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\Bridge\Doctrine;
use Doctrine\Common\EventArgs;
use Doctrine\Common\EventManager;
use Doctrine\Common\EventSubscriber;
use Psr\Container\ContainerInterface;
/**
* Allows lazy loading of listener and subscriber services.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class ContainerAwareEventManager extends EventManager
{
/**
* Map of registered listeners.
*
* <event> => <listeners>
*/
private $listeners = [];
private $subscribers;
private $initialized = [];
private $initializedSubscribers = false;
private $initializedHashMapping = [];
private $methods = [];
private $container;
/**
* @param list<string|EventSubscriber|array{string[], string|object}> $subscriberIds List of subscribers, subscriber ids, or [events, listener] tuples
*/
public function __construct(ContainerInterface $container, array $subscriberIds = [])
{
$this->container = $container;
$this->subscribers = $subscriberIds;
}
/**
* {@inheritdoc}
*
* @return void
*/
public function dispatchEvent($eventName, ?EventArgs $eventArgs = null)
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
if (!isset($this->listeners[$eventName])) {
return;
}
$eventArgs = $eventArgs ?? EventArgs::getEmptyInstance();
if (!isset($this->initialized[$eventName])) {
$this->initializeListeners($eventName);
}
foreach ($this->listeners[$eventName] as $hash => $listener) {
$listener->{$this->methods[$eventName][$hash]}($eventArgs);
}
}
/**
* {@inheritdoc}
*
* @return object[][]
*/
public function getListeners($event = null)
{
if (null === $event) {
return $this->getAllListeners();
}
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
if (!isset($this->initialized[$event])) {
$this->initializeListeners($event);
}
return $this->listeners[$event];
}
public function getAllListeners(): array
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
foreach ($this->listeners as $event => $listeners) {
if (!isset($this->initialized[$event])) {
$this->initializeListeners($event);
}
}
return $this->listeners;
}
/**
* {@inheritdoc}
*
* @return bool
*/
public function hasListeners($event)
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
return isset($this->listeners[$event]) && $this->listeners[$event];
}
/**
* {@inheritdoc}
*
* @return void
*/
public function addEventListener($events, $listener)
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
$hash = $this->getHash($listener);
foreach ((array) $events as $event) {
// Overrides listener if a previous one was associated already
// Prevents duplicate listeners on same event (same instance only)
$this->listeners[$event][$hash] = $listener;
if (\is_string($listener)) {
unset($this->initialized[$event]);
unset($this->initializedHashMapping[$event][$hash]);
} else {
$this->methods[$event][$hash] = $this->getMethod($listener, $event);
}
}
}
/**
* {@inheritdoc}
*
* @return void
*/
public function removeEventListener($events, $listener)
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
$hash = $this->getHash($listener);
foreach ((array) $events as $event) {
if (isset($this->initializedHashMapping[$event][$hash])) {
$hash = $this->initializedHashMapping[$event][$hash];
unset($this->initializedHashMapping[$event][$hash]);
}
// Check if we actually have this listener associated
if (isset($this->listeners[$event][$hash])) {
unset($this->listeners[$event][$hash]);
}
if (isset($this->methods[$event][$hash])) {
unset($this->methods[$event][$hash]);
}
}
}
public function addEventSubscriber(EventSubscriber $subscriber): void
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
parent::addEventSubscriber($subscriber);
}
public function removeEventSubscriber(EventSubscriber $subscriber): void
{
if (!$this->initializedSubscribers) {
$this->initializeSubscribers();
}
parent::removeEventSubscriber($subscriber);
}
private function initializeListeners(string $eventName)
{
$this->initialized[$eventName] = true;
// We'll refill the whole array in order to keep the same order
$listeners = [];
foreach ($this->listeners[$eventName] as $hash => $listener) {
if (\is_string($listener)) {
$listener = $this->container->get($listener);
$newHash = $this->getHash($listener);
$this->initializedHashMapping[$eventName][$hash] = $newHash;
$listeners[$newHash] = $listener;
$this->methods[$eventName][$newHash] = $this->getMethod($listener, $eventName);
} else {
$listeners[$hash] = $listener;
}
}
$this->listeners[$eventName] = $listeners;
}
private function initializeSubscribers()
{
$this->initializedSubscribers = true;
foreach ($this->subscribers as $subscriber) {
if (\is_array($subscriber)) {
$this->addEventListener(...$subscriber);
continue;
}
if (\is_string($subscriber)) {
$subscriber = $this->container->get($subscriber);
}
parent::addEventSubscriber($subscriber);
}
$this->subscribers = [];
}
/**
* @param string|object $listener
*/
private function getHash($listener): string
{
if (\is_string($listener)) {
return '_service_'.$listener;
}
return spl_object_hash($listener);
}
private function getMethod(object $listener, string $event): string
{
if (!method_exists($listener, $event) && method_exists($listener, '__invoke')) {
return '__invoke';
}
return $event;
}
}

vendor/symfony/doctrine-bridge/ContainerAwareEventManager.php line 221