Script.php

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<?php
 
namespace Rsi\Fred\Minify\Handler;
 
use Rsi\Fred\Log;
 
class Script extends \Rsi\Fred\Minify\Handler{
 
  protected $_java = null; //!< Location of Java executable.
  protected $_jar = null; //!< Location of Closure Compiler jar file.
  protected $_url = 'http://mist.shitware.nl/tool/minify-js.php?key=********'; //!< URL for Closure Compiler service.
  protected $_ignore = []; //!< Regex's for compiler messages to ignore.
  protected $_levels = ['error' => Log::ERROR,'warning' => Log::NOTICE]; //!< Translation from compiler message levels to log
    // levels (defaults to Log::INFO).
 
  protected function processMessages($messages,$filename){
    foreach($messages as $message){
      foreach($this->_ignore as $ignore) if(($descr = $message['description'] ?? null) && preg_match($ignore,$descr)) continue 2;
      $prio = $this->_levels[$level = $message['level'] ?? null] ?? Log::INFO;
      $this->_minify->log->add($prio,"Script $level: $descr",$filename,$message['line'] ?? null,$message);
    }
  }
 
  protected function local($script,$filename = null){
    if(!$this->_java || !$this->_jar) return false;
    $source = \Rsi\File::tempFile('js',$script);
    $target = \Rsi\File::tempFile('js');
    $this->processMessages(json_decode(shell_exec("{$this->_java} -jar {$this->_jar} --js $source --language_out ECMASCRIPT_2015 --rewrite_polyfills=false --js_output_file $target --warning_level VERBOSE --error_format JSON 2>&1"),true) ?: [],$filename);
    $minified = file_get_contents($target);
    unlink($source);
    unlink($target);
    return $minified;
  }
 
  protected function service($script,$filename = null){
    $ch = curl_init($this->_url);
    curl_setopt($ch,CURLOPT_POSTFIELDS,$script);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    $response = curl_exec($ch);
    curl_close($ch);
    if($response){
      if($data = json_decode($response,true)){
        $this->processMessages($data['messages'] ?? [],$filename);
        return $data['minified'] ?? null;
      }
      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: ' . $e->getMessage(),$e->getFile(),$e->getLine());
      return $source;
    }
  }
 
}