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RegisterServiceSubscribersPass.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\DependencyInjection\Compiler;
013
014 use Symfony\Component\DependencyInjection\ContainerInterface;
015 use Symfony\Component\DependencyInjection\Definition;
016 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
017 use Symfony\Component\DependencyInjection\Reference;
018 use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
019 use Symfony\Component\DependencyInjection\TypedReference;
020
021 /**
022 * Compiler pass to register tagged services that require a service locator.
023 *
024 * @author Nicolas Grekas <p@tchwork.com>
025 */
026 class RegisterServiceSubscribersPass extends AbstractRecursivePass
027 {
028 protected function processValue($value, $isRoot = false)
029 {
030 if (!$value instanceof Definition || $value->isAbstract() || $value->isSynthetic() || !$value->hasTag('container.service_subscriber')) {
031 return parent::processValue($value, $isRoot);
032 }
033
034 $serviceMap = [];
035 $autowire = $value->isAutowired();
036
037 foreach ($value->getTag('container.service_subscriber') as $attributes) {
038 if (!$attributes) {
039 $autowire = true;
040 continue;
041 }
042 ksort($attributes);
043 if ([] !== array_diff(array_keys($attributes), ['id', 'key'])) {
044 throw new InvalidArgumentException(sprintf('The "container.service_subscriber" tag accepts only the "key" and "id" attributes, "%s" given for service "%s".', implode('", "', array_keys($attributes)), $this->currentId));
045 }
046 if (!\array_key_exists('id', $attributes)) {
047 throw new InvalidArgumentException(sprintf('Missing "id" attribute on "container.service_subscriber" tag with key="%s" for service "%s".', $attributes['key'], $this->currentId));
048 }
049 if (!\array_key_exists('key', $attributes)) {
050 $attributes['key'] = $attributes['id'];
051 }
052 if (isset($serviceMap[$attributes['key']])) {
053 continue;
054 }
055 $serviceMap[$attributes['key']] = new Reference($attributes['id']);
056 }
057 $class = $value->getClass();
058
059 if (!$r = $this->container->getReflectionClass($class)) {
060 throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $this->currentId));
061 }
062 if (!$r->isSubclassOf(ServiceSubscriberInterface::class)) {
063 throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $this->currentId, ServiceSubscriberInterface::class));
064 }
065 $class = $r->name;
066
067 $subscriberMap = [];
068 $declaringClass = (new \ReflectionMethod($class, 'getSubscribedServices'))->class;
069
070 foreach ($class::getSubscribedServices() as $key => $type) {
071 if (!\is_string($type) || !preg_match('/^\??[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+$/', $type)) {
072 throw new InvalidArgumentException(sprintf('"%s::getSubscribedServices()" must return valid PHP types for service "%s" key "%s", "%s" returned.', $class, $this->currentId, $key, \is_string($type) ? $type : \gettype($type)));
073 }
074 if ($optionalBehavior = '?' === $type[0]) {
075 $type = substr($type, 1);
076 $optionalBehavior = ContainerInterface::IGNORE_ON_INVALID_REFERENCE;
077 }
078 if (\is_int($key)) {
079 $key = $type;
080 }
081 if (!isset($serviceMap[$key])) {
082 if (!$autowire) {
083 throw new InvalidArgumentException(sprintf('Service "%s" misses a "container.service_subscriber" tag with "key"/"id" attributes corresponding to entry "%s" as returned by "%s::getSubscribedServices()".', $this->currentId, $key, $class));
084 }
085 $serviceMap[$key] = new Reference($type);
086 }
087
088 $subscriberMap[$key] = new TypedReference($this->container->normalizeId($serviceMap[$key]), $type, $declaringClass, $optionalBehavior ?: ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE);
089 unset($serviceMap[$key]);
090 }
091
092 if ($serviceMap = array_keys($serviceMap)) {
093 $message = sprintf(1 < \count($serviceMap) ? 'keys "%s" do' : 'key "%s" does', str_replace('%', '%%', implode('", "', $serviceMap)));
094 throw new InvalidArgumentException(sprintf('Service %s not exist in the map returned by "%s::getSubscribedServices()" for service "%s".', $message, $class, $this->currentId));
095 }
096
097 $value->addTag('container.service_subscriber.locator', ['id' => (string) ServiceLocatorTagPass::register($this->container, $subscriberMap, $this->currentId)]);
098
099 return parent::processValue($value);
100 }
101 }
102