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<?php

namespace Gettext\Extractors;

use Gettext\Translations;
use Gettext\Translation;
use SimpleXMLElement;

/**
 * Class to get gettext strings from xliff format.
 */
class Xliff extends Extractor implements ExtractorInterface
{
    /**
     * {@inheritdoc}
     */
    public static function fromString($string, Translations $translations, array $options = [])
    {
        $xml = new SimpleXMLElement($string, null, false);

foreach ($xml->file as $file) {
            if (isset($file->notes)) {
                foreach ($file->notes->note as $note) {
                    $translations->setHeader($note['id'], (string) $note);
                }
            }

foreach ($file->unit as $unit) {
                foreach ($unit->segment as $segment) {
                    $targets = [];

foreach ($segment->target as $target) {
                        $targets[] = (string) $target;
                    }

$translation = new Translation(null, (string) $segment->source);
                    $translation->setTranslation(array_shift($targets));
                    $translation->setPluralTranslations($targets);

if (isset($unit->notes)) {
                        foreach ($unit->notes->note as $note) {
                            switch ($note['category']) {
                                case 'context':
                                    $translation = $translation->getClone((string) $note);
                                    break;

case 'extracted-comment':
                                    $translation->addExtractedComment((string) $note);
                                    break;

case 'flag':
                                    $translation->addFlag((string) $note);
                                    break;

case 'reference':
                                    $ref = explode(':', (string) $note, 2);
                                    $translation->addReference($ref[0], isset($ref[1]) ? $ref[1] : null);
                                    break;

default:
                                    $translation->addComment((string) $note);
                                    break;
                            }
                        }
                    }

$translations[] = $translation;
                }
            }
        }
    }
}