Xliff translation updated

SynchronizeTranslationsCommand.php

<?php

namespace Liip\CoreBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Translation\Loader\LoaderInterface;
use Symfony\Component\Finder\Finder;
use Symfony\Component\Translation\MessageCatalogue;
use Symfony\Component\Translation\Loader\XliffFileLoader;
use Symfony\Component\Translation\Dumper\XliffFileDumper;

class SynchronizeTranslationsCommand extends ContainerAwareCommand
{
    /**
     * @var LoaderInterface
     */
    private $loader;

    private $path;

    protected function configure()
    {
        $this
            ->setName('liip:trans:sync')
            ->setDescription('Synchronize translation files between languages')
        ;
    }

    protected function initialize(InputInterface $input, OutputInterface $output)
    {
        $this->loader = new XliffFileLoader;
        $this->path = 'app/Resources/translations';
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $finder = Finder::create()->name('*.en.xliff')->in($this->path);

        foreach($finder as $filename) {
            $this->synchronize($filename->getRealpath(), $output);
        }
    }

    protected function synchronize($filename, OutputInterface $output)
    {
        $matches = array();
        preg_match('#^.*/(.*)\.en\.xliff$#', $filename, $matches);
        $domain = $matches[1];
        $filefr = preg_replace('#\.en\.xliff$#', '.fr.xliff', $filename);

        $output->write("Updating $filename...");

        $caten = $this->loader->load($filename, 'en', $domain);

        if (file_exists($filefr)) {
            $catfr = $this->loader->load($filefr, 'fr', $domain);
        } else {
            $catfr = new MessageCatalogue('fr');
        }

        $modified = false;
        foreach ($caten->all($domain) as $key => $value) {
            if (! $catfr->has($key, $domain)) {
                $catfr->set($key, "TODO: $value", $domain);
                $modified = true;
            }
        }

        if ($modified) {
            $dumper = new XliffFileDumper();
            $dumper->dump($catfr, array('path' => $this->path));
            // the dumper has a hardcoded xlf extension, rename the file to xliff
            rename($this->path . '/' . $domain . '.fr.xlf', $this->path . '/' . $domain . '.fr.xliff');
            $output->write(" - UPDATED - ");
        }
        $output->write("done", true);
    }
}