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DeprecationCollector.php (2205B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) Fabien Potencier
      7  *
      8  * For the full copyright and license information, please view the LICENSE
      9  * file that was distributed with this source code.
     10  */
     11 
     12 /**
     13  * @author Fabien Potencier <fabien@symfony.com>
     14  */
     15 class Twig_Util_DeprecationCollector
     16 {
     17     private $twig;
     18     private $deprecations;
     19 
     20     public function __construct(Twig_Environment $twig)
     21     {
     22         $this->twig = $twig;
     23     }
     24 
     25     /**
     26      * Returns deprecations for templates contained in a directory.
     27      *
     28      * @param string $dir A directory where templates are stored
     29      * @param string $ext Limit the loaded templates by extension
     30      *
     31      * @return array() An array of deprecations
     32      */
     33     public function collectDir($dir, $ext = '.twig')
     34     {
     35         $iterator = new RegexIterator(
     36             new RecursiveIteratorIterator(
     37                 new RecursiveDirectoryIterator($dir), RecursiveIteratorIterator::LEAVES_ONLY
     38             ), '{'.preg_quote($ext).'$}'
     39         );
     40 
     41         return $this->collect(new Twig_Util_TemplateDirIterator($iterator));
     42     }
     43 
     44     /**
     45      * Returns deprecations for passed templates.
     46      *
     47      * @param Iterator $iterator An iterator of templates (where keys are template names and values the contents of the template)
     48      *
     49      * @return array() An array of deprecations
     50      */
     51     public function collect(Iterator $iterator)
     52     {
     53         $this->deprecations = array();
     54 
     55         set_error_handler(array($this, 'errorHandler'));
     56 
     57         foreach ($iterator as $name => $contents) {
     58             try {
     59                 $this->twig->parse($this->twig->tokenize($contents, $name));
     60             } catch (Twig_Error_Syntax $e) {
     61                 // ignore templates containing syntax errors
     62             }
     63         }
     64 
     65         restore_error_handler();
     66 
     67         $deprecations = $this->deprecations;
     68         $this->deprecations = array();
     69 
     70         return $deprecations;
     71     }
     72 
     73     /**
     74      * @internal
     75      */
     76     public function errorHandler($type, $msg)
     77     {
     78         if (E_USER_DEPRECATED === $type) {
     79             $this->deprecations[] = $msg;
     80         }
     81     }
     82 }