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<?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\DependencyInjection\Extension;
use Symfony\Component\Config\Definition\ConfigurationInterface;
use Symfony\Component\Config\Definition\Processor;
use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\BadMethodCallException;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
use Symfony\Component\DependencyInjection\Exception\LogicException;
/**
* Provides useful features shared by many extensions.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
abstract class Extension implements ExtensionInterface, ConfigurationExtensionInterface
{
private array $processedConfigs = [];
/**
* @return string|false
*/
public function getXsdValidationBasePath()
{
return false;
}
/**
* @return string
*/
public function getNamespace()
{
return 'http://example.org/schema/dic/'.$this->getAlias();
}
/**
* Returns the recommended alias to use in XML.
*
* This alias is also the mandatory prefix to use when using YAML.
*
* This convention is to remove the "Extension" postfix from the class
* name and then lowercase and underscore the result. So:
*
* AcmeHelloExtension
*
* becomes
*
* acme_hello
*
* This can be overridden in a sub-class to specify the alias manually.
*
* @throws BadMethodCallException When the extension name does not follow conventions
*/
public function getAlias(): string
{
$className = static::class;
if (!str_ends_with($className, 'Extension')) {
throw new BadMethodCallException('This extension does not follow the naming convention; you must overwrite the getAlias() method.');
}
$classBaseName = substr(strrchr($className, '\\'), 1, -9);
return Container::underscore($classBaseName);
}
/**
* @return ConfigurationInterface|null
*/
public function getConfiguration(array $config, ContainerBuilder $container)
{
$class = static::class;
if (str_contains($class, "\0")) {
return null; // ignore anonymous classes
}
$class = substr_replace($class, '\Configuration', strrpos($class, '\\'));
$class = $container->getReflectionClass($class);
if (!$class) {
return null;
}
if (!$class->implementsInterface(ConfigurationInterface::class)) {
throw new LogicException(sprintf('The extension configuration class "%s" must implement "%s".', $class->getName(), ConfigurationInterface::class));
}
if (!($constructor = $class->getConstructor()) || !$constructor->getNumberOfRequiredParameters()) {
return $class->newInstance();
}
return null;
}
final protected function processConfiguration(ConfigurationInterface $configuration, array $configs): array
{
$processor = new Processor();
return $this->processedConfigs[] = $processor->processConfiguration($configuration, $configs);
}
/**
* @internal
*/
final public function getProcessedConfigs(): array
{
try {
return $this->processedConfigs;
} finally {
$this->processedConfigs = [];
}
}
/**
* @throws InvalidArgumentException When the config is not enableable
*/
protected function isConfigEnabled(ContainerBuilder $container, array $config): bool
{
if (!\array_key_exists('enabled', $config)) {
throw new InvalidArgumentException("The config array has no 'enabled' key.");
}
return (bool) $container->getParameterBag()->resolveValue($config['enabled']);
}
}
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