<?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\MessageCatalogue;

use Symfony\Component\Config\Resource\FileResource;

/**

 * XliffFileLoader loads translations from XLIFF files.

 *

 * @author Fabien Potencier <fabien@symfony.com>

 *

 * @api

 */

class XliffFileLoader implements LoaderInterface

{

    /**

     * {@inheritdoc}

     *

     * @api

     */

    public function load($resource, $locale, $domain = 'messages')

    {

        $xml = $this->parseFile($resource);

        $xml->registerXPathNamespace('xliff', 'urn:oasis:names:tc:xliff:document:1.2');

        $catalogue = new MessageCatalogue($locale);

        foreach ($xml->xpath('//xliff:trans-unit') as $translation) {

            $catalogue->set((string) $translation->source, (string) $translation->target, $domain);

        }

        $catalogue->addResource(new FileResource($resource));

        return $catalogue;

    }

    /**

     * Validates and parses the given file into a SimpleXMLElement

     *

     * @param  string $file

     * @return SimpleXMLElement

     */

    private function parseFile($file)

    {

        $dom = new \DOMDocument();

        $current = libxml_use_internal_errors(true);

        if (!@$dom->load($file, LIBXML_COMPACT)) {

            throw new \RuntimeException(implode("\n", $this->getXmlErrors()));

        }

        $location = str_replace('\\', '/', __DIR__).'/schema/dic/xliff-core/xml.xsd';

        $parts = explode('/', $location);

        if (preg_match('#^phar://#i', $location)) {

            $tmpfile = tempnam(sys_get_temp_dir(), 'sf2');

            if ($tmpfile) {

                file_put_contents($tmpfile, file_get_contents($location));

                $tmpfiles[] = $tmpfile;

                $parts = explode('/', str_replace('\\', '/', $tmpfile));

            }

        }

        $drive = '\\' === DIRECTORY_SEPARATOR ? array_shift($parts).'/' : '';

        $location = 'file:///'.$drive.implode('/', array_map('rawurlencode', $parts));

        $source = file_get_contents(__DIR__.'/schema/dic/xliff-core/xliff-core-1.2-strict.xsd');

        $source = str_replace('http://www.w3.org/2001/xml.xsd', $location, $source);

        if (!@$dom->schemaValidateSource($source)) {

            throw new \RuntimeException(implode("\n", $this->getXmlErrors()));

        }

        $dom->validateOnParse = true;

        $dom->normalizeDocument();

        libxml_use_internal_errors($current);

        return simplexml_import_dom($dom);

    }

    /**

     * Returns the XML errors of the internal XML parser

     *

     * @return array  An array of errors

     */

    private function getXmlErrors()

    {

        $errors = array();

        foreach (libxml_get_errors() as $error) {

            $errors[] = sprintf('[%s %s] %s (in %s - line %d, column %d)',

                LIBXML_ERR_WARNING == $error->level ? 'WARNING' : 'ERROR',

                $error->code,

                trim($error->message),

                $error->file ? $error->file : 'n/a',

                $error->line,

                $error->column

            );

        }

        libxml_clear_errors();

        libxml_use_internal_errors(false);

        return $errors;

    }

}