Jpegoptim driver for npAssetsOptimizerPlugin for sf1

npDriverJpegoptim.class.php

<?php

class npDriverJpegoptim extends npDriverBase
{
  public function doProcessFile($file, $replace = false)
  {
    if (false === $replace)
    {
      throw new LogicException('JPEG optimization only support file replacement atm');
    }

    exec('which jpegoptim', $output, $return);

    if (!count($output) || $return > 0)
    {
      throw new RuntimeException('The jpegoptim program is not available nor accessible by php on your system');
    }

    $command = sprintf('jpegoptim --strip-all -m90 %s', escapeshellarg($file));

    exec($command, $output, $return);

    if ($return > 0)
    {
      throw new RuntimeException(sprintf("Error status code %d received while executing command: %s", $return, $command));
    }

    return $file;
  }
}