Renderer.php

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<?php
namespace TYPO3\CMS\Core\Tests\Functional\Framework\Frontend;

/*
 * 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!
 */

class Renderer implements \TYPO3\CMS\Core\SingletonInterface
{
    protected $sections = [];

    public $cObj;

    public function parseValues($content, array $configuration = null)
    {
        if (empty($content)) {
            return;
        }

        $values = json_decode($content, true);

        if (empty($values) || !is_array($values)) {
            return;
        }

        $asPrefix = (!empty($configuration['as']) ? $configuration['as'] . ':' : null);
        foreach ($values as $identifier => $structure) {
            $parser = $this->createParser();
            $parser->parse($structure);

            $section = [
                'structure' => $structure,
                'structurePaths' => $parser->getPaths(),
                'records' => $parser->getRecords(),
            ];

            $this->addSection($section, $asPrefix . $identifier);
        }
    }

    public function renderValues($content, array $configuration = null)
    {
        if (empty($configuration['values.'])) {
            return;
        }

        $as = (!empty($configuration['as']) ? $configuration['as'] : null);
        $this->addSection($this->stdWrapValues($configuration['values.']), $as);
    }

    public function addSection(array $section, $as = null)
    {
        if (!empty($as)) {
            $this->sections[$as] = $section;
        } else {
            $this->sections[] = $section;
        }
    }

    public function renderSections($content, array $configuration = null)
    {
        $content = json_encode($this->sections);
        return $content;
    }

    protected function stdWrapValues(array $values)
    {
        $renderedValues = [];

        foreach ($values as $propertyName => $propertyInstruction)
        {
            $plainPropertyName = rtrim($propertyName, '.');
            if (!empty($propertyInstruction['children.'])) {
                $renderedValues[$plainPropertyName] = $this->stdWrapValues(
                    $propertyInstruction['children.']
                );
            } else {
                $renderedValues[$plainPropertyName] = $this->cObj->stdWrap(
                    '',
                    $propertyInstruction
                );
            }
        }

        return $renderedValues;
    }

    protected function createParser()
    {
        return \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
            \TYPO3\CMS\Core\Tests\Functional\Framework\Frontend\Parser::class
        );
    }
}