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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\Intl\ResourceBundle\Reader;
use Symfony\Component\Intl\ResourceBundle\Util\RecursiveArrayAccess;
/**
* A structured reader wrapping an existing resource bundle reader.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*
* @see StructuredResourceBundleBundleReaderInterface
*/
class StructuredBundleReader implements StructuredBundleReaderInterface
{
/**
* @var BundleReaderInterface
*/
private $reader;
/**
* Creates an entry reader based on the given resource bundle reader.
*
* @param BundleReaderInterface $reader A resource bundle reader to use.
*/
public function __construct(BundleReaderInterface $reader)
{
$this->reader = $reader;
}
/**
* {@inheritdoc}
*/
public function read($path, $locale)
{
return $this->reader->read($path, $locale);
}
/**
* {@inheritdoc}
*/
public function getLocales($path)
{
return $this->reader->getLocales($path);
}
/**
* {@inheritdoc}
*/
public function readEntry($path, $locale, array $indices, $fallback = true)
{
$data = $this->reader->read($path, $locale);
$entry = RecursiveArrayAccess::get($data, $indices);
$multivalued = is_array($entry) || $entry instanceof \Traversable;
if (!($fallback && (null === $entry || $multivalued))) {
return $entry;
}
if (null !== ($fallbackLocale = $this->getFallbackLocale($locale))) {
$parentEntry = $this->readEntry($path, $fallbackLocale, $indices, true);
if ($entry || $parentEntry) {
$multivalued = $multivalued || is_array($parentEntry) || $parentEntry instanceof \Traversable;
if ($multivalued) {
if ($entry instanceof \Traversable) {
$entry = iterator_to_array($entry);
}
if ($parentEntry instanceof \Traversable) {
$parentEntry = iterator_to_array($parentEntry);
}
$entry = array_merge(
$parentEntry ?: array(),
$entry ?: array()
);
} else {
$entry = null === $entry ? $parentEntry : $entry;
}
}
}
return $entry;
}
/**
* Returns the fallback locale for a given locale, if any
*
* @param string $locale The locale to find the fallback for.
*
* @return string|null The fallback locale, or null if no parent exists
*/
private function getFallbackLocale($locale)
{
if (false === $pos = strrpos($locale, '_')) {
return null;
}
return substr($locale, 0, $pos);
}
}
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