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   1  <?php
   2  
   3  /*
   4  * @package   s9e\TextFormatter
   5  * @copyright Copyright (c) 2010-2019 The s9e Authors
   6  * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
   7  */
   8  namespace s9e\TextFormatter\Configurator\JavaScript;
   9  use Exception;
  10  abstract class Minifier
  11  {
  12      public $cacheDir;
  13      public $keepGoing = \false;
  14      abstract public function minify($src);
  15  	public function get($src)
  16      {
  17          try
  18          {
  19              return (isset($this->cacheDir)) ? $this->getFromCache($src) : $this->minify($src);
  20          }
  21          catch (Exception $e)
  22          {
  23              if (!$this->keepGoing)
  24                  throw $e;
  25          }
  26          return $src;
  27      }
  28  	public function getCacheDifferentiator()
  29      {
  30          return '';
  31      }
  32  	protected function getFromCache($src)
  33      {
  34          $differentiator = $this->getCacheDifferentiator();
  35          $key            = \sha1(\serialize([\get_class($this), $differentiator, $src]));
  36          $cacheFile      = $this->cacheDir . '/minifier.' . $key . '.js';
  37          if (!\file_exists($cacheFile))
  38              \file_put_contents($cacheFile, $this->minify($src));
  39          return \file_get_contents($cacheFile);
  40      }
  41  }