Resolver.php

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<?php
declare(strict_types = 1);
namespace ‪TYPO3\CMS\Core\ExpressionLanguage;
 
/*
 * 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!
 */
 
use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪Resolver
{
    protected ‪$provider;
 
    protected ‪$expressionLanguage;
 
    public ‪$expressionLanguageVariables = [];
 
    public function ‪__construct(string $context, array $variables)
    {
        $functionProviderInstances = [];
        $providers = GeneralUtility::makeInstance(ProviderConfigurationLoader::class)->getExpressionLanguageProviders()[$context] ?? [];
        // Always add default provider
        array_unshift($providers, DefaultProvider::class);
        $providers = array_unique($providers);
        $functionProviders = [];
        $generalVariables = [];
        foreach ($providers as ‪$provider) {
            $providerInstance = GeneralUtility::makeInstance(‪$provider);
            $functionProviders[] = $providerInstance->getExpressionLanguageProviders();
            $generalVariables[] = $providerInstance->getExpressionLanguageVariables();
        }
        $functionProviders = array_merge(...$functionProviders);
        $generalVariables = array_replace_recursive(...$generalVariables);
        $this->expressionLanguageVariables = array_replace_recursive($generalVariables, $variables);
        foreach ($functionProviders as $functionProvider) {
            $functionProviderInstances[] = GeneralUtility::makeInstance($functionProvider);
        }
        $this->expressionLanguage = new ExpressionLanguage(null, $functionProviderInstances);
    }
 
    public function ‪evaluate(string $condition): bool
    {
        return (bool)$this->expressionLanguage->evaluate($condition, $this->expressionLanguageVariables);
    }
 
    public function ‪compile(string $condition): string
    {
        return (string)$this->expressionLanguage->compile($condition, array_keys($this->expressionLanguageVariables));
    }
}