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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\Config\ConfigCacheFactory;
use Symfony\Component\Config\ConfigCacheFactoryInterface;
use Symfony\Component\Config\ConfigCacheInterface;
use Symfony\Component\Translation\Exception\InvalidArgumentException;
use Symfony\Component\Translation\Exception\LogicException;
use Symfony\Component\Translation\Exception\NotFoundResourceException;
use Symfony\Component\Translation\Exception\RuntimeException;
use Symfony\Component\Translation\Formatter\ChoiceMessageFormatterInterface;
use Symfony\Component\Translation\Formatter\MessageFormatter;
use Symfony\Component\Translation\Formatter\MessageFormatterInterface;
use Symfony\Component\Translation\Loader\LoaderInterface;
/**
* @author Fabien Potencier <fabien@symfony.com>
*/
class Translator implements TranslatorInterface, TranslatorBagInterface
{
/**
* @var MessageCatalogueInterface[]
*/
protected $catalogues = array();
/**
* @var string
*/
private $locale;
/**
* @var array
*/
private $fallbackLocales = array();
/**
* @var LoaderInterface[]
*/
private $loaders = array();
/**
* @var array
*/
private $resources = array();
/**
* @var MessageFormatterInterface
*/
private $formatter;
/**
* @var string
*/
private $cacheDir;
/**
* @var bool
*/
private $debug;
/**
* @var ConfigCacheFactoryInterface|null
*/
private $configCacheFactory;
/**
* @throws InvalidArgumentException If a locale contains invalid characters
*/
public function __construct(?string $locale, MessageFormatterInterface $formatter = null, string $cacheDir = null, bool $debug = false)
{
$this->setLocale($locale);
if (null === $formatter) {
$formatter = new MessageFormatter();
}
$this->formatter = $formatter;
$this->cacheDir = $cacheDir;
$this->debug = $debug;
}
public function setConfigCacheFactory(ConfigCacheFactoryInterface $configCacheFactory)
{
$this->configCacheFactory = $configCacheFactory;
}
/**
* Adds a Loader.
*
* @param string $format The name of the loader (@see addResource())
* @param LoaderInterface $loader A LoaderInterface instance
*/
public function addLoader($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 $domain The domain
*
* @throws InvalidArgumentException If the locale contains invalid characters
*/
public function addResource($format, $resource, $locale, $domain = null)
{
if (null === $domain) {
$domain = 'messages';
}
$this->assertValidLocale($locale);
$this->resources[$locale][] = array($format, $resource, $domain);
if (\in_array($locale, $this->fallbackLocales)) {
$this->catalogues = array();
} else {
unset($this->catalogues[$locale]);
}
}
/**
* {@inheritdoc}
*/
public function setLocale($locale)
{
$this->assertValidLocale($locale);
$this->locale = $locale;
}
/**
* {@inheritdoc}
*/
public function getLocale()
{
return $this->locale;
}
/**
* Sets the fallback locales.
*
* @param array $locales The fallback locales
*
* @throws InvalidArgumentException If a locale contains invalid characters
*/
public function setFallbackLocales(array $locales)
{
// needed as the fallback locales are linked to the already loaded catalogues
$this->catalogues = array();
foreach ($locales as $locale) {
$this->assertValidLocale($locale);
}
$this->fallbackLocales = $locales;
}
/**
* Gets the fallback locales.
*
* @return array $locales The fallback locales
*/
public function getFallbackLocales()
{
return $this->fallbackLocales;
}
/**
* {@inheritdoc}
*/
public function trans($id, array $parameters = array(), $domain = null, $locale = null)
{
if (null === $domain) {
$domain = 'messages';
}
return $this->formatter->format($this->getCatalogue($locale)->get((string) $id, $domain), $locale, $parameters);
}
/**
* {@inheritdoc}
*/
public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
{
if (!$this->formatter instanceof ChoiceMessageFormatterInterface) {
throw new LogicException(sprintf('The formatter "%s" does not support plural translations.', \get_class($this->formatter)));
}
if (null === $domain) {
$domain = 'messages';
}
$id = (string) $id;
$catalogue = $this->getCatalogue($locale);
$locale = $catalogue->getLocale();
while (!$catalogue->defines($id, $domain)) {
if ($cat = $catalogue->getFallbackCatalogue()) {
$catalogue = $cat;
$locale = $catalogue->getLocale();
} else {
break;
}
}
return $this->formatter->choiceFormat($catalogue->get($id, $domain), $number, $locale, $parameters);
}
/**
* {@inheritdoc}
*/
public function getCatalogue($locale = null)
{
if (null === $locale) {
$locale = $this->getLocale();
} else {
$this->assertValidLocale($locale);
}
if (!isset($this->catalogues[$locale])) {
$this->loadCatalogue($locale);
}
return $this->catalogues[$locale];
}
/**
* Gets the loaders.
*
* @return array LoaderInterface[]
*/
protected function getLoaders()
{
return $this->loaders;
}
/**
* @param string $locale
*/
protected function loadCatalogue($locale)
{
if (null === $this->cacheDir) {
$this->initializeCatalogue($locale);
} else {
$this->initializeCacheCatalogue($locale);
}
}
/**
* @param string $locale
*/
protected function initializeCatalogue($locale)
{
$this->assertValidLocale($locale);
try {
$this->doLoadCatalogue($locale);
} catch (NotFoundResourceException $e) {
if (!$this->computeFallbackLocales($locale)) {
throw $e;
}
}
$this->loadFallbackCatalogues($locale);
}
private function initializeCacheCatalogue(string $locale): void
{
if (isset($this->catalogues[$locale])) {
/* Catalogue already initialized. */
return;
}
$this->assertValidLocale($locale);
$cache = $this->getConfigCacheFactory()->cache($this->getCatalogueCachePath($locale),
function (ConfigCacheInterface $cache) use ($locale) {
$this->dumpCatalogue($locale, $cache);
}
);
if (isset($this->catalogues[$locale])) {
/* Catalogue has been initialized as it was written out to cache. */
return;
}
/* Read catalogue from cache. */
$this->catalogues[$locale] = include $cache->getPath();
}
private function dumpCatalogue($locale, ConfigCacheInterface $cache): void
{
$this->initializeCatalogue($locale);
$fallbackContent = $this->getFallbackContent($this->catalogues[$locale]);
$content = sprintf(<<<EOF
<?php
use Symfony\Component\Translation\MessageCatalogue;
\$catalogue = new MessageCatalogue('%s', %s);
%s
return \$catalogue;
EOF
,
$locale,
var_export($this->catalogues[$locale]->all(), true),
$fallbackContent
);
$cache->write($content, $this->catalogues[$locale]->getResources());
}
private function getFallbackContent(MessageCatalogue $catalogue): string
{
$fallbackContent = '';
$current = '';
$replacementPattern = '/[^a-z0-9_]/i';
$fallbackCatalogue = $catalogue->getFallbackCatalogue();
while ($fallbackCatalogue) {
$fallback = $fallbackCatalogue->getLocale();
$fallbackSuffix = ucfirst(preg_replace($replacementPattern, '_', $fallback));
$currentSuffix = ucfirst(preg_replace($replacementPattern, '_', $current));
$fallbackContent .= sprintf(<<<'EOF'
$catalogue%s = new MessageCatalogue('%s', %s);
$catalogue%s->addFallbackCatalogue($catalogue%s);
EOF
,
$fallbackSuffix,
$fallback,
var_export($fallbackCatalogue->all(), true),
$currentSuffix,
$fallbackSuffix
);
$current = $fallbackCatalogue->getLocale();
$fallbackCatalogue = $fallbackCatalogue->getFallbackCatalogue();
}
return $fallbackContent;
}
private function getCatalogueCachePath($locale)
{
return $this->cacheDir.'/catalogue.'.$locale.'.'.strtr(substr(base64_encode(hash('sha256', serialize($this->fallbackLocales), true)), 0, 7), '/', '_').'.php';
}
private function doLoadCatalogue($locale): void
{
$this->catalogues[$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): void
{
$current = $this->catalogues[$locale];
foreach ($this->computeFallbackLocales($locale) as $fallback) {
if (!isset($this->catalogues[$fallback])) {
$this->initializeCatalogue($fallback);
}
$fallbackCatalogue = new MessageCatalogue($fallback, $this->catalogues[$fallback]->all());
foreach ($this->catalogues[$fallback]->getResources() as $resource) {
$fallbackCatalogue->addResource($resource);
}
$current->addFallbackCatalogue($fallbackCatalogue);
$current = $fallbackCatalogue;
}
}
protected function computeFallbackLocales($locale)
{
$locales = array();
foreach ($this->fallbackLocales as $fallback) {
if ($fallback === $locale) {
continue;
}
$locales[] = $fallback;
}
if (false !== strrchr($locale, '_')) {
array_unshift($locales, substr($locale, 0, -\strlen(strrchr($locale, '_'))));
}
return array_unique($locales);
}
/**
* Asserts that the locale is valid, throws an Exception if not.
*
* @param string $locale Locale to tests
*
* @throws InvalidArgumentException If the locale contains invalid characters
*/
protected function assertValidLocale($locale)
{
if (1 !== preg_match('/^[a-z0-9@_\\.\\-]*$/i', $locale)) {
throw new InvalidArgumentException(sprintf('Invalid "%s" locale.', $locale));
}
}
/**
* Provides the ConfigCache factory implementation, falling back to a
* default implementation if necessary.
*/
private function getConfigCacheFactory(): ConfigCacheFactoryInterface
{
if (!$this->configCacheFactory) {
$this->configCacheFactory = new ConfigCacheFactory($this->debug);
}
return $this->configCacheFactory;
}
}