<?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\Bridge\Twig\Extension;
use Symfony\Bridge\Twig\NodeVisitor\TranslationDefaultDomainNodeVisitor;
use Symfony\Bridge\Twig\NodeVisitor\TranslationNodeVisitor;
use Symfony\Bridge\Twig\TokenParser\TransDefaultDomainTokenParser;
use Symfony\Bridge\Twig\TokenParser\TransTokenParser;
use Symfony\Component\Translation\TranslatableMessage;
use Symfony\Contracts\Translation\TranslatableInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
use Symfony\Contracts\Translation\TranslatorTrait;
use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;
use Twig\TwigFunction;
// Help opcache.preload discover always-needed symbols
class_exists(TranslatorInterface::class);
class_exists(TranslatorTrait::class);
/**
* Provides integration of the Translation component with Twig.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class TranslationExtension extends AbstractExtension
{
private $translator;
private $translationNodeVisitor;
public function __construct(?TranslatorInterface $translator = null, ?TranslationNodeVisitor $translationNodeVisitor = null)
{
$this->translator = $translator;
$this->translationNodeVisitor = $translationNodeVisitor;
}
public function getTranslator(): TranslatorInterface
{
if (null === $this->translator) {
if (!interface_exists(TranslatorInterface::class)) {
throw new \LogicException(sprintf('You cannot use the "%s" if the Translation Contracts are not available. Try running "composer require symfony/translation".', __CLASS__));
}
$this->translator = new class() implements TranslatorInterface {
use TranslatorTrait;
};
}
return $this->translator;
}
/**
* {@inheritdoc}
*/
public function getFunctions(): array
{
return [
new TwigFunction('t', [$this, 'createTranslatable']),
];
}
/**
* {@inheritdoc}
*/
public function getFilters(): array
{
return [
new TwigFilter('trans', [$this, 'trans']),
];
}
/**
* {@inheritdoc}
*/
public function getTokenParsers(): array
{
return [
// {% trans %}Symfony is great!{% endtrans %}
new TransTokenParser(),
// {% trans_default_domain "foobar" %}
new TransDefaultDomainTokenParser(),
];
}
/**
* {@inheritdoc}
*/
public function getNodeVisitors(): array
{
return [$this->getTranslationNodeVisitor(), new TranslationDefaultDomainNodeVisitor()];
}
public function getTranslationNodeVisitor(): TranslationNodeVisitor
{
return $this->translationNodeVisitor ?: $this->translationNodeVisitor = new TranslationNodeVisitor();
}
/**
* @param string|\Stringable|TranslatableInterface|null $message
* @param array|string $arguments Can be the locale as a string when $message is a TranslatableInterface
*/
public function trans($message, $arguments = [], ?string $domain = null, ?string $locale = null, ?int $count = null): string
{
if ($message instanceof TranslatableInterface) {
if ([] !== $arguments && !\is_string($arguments)) {
throw new \TypeError(sprintf('Argument 2 passed to "%s()" must be a locale passed as a string when the message is a "%s", "%s" given.', __METHOD__, TranslatableInterface::class, get_debug_type($arguments)));
}
if ($message instanceof TranslatableMessage && '' === $message->getMessage()) {
return '';
}
return $message->trans($this->getTranslator(), $locale ?? (\is_string($arguments) ? $arguments : null));
}
if (!\is_array($arguments)) {
throw new \TypeError(sprintf('Unless the message is a "%s", argument 2 passed to "%s()" must be an array of parameters, "%s" given.', TranslatableInterface::class, __METHOD__, get_debug_type($arguments)));
}
if ('' === $message = (string) $message) {
return '';
}
if (null !== $count) {
$arguments['%count%'] = $count;
}
return $this->getTranslator()->trans($message, $arguments, $domain, $locale);
}
public function createTranslatable(string $message, array $parameters = [], ?string $domain = null): TranslatableMessage
{
if (!class_exists(TranslatableMessage::class)) {
throw new \LogicException(sprintf('You cannot use the "%s" as the Translation Component is not installed. Try running "composer require symfony/translation".', __CLASS__));
}
return new TranslatableMessage($message, $parameters, $domain);
}
}