TypoScriptToJsonConverter.php

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<?php
namespace TYPO3\CMS\Form\Utility;

class TypoScriptToJsonConverter {

    protected $validationRules;

    public function convert(array $typoscript) {
        $this->setValidationRules($typoscript);
        $jsonObject = $this->createElement('form', $typoscript);
        return $jsonObject;
    }

    public function createElement($class, array $arguments = array()) {
        $class = strtolower((string) $class);
        $className = 'TYPO3\\CMS\\Form\\Domain\\Model\Json\\' . ucfirst($class) . 'JsonElement';

        if (!class_exists($className)) {
            throw new \RuntimeException('Class "' . $className . '" does not exist', 1440779351);
        }

        $this->addValidationRules($arguments);
        $object = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance($className);
        $object->setParameters($arguments);
        if ($object->childElementsAllowed()) {
            $this->getChildElementsByIntegerKey($object, $arguments);
        }
        return $object;
    }

    protected function getChildElementsByIntegerKey(\TYPO3\CMS\Form\Domain\Model\Json\AbstractJsonElement $parentElement, array $typoscript) {
        if (is_array($typoscript)) {
            $keys = \TYPO3\CMS\Core\TypoScript\TemplateService::sortedKeyList($typoscript);
            foreach ($keys as $key) {
                $class = $typoscript[$key];
                if ((int)$key && strpos($key, '.') === FALSE) {
                    if (isset($typoscript[$key . '.'])) {
                        $elementArguments = $typoscript[$key . '.'];
                    } else {
                        $elementArguments = array();
                    }
                    $this->setElementType($parentElement, $class, $elementArguments);
                }
            }
        }
    }

    private function setElementType(\TYPO3\CMS\Form\Domain\Model\Json\AbstractJsonElement $parentElement, $class, array $arguments) {
        if (in_array($class, \TYPO3\CMS\Form\Utility\FormUtility::getInstance()->getFormObjects())) {
            if (strstr($arguments['class'], 'predefined-name')) {
                $class = 'NAME';
            }
            $this->addElement($parentElement, $class, $arguments);
        }
    }

    public function addElement(\TYPO3\CMS\Form\Domain\Model\Json\AbstractJsonElement $parentElement, $class, array $arguments) {
        try {
            $element = $this->createElement($class, $arguments);
            $parentElement->addElement($element);
        } catch (\RuntimeException $exception) {
            // Catch missing classes or element types
            // There are elements that can be used the
            // TypoScript-like declaration, which don't
            // have a counterpart in the ExtJS wizard.
        }
    }

    protected function setValidationRules(array $typoscript) {
        if (isset($typoscript['rules.']) && is_array($typoscript['rules.'])) {
            $this->validationRules = $typoscript['rules.'];
        }
    }

    protected function addValidationRules(array &$arguments) {
        $validationRulesAvailable = FALSE;
        if (!empty($this->validationRules) && isset($arguments['name'])) {
            foreach ($this->validationRules as $key => $ruleName) {
                if ((int)$key && strpos($key, '.') === FALSE) {
                    if (isset($this->validationRules[$key . '.'])) {
                        $ruleConfiguration = $this->validationRules[$key . '.'];
                        if (isset($ruleConfiguration['element']) && $ruleConfiguration['element'] === $arguments['name']) {
                            $arguments['validation'][$ruleName] = $ruleConfiguration;
                        }
                    }
                }
            }
        }
    }

}