<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Format\Json;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

use FluidTYPO3\Vhs\Utility\ErrorUtility;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithContentArgumentAndRenderStatic;

/**
 * Converts the JSON encoded argument into a PHP variable.
 */
class DecodeViewHelper extends AbstractViewHelper
{
    use CompileWithContentArgumentAndRenderStatic;

    public function initializeArguments(): void
    {
        $this->registerArgument('json', 'string', 'JSON string to decode');
    }

    /**
     * @return mixed
     */
    public static function renderStatic(
        array $arguments,
        \Closure $renderChildrenClosure,
        RenderingContextInterface $renderingContext
    ) {
        $json = $renderChildrenClosure();
        if (empty($json)) {
            return null;
        }
        $value = json_decode($json, true);

        if (JSON_ERROR_NONE !== json_last_error()) {
            ErrorUtility::throwViewHelperException('The provided argument is invalid JSON.', 1358440054);
        }

        return $value;
    }
}