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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\Translation;
use Symfony\Component\Translation\Loader\LoaderInterface;
use Symfony\Component\Translation\Exception\NotFoundResourceException;
/**
* Translator.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @api
*/
class Translator implements TranslatorInterface
{
/**
* @var MessageCatalogueInterface[]
*/
protected $catalogues = array();
/**
* @var string
*/
protected $locale;
/**
* @var array
*/
private $fallbackLocales = array();
/**
* @var LoaderInterface[]
*/
private $loaders = array();
/**
* @var array
*/
private $resources = array();
/**
* @var MessageSelector
*/
private $selector;
/**
* Constructor.
*
* @param string $locale The locale
* @param MessageSelector|null $selector The message selector for pluralization
*
* @api
*/
public function __construct($locale, MessageSelector $selector = null)
{
$this->locale = $locale;
$this->selector = $selector ?: new MessageSelector();
}
/**
* Adds a Loader.
*
* @param string $format The name of the loader (@see addResource())
* @param LoaderInterface $loader A LoaderInterface instance
*
* @api
*/
public function addLoader($format, LoaderInterface $loader)
{
$this->loaders[$format] = $loader;
}
/**
* Adds a Resource.
*
* @param string $format The name of the loader (@see addLoader())
* @param mixed $resource The resource name
* @param string $locale The locale
* @param string $domain The domain
*
* @api
*/
public function addResource($format, $resource, $locale, $domain = null)
{
if (null === $domain) {
$domain = 'messages';
}
$this->resources[$locale][] = array($format, $resource, $domain);
if (in_array($locale, $this->fallbackLocales)) {
$this->catalogues = array();
} else {
unset($this->catalogues[$locale]);
}
}
/**
* {@inheritdoc}
*
* @api
*/
public function setLocale($locale)
{
$this->locale = $locale;
}
/**
* {@inheritdoc}
*
* @api
*/
public function getLocale()
{
return $this->locale;
}
/**
* Sets the fallback locale(s).
*
* @param string|array $locales The fallback locale(s)
*
* @deprecated since 2.3, to be removed in 3.0. Use setFallbackLocales() instead.
*
* @api
*/
public function setFallbackLocale($locales)
{
$this->setFallbackLocales(is_array($locales) ? $locales : array($locales));
}
/**
* Sets the fallback locales.
*
* @param array $locales The fallback locales
*
* @api
*/
public function setFallbackLocales(array $locales)
{
// needed as the fallback locales are linked to the already loaded catalogues
$this->catalogues = array();
$this->fallbackLocales = $locales;
}
/**
* Gets the fallback locales.
*
* @return array $locales The fallback locales
*
* @api
*/
public function getFallbackLocales()
{
return $this->fallbackLocales;
}
/**
* {@inheritdoc}
*
* @api
*/
public function trans($id, array $parameters = array(), $domain = null, $locale = null)
{
if (null === $locale) {
$locale = $this->getLocale();
}
if (null === $domain) {
$domain = 'messages';
}
if (!isset($this->catalogues[$locale])) {
$this->loadCatalogue($locale);
}
return strtr($this->catalogues[$locale]->get((string) $id, $domain), $parameters);
}
/**
* {@inheritdoc}
*
* @api
*/
public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
{
if (null === $locale) {
$locale = $this->getLocale();
}
if (null === $domain) {
$domain = 'messages';
}
if (!isset($this->catalogues[$locale])) {
$this->loadCatalogue($locale);
}
$id = (string) $id;
$catalogue = $this->catalogues[$locale];
while (!$catalogue->defines($id, $domain)) {
if ($cat = $catalogue->getFallbackCatalogue()) {
$catalogue = $cat;
$locale = $catalogue->getLocale();
} else {
break;
}
}
return strtr($this->selector->choose($catalogue->get($id, $domain), (int) $number, $locale), $parameters);
}
/**
* Gets the loaders.
*
* @return array LoaderInterface[]
*/
protected function getLoaders()
{
return $this->loaders;
}
protected function loadCatalogue($locale)
{
try {
$this->doLoadCatalogue($locale);
} catch (NotFoundResourceException $e) {
if (!$this->computeFallbackLocales($locale)) {
throw $e;
}
}
$this->loadFallbackCatalogues($locale);
}
private function doLoadCatalogue($locale)
{
$this->catalogues[$locale] = new MessageCatalogue($locale);
if (isset($this->resources[$locale])) {
foreach ($this->resources[$locale] as $resource) {
if (!isset($this->loaders[$resource[0]])) {
throw new \RuntimeException(sprintf('The "%s" translation loader is not registered.', $resource[0]));
}
$this->catalogues[$locale]->addCatalogue($this->loaders[$resource[0]]->load($resource[1], $locale, $resource[2]));
}
}
}
private function loadFallbackCatalogues($locale)
{
$current = $this->catalogues[$locale];
foreach ($this->computeFallbackLocales($locale) as $fallback) {
if (!isset($this->catalogues[$fallback])) {
$this->doLoadCatalogue($fallback);
}
$current->addFallbackCatalogue($this->catalogues[$fallback]);
$current = $this->catalogues[$fallback];
}
}
protected function computeFallbackLocales($locale)
{
$locales = array();
foreach ($this->fallbackLocales as $fallback) {
if ($fallback === $locale) {
continue;
}
$locales[] = $fallback;
}
if (strrchr($locale, '_') !== false) {
array_unshift($locales, substr($locale, 0, -strlen(strrchr($locale, '_'))));
}
return array_unique($locales);
}
}
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