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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\Loader;
use Symfony\Component\Translation\Exception\InvalidResourceException;
use Symfony\Component\Translation\Exception\LogicException;
use Symfony\Component\Yaml\Exception\ParseException;
use Symfony\Component\Yaml\Parser as YamlParser;
use Symfony\Component\Yaml\Yaml;
/**
* YamlFileLoader loads translations from Yaml files.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class YamlFileLoader extends FileLoader
{
private $yamlParser;
/**
* {@inheritdoc}
*/
protected function loadResource($resource)
{
if (null === $this->yamlParser) {
if (!class_exists(\Symfony\Component\Yaml\Parser::class)) {
throw new LogicException('Loading translations from the YAML format requires the Symfony Yaml component.');
}
$this->yamlParser = new YamlParser();
}
try {
$messages = $this->yamlParser->parseFile($resource, Yaml::PARSE_CONSTANT);
} catch (ParseException $e) {
throw new InvalidResourceException(sprintf('The file "%s" does not contain valid YAML: ', $resource).$e->getMessage(), 0, $e);
}
if (null !== $messages && !\is_array($messages)) {
throw new InvalidResourceException(sprintf('Unable to load file "%s".', $resource));
}
return $messages ?: [];
}
}