442 lines
12 KiB
PHP
442 lines
12 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Translation;
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use Symfony\Component\Translation\Loader\LoaderInterface;
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use Symfony\Component\Translation\Exception\NotFoundResourceException;
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use Symfony\Component\Config\ConfigCacheInterface;
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use Symfony\Component\Config\ConfigCacheFactoryInterface;
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use Symfony\Component\Config\ConfigCacheFactory;
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/**
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* Translator.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Translator implements TranslatorInterface, TranslatorBagInterface
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{
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/**
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* @var MessageCatalogueInterface[]
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*/
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protected $catalogues = array();
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/**
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* @var string
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*/
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private $locale;
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/**
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* @var array
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*/
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private $fallbackLocales = array();
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/**
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* @var LoaderInterface[]
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*/
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private $loaders = array();
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/**
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* @var array
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*/
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private $resources = array();
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/**
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* @var MessageSelector
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*/
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private $selector;
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/**
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* @var string
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*/
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private $cacheDir;
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/**
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* @var bool
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*/
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private $debug;
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/**
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* @var ConfigCacheFactoryInterface|null
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*/
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private $configCacheFactory;
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/**
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* Constructor.
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*
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* @param string $locale The locale
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* @param MessageSelector|null $selector The message selector for pluralization
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* @param string|null $cacheDir The directory to use for the cache
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* @param bool $debug Use cache in debug mode ?
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*
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* @throws \InvalidArgumentException If a locale contains invalid characters
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*/
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public function __construct($locale, MessageSelector $selector = null, $cacheDir = null, $debug = false)
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{
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$this->setLocale($locale);
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$this->selector = $selector ?: new MessageSelector();
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$this->cacheDir = $cacheDir;
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$this->debug = $debug;
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}
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/**
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* Sets the ConfigCache factory to use.
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*
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* @param ConfigCacheFactoryInterface $configCacheFactory
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*/
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public function setConfigCacheFactory(ConfigCacheFactoryInterface $configCacheFactory)
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{
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$this->configCacheFactory = $configCacheFactory;
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}
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/**
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* Adds a Loader.
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*
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* @param string $format The name of the loader (@see addResource())
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* @param LoaderInterface $loader A LoaderInterface instance
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*/
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public function addLoader($format, LoaderInterface $loader)
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{
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$this->loaders[$format] = $loader;
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}
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/**
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* Adds a Resource.
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*
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* @param string $format The name of the loader (@see addLoader())
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* @param mixed $resource The resource name
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* @param string $locale The locale
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* @param string $domain The domain
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*
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* @throws \InvalidArgumentException If the locale contains invalid characters
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*/
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public function addResource($format, $resource, $locale, $domain = null)
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{
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if (null === $domain) {
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$domain = 'messages';
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}
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$this->assertValidLocale($locale);
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$this->resources[$locale][] = array($format, $resource, $domain);
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if (in_array($locale, $this->fallbackLocales)) {
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$this->catalogues = array();
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} else {
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unset($this->catalogues[$locale]);
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function setLocale($locale)
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{
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$this->assertValidLocale($locale);
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$this->locale = $locale;
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}
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/**
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* {@inheritdoc}
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*/
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public function getLocale()
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{
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return $this->locale;
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}
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/**
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* Sets the fallback locales.
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*
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* @param array $locales The fallback locales
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*
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* @throws \InvalidArgumentException If a locale contains invalid characters
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*/
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public function setFallbackLocales(array $locales)
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{
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// needed as the fallback locales are linked to the already loaded catalogues
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$this->catalogues = array();
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foreach ($locales as $locale) {
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$this->assertValidLocale($locale);
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}
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$this->fallbackLocales = $locales;
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}
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/**
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* Gets the fallback locales.
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*
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* @return array $locales The fallback locales
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*/
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public function getFallbackLocales()
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{
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return $this->fallbackLocales;
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}
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/**
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* {@inheritdoc}
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*/
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public function trans($id, array $parameters = array(), $domain = null, $locale = null)
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{
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if (null === $domain) {
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$domain = 'messages';
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}
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return strtr($this->getCatalogue($locale)->get((string) $id, $domain), $parameters);
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}
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/**
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* {@inheritdoc}
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*/
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public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
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{
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if (null === $domain) {
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$domain = 'messages';
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}
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$id = (string) $id;
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$catalogue = $this->getCatalogue($locale);
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$locale = $catalogue->getLocale();
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while (!$catalogue->defines($id, $domain)) {
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if ($cat = $catalogue->getFallbackCatalogue()) {
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$catalogue = $cat;
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$locale = $catalogue->getLocale();
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} else {
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break;
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}
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}
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return strtr($this->selector->choose($catalogue->get($id, $domain), (int) $number, $locale), $parameters);
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}
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/**
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* {@inheritdoc}
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*/
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public function getCatalogue($locale = null)
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{
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if (null === $locale) {
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$locale = $this->getLocale();
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} else {
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$this->assertValidLocale($locale);
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}
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if (!isset($this->catalogues[$locale])) {
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$this->loadCatalogue($locale);
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}
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return $this->catalogues[$locale];
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}
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/**
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* Gets the loaders.
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*
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* @return array LoaderInterface[]
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*/
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protected function getLoaders()
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{
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return $this->loaders;
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}
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/**
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* @param string $locale
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*/
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protected function loadCatalogue($locale)
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{
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if (null === $this->cacheDir) {
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$this->initializeCatalogue($locale);
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} else {
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$this->initializeCacheCatalogue($locale);
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}
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}
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/**
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* @param string $locale
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*/
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protected function initializeCatalogue($locale)
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{
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$this->assertValidLocale($locale);
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try {
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$this->doLoadCatalogue($locale);
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} catch (NotFoundResourceException $e) {
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if (!$this->computeFallbackLocales($locale)) {
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throw $e;
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}
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}
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$this->loadFallbackCatalogues($locale);
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}
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/**
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* @param string $locale
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*/
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private function initializeCacheCatalogue($locale)
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{
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if (isset($this->catalogues[$locale])) {
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/* Catalogue already initialized. */
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return;
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}
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$this->assertValidLocale($locale);
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$cache = $this->getConfigCacheFactory()->cache($this->getCatalogueCachePath($locale),
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function (ConfigCacheInterface $cache) use ($locale) {
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$this->dumpCatalogue($locale, $cache);
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}
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);
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if (isset($this->catalogues[$locale])) {
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/* Catalogue has been initialized as it was written out to cache. */
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return;
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}
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/* Read catalogue from cache. */
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$this->catalogues[$locale] = include $cache->getPath();
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}
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private function dumpCatalogue($locale, ConfigCacheInterface $cache)
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{
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$this->initializeCatalogue($locale);
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$fallbackContent = $this->getFallbackContent($this->catalogues[$locale]);
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$content = sprintf(<<<EOF
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<?php
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use Symfony\Component\Translation\MessageCatalogue;
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\$catalogue = new MessageCatalogue('%s', %s);
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%s
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return \$catalogue;
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EOF
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,
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$locale,
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var_export($this->catalogues[$locale]->all(), true),
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$fallbackContent
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);
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$cache->write($content, $this->catalogues[$locale]->getResources());
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}
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private function getFallbackContent(MessageCatalogue $catalogue)
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{
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$fallbackContent = '';
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$current = '';
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$replacementPattern = '/[^a-z0-9_]/i';
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$fallbackCatalogue = $catalogue->getFallbackCatalogue();
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while ($fallbackCatalogue) {
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$fallback = $fallbackCatalogue->getLocale();
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$fallbackSuffix = ucfirst(preg_replace($replacementPattern, '_', $fallback));
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$currentSuffix = ucfirst(preg_replace($replacementPattern, '_', $current));
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$fallbackContent .= sprintf(<<<EOF
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\$catalogue%s = new MessageCatalogue('%s', %s);
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\$catalogue%s->addFallbackCatalogue(\$catalogue%s);
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EOF
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,
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$fallbackSuffix,
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$fallback,
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var_export($fallbackCatalogue->all(), true),
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$currentSuffix,
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$fallbackSuffix
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);
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$current = $fallbackCatalogue->getLocale();
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$fallbackCatalogue = $fallbackCatalogue->getFallbackCatalogue();
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}
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return $fallbackContent;
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}
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private function getCatalogueCachePath($locale)
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{
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return $this->cacheDir.'/catalogue.'.$locale.'.'.sha1(serialize($this->fallbackLocales)).'.php';
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}
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private function doLoadCatalogue($locale)
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{
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$this->catalogues[$locale] = new MessageCatalogue($locale);
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if (isset($this->resources[$locale])) {
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foreach ($this->resources[$locale] as $resource) {
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if (!isset($this->loaders[$resource[0]])) {
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throw new \RuntimeException(sprintf('The "%s" translation loader is not registered.', $resource[0]));
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}
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$this->catalogues[$locale]->addCatalogue($this->loaders[$resource[0]]->load($resource[1], $locale, $resource[2]));
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}
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}
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}
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private function loadFallbackCatalogues($locale)
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{
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$current = $this->catalogues[$locale];
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foreach ($this->computeFallbackLocales($locale) as $fallback) {
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if (!isset($this->catalogues[$fallback])) {
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$this->doLoadCatalogue($fallback);
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}
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$fallbackCatalogue = new MessageCatalogue($fallback, $this->catalogues[$fallback]->all());
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foreach ($this->catalogues[$fallback]->getResources() as $resource) {
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$fallbackCatalogue->addResource($resource);
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}
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$current->addFallbackCatalogue($fallbackCatalogue);
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$current = $fallbackCatalogue;
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}
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}
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protected function computeFallbackLocales($locale)
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{
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$locales = array();
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foreach ($this->fallbackLocales as $fallback) {
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if ($fallback === $locale) {
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continue;
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}
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$locales[] = $fallback;
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}
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if (strrchr($locale, '_') !== false) {
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array_unshift($locales, substr($locale, 0, -strlen(strrchr($locale, '_'))));
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}
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return array_unique($locales);
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}
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/**
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* Asserts that the locale is valid, throws an Exception if not.
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*
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* @param string $locale Locale to tests
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*
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* @throws \InvalidArgumentException If the locale contains invalid characters
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*/
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protected function assertValidLocale($locale)
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{
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if (1 !== preg_match('/^[a-z0-9@_\\.\\-]*$/i', $locale)) {
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throw new \InvalidArgumentException(sprintf('Invalid "%s" locale.', $locale));
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}
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}
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/**
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* Provides the ConfigCache factory implementation, falling back to a
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* default implementation if necessary.
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*
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* @return ConfigCacheFactoryInterface $configCacheFactory
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*/
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private function getConfigCacheFactory()
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{
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if (!$this->configCacheFactory) {
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$this->configCacheFactory = new ConfigCacheFactory($this->debug);
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}
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return $this->configCacheFactory;
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}
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}
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