Resolver.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\ExpressionLanguage;
 
use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪Resolver
{
    private ExpressionLanguage ‪$expressionLanguage;
    private array ‪$expressionLanguageVariables;
 
    public function ‪__construct(string $context, array $variables)
    {
        $functionProviderInstances = [];
        // @todo: The entire ProviderConfigurationLoader approach should fall and
        //        substituted with a symfony service provider strategy in v13.
        //        Also, the magic "DefaultProvider" approach should fall at this time,
        //        default functions and variable providers should be provided explicitly
        //        by config.
        //        The entire construct should be reviewed at this point and most likely
        //        declared final as well.
        $providers = GeneralUtility::makeInstance(ProviderConfigurationLoader::class)->getExpressionLanguageProviders()[$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 $expression, array $contextVariables = []): mixed
    {
        return $this->expressionLanguage->evaluate($expression, array_replace($this->expressionLanguageVariables, $contextVariables));
    }
 
    public function ‪compile(string $condition): string
    {
        return $this->expressionLanguage->compile($condition, array_keys($this->expressionLanguageVariables));
    }
}