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<?php
namespace Drupal\serialization;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
/**
* Adds services tagged 'normalizer' and 'encoder' to the Serializer.
*/
class RegisterSerializationClassesCompilerPass implements CompilerPassInterface {
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container): void {
$definition = $container->getDefinition('serializer');
// Retrieve registered Normalizers and Encoders from the container.
foreach ($container->findTaggedServiceIds('normalizer') as $id => $attributes) {
// The 'serializer' service is the public API: mark normalizers private.
$container->getDefinition($id)->setPublic(FALSE);
$priority = $attributes[0]['priority'] ?? 0;
$normalizers[$priority][] = new Reference($id);
}
foreach ($container->findTaggedServiceIds('encoder') as $id => $attributes) {
// The 'serializer' service is the public API: mark encoders private.
$container->getDefinition($id)->setPublic(FALSE);
$priority = $attributes[0]['priority'] ?? 0;
$encoders[$priority][] = new Reference($id);
}
// Add the registered Normalizers and Encoders to the Serializer.
if (!empty($normalizers)) {
$definition->replaceArgument(0, $this->sort($normalizers));
}
if (!empty($encoders)) {
$definition->replaceArgument(1, $this->sort($encoders));
}
// Find all serialization formats known.
$formats = [];
$format_providers = [];
foreach ($container->findTaggedServiceIds('encoder') as $service_id => $attributes) {
$format = $attributes[0]['format'];
$formats[] = $format;
if ($provider_tag = $container->getDefinition($service_id)->getTag('_provider')) {
$format_providers[$format] = $provider_tag[0]['provider'];
}
}
$container->setParameter('serializer.formats', $formats);
$container->setParameter('serializer.format_providers', $format_providers);
}
/**
* Sorts by priority.
*
* Order services from highest priority number to lowest (reverse sorting).
*
* @param array $services
* A nested array keyed on priority number. For each priority number, the
* value is an array of Symfony\Component\DependencyInjection\Reference
* objects, each a reference to a normalizer or encoder service.
*
* @return array
* A flattened array of Reference objects from $services, ordered from high
* to low priority.
*/
protected function sort($services) {
krsort($services);
return array_merge(...$services);
}
}
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