AbstractFormViewHelper.php

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<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Form;

/*                                                                        *
 * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

abstract class AbstractFormViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper {

    protected $persistenceManager;

    protected function prefixFieldName($fieldName) {
        if ($fieldName === NULL || $fieldName === '') {
            return '';
        }
        if (!$this->viewHelperVariableContainer->exists('TYPO3\\CMS\\Fluid\\ViewHelpers\\FormViewHelper', 'fieldNamePrefix')) {
            return $fieldName;
        }
        $fieldNamePrefix = (string) $this->viewHelperVariableContainer->get('TYPO3\\CMS\\Fluid\\ViewHelpers\\FormViewHelper', 'fieldNamePrefix');
        if ($fieldNamePrefix === '') {
            return $fieldName;
        }
        $fieldNameSegments = explode('[', $fieldName, 2);
        $fieldName = $fieldNamePrefix . '[' . $fieldNameSegments[0] . ']';
        if (count($fieldNameSegments) > 1) {
            $fieldName .= '[' . $fieldNameSegments[1];
        }
        return $fieldName;
    }

    protected function renderHiddenIdentityField($object, $name) {
        if ($object instanceof \TYPO3\CMS\Extbase\Persistence\Generic\LazyLoadingProxy) {
            $object = $object->_loadRealInstance();
        }
        if (!is_object($object)
            || !($object instanceof \TYPO3\CMS\Extbase\DomainObject\AbstractDomainObject)
            || ($object->_isNew() && !$object->_isClone())) {
            return '';
        }
        // Intentionally NOT using PersistenceManager::getIdentifierByObject here!!
        // Using that one breaks re-submission of data in forms in case of an error.
        $identifier = $object->getUid();
        if ($identifier === NULL) {
            return chr(10) . '<!-- Object of type ' . get_class($object) . ' is without identity -->' . chr(10);
        }
        $name = $this->prefixFieldName($name) . '[__identity]';
        $this->registerFieldNameForFormTokenGeneration($name);

        return chr(10) . '<input type="hidden" name="'. $name . '" value="' . $identifier .'" />' . chr(10);
    }

    protected function registerFieldNameForFormTokenGeneration($fieldName) {
        if ($this->viewHelperVariableContainer->exists('TYPO3\\CMS\\Fluid\\ViewHelpers\\FormViewHelper', 'formFieldNames')) {
            $formFieldNames = $this->viewHelperVariableContainer->get('TYPO3\\CMS\\Fluid\\ViewHelpers\\FormViewHelper', 'formFieldNames');
        } else {
            $formFieldNames = array();
        }
        $formFieldNames[] = $fieldName;
        $this->viewHelperVariableContainer->addOrUpdate('TYPO3\\CMS\\Fluid\\ViewHelpers\\FormViewHelper', 'formFieldNames', $formFieldNames);
    }
}