[ResourceBundle] add Pimcore DeepCopy Subscriber to fix doctrine collections clone problem

src/CoreShop/Bundle/ResourceBundle/EventListener/DeepCopySubscriber.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * CoreShop.
+ *
+ * This source file is subject to the GNU General Public License version 3 (GPLv3)
+ * For the full copyright and license information, please view the LICENSE.md and gpl-3.0.txt
+ * files that are distributed with this source code.
+ *
+ * @copyright  Copyright (c) 2015-2020 Dominik Pfaffenbauer (https://www.pfaffenbauer.at)
+ * @license    https://www.coreshop.org/license     GNU General Public License version 3 (GPLv3)
+ */
+
+namespace CoreShop\Bundle\ResourceBundle\EventListener;
+
+use DeepCopy\DeepCopy;
+use DeepCopy\Filter\Doctrine\DoctrineCollectionFilter;
+use DeepCopy\Matcher\PropertyTypeMatcher;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\EventDispatcher\GenericEvent;
+
+class DeepCopySubscriber implements EventSubscriberInterface
+{
+    public static function getSubscribedEvents()
+    {
+        //TODO: Change to Pimcore\Event\SystemEvents::SERVICE_PRE_GET_DEEP_COPY later
+        //TODO: Event has been added with 6.8.5, min requirement is 6.6 for now.
+        return [
+            'pimcore.system.service.preGetDeepCopy' => 'addDoctrineCollectionFilter',
+        ];
+    }
+
+    public function addDoctrineCollectionFilter(GenericEvent $event)
+    {
+        $context = $event->getArgument('context');
+
+        //Only add if not already been added
+        if (!($context['defaultFilters'] ?? false)) {
+            /**
+             * @var DeepCopy $copier
+             */
+            $copier = $event->getArgument('copier');
+            $copier->addFilter(new DoctrineCollectionFilter(),
+                new PropertyTypeMatcher('Doctrine\Common\Collections\Collection'));
+            $event->setArgument('copier', $copier);
+        }
+    }
+}

src/CoreShop/Bundle/ResourceBundle/Resources/config/services.yml

@@ -92,3 +92,7 @@ services:
         decorates: 'jms_serializer.metadata.annotation_driver'
         arguments:
             - '@CoreShop\Bundle\ResourceBundle\Serialization\Driver\PimcoreDataObjectDriver.inner'
+
+    CoreShop\Bundle\ResourceBundle\EventListener\DeepCopySubscriber:
+        tags:
+            - { name: kernel.event_subscriber }