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   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  namespace Twig\Util;
  13  
  14  use Twig\Environment;
  15  use Twig\Error\SyntaxError;
  16  use Twig\Source;
  17  
  18  /**
  19   * @author Fabien Potencier <fabien@symfony.com>
  20   */
  21  final class DeprecationCollector
  22  {
  23      private $twig;
  24  
  25      public function __construct(Environment $twig)
  26      {
  27          $this->twig = $twig;
  28      }
  29  
  30      /**
  31       * Returns deprecations for templates contained in a directory.
  32       *
  33       * @param string $dir A directory where templates are stored
  34       * @param string $ext Limit the loaded templates by extension
  35       *
  36       * @return array An array of deprecations
  37       */
  38      public function collectDir($dir, $ext = '.twig')
  39      {
  40          $iterator = new \RegexIterator(
  41              new \RecursiveIteratorIterator(
  42                  new \RecursiveDirectoryIterator($dir), \RecursiveIteratorIterator::LEAVES_ONLY
  43              ), '{'.preg_quote($ext).'$}'
  44          );
  45  
  46          return $this->collect(new TemplateDirIterator($iterator));
  47      }
  48  
  49      /**
  50       * Returns deprecations for passed templates.
  51       *
  52       * @param \Traversable $iterator An iterator of templates (where keys are template names and values the contents of the template)
  53       *
  54       * @return array An array of deprecations
  55       */
  56      public function collect(\Traversable $iterator)
  57      {
  58          $deprecations = [];
  59          set_error_handler(function ($type, $msg) use (&$deprecations) {
  60              if (E_USER_DEPRECATED === $type) {
  61                  $deprecations[] = $msg;
  62              }
  63          });
  64  
  65          foreach ($iterator as $name => $contents) {
  66              try {
  67                  $this->twig->parse($this->twig->tokenize(new Source($contents, $name)));
  68              } catch (SyntaxError $e) {
  69                  // ignore templates containing syntax errors
  70              }
  71          }
  72  
  73          restore_error_handler();
  74  
  75          return $deprecations;
  76      }
  77  }
  78  
  79  class_alias('Twig\Util\DeprecationCollector', 'Twig_Util_DeprecationCollector');