vendor/shopware/core/Framework/Adapter/Twig/TwigVariableParser.php line 34

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  1. <?php declare(strict_types=1);
  3. namespace Shopware\Core\Framework\Adapter\Twig;
  5. use Shopware\Core\Framework\Log\Package;
  6. use Twig\Environment;
  7. use Twig\Loader\ArrayLoader;
  8. use Twig\Node\Expression\AssignNameExpression;
  9. use Twig\Node\Expression\ConstantExpression;
  10. use Twig\Node\Expression\GetAttrExpression;
  11. use Twig\Node\Expression\NameExpression;
  12. use Twig\Node\ForNode;
  13. use Twig\Node\Node;
  15. #[Package('core')]
  16. class TwigVariableParser
  17. {
  18.     private Environment $twig;
  20.     /**
  21.      * @internal
  22.      */
  23.     public function __construct(Environment $twig)
  24.     {
  25.         $this->twig = $twig;
  26.     }
  28.     public function parse(string $template): array
  29.     {
  30.         $loader = new ArrayLoader(['content.html.twig' => $template]);
  32.         $source = $loader->getSourceContext('content.html.twig');
  34.         $stream = $this->twig->tokenize($source);
  36.         $parsed = $this->twig->parse($stream);
  38.         return array_values($this->getVariables($parsed));
  39.     }
  41.     private function getVariables(iterable $nodes, array $aliases = []): array
  42.     {
  43.         $variables = [];
  44.         foreach ($nodes as $node) {
  45.             if ($node instanceof AssignNameExpression) {
  46.                 continue;
  47.             }
  49.             if ($node instanceof NameExpression) {
  50.                 $name = $node->getAttribute('name');
  52.                 if (isset($aliases[$name])) {
  53.                     $name = $aliases[$name];
  54.                 }
  56.                 $variables[$name] = $name;
  58.                 continue;
  59.             }
  61.             if ($node instanceof ConstantExpression && $nodes instanceof GetAttrExpression) {
  62.                 $value = $node->getAttribute('value');
  63.                 if (!empty($value) && \is_string($value)) {
  64.                     $variables[$value] = $value;
  65.                 }
  67.                 continue;
  68.             }
  70.             if ($node instanceof GetAttrExpression) {
  71.                 $path = implode('.', $this->getVariables($node, $aliases));
  72.                 if (!empty($path)) {
  73.                     $variables[$path] = $path;
  74.                 }
  76.                 continue;
  77.             }
  79.             if ($node instanceof ForNode) {
  80.                 $target = implode('.', $this->getVariables($node->getNode('seq'), $aliases));
  81.                 $source = $node->getNode('value_target')->getAttribute('name');
  83.                 $aliases[$source] = $target;
  84.             }
  86.             if ($node instanceof Node) {
  87.                 $variables += $this->getVariables($node, $aliases);
  88.             }
  89.         }
  91.         return $variables;
  92.     }
  93. }