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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;
	}

	/**
	* @return void
	*/
	public function setConfigCacheFactory(ConfigCacheFactoryInterface $configCacheFactory)
	{
	$this->configCacheFactory = $configCacheFactory;
	}

	/**
	* Adds a Loader.
	*
	* @param string $format The name of the loader (@see addResource())
	*
	* @return void
	*/
	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
	*
	* @return void
	*
	* @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]);
	}
	}

	/**
	* @return void
	*/
	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
	*
	* @return void
	*
	* @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;
	}
	}

	$parameters = array_map(fn ($parameter) => $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;
	}

	/**
	* @return void
	*/
	protected function loadCatalogue(string $locale)
	{
	if (null === $this->cacheDir) {
	$this->initializeCatalogue($locale);
	} else {
	$this->initializeCacheCatalogue($locale);
	}
	}

	/**
	* @return void
	*/
	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;
	}
	}

	/**
	* @return array
	*/
	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.
	*
	* @return void
	*
	* @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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