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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\NotFoundResourceException;
use Symfony\Component\Translation\Exception\RuntimeException;
use Symfony\Component\Translation\Formatter\IntlFormatterInterface;
use Symfony\Component\Translation\Formatter\MessageFormatter;
use Symfony\Component\Translation\Formatter\MessageFormatterInterface;
use Symfony\Component\Translation\Loader\LoaderInterface;
use Symfony\Contracts\Translation\LocaleAwareInterface;
use Symfony\Contracts\Translation\TranslatableInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
// Help opcache.preload discover always-needed symbols
class_exists(MessageCatalogue::class);
/**
* @author Fabien Potencier <fabien@symfony.com>
*/
class Translator implements TranslatorInterface, TranslatorBagInterface, LocaleAwareInterface
{
/**
* @var MessageCatalogueInterface[]
*/
protected $catalogues = [];
private string $locale;
/**
* @var string[]
*/
private array $fallbackLocales = [];
/**
* @var LoaderInterface[]
*/
private array $loaders = [];
private array $resources = [];
private MessageFormatterInterface $formatter;
private ?string $cacheDir;
private bool $debug;
private array $cacheVary;
private ?ConfigCacheFactoryInterface $configCacheFactory;
private array $parentLocales;
private bool $hasIntlFormatter;
/**
* @throws InvalidArgumentException If a locale contains invalid characters
*/
public function __construct(string $locale, MessageFormatterInterface $formatter = null, string $cacheDir = null, bool $debug = false, array $cacheVary = [])
{
$this->setLocale($locale);
$this->formatter = $formatter ??= new MessageFormatter();
$this->cacheDir = $cacheDir;
$this->debug = $debug;
$this->cacheVary = $cacheVary;
$this->hasIntlFormatter = $formatter instanceof IntlFormatterInterface;
}
public function setConfigCacheFactory(ConfigCacheFactoryInterface $configCacheFactory)
{
$this->configCacheFactory = $configCacheFactory;
}
/**
* Adds a Loader.
*
* @param string $format The name of the loader (@see addResource())
*/
public function addLoader(string $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
*
* @throws InvalidArgumentException If the locale contains invalid characters
*/
public function addResource(string $format, mixed $resource, string $locale, string $domain = null)
{
$domain ??= 'messages';
$this->assertValidLocale($locale);
$locale ?: $locale = class_exists(\Locale::class) ? \Locale::getDefault() : 'en';
$this->resources[$locale][] = [$format, $resource, $domain];
if (\in_array($locale, $this->fallbackLocales)) {
$this->catalogues = [];
} else {
unset($this->catalogues[$locale]);
}
}
public function setLocale(string $locale)
{
$this->assertValidLocale($locale);
$this->locale = $locale;
}
public function getLocale(): string
{
return $this->locale ?: (class_exists(\Locale::class) ? \Locale::getDefault() : 'en');
}
/**
* Sets the fallback locales.
*
* @param string[] $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
$this->catalogues = [];
foreach ($locales as $locale) {
$this->assertValidLocale($locale);
}
$this->fallbackLocales = $this->cacheVary['fallback_locales'] = $locales;
}
/**
* Gets the fallback locales.
*
* @internal
*/
public function getFallbackLocales(): array
{
return $this->fallbackLocales;
}
public function trans(?string $id, array $parameters = [], string $domain = null, string $locale = null): string
{
if (null === $id || '' === $id) {
return '';
}
$domain ??= 'messages';
$catalogue = $this->getCatalogue($locale);
$locale = $catalogue->getLocale();
while (!$catalogue->defines($id, $domain)) {
if ($cat = $catalogue->getFallbackCatalogue()) {
$catalogue = $cat;
$locale = $catalogue->getLocale();
} else {
break;
}
}
$parameters = array_map(function ($parameter) use ($locale) {
return $parameter instanceof TranslatableInterface ? $parameter->trans($this, $locale) : $parameter;
}, $parameters);
$len = \strlen(MessageCatalogue::INTL_DOMAIN_SUFFIX);
if ($this->hasIntlFormatter
&& ($catalogue->defines($id, $domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)
|| (\strlen($domain) > $len && 0 === substr_compare($domain, MessageCatalogue::INTL_DOMAIN_SUFFIX, -$len, $len)))
) {
return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, $parameters);
}
return $this->formatter->format($catalogue->get($id, $domain), $locale, $parameters);
}
public function getCatalogue(string $locale = null): MessageCatalogueInterface
{
if (!$locale) {
$locale = $this->getLocale();
} else {
$this->assertValidLocale($locale);
}
if (!isset($this->catalogues[$locale])) {
$this->loadCatalogue($locale);
}
return $this->catalogues[$locale];
}
public function getCatalogues(): array
{
return array_values($this->catalogues);
}
/**
* Gets the loaders.
*
* @return LoaderInterface[]
*/
protected function getLoaders(): array
{
return $this->loaders;
}
protected function loadCatalogue(string $locale)
{
if (null === $this->cacheDir) {
$this->initializeCatalogue($locale);
} else {
$this->initializeCacheCatalogue($locale);
}
}
protected function initializeCatalogue(string $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(string $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->getAllMessages($this->catalogues[$locale]), 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,
$fallback,
var_export($this->getAllMessages($fallbackCatalogue), true),
$currentSuffix,
$fallbackSuffix
);
$current = $fallbackCatalogue->getLocale();
$fallbackCatalogue = $fallbackCatalogue->getFallbackCatalogue();
}
return $fallbackContent;
}
private function getCatalogueCachePath(string $locale): string
{
return $this->cacheDir.'/catalogue.'.$locale.'.'.strtr(substr(base64_encode(hash('sha256', serialize($this->cacheVary), true)), 0, 7), '/', '_').'.php';
}
/**
* @internal
*/
protected function doLoadCatalogue(string $locale): void
{
$this->catalogues[$locale] = new MessageCatalogue($locale);
if (isset($this->resources[$locale])) {
foreach ($this->resources[$locale] as $resource) {
if (!isset($this->loaders[$resource[0]])) {
if (\is_string($resource[1])) {
throw new RuntimeException(sprintf('No loader is registered for the "%s" format when loading the "%s" resource.', $resource[0], $resource[1]));
}
throw new RuntimeException(sprintf('No loader is registered for the "%s" format.', $resource[0]));
}
$this->catalogues[$locale]->addCatalogue($this->loaders[$resource[0]]->load($resource[1], $locale, $resource[2]));
}
}
}
private function loadFallbackCatalogues(string $locale): void
{
$current = $this->catalogues[$locale];
foreach ($this->computeFallbackLocales($locale) as $fallback) {
if (!isset($this->catalogues[$fallback])) {
$this->initializeCatalogue($fallback);
}
$fallbackCatalogue = new MessageCatalogue($fallback, $this->getAllMessages($this->catalogues[$fallback]));
foreach ($this->catalogues[$fallback]->getResources() as $resource) {
$fallbackCatalogue->addResource($resource);
}
$current->addFallbackCatalogue($fallbackCatalogue);
$current = $fallbackCatalogue;
}
}
protected function computeFallbackLocales(string $locale)
{
$this->parentLocales ??= json_decode(file_get_contents(__DIR__.'/Resources/data/parents.json'), true);
$originLocale = $locale;
$locales = [];
while ($locale) {
$parent = $this->parentLocales[$locale] ?? null;
if ($parent) {
$locale = 'root' !== $parent ? $parent : null;
} elseif (\function_exists('locale_parse')) {
$localeSubTags = locale_parse($locale);
$locale = null;
if (1 < \count($localeSubTags)) {
array_pop($localeSubTags);
$locale = locale_compose($localeSubTags) ?: null;
}
} elseif ($i = strrpos($locale, '_') ?: strrpos($locale, '-')) {
$locale = substr($locale, 0, $i);
} else {
$locale = null;
}
if (null !== $locale) {
$locales[] = $locale;
}
}
foreach ($this->fallbackLocales as $fallback) {
if ($fallback === $originLocale) {
continue;
}
$locales[] = $fallback;
}
return array_unique($locales);
}
/**
* Asserts that the locale is valid, throws an Exception if not.
*
* @throws InvalidArgumentException If the locale contains invalid characters
*/
protected function assertValidLocale(string $locale)
{
if (!preg_match('/^[a-z0-9@_\\.\\-]*$/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
{
$this->configCacheFactory ??= new ConfigCacheFactory($this->debug);
return $this->configCacheFactory;
}
private function getAllMessages(MessageCatalogueInterface $catalogue): array
{
$allMessages = [];
foreach ($catalogue->all() as $domain => $messages) {
if ($intlMessages = $catalogue->all($domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) {
$allMessages[$domain.MessageCatalogue::INTL_DOMAIN_SUFFIX] = $intlMessages;
$messages = array_diff_key($messages, $intlMessages);
}
if ($messages) {
$allMessages[$domain] = $messages;
}
}
return $allMessages;
}
}
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