450 lines
14 KiB
PHP
450 lines
14 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\Config\ConfigCacheFactory;
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use Symfony\Component\Config\ConfigCacheFactoryInterface;
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use Symfony\Component\Config\ConfigCacheInterface;
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use Symfony\Component\Translation\Exception\InvalidArgumentException;
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use Symfony\Component\Translation\Exception\NotFoundResourceException;
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use Symfony\Component\Translation\Exception\RuntimeException;
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use Symfony\Component\Translation\Formatter\IntlFormatterInterface;
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use Symfony\Component\Translation\Formatter\MessageFormatter;
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use Symfony\Component\Translation\Formatter\MessageFormatterInterface;
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use Symfony\Component\Translation\Loader\LoaderInterface;
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use Symfony\Contracts\Translation\LocaleAwareInterface;
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use Symfony\Contracts\Translation\TranslatableInterface;
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use Symfony\Contracts\Translation\TranslatorInterface;
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// Help opcache.preload discover always-needed symbols
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class_exists(MessageCatalogue::class);
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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, LocaleAwareInterface
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{
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/**
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* @var MessageCatalogueInterface[]
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*/
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protected array $catalogues = [];
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private string $locale;
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/**
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* @var string[]
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*/
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private array $fallbackLocales = [];
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/**
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* @var LoaderInterface[]
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*/
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private array $loaders = [];
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private array $resources = [];
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private MessageFormatterInterface $formatter;
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private ?string $cacheDir;
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private bool $debug;
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private array $cacheVary;
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private ?ConfigCacheFactoryInterface $configCacheFactory;
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private array $parentLocales;
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private bool $hasIntlFormatter;
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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(string $locale, ?MessageFormatterInterface $formatter = null, ?string $cacheDir = null, bool $debug = false, array $cacheVary = [])
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{
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$this->setLocale($locale);
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$this->formatter = $formatter ??= new MessageFormatter();
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$this->cacheDir = $cacheDir;
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$this->debug = $debug;
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$this->cacheVary = $cacheVary;
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$this->hasIntlFormatter = $formatter instanceof IntlFormatterInterface;
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}
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public function setConfigCacheFactory(ConfigCacheFactoryInterface $configCacheFactory): void
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{
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$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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*/
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public function addLoader(string $format, LoaderInterface $loader): void
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{
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$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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*
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* @throws InvalidArgumentException If the locale contains invalid characters
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*/
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public function addResource(string $format, mixed $resource, string $locale, ?string $domain = null): void
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{
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$domain ??= 'messages';
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$this->assertValidLocale($locale);
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$locale ?: $locale = class_exists(\Locale::class) ? \Locale::getDefault() : 'en';
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$this->resources[$locale][] = [$format, $resource, $domain];
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if (\in_array($locale, $this->fallbackLocales, true)) {
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$this->catalogues = [];
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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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public function setLocale(string $locale): void
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{
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$this->assertValidLocale($locale);
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$this->locale = $locale;
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}
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public function getLocale(): string
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{
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return $this->locale ?: (class_exists(\Locale::class) ? \Locale::getDefault() : 'en');
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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 string[] $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 $locales): void
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{
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// needed as the fallback locales are linked to the already loaded catalogues
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$this->catalogues = [];
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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 = $this->cacheVary['fallback_locales'] = $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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* @internal
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*/
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public function getFallbackLocales(): array
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{
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return $this->fallbackLocales;
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}
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public function trans(?string $id, array $parameters = [], ?string $domain = null, ?string $locale = null): string
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{
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if (null === $id || '' === $id) {
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return '';
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}
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$domain ??= 'messages';
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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 = $catalogue->getLocale();
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} else {
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break;
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}
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}
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$parameters = array_map(fn ($parameter) => $parameter instanceof TranslatableInterface ? $parameter->trans($this, $locale) : $parameter, $parameters);
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$len = \strlen(MessageCatalogue::INTL_DOMAIN_SUFFIX);
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if ($this->hasIntlFormatter
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&& ($catalogue->defines($id, $domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)
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|| (\strlen($domain) > $len && 0 === substr_compare($domain, MessageCatalogue::INTL_DOMAIN_SUFFIX, -$len, $len)))
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) {
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return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, $parameters);
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}
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return $this->formatter->format($catalogue->get($id, $domain), $locale, $parameters);
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}
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public function getCatalogue(?string $locale = null): MessageCatalogueInterface
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{
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if (!$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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public function getCatalogues(): array
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{
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return array_values($this->catalogues);
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}
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/**
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* Gets the loaders.
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*
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* @return LoaderInterface[]
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*/
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protected function getLoaders(): array
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{
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return $this->loaders;
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}
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protected function loadCatalogue(string $locale): void
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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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protected function initializeCatalogue(string $locale): void
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{
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$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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private function initializeCacheCatalogue(string $locale): void
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{
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if (isset($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(string $locale, ConfigCacheInterface $cache): void
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{
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$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->getAllMessages($this->catalogues[$locale]), 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 $catalogue): string
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{
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$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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$fallback,
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var_export($this->getAllMessages($fallbackCatalogue), true),
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$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(string $locale): string
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{
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return $this->cacheDir.'/catalogue.'.$locale.'.'.strtr(substr(base64_encode(hash('xxh128', serialize($this->cacheVary), true)), 0, 7), '/', '_').'.php';
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}
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/**
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* @internal
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*/
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protected function doLoadCatalogue(string $locale): void
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{
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$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[$resource[0]])) {
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if (\is_string($resource[1])) {
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throw new RuntimeException(sprintf('No loader is registered for the "%s" format when loading the "%s" resource.', $resource[0], $resource[1]));
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}
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throw new RuntimeException(sprintf('No loader is registered for the "%s" format.', $resource[0]));
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}
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$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(string $locale): void
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{
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$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->initializeCatalogue($fallback);
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}
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$fallbackCatalogue = new MessageCatalogue($fallback, $this->getAllMessages($this->catalogues[$fallback]));
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foreach ($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(string $locale): array
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{
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$this->parentLocales ??= json_decode(file_get_contents(__DIR__.'/Resources/data/parents.json'), true);
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$originLocale = $locale;
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$locales = [];
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while ($locale) {
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$parent = $this->parentLocales[$locale] ?? null;
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if ($parent) {
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$locale = 'root' !== $parent ? $parent : null;
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} elseif (\function_exists('locale_parse')) {
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$localeSubTags = locale_parse($locale);
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$locale = null;
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if (1 < \count($localeSubTags)) {
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array_pop($localeSubTags);
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$locale = locale_compose($localeSubTags) ?: null;
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}
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} elseif ($i = strrpos($locale, '_') ?: strrpos($locale, '-')) {
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$locale = substr($locale, 0, $i);
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} else {
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$locale = null;
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}
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if (null !== $locale) {
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$locales[] = $locale;
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}
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}
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foreach ($this->fallbackLocales as $fallback) {
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if ($fallback === $originLocale) {
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continue;
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}
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$locales[] = $fallback;
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}
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return array_unique($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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* @throws InvalidArgumentException If the locale contains invalid characters
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*/
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protected function assertValidLocale(string $locale): void
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{
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if (!preg_match('/^[a-z0-9@_\\.\\-]*$/i', $locale)) {
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throw new InvalidArgumentException(sprintf('Invalid "%s" locale.', $locale));
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}
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}
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/**
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* Provides the ConfigCache factory implementation, falling back to a
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* default implementation if necessary.
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*/
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private function getConfigCacheFactory(): ConfigCacheFactoryInterface
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{
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$this->configCacheFactory ??= new ConfigCacheFactory($this->debug);
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return $this->configCacheFactory;
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}
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private function getAllMessages(MessageCatalogueInterface $catalogue): array
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{
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$allMessages = [];
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foreach ($catalogue->all() as $domain => $messages) {
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if ($intlMessages = $catalogue->all($domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) {
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$allMessages[$domain.MessageCatalogue::INTL_DOMAIN_SUFFIX] = $intlMessages;
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$messages = array_diff_key($messages, $intlMessages);
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}
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if ($messages) {
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$allMessages[$domain] = $messages;
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}
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}
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return $allMessages;
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}
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}
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