IncludeTreeSetupConditionConstantSubstitutionVisitor.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Core\TypoScript\IncludeTree\Visitor;
 
use ‪TYPO3\CMS\Core\TypoScript\IncludeTree\IncludeNode\IncludeConditionInterface;
use ‪TYPO3\CMS\Core\TypoScript\IncludeTree\IncludeNode\IncludeInterface;
use ‪TYPO3\CMS\Core\TypoScript\Tokenizer\Token\Token;
use ‪TYPO3\CMS\Core\TypoScript\Tokenizer\Token\TokenType;
 
final class ‪IncludeTreeSetupConditionConstantSubstitutionVisitor implements ‪IncludeTreeVisitorInterface
{
    private array ‪$flattenedConstants;
 
    public function ‪setFlattenedConstants(array ‪$flattenedConstants): void
    {
        $this->flattenedConstants = ‪$flattenedConstants;
    }
 
    public function ‪visitBeforeChildren(‪IncludeInterface $include, int $currentDepth): void
    {
        if (!$include instanceof ‪IncludeConditionInterface) {
            return;
        }
        $conditionToken = $include->getConditionToken();
        $conditionValue = $conditionToken->getValue();
        ‪$flattenedConstants = ‪$this->flattenedConstants;
        $hadSubstitution = false;
        $newConditionValue = preg_replace_callback(
            '/{\$(.[^}]*)}/',
            static function ($match) use (‪$flattenedConstants, &$hadSubstitution) {
                // Replace {$someConstant} if found, else leave unchanged
                if (array_key_exists($match[1], ‪$flattenedConstants)) {
                    $hadSubstitution = true;
                    return ‪$flattenedConstants[$match[1]];
                }
                return $match[0];
            },
            $conditionValue
        );
        if ($hadSubstitution) {
            $include->setOriginalConditionToken($conditionToken);
            $include->setConditionToken(new ‪Token(TokenType::T_VALUE, $newConditionValue, $conditionToken->getLine(), $conditionToken->getColumn()));
        }
    }
 
    public function ‪visit(‪IncludeInterface $include, int $currentDepth): void
    {
        // Noop, just implement interface
    }
}