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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\Resource\FileResource;
use Symfony\Component\Config\Util\Exception\InvalidXmlException;
use Symfony\Component\Config\Util\Exception\XmlParsingException;
use Symfony\Component\Config\Util\XmlUtils;
use Symfony\Component\Translation\Exception\InvalidResourceException;
use Symfony\Component\Translation\Exception\NotFoundResourceException;
use Symfony\Component\Translation\Exception\RuntimeException;
use Symfony\Component\Translation\MessageCatalogue;
use Symfony\Component\Translation\Util\XliffUtils;
/**
* XliffFileLoader loads translations from XLIFF files.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class XliffFileLoader implements LoaderInterface
{
/**
* {@inheritdoc}
*/
public function load($resource, string $locale, string $domain = 'messages')
{
if (!class_exists(XmlUtils::class)) {
throw new RuntimeException('Loading translations from the Xliff format requires the Symfony Config component.');
}
if (!$this->isXmlString($resource)) {
if (!stream_is_local($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.', $resource));
}
if (!is_file($resource)) {
throw new InvalidResourceException(sprintf('This is neither a file nor an XLIFF string "%s".', $resource));
}
}
try {
if ($this->isXmlString($resource)) {
$dom = XmlUtils::parse($resource);
} else {
$dom = XmlUtils::loadFile($resource);
}
} catch (\InvalidArgumentException|XmlParsingException|InvalidXmlException $e) {
throw new InvalidResourceException(sprintf('Unable to load "%s": ', $resource).$e->getMessage(), $e->getCode(), $e);
}
if ($errors = XliffUtils::validateSchema($dom)) {
throw new InvalidResourceException(sprintf('Invalid resource provided: "%s"; Errors: ', $resource).XliffUtils::getErrorsAsString($errors));
}
$catalogue = new MessageCatalogue($locale);
$this->extract($dom, $catalogue, $domain);
if (is_file($resource) && class_exists(FileResource::class)) {
$catalogue->addResource(new FileResource($resource));
}
return $catalogue;
}
private function extract(\DOMDocument $dom, MessageCatalogue $catalogue, string $domain)
{
$xliffVersion = XliffUtils::getVersionNumber($dom);
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.
*/
private function extractXliff1(\DOMDocument $dom, MessageCatalogue $catalogue, string $domain)
{
$xml = simplexml_import_dom($dom);
$encoding = $dom->encoding ? strtoupper($dom->encoding) : null;
$namespace = 'urn:oasis:names:tc:xliff:document:1.2';
$xml->registerXPathNamespace('xliff', $namespace);
foreach ($xml->xpath('//xliff:file') as $file) {
$fileAttributes = $file->attributes();
$file->registerXPathNamespace('xliff', $namespace);
foreach ($file->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 = $this->utf8ToCharset((string) ($translation->target ?? $translation->source), $encoding);
$catalogue->set((string) $source, $target, $domain);
$metadata = [
'source' => (string) $translation->source,
'file' => [
'original' => (string) $fileAttributes['original'],
],
];
if ($notes = $this->parseNotesMetadata($translation->note, $encoding)) {
$metadata['notes'] = $notes;
}
if (isset($translation->target) && $translation->target->attributes()) {
$metadata['target-attributes'] = [];
foreach ($translation->target->attributes() as $key => $value) {
$metadata['target-attributes'][$key] = (string) $value;
}
}
if (isset($attributes['id'])) {
$metadata['id'] = (string) $attributes['id'];
}
$catalogue->setMetadata((string) $source, $metadata, $domain);
}
}
}
private function extractXliff2(\DOMDocument $dom, MessageCatalogue $catalogue, string $domain)
{
$xml = simplexml_import_dom($dom);
$encoding = $dom->encoding ? strtoupper($dom->encoding) : null;
$xml->registerXPathNamespace('xliff', 'urn:oasis:names:tc:xliff:document:2.0');
foreach ($xml->xpath('//xliff:unit') as $unit) {
foreach ($unit->segment as $segment) {
$attributes = $unit->attributes();
$source = $attributes['name'] ?? $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 = $this->utf8ToCharset((string) ($segment->target ?? $segment->source), $encoding);
$catalogue->set((string) $source, $target, $domain);
$metadata = [];
if (isset($segment->target) && $segment->target->attributes()) {
$metadata['target-attributes'] = [];
foreach ($segment->target->attributes() as $key => $value) {
$metadata['target-attributes'][$key] = (string) $value;
}
}
if (isset($unit->notes)) {
$metadata['notes'] = [];
foreach ($unit->notes->note as $noteNode) {
$note = [];
foreach ($noteNode->attributes() as $key => $value) {
$note[$key] = (string) $value;
}
$note['content'] = (string) $noteNode;
$metadata['notes'][] = $note;
}
}
$catalogue->setMetadata((string) $source, $metadata, $domain);
}
}
}
/**
* Convert a UTF8 string to the specified encoding.
*/
private function utf8ToCharset(string $content, string $encoding = null): string
{
if ('UTF-8' !== $encoding && !empty($encoding)) {
return mb_convert_encoding($content, $encoding, 'UTF-8');
}
return $content;
}
private function parseNotesMetadata(\SimpleXMLElement $noteElement = null, string $encoding = null): array
{
$notes = [];
if (null === $noteElement) {
return $notes;
}
/** @var \SimpleXMLElement $xmlNote */
foreach ($noteElement as $xmlNote) {
$noteAttributes = $xmlNote->attributes();
$note = ['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;
}
private function isXmlString(string $resource): bool
{
return 0 === strpos($resource, '<?xml');
}
}
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