Viewing file:  XliffFileLoader.php (10.88 KB) -rw-r--r--
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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\Config\Util\XmlUtils;
use Symfony\Component\Translation\MessageCatalogue;
use Symfony\Component\Translation\Exception\InvalidResourceException;
use Symfony\Component\Translation\Exception\NotFoundResourceException;
use Symfony\Component\Config\Resource\FileResource;
/**
* XliffFileLoader loads translations from XLIFF files.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class XliffFileLoader implements LoaderInterface
{
/**
* {@inheritdoc}
*/
public function load($resource, $locale, $domain = 'messages')
{
if (!stream_is_local($resource)) {
throw new InvalidResourceException(sprintf('This is not a local file "%s".', $resource));
}
if (!file_exists($resource)) {
throw new NotFoundResourceException(sprintf('File "%s" not found.', $resource));
}
$catalogue = new MessageCatalogue($locale);
$this->extract($resource, $catalogue, $domain);
if (class_exists('Symfony\Component\Config\Resource\FileResource')) {
$catalogue->addResource(new FileResource($resource));
}
return $catalogue;
}
private function extract($resource, MessageCatalogue $catalogue, $domain)
{
try {
$dom = XmlUtils::loadFile($resource);
} catch (\InvalidArgumentException $e) {
throw new InvalidResourceException(sprintf('Unable to load "%s": %s', $resource, $e->getMessage()), $e->getCode(), $e);
}
$xliffVersion = $this->getVersionNumber($dom);
$this->validateSchema($xliffVersion, $dom, $this->getSchema($xliffVersion));
if ('1.2' === $xliffVersion) {
$this->extractXliff1($dom, $catalogue, $domain);
}
if ('2.0' === $xliffVersion) {
$this->extractXliff2($dom, $catalogue, $domain);
}
}
/**
* Extract messages and metadata from DOMDocument into a MessageCatalogue.
*
* @param \DOMDocument $dom Source to extract messages and metadata
* @param MessageCatalogue $catalogue Catalogue where we'll collect messages and metadata
* @param string $domain The domain
*/
private function extractXliff1(\DOMDocument $dom, MessageCatalogue $catalogue, $domain)
{
$xml = simplexml_import_dom($dom);
$encoding = strtoupper($dom->encoding);
$xml->registerXPathNamespace('xliff', 'urn:oasis:names:tc:xliff:document:1.2');
foreach ($xml->xpath('//xliff:trans-unit') as $translation) {
$attributes = $translation->attributes();
if (!(isset($attributes['resname']) || isset($translation->source))) {
continue;
}
$source = isset($attributes['resname']) && $attributes['resname'] ? $attributes['resname'] : $translation->source;
// If the xlf file has another encoding specified, try to convert it because
// simple_xml will always return utf-8 encoded values
$target = $this->utf8ToCharset((string) (isset($translation->target) ? $translation->target : $source), $encoding);
$catalogue->set((string) $source, $target, $domain);
$metadata = array();
if ($notes = $this->parseNotesMetadata($translation->note, $encoding)) {
$metadata['notes'] = $notes;
}
if (isset($translation->target) && $translation->target->attributes()) {
$metadata['target-attributes'] = array();
foreach ($translation->target->attributes() as $key => $value) {
$metadata['target-attributes'][$key] = (string) $value;
}
}
$catalogue->setMetadata((string) $source, $metadata, $domain);
}
}
/**
* @param \DOMDocument $dom
* @param MessageCatalogue $catalogue
* @param string $domain
*/
private function extractXliff2(\DOMDocument $dom, MessageCatalogue $catalogue, $domain)
{
$xml = simplexml_import_dom($dom);
$encoding = strtoupper($dom->encoding);
$xml->registerXPathNamespace('xliff', 'urn:oasis:names:tc:xliff:document:2.0');
foreach ($xml->xpath('//xliff:unit/xliff:segment') as $segment) {
$source = $segment->source;
// If the xlf file has another encoding specified, try to convert it because
// simple_xml will always return utf-8 encoded values
$target = $this->utf8ToCharset((string) (isset($segment->target) ? $segment->target : $source), $encoding);
$catalogue->set((string) $source, $target, $domain);
$metadata = array();
if (isset($segment->target) && $segment->target->attributes()) {
$metadata['target-attributes'] = array();
foreach ($segment->target->attributes() as $key => $value) {
$metadata['target-attributes'][$key] = (string) $value;
}
}
$catalogue->setMetadata((string) $source, $metadata, $domain);
}
}
/**
* Convert a UTF8 string to the specified encoding.
*
* @param string $content String to decode
* @param string $encoding Target encoding
*
* @return string
*/
private function utf8ToCharset($content, $encoding = null)
{
if ('UTF-8' !== $encoding && !empty($encoding)) {
return mb_convert_encoding($content, $encoding, 'UTF-8');
}
return $content;
}
/**
* Validates and parses the given file into a DOMDocument.
*
* @param string $file
* @param \DOMDocument $dom
* @param string $schema source of the schema
*
* @throws InvalidResourceException
*/
private function validateSchema($file, \DOMDocument $dom, $schema)
{
$internalErrors = libxml_use_internal_errors(true);
$disableEntities = libxml_disable_entity_loader(false);
if (!@$dom->schemaValidateSource($schema)) {
libxml_disable_entity_loader($disableEntities);
throw new InvalidResourceException(sprintf('Invalid resource provided: "%s"; Errors: %s', $file, implode("\n", $this->getXmlErrors($internalErrors))));
}
libxml_disable_entity_loader($disableEntities);
$dom->normalizeDocument();
libxml_clear_errors();
libxml_use_internal_errors($internalErrors);
}
private function getSchema($xliffVersion)
{
if ('1.2' === $xliffVersion) {
$schemaSource = file_get_contents(__DIR__.'/schema/dic/xliff-core/xliff-core-1.2-strict.xsd');
$xmlUri = 'http://www.w3.org/2001/xml.xsd';
} elseif ('2.0' === $xliffVersion) {
$schemaSource = file_get_contents(__DIR__.'/schema/dic/xliff-core/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 $this->fixXmlLocation($schemaSource, $xmlUri);
}
/**
* Internally changes the URI of a dependent xsd to be loaded locally.
*
* @param string $schemaSource Current content of schema file
* @param string $xmlUri External URI of XML to convert to local
*
* @return string
*/
private function fixXmlLocation($schemaSource, $xmlUri)
{
$newPath = str_replace('\\', '/', __DIR__).'/schema/dic/xliff-core/xml.xsd';
$parts = explode('/', $newPath);
if (0 === stripos($newPath, 'phar://')) {
$tmpfile = tempnam(sys_get_temp_dir(), 'sf2');
if ($tmpfile) {
copy($newPath, $tmpfile);
$parts = explode('/', str_replace('\\', '/', $tmpfile));
}
}
$drive = '\\' === DIRECTORY_SEPARATOR ? array_shift($parts).'/' : '';
$newPath = 'file:///'.$drive.implode('/', array_map('rawurlencode', $parts));
return str_replace($xmlUri, $newPath, $schemaSource);
}
/**
* Returns the XML errors of the internal XML parser.
*
* @param bool $internalErrors
*
* @return array An array of errors
*/
private function getXmlErrors($internalErrors)
{
$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 ?: 'n/a',
$error->line,
$error->column
);
}
libxml_clear_errors();
libxml_use_internal_errors($internalErrors);
return $errors;
}
/**
* Gets xliff file version based on the root "version" attribute.
* Defaults to 1.2 for backwards compatibility.
*
* @param \DOMDocument $dom
*
* @throws \InvalidArgumentException
*
* @return string
*/
private function getVersionNumber(\DOMDocument $dom)
{
/** @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 (substr_compare('urn:oasis:names:tc:xliff:document:', $namespace->nodeValue, 0, 34) !== 0) {
throw new \InvalidArgumentException(sprintf('Not a valid XLIFF namespace "%s"', $namespace));
}
return substr($namespace, 34);
}
}
// Falls back to v1.2
return '1.2';
}
/*
* @param \SimpleXMLElement|null $noteElement
* @param string|null $encoding
*
* @return array
*/
private function parseNotesMetadata(\SimpleXMLElement $noteElement = null, $encoding = null)
{
$notes = array();
if (null === $noteElement) {
return $notes;
}
foreach ($noteElement as $xmlNote) {
$noteAttributes = $xmlNote->attributes();
$note = array('content' => $this->utf8ToCharset((string) $xmlNote, $encoding));
if (isset($noteAttributes['priority'])) {
$note['priority'] = (int) $noteAttributes['priority'];
}
if (isset($noteAttributes['from'])) {
$note['from'] = (string) $noteAttributes['from'];
}
$notes[] = $note;
}
return $notes;
}
}
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