Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\DependencyInjection\Extension;
Chris@0: 
Chris@0: use Symfony\Component\DependencyInjection\Container;
Chris@0: use Symfony\Component\DependencyInjection\Exception\BadMethodCallException;
Chris@0: use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
Chris@0: use Symfony\Component\Config\Resource\FileResource;
Chris@0: use Symfony\Component\DependencyInjection\ContainerBuilder;
Chris@0: use Symfony\Component\Config\Definition\Processor;
Chris@0: use Symfony\Component\Config\Definition\ConfigurationInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides useful features shared by many extensions.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: abstract class Extension implements ExtensionInterface, ConfigurationExtensionInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getXsdValidationBasePath()
Chris@0:     {
Chris@0:         return false;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getNamespace()
Chris@0:     {
Chris@0:         return 'http://example.org/schema/dic/'.$this->getAlias();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns the recommended alias to use in XML.
Chris@0:      *
Chris@0:      * This alias is also the mandatory prefix to use when using YAML.
Chris@0:      *
Chris@0:      * This convention is to remove the "Extension" postfix from the class
Chris@0:      * name and then lowercase and underscore the result. So:
Chris@0:      *
Chris@0:      *     AcmeHelloExtension
Chris@0:      *
Chris@0:      * becomes
Chris@0:      *
Chris@0:      *     acme_hello
Chris@0:      *
Chris@0:      * This can be overridden in a sub-class to specify the alias manually.
Chris@0:      *
Chris@0:      * @return string The alias
Chris@0:      *
Chris@0:      * @throws BadMethodCallException When the extension name does not follow conventions
Chris@0:      */
Chris@0:     public function getAlias()
Chris@0:     {
Chris@0:         $className = get_class($this);
Chris@0:         if (substr($className, -9) != 'Extension') {
Chris@0:             throw new BadMethodCallException('This extension does not follow the naming convention; you must overwrite the getAlias() method.');
Chris@0:         }
Chris@0:         $classBaseName = substr(strrchr($className, '\\'), 1, -9);
Chris@0: 
Chris@0:         return Container::underscore($classBaseName);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getConfiguration(array $config, ContainerBuilder $container)
Chris@0:     {
Chris@0:         $reflected = new \ReflectionClass($this);
Chris@0:         $namespace = $reflected->getNamespaceName();
Chris@0: 
Chris@0:         $class = $namespace.'\\Configuration';
Chris@0:         if (class_exists($class)) {
Chris@0:             $r = new \ReflectionClass($class);
Chris@0:             $container->addResource(new FileResource($r->getFileName()));
Chris@0: 
Chris@0:             if (!method_exists($class, '__construct')) {
Chris@0:                 return new $class();
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     final protected function processConfiguration(ConfigurationInterface $configuration, array $configs)
Chris@0:     {
Chris@0:         $processor = new Processor();
Chris@0: 
Chris@0:         return $processor->processConfiguration($configuration, $configs);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @param ContainerBuilder $container
Chris@0:      * @param array            $config
Chris@0:      *
Chris@0:      * @return bool Whether the configuration is enabled
Chris@0:      *
Chris@0:      * @throws InvalidArgumentException When the config is not enableable
Chris@0:      */
Chris@0:     protected function isConfigEnabled(ContainerBuilder $container, array $config)
Chris@0:     {
Chris@0:         if (!array_key_exists('enabled', $config)) {
Chris@0:             throw new InvalidArgumentException("The config array has no 'enabled' key.");
Chris@0:         }
Chris@0: 
Chris@0:         return (bool) $container->getParameterBag()->resolveValue($config['enabled']);
Chris@0:     }
Chris@0: }