    public function denormalize($data, string $type, string $format = null, array $context = [])
+    {
+        //Retrieve the repository for the given type
+        /** @var StructuralDBElementRepository $repo */
+        $repo = $this->em->getRepository($type);
+
+        $path_delimiter = $context['path_delimiter'] ?? '->';
+
+        if ($context['create_unknown_datastructures'] ?? false) {
+            $elements = $repo->getNewEntityFromPath($data, $path_delimiter);
+            //Persist all new elements
+            foreach ($elements as $element) {
+                $this->em->persist($element);
+            }
+            return end($elements);
+        }
+
+        $elements = $repo->getEntityByPath($data, $path_delimiter);
+        return end($elements);
+    }
+}