Script.php

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<?php

namespace Rsi\Fred\Minify\Handler;

class Script extends \Rsi\Fred\Minify\Handler{

  protected $_java = null;
  protected $_jar = null;
  protected $_url = 'https://closure-compiler.appspot.com/compile?compilation_level=SIMPLE_OPTIMIZATIONS&output_format=json&warning_level=verbose&output_info=compiled_code&output_info=errors&output_info=warnings';
  protected $_ignore = []; //!< Regex's for compiler messages to ignore

  protected function local($script,$filename = null){
    if(!$this->_java || !$this->_jar) return false;
    $source = \Rsi\File::tempFile('js',$script);
    $target = \Rsi\File::tempFile('js');
    exec("{$this->_java} -jar {$this->_jar} --js $source --js_output_file $target");
    $result = file_get_contents($target);
    unlink($source);
    unlink($target);
    return $result;
  }

  protected function service($script,$filename = null){
    $ch = curl_init($this->_url);
    curl_setopt($ch,CURLOPT_POSTFIELDS,'js_code=' . urlencode($script));
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    $response = curl_exec($ch);
    curl_close($ch);
    if($response){
      if($data = json_decode($response)){
        foreach(['error' => \Rsi\Fred\Log::ERROR,'warning' => \Rsi\Fred\Log::NOTICE] as $key => $prio)
          if(property_exists($data,$property = $key . 's')) foreach($data->$property as $message){
            foreach($this->_ignore as $ignore) if(preg_match($ignore,$message->$key)) continue 2;
            $this->_minify->log->add($prio,"Script $key: {$message->$key}",$filename,$message->lineno,(array)$message);
          }
        return $data->compiledCode;
      }
      else $this->_minify->log->error('Invalid response',__FILE__,__LINE__,['response' => $response,'error' => json_last_error_msg()]);
    }
    else $this->_minify->log->error('No response',__FILE__,__LINE__,['url' => $this->_url]);
    return false;
  }

  public function source($source,$filename = null){
    try{
      return ($this->local($source,$filename) ?: $this->service($source,$filename)) ?: $source;
    }
    catch(\Exception $e){
      $this->_minify->log->error('Error while minimizing script: ' . $e->getMessage(),__FILE__,__LINE__);
      return $source;
    }
  }

}