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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\Translation\Exception\InvalidArgumentException;
- 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) $value;
- }
- }
- if (isset($attributes['id'])) {
- $metadata['id'] = (string) $attributes['id'];
- }
- $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;
- }
- /** @var \SimpleXMLElement $xmlNote */
- foreach ($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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