Subversion-Projekte lars-tiefland.laravel_shop

<?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\Util;

use Symfony\Component\Translation\Exception\InvalidArgumentException;

use Symfony\Component\Translation\Exception\InvalidResourceException;

/**

 * Provides some utility methods for XLIFF translation files, such as validating

 * their contents according to the XSD schema.

 *

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

 */

class XliffUtils

{

    /**

     * Gets xliff file version based on the root "version" attribute.

     *

     * Defaults to 1.2 for backwards compatibility.

     *

     * @throws InvalidArgumentException

     */

    public static function getVersionNumber(\DOMDocument $dom): string

    {

        /** @var \DOMNode $xliff */

        foreach ($dom->getElementsByTagName('xliff') as $xliff) {

            $version = $xliff->attributes->getNamedItem('version');

            if ($version) {

                return $version->nodeValue;

            }

            $namespace = $xliff->attributes->getNamedItem('xmlns');

            if ($namespace) {

                if (0 !== substr_compare('urn:oasis:names:tc:xliff:document:', $namespace->nodeValue, 0, 34)) {

                    throw new InvalidArgumentException(sprintf('Not a valid XLIFF namespace "%s".', $namespace));

                }

                return substr($namespace, 34);

            }

        }

        // Falls back to v1.2

        return '1.2';

    }

    /**

     * Validates and parses the given file into a DOMDocument.

     *

     * @throws InvalidResourceException

     */

    public static function validateSchema(\DOMDocument $dom): array

    {

        $xliffVersion = static::getVersionNumber($dom);

        $internalErrors = libxml_use_internal_errors(true);

        if ($shouldEnable = self::shouldEnableEntityLoader()) {

            $disableEntities = libxml_disable_entity_loader(false);

        }

        try {

            $isValid = @$dom->schemaValidateSource(self::getSchema($xliffVersion));

            if (!$isValid) {

                return self::getXmlErrors($internalErrors);

            }

        } finally {

            if ($shouldEnable) {

                libxml_disable_entity_loader($disableEntities);

            }

        }

        $dom->normalizeDocument();

        libxml_clear_errors();

        libxml_use_internal_errors($internalErrors);

        return [];

    }

    private static function shouldEnableEntityLoader(): bool

    {

        static $dom, $schema;

        if (null === $dom) {

            $dom = new \DOMDocument();

            $dom->loadXML('<?xml version="1.0"?><test/>');

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

            register_shutdown_function(static function () use ($tmpfile) {

                @unlink($tmpfile);

            });

            $schema = '<?xml version="1.0" encoding="utf-8"?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <xsd:include schemaLocation="file:///'.str_replace('\\', '/', $tmpfile).'" />

</xsd:schema>';

            file_put_contents($tmpfile, '<?xml version="1.0" encoding="utf-8"?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <xsd:element name="test" type="testType" />

  <xsd:complexType name="testType"/>

</xsd:schema>');

        }

        return !@$dom->schemaValidateSource($schema);

    }

    public static function getErrorsAsString(array $xmlErrors): string

    {

        $errorsAsString = '';

        foreach ($xmlErrors as $error) {

            $errorsAsString .= sprintf("[%s %s] %s (in %s - line %d, column %d)\n",

                \LIBXML_ERR_WARNING === $error['level'] ? 'WARNING' : 'ERROR',

                $error['code'],

                $error['message'],

                $error['file'],

                $error['line'],

                $error['column']

            );

        }

        return $errorsAsString;

    }

    private static function getSchema(string $xliffVersion): string

    {

        if ('1.2' === $xliffVersion) {

            $schemaSource = file_get_contents(__DIR__.'/../Resources/schemas/xliff-core-1.2-transitional.xsd');

            $xmlUri = 'http://www.w3.org/2001/xml.xsd';

        } elseif ('2.0' === $xliffVersion) {

            $schemaSource = file_get_contents(__DIR__.'/../Resources/schemas/xliff-core-2.0.xsd');

            $xmlUri = 'informativeCopiesOf3rdPartySchemas/w3c/xml.xsd';

        } else {

            throw new InvalidArgumentException(sprintf('No support implemented for loading XLIFF version "%s".', $xliffVersion));

        }

        return self::fixXmlLocation($schemaSource, $xmlUri);

    }

    /**

     * Internally changes the URI of a dependent xsd to be loaded locally.

     */

    private static function fixXmlLocation(string $schemaSource, string $xmlUri): string

    {

        $newPath = str_replace('\\', '/', __DIR__).'/../Resources/schemas/xml.xsd';

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

        $locationstart = 'file:///';

        if (0 === stripos($newPath, 'phar://')) {

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

            if ($tmpfile) {

                copy($newPath, $tmpfile);

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

            } else {

                array_shift($parts);

                $locationstart = 'phar:///';

            }

        }

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

        $newPath = $locationstart.$drive.implode('/', array_map('rawurlencode', $parts));

        return str_replace($xmlUri, $newPath, $schemaSource);

    }

    /**

     * Returns the XML errors of the internal XML parser.

     */

    private static function getXmlErrors(bool $internalErrors): array

    {

        $errors = [];

        foreach (libxml_get_errors() as $error) {

            $errors[] = [

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

                'code' => $error->code,

                'message' => trim($error->message),

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

                'line' => $error->line,

                'column' => $error->column,

            ];

        }

        libxml_clear_errors();

        libxml_use_internal_errors($internalErrors);

        return $errors;

    }

}