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<?php
/*
* Copyright (c) Pickware GmbH. All rights reserved.
* This file is part of software that is released under a proprietary license.
* You must not copy, modify, distribute, make publicly available, or execute
* its contents or parts thereof without express permission by the copyright
* holder, unless otherwise permitted by law.
*/
declare(strict_types=1);
namespace Pickware\PickwareErpStarter\StockApi\Subscriber;
use Pickware\DalBundle\EntityPreWriteValidationEvent;
use Pickware\DalBundle\EntityPreWriteValidationEventDispatcher;
use Pickware\PickwareErpStarter\Config\Config;
use Pickware\PickwareErpStarter\StockApi\StockLocationReference;
use Pickware\PickwareErpStarter\StockApi\TotalStockWriter;
use Shopware\Core\Content\Product\ProductDefinition;
use Shopware\Core\Content\Product\ProductEvents;
use Shopware\Core\Defaults;
use Shopware\Core\Framework\DataAbstractionLayer\Event\EntityWrittenEvent;
use Shopware\Core\Framework\DataAbstractionLayer\Write\Command\WriteCommand;
use Shopware\Core\Framework\Validation\WriteConstraintViolationException;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Validator\ConstraintViolation;
use Symfony\Component\Validator\ConstraintViolationList;
/**
* Listens to changes made to the field "stock" of a product and initiates the corresponding absolute stock change.
*/
class ProductStockSubscriber implements EventSubscriberInterface
{
private Config $config;
private TotalStockWriter $totalStockWriter;
public function __construct(Config $config, TotalStockWriter $totalStockWriter)
{
$this->config = $config;
$this->totalStockWriter = $totalStockWriter;
}
public static function getSubscribedEvents(): array
{
return [
ProductEvents::PRODUCT_WRITTEN_EVENT => 'afterProductWritten',
// ProductEvents::PRODUCT_WRITTEN_EVENT is triggered very late in a write operation an therefore is not in
// the transaction anymore. If the stock of a product is set to a negative value, the TotalStockWriter would
// throw an exception, but since this is not happening in the transaction anymore, the changes were already
// written to the database and won't be reverted. Instead, negative product stock is avoided by adding a
// pre-write-validation.
EntityPreWriteValidationEventDispatcher::getEventName(ProductDefinition::ENTITY_NAME) => 'preWriteValidation',
];
}
public function preWriteValidation($event): void
{
if (!($event instanceof EntityPreWriteValidationEvent)) {
// The subscriber is probably instantiated in its old version (with the Shopware PreWriteValidationEvent) in
// the container and will be updated on the next container rebuild (next request). Early return.
return;
}
// Filter out all WriteCommand for products that will set the stock to a negative value
$invalidWriteCommands = array_filter($event->getCommands(), function (WriteCommand $writeCommand) {
$payload = $writeCommand->getPayload();
return isset($payload['stock']) && $payload['stock'] < 0;
});
if (count($invalidWriteCommands) === 0) {
return;
}
// Add violations for that WriteCommands to the Event
$violations = new ConstraintViolationList();
foreach ($invalidWriteCommands as $invalidWriteCommand) {
$message = 'The value for property "stock" is not allowed to be lower than 0.';
$violation = new ConstraintViolation(
$message, // $message
$message, // $messageTemplate,
[], // $parameters,
null, // $root
$invalidWriteCommand->getPath() . '/stock', // $propertyPath
$invalidWriteCommand->getPayload()['stock'], // $invalidValue
);
$violations->add($violation);
}
$event->addViolation(new WriteConstraintViolationException($violations));
}
public function afterProductWritten(EntityWrittenEvent $event): void
{
if ($event->getContext()->getVersionId() !== Defaults::LIVE_VERSION) {
return;
}
if (!$this->config->isStockInitialized()) {
return;
}
$writeResults = $event->getWriteResults();
$newProductStocks = [];
$existingProductStocks = [];
foreach ($writeResults as $writeResult) {
$payload = $writeResult->getPayload();
// Filter out instances of EntityWriteResult with empty payload. Somehow they are introduced by a bug in
// the Shopware DAL.
if (count($payload) === 0) {
continue;
}
if ($payload['versionId'] !== Defaults::LIVE_VERSION) {
continue;
}
if (!array_key_exists('stock', $payload)) {
continue;
}
$isNewProduct = $writeResult->getExistence() && !$writeResult->getExistence()->exists();
$productId = $payload['id'];
if ($isNewProduct) {
$newProductStocks[$productId] = $payload['stock'];
} else {
$existingProductStocks[$productId] = $payload['stock'];
}
}
if (count($existingProductStocks) > 0) {
$this->totalStockWriter->setTotalStockForProducts(
$existingProductStocks,
StockLocationReference::productTotalStockChange(),
$event->getContext(),
);
}
if (count($newProductStocks) > 0) {
$this->totalStockWriter->setTotalStockForProducts(
$newProductStocks,
StockLocationReference::initialization(),
$event->getContext(),
);
}
}
}

custom/plugins/PickwareErpStarter/src/StockApi/Subscriber/ProductStockSubscriber.php line 56