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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\Config\Definition;
/**
* This class is the entry point for config normalization/merging/finalization.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class Processor
{
/**
* Processes an array of configurations.
*
* @param NodeInterface $configTree The node tree describing the configuration
* @param array $configs An array of configuration items to process
*
* @return array The processed configuration
*/
public function process(NodeInterface $configTree, array $configs)
{
$configs = self::normalizeKeys($configs);
$currentConfig = array();
foreach ($configs as $config) {
$config = $configTree->normalize($config);
$currentConfig = $configTree->merge($currentConfig, $config);
}
return $configTree->finalize($currentConfig);
}
/**
* Processes an array of configurations.
*
* @param ConfigurationInterface $configuration The configuration class
* @param array $configs An array of configuration items to process
*
* @return array The processed configuration
*/
public function processConfiguration(ConfigurationInterface $configuration, array $configs)
{
return $this->process($configuration->getConfigTreeBuilder()->buildTree(), $configs);
}
/**
* This method normalizes keys between the different configuration formats
*
* Namely, you mostly have foo_bar in YAML while you have foo-bar in XML.
* After running this method, all keys are normalized to foo_bar.
*
* If you have a mixed key like foo-bar_moo, it will not be altered.
* The key will also not be altered if the target key already exists.
*
* @param array $config
*
* @return array the config with normalized keys
*/
public static function normalizeKeys(array $config)
{
foreach ($config as $key => $value) {
if (is_array($value)) {
$config[$key] = self::normalizeKeys($value);
}
if (false !== strpos($key, '-') && false === strpos($key, '_') && !array_key_exists($normalizedKey = str_replace('-', '_', $key), $config)) {
$config[$normalizedKey] = $config[$key];
unset($config[$key]);
}
}
return $config;
}
/**
* Normalizes a configuration entry.
*
* This method returns a normalize configuration array for a given key
* to remove the differences due to the original format (YAML and XML mainly).
*
* Here is an example.
*
* The configuration is XML:
*
* <twig:extension id="twig.extension.foo" />
* <twig:extension id="twig.extension.bar" />
*
* And the same configuration in YAML:
*
* twig.extensions: ['twig.extension.foo', 'twig.extension.bar']
*
* @param array $config A config array
* @param string $key The key to normalize
* @param string $plural The plural form of the key if it is irregular
*
* @return array
*/
public static function normalizeConfig($config, $key, $plural = null)
{
if (null === $plural) {
$plural = $key.'s';
}
$values = array();
if (isset($config[$plural])) {
$values = $config[$plural];
} elseif (isset($config[$key])) {
if (is_string($config[$key]) || !is_int(key($config[$key]))) {
// only one
$values = array($config[$key]);
} else {
$values = $config[$key];
}
}
return $values;
}
}
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