Symfony Profiler

<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\EventDispatcher\DependencyInjection;
use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Contracts\EventDispatcher\Event;
/**
* Compiler pass to register tagged services for an event dispatcher.
*/
class RegisterListenersPass implements CompilerPassInterface
{
protected $dispatcherService;
protected $listenerTag;
protected $subscriberTag;
protected $eventAliasesParameter;
private $hotPathEvents = [];
private $hotPathTagName = 'container.hot_path';
private $noPreloadEvents = [];
private $noPreloadTagName = 'container.no_preload';
public function __construct(string $dispatcherService = 'event_dispatcher', string $listenerTag = 'kernel.event_listener', string $subscriberTag = 'kernel.event_subscriber', string $eventAliasesParameter = 'event_dispatcher.event_aliases')
{
if (0 < \func_num_args()) {
trigger_deprecation('symfony/event-dispatcher', '5.3', 'Configuring "%s" is deprecated.', __CLASS__);
}
$this->dispatcherService = $dispatcherService;
$this->listenerTag = $listenerTag;
$this->subscriberTag = $subscriberTag;
$this->eventAliasesParameter = $eventAliasesParameter;
}
/**
* @return $this
*/
public function setHotPathEvents(array $hotPathEvents)
{
$this->hotPathEvents = array_flip($hotPathEvents);
if (1 < \func_num_args()) {
trigger_deprecation('symfony/event-dispatcher', '5.4', 'Configuring "$tagName" in "%s" is deprecated.', __METHOD__);
$this->hotPathTagName = func_get_arg(1);
}
return $this;
}
/**
* @return $this
*/
public function setNoPreloadEvents(array $noPreloadEvents): self
{
$this->noPreloadEvents = array_flip($noPreloadEvents);
if (1 < \func_num_args()) {
trigger_deprecation('symfony/event-dispatcher', '5.4', 'Configuring "$tagName" in "%s" is deprecated.', __METHOD__);
$this->noPreloadTagName = func_get_arg(1);
}
return $this;
}
public function process(ContainerBuilder $container)
{
if (!$container->hasDefinition($this->dispatcherService) && !$container->hasAlias($this->dispatcherService)) {
return;
}
$aliases = [];
if ($container->hasParameter($this->eventAliasesParameter)) {
$aliases = $container->getParameter($this->eventAliasesParameter);
}
$globalDispatcherDefinition = $container->findDefinition($this->dispatcherService);
foreach ($container->findTaggedServiceIds($this->listenerTag, true) as $id => $events) {
$noPreload = 0;
foreach ($events as $event) {
$priority = $event['priority'] ?? 0;
if (!isset($event['event'])) {
if ($container->getDefinition($id)->hasTag($this->subscriberTag)) {
continue;
}
$event['method'] = $event['method'] ?? '__invoke';
$event['event'] = $this->getEventFromTypeDeclaration($container, $id, $event['method']);
}
$event['event'] = $aliases[$event['event']] ?? $event['event'];
if (!isset($event['method'])) {
$event['method'] = 'on'.preg_replace_callback([
'/(?<=\b|_)[a-z]/i',
'/[^a-z0-9]/i',
], function ($matches) { return strtoupper($matches[0]); }, $event['event']);
$event['method'] = preg_replace('/[^a-z0-9]/i', '', $event['method']);
if (null !== ($class = $container->getDefinition($id)->getClass()) && ($r = $container->getReflectionClass($class, false)) && !$r->hasMethod($event['method']) && $r->hasMethod('__invoke')) {
$event['method'] = '__invoke';
}
}
$dispatcherDefinition = $globalDispatcherDefinition;
if (isset($event['dispatcher'])) {
$dispatcherDefinition = $container->getDefinition($event['dispatcher']);
}
$dispatcherDefinition->addMethodCall('addListener', [$event['event'], [new ServiceClosureArgument(new Reference($id)), $event['method']], $priority]);
if (isset($this->hotPathEvents[$event['event']])) {
$container->getDefinition($id)->addTag($this->hotPathTagName);
} elseif (isset($this->noPreloadEvents[$event['event']])) {
++$noPreload;
}
}
if ($noPreload && \count($events) === $noPreload) {
$container->getDefinition($id)->addTag($this->noPreloadTagName);
}
}
$extractingDispatcher = new ExtractingEventDispatcher();
foreach ($container->findTaggedServiceIds($this->subscriberTag, true) as $id => $tags) {
$def = $container->getDefinition($id);
// We must assume that the class value has been correctly filled, even if the service is created by a factory
$class = $def->getClass();
if (!$r = $container->getReflectionClass($class)) {
throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
}
if (!$r->isSubclassOf(EventSubscriberInterface::class)) {
throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, EventSubscriberInterface::class));
}
$class = $r->name;
$dispatcherDefinitions = [];
foreach ($tags as $attributes) {
if (!isset($attributes['dispatcher']) || isset($dispatcherDefinitions[$attributes['dispatcher']])) {
continue;
}
$dispatcherDefinitions[$attributes['dispatcher']] = $container->getDefinition($attributes['dispatcher']);
}
if (!$dispatcherDefinitions) {
$dispatcherDefinitions = [$globalDispatcherDefinition];
}
$noPreload = 0;
ExtractingEventDispatcher::$aliases = $aliases;
ExtractingEventDispatcher::$subscriber = $class;
$extractingDispatcher->addSubscriber($extractingDispatcher);
foreach ($extractingDispatcher->listeners as $args) {
$args[1] = [new ServiceClosureArgument(new Reference($id)), $args[1]];
foreach ($dispatcherDefinitions as $dispatcherDefinition) {
$dispatcherDefinition->addMethodCall('addListener', $args);
}
if (isset($this->hotPathEvents[$args[0]])) {
$container->getDefinition($id)->addTag($this->hotPathTagName);
} elseif (isset($this->noPreloadEvents[$args[0]])) {
++$noPreload;
}
}
if ($noPreload && \count($extractingDispatcher->listeners) === $noPreload) {
$container->getDefinition($id)->addTag($this->noPreloadTagName);
}
$extractingDispatcher->listeners = [];
ExtractingEventDispatcher::$aliases = [];
}
}
private function getEventFromTypeDeclaration(ContainerBuilder $container, string $id, string $method): string
{
if (
null === ($class = $container->getDefinition($id)->getClass())
|| !($r = $container->getReflectionClass($class, false))
|| !$r->hasMethod($method)
|| 1 > ($m = $r->getMethod($method))->getNumberOfParameters()
|| !($type = $m->getParameters()[0]->getType()) instanceof \ReflectionNamedType
|| $type->isBuiltin()
|| Event::class === ($name = $type->getName())
) {
throw new InvalidArgumentException(sprintf('Service "%s" must define the "event" attribute on "%s" tags.', $id, $this->listenerTag));
}
return $name;
}
}
/**
* @internal
*/
class ExtractingEventDispatcher extends EventDispatcher implements EventSubscriberInterface
{
public $listeners = [];
public static $aliases = [];
public static $subscriber;
public function addListener(string $eventName, $listener, int $priority = 0)
{
$this->listeners[] = [$eventName, $listener[1], $priority];
}
public static function getSubscribedEvents(): array
{
$events = [];
foreach ([self::$subscriber, 'getSubscribedEvents']() as $eventName => $params) {
$events[self::$aliases[$eventName] ?? $eventName] = $params;
}
return $events;
}
}

vendor/symfony/event-dispatcher/DependencyInjection/RegisterListenersPass.php line 232