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Edit File : Translator.php \| Size : 16.06 KB
<?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\IntlFormatterInterface; use Symfony\Component\Translation\Formatter\MessageFormatter; use Symfony\Component\Translation\Formatter\MessageFormatterInterface; use Symfony\Component\Translation\Loader\LoaderInterface; use Symfony\Component\Translation\TranslatorInterface as LegacyTranslatorInterface; use Symfony\Contracts\Translation\TranslatorInterface; /* * @author Fabien Potencier <fabien@symfony.com> / class Translator implements LegacyTranslatorInterface, TranslatorInterface, TranslatorBagInterface { /* * @var MessageCatalogueInterface[] / protected $catalogues = []; /* * @var string / private $locale; /* * @var array / private $fallbackLocales = []; /* * @var LoaderInterface[] / private $loaders = []; /* * @var array / private $resources = []; /* * @var MessageFormatterInterface / private $formatter; /* * @var string / private $cacheDir; /* * @var bool / private $debug; private $cacheVary; /* * @var ConfigCacheFactoryInterface\|null / private $configCacheFactory; /* * @var array\|null / private $parentLocales; private $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 = []) { if (null === $locale) { @trigger_error(sprintf('Passing "null" as the $locale argument to %s() is deprecated since Symfony 4.4.', __METHOD__), E_USER_DEPRECATED); } $this->setLocale($locale, false); if (null === $formatter) { $formatter = new MessageFormatter(); } $this->formatter = $formatter; $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 $format The name of the loader (@see addResource()) / public function addLoader($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'; } if (null === $locale) { @trigger_error(sprintf('Passing "null" to the third argument of the "%s" method has been deprecated since Symfony 4.4 and will throw an error in 5.0.', __METHOD__), E_USER_DEPRECATED); } $this->assertValidLocale($locale); $this->resources[$locale][] = [$format, $resource, $domain]; if (\in_array($locale, $this->fallbackLocales)) { $this->catalogues = []; } else { unset($this->catalogues[$locale]); } } /* * {@inheritdoc} / public function setLocale($locale) { if (null === $locale && (2 > \func_num_args() \|\| func_get_arg(1))) { @trigger_error(sprintf('Passing "null" as the $locale argument to %s() is deprecated since Symfony 4.4.', __METHOD__), E_USER_DEPRECATED); } $this->assertValidLocale($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 $this->catalogues = []; foreach ($locales as $locale) { if (null === $locale) { @trigger_error(sprintf('Passing "null" as the $locale argument to %s() is deprecated since Symfony 4.4.', __METHOD__), E_USER_DEPRECATED); } $this->assertValidLocale($locale); } $this->fallbackLocales = $this->cacheVary['fallback_locales'] = $locales; } /* * Gets the fallback locales. * * @internal since Symfony 4.2 * * @return array The fallback locales / public function getFallbackLocales() { return $this->fallbackLocales; } /* * {@inheritdoc} / public function trans($id, array $parameters = [], $domain = null, $locale = null) { if ('' === $id = (string) $id) { return ''; } if (null === $domain) { $domain = 'messages'; } $catalogue = $this->getCatalogue($locale); $locale = $catalogue->getLocale(); while (!$catalogue->defines($id, $domain)) { if ($cat = $catalogue->getFallbackCatalogue()) { $catalogue = $cat; $locale = $catalogue->getLocale(); } else { break; } } if ($this->hasIntlFormatter && $catalogue->defines($id, $domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) { return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, $parameters); } return $this->formatter->format($catalogue->get($id, $domain), $locale, $parameters); } /* * {@inheritdoc} * * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter / public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null) { @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the trans() one instead with a "%%count%%" parameter.', __METHOD__), E_USER_DEPRECATED); if ('' === $id = (string) $id) { return ''; } if (!$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'; } $catalogue = $this->getCatalogue($locale); $locale = $catalogue->getLocale(); while (!$catalogue->defines($id, $domain)) { if ($cat = $catalogue->getFallbackCatalogue()) { $catalogue = $cat; $locale = $catalogue->getLocale(); } else { break; } } if ($this->hasIntlFormatter && $catalogue->defines($id, $domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) { return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, ['%count%' => $number] + $parameters); } 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(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]])) { 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(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 = $fallbackCatalogue; } } protected function computeFallbackLocales($locale) { if (null === $this->parentLocales) { $parentLocales = json_decode(file_get_contents(__DIR__.'/Resources/data/parents.json'), true); } $locales = []; foreach ($this->fallbackLocales as $fallback) { if ($fallback === $locale) { continue; } $locales[] = $fallback; } while ($locale) { $parent = $parentLocales[$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 !== $locale) { array_unshift($locales, $locale); } } return array_unique($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; } 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; } } Back

Edit File : Translator.php | Size : 16.06 KB

<?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\IntlFormatterInterface;
use Symfony\Component\Translation\Formatter\MessageFormatter;
use Symfony\Component\Translation\Formatter\MessageFormatterInterface;
use Symfony\Component\Translation\Loader\LoaderInterface;
use Symfony\Component\Translation\TranslatorInterface as LegacyTranslatorInterface;
use Symfony\Contracts\Translation\TranslatorInterface;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Translator implements LegacyTranslatorInterface, TranslatorInterface, TranslatorBagInterface
{
    /**
     * @var MessageCatalogueInterface[]
     */
    protected $catalogues = [];

/**
     * @var string
     */
    private $locale;

/**
     * @var array
     */
    private $fallbackLocales = [];

/**
     * @var LoaderInterface[]
     */
    private $loaders = [];

/**
     * @var array
     */
    private $resources = [];

/**
     * @var MessageFormatterInterface
     */
    private $formatter;

/**
     * @var string
     */
    private $cacheDir;

/**
     * @var bool
     */
    private $debug;

private $cacheVary;

/**
     * @var ConfigCacheFactoryInterface|null
     */
    private $configCacheFactory;

/**
     * @var array|null
     */
    private $parentLocales;

private $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 = [])
    {
        if (null === $locale) {
            @trigger_error(sprintf('Passing "null" as the $locale argument to %s() is deprecated since Symfony 4.4.', __METHOD__), E_USER_DEPRECATED);
        }

$this->setLocale($locale, false);

if (null === $formatter) {
            $formatter = new MessageFormatter();
        }

$this->formatter = $formatter;
        $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 $format The name of the loader (@see addResource())
     */
    public function addLoader($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';
        }

if (null === $locale) {
            @trigger_error(sprintf('Passing "null" to the third argument of the "%s" method has been deprecated since Symfony 4.4 and will throw an error in 5.0.', __METHOD__), E_USER_DEPRECATED);
        }

$this->assertValidLocale($locale);

$this->resources[$locale][] = [$format, $resource, $domain];

if (\in_array($locale, $this->fallbackLocales)) {
            $this->catalogues = [];
        } else {
            unset($this->catalogues[$locale]);
        }
    }

/**
     * {@inheritdoc}
     */
    public function setLocale($locale)
    {
        if (null === $locale && (2 > \func_num_args() || func_get_arg(1))) {
            @trigger_error(sprintf('Passing "null" as the $locale argument to %s() is deprecated since Symfony 4.4.', __METHOD__), E_USER_DEPRECATED);
        }

$this->assertValidLocale($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 = [];

foreach ($locales as $locale) {
            if (null === $locale) {
                @trigger_error(sprintf('Passing "null" as the $locale argument to %s() is deprecated since Symfony 4.4.', __METHOD__), E_USER_DEPRECATED);
            }
            $this->assertValidLocale($locale);
        }

$this->fallbackLocales = $this->cacheVary['fallback_locales'] = $locales;
    }

/**
     * Gets the fallback locales.
     *
     * @internal since Symfony 4.2
     *
     * @return array The fallback locales
     */
    public function getFallbackLocales()
    {
        return $this->fallbackLocales;
    }

/**
     * {@inheritdoc}
     */
    public function trans($id, array $parameters = [], $domain = null, $locale = null)
    {
        if ('' === $id = (string) $id) {
            return '';
        }

if (null === $domain) {
            $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;
            }
        }

if ($this->hasIntlFormatter && $catalogue->defines($id, $domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) {
            return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, $parameters);
        }

return $this->formatter->format($catalogue->get($id, $domain), $locale, $parameters);
    }

/**
     * {@inheritdoc}
     *
     * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
     */
    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
    {
        @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the trans() one instead with a "%%count%%" parameter.', __METHOD__), E_USER_DEPRECATED);

if ('' === $id = (string) $id) {
            return '';
        }

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';
        }

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(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]])) {
                    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(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($locale)
    {
        if (null === $this->parentLocales) {
            $parentLocales = json_decode(file_get_contents(__DIR__.'/Resources/data/parents.json'), true);
        }

$locales = [];
        foreach ($this->fallbackLocales as $fallback) {
            if ($fallback === $locale) {
                continue;
            }

$locales[] = $fallback;
        }

while ($locale) {
            $parent = $parentLocales[$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 !== $locale) {
                array_unshift($locales, $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;
    }

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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