vendor/shopware/core/Framework/Adapter/Twig/TwigVariableParser.php line 29

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  1. <?php declare(strict_types=1);
  3. namespace Shopware\Core\Framework\Adapter\Twig;
  5. use Twig\Environment;
  6. use Twig\Loader\ArrayLoader;
  7. use Twig\Node\Expression\AssignNameExpression;
  8. use Twig\Node\Expression\ConstantExpression;
  9. use Twig\Node\Expression\GetAttrExpression;
  10. use Twig\Node\Expression\NameExpression;
  11. use Twig\Node\ForNode;
  12. use Twig\Node\Node;
  14. /**
  15.  * @package core
  16.  */
  17. class TwigVariableParser
  18. {
  19.     private Environment $twig;
  21.     /**
  22.      * @internal
  23.      */
  24.     public function __construct(Environment $twig)
  25.     {
  26.         $this->twig = $twig;
  27.     }
  29.     public function parse(string $template): array
  30.     {
  31.         $loader = new ArrayLoader(['content.html.twig' => $template]);
  33.         $source = $loader->getSourceContext('content.html.twig');
  35.         $stream = $this->twig->tokenize($source);
  37.         $parsed = $this->twig->parse($stream);
  39.         return array_values($this->getVariables($parsed));
  40.     }
  42.     private function getVariables(iterable $nodes, array $aliases = []): array
  43.     {
  44.         $variables = [];
  45.         foreach ($nodes as $node) {
  46.             if ($node instanceof AssignNameExpression) {
  47.                 continue;
  48.             }
  50.             if ($node instanceof NameExpression) {
  51.                 $name = $node->getAttribute('name');
  53.                 if (isset($aliases[$name])) {
  54.                     $name = $aliases[$name];
  55.                 }
  57.                 $variables[$name] = $name;
  59.                 continue;
  60.             }
  62.             if ($node instanceof ConstantExpression && $nodes instanceof GetAttrExpression) {
  63.                 $value = $node->getAttribute('value');
  64.                 if (!empty($value) && \is_string($value)) {
  65.                     $variables[$value] = $value;
  66.                 }
  68.                 continue;
  69.             }
  71.             if ($node instanceof GetAttrExpression) {
  72.                 $path = implode('.', $this->getVariables($node, $aliases));
  73.                 if (!empty($path)) {
  74.                     $variables[$path] = $path;
  75.                 }
  77.                 continue;
  78.             }
  80.             if ($node instanceof ForNode) {
  81.                 $target = implode('.', $this->getVariables($node->getNode('seq'), $aliases));
  82.                 $source = $node->getNode('value_target')->getAttribute('name');
  84.                 $aliases[$source] = $target;
  85.             }
  87.             if ($node instanceof Node) {
  88.                 $variables += $this->getVariables($node, $aliases);
  89.             }
  90.         }
  92.         return $variables;
  93.     }
  94. }