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<?php
/**
* @file
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* Contains \Drupal\serialization\RegisterSerializationClassesCompilerPass.
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*/
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namespace Drupal\serialization;
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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.
*/
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class RegisterSerializationClassesCompilerPass implements CompilerPassInterface {
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/**
* Adds services to the Serializer.
*
* @param \Symfony\Component\DependencyInjection\ContainerBuilder $container
* The container to process.
*/
public function process(ContainerBuilder $container) {
$definition = $container->getDefinition('serializer');
// Retrieve registered Normalizers and Encoders from the container.
foreach ($container->findTaggedServiceIds('normalizer') as $id => $attributes) {
$priority = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
$normalizers[$priority][] = new Reference($id);
}
foreach ($container->findTaggedServiceIds('encoder') as $id => $attributes) {
$priority = isset($attributes[0]['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.
$formats = array();
foreach ($container->findTaggedServiceIds('encoder') as $id => $attributes) {
foreach ($attributes[0]['format'] as $name => $label) {
$formats[$name] = $label;
}
}
$container->setParameter('serializer.formats', $formats);
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}
/**
* 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) {
$sorted = array();
krsort($services);
// Flatten the array.
foreach ($services as $a) {
$sorted = array_merge($sorted, $a);
}
return $sorted;
}
}