DigiComp.FluidCurrentControllerExpression/Classes/CurrentControllerExpressionNode.php

<?php

declare(strict_types=1);

namespace DigiComp\FluidCurrentControllerExpression;

use Neos\FluidAdaptor\Core\Rendering\RenderingContext;
use Neos\Utility\ObjectAccess;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\AbstractExpressionNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\ExpressionNodeInterface;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;

class CurrentControllerExpressionNode extends AbstractExpressionNode implements ExpressionNodeInterface
{
    /**
     * note: this could be readonly in PHP8
     * @var string
     */
    public static string $detectionExpression = '/\{#currentController\.([a-zA-Z0-9\.]+)\}/';

    public static function evaluateExpression(RenderingContextInterface $renderingContext, $expression, array $matches)
    {
        if ($renderingContext instanceof RenderingContext) {
            $propertyToReturn = $matches[1];
            if (
                \in_array(
                    $propertyToReturn,
                    ['actionName', 'name', 'objectName', 'packageKey', 'subpackageKey'],
                    true
                )
            ) {
                $propertyToReturn = 'controller' . \ucfirst($propertyToReturn);
            }
            return ObjectAccess::getPropertyPath(
                $renderingContext->getControllerContext()->getRequest(),
                $propertyToReturn
            );
        }
        return '';
    }
}