1<?php 2 3/* 4 * This file is part of the Symfony package. 5 * 6 * (c) Fabien Potencier <fabien@symfony.com> 7 * 8 * For the full copyright and license information, please view the LICENSE 9 * file that was distributed with this source code. 10 */ 11 12namespace Symfony\Component\Translation\Loader; 13 14use Symfony\Component\Translation\Exception\InvalidResourceException; 15use Symfony\Component\Translation\Exception\LogicException; 16use Symfony\Component\Yaml\Exception\ParseException; 17use Symfony\Component\Yaml\Parser as YamlParser; 18use Symfony\Component\Yaml\Yaml; 19 20/** 21 * YamlFileLoader loads translations from Yaml files. 22 * 23 * @author Fabien Potencier <fabien@symfony.com> 24 */ 25class YamlFileLoader extends FileLoader 26{ 27 private $yamlParser; 28 29 /** 30 * {@inheritdoc} 31 */ 32 protected function loadResource($resource) 33 { 34 if (null === $this->yamlParser) { 35 if (!class_exists(\Symfony\Component\Yaml\Parser::class)) { 36 throw new LogicException('Loading translations from the YAML format requires the Symfony Yaml component.'); 37 } 38 39 $this->yamlParser = new YamlParser(); 40 } 41 42 try { 43 $messages = $this->yamlParser->parseFile($resource, Yaml::PARSE_CONSTANT); 44 } catch (ParseException $e) { 45 throw new InvalidResourceException(sprintf('The file "%s" does not contain valid YAML: ', $resource).$e->getMessage(), 0, $e); 46 } 47 48 if (null !== $messages && !\is_array($messages)) { 49 throw new InvalidResourceException(sprintf('Unable to load file "%s".', $resource)); 50 } 51 52 return $messages ?: []; 53 } 54} 55