AddController.php

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<?php
namespace TYPO3\CMS\Backend\Controller\Wizard;

/*
 * 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!
 */

use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
use TYPO3\CMS\Backend\Form\FormDataCompiler;
use TYPO3\CMS\Backend\Form\FormDataGroup\OnTheFly;
use TYPO3\CMS\Backend\Form\FormDataProvider\DatabaseEditRow;
use TYPO3\CMS\Backend\Utility\BackendUtility;
use TYPO3\CMS\Core\Configuration\FlexForm\FlexFormTools;
use TYPO3\CMS\Core\DataHandling\DataHandler;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Utility\HttpUtility;
use TYPO3\CMS\Core\Utility\MathUtility;

class AddController extends AbstractWizardController
{
    public $content;

    public $processDataFlag = 0;

    public $pid;

    public $table;

    public $id;

    public $P;

    public $returnEditConf;

    public function __construct()
    {
        parent::__construct();
        $this->getLanguageService()->includeLLFile('EXT:lang/locallang_wizards.xlf');
        $GLOBALS['SOBE'] = $this;

        $this->init();
    }

    protected function init()
    {
        // Init GPvars:
        $this->P = GeneralUtility::_GP('P');
        $this->returnEditConf = GeneralUtility::_GP('returnEditConf');
        // Get this record
        $record = BackendUtility::getRecord($this->P['table'], $this->P['uid']);
        // Set table:
        $this->table = $this->P['params']['table'];
        // Get TSconfig for it.
        $TSconfig = BackendUtility::getTCEFORM_TSconfig(
            $this->P['table'],
            is_array($record) ? $record : array('pid' => $this->P['pid'])
        );
        // Set [params][pid]
        if (substr($this->P['params']['pid'], 0, 3) === '###' && substr($this->P['params']['pid'], -3) === '###') {
            $keyword = substr($this->P['params']['pid'], 3, -3);
            if (strpos($keyword, 'PAGE_TSCONFIG_') === 0) {
                $this->pid = (int)$TSconfig[$this->P['field']][$keyword];
            } else {
                $this->pid = (int)$TSconfig['_' . $keyword];
            }
        } else {
            $this->pid = (int)$this->P['params']['pid'];
        }
        // Return if new record as parent (not possibly/allowed)
        if ($this->pid === '') {
            HttpUtility::redirect(GeneralUtility::sanitizeLocalUrl($this->P['returnUrl']));
        }
        // Else proceed:
        // If a new id has returned from a newly created record...
        if ($this->returnEditConf) {
            $editConfiguration = json_decode($this->returnEditConf, true);
            if (is_array($editConfiguration[$this->table]) && MathUtility::canBeInterpretedAsInteger($this->P['uid'])) {
                // Getting id and cmd from returning editConf array.
                reset($editConfiguration[$this->table]);
                $this->id = (int)key($editConfiguration[$this->table]);
                $cmd = current($editConfiguration[$this->table]);
                // ... and if everything seems OK we will register some classes for inclusion and instruct the object
                // to perform processing later.
                if ($this->P['params']['setValue']
                    && $cmd === 'edit'
                    && $this->id
                    && $this->P['table']
                    && $this->P['field'] && $this->P['uid']
                ) {
                    $liveRecord = BackendUtility::getLiveVersionOfRecord($this->table, $this->id, 'uid');
                    if ($liveRecord) {
                        $this->id = $liveRecord['uid'];
                    }
                    $this->processDataFlag = 1;
                }
            }
        }
    }

    public function mainAction(ServerRequestInterface $request, ResponseInterface $response)
    {
        $this->main();
        return $response;
    }

    public function main()
    {
        if ($this->returnEditConf) {
            if ($this->processDataFlag) {
                // This data processing is done here to basically just get the current record. It can be discussed
                // if this isn't overkill here. In case this construct does not work out well, it would be less
                // overhead to just BackendUtility::fetchRecord the current parent here.
                $formDataGroup = GeneralUtility::makeInstance(OnTheFly::class);
                $formDataGroup->setProviderList([ DatabaseEditRow::class ]);
                $formDataCompiler = GeneralUtility::makeInstance(FormDataCompiler::class, $formDataGroup);
                $input = [
                    'tableName' => $this->P['table'],
                    'vanillaUid' => (int)$this->P['uid'],
                    'command' => 'edit',
                ];
                $result = $formDataCompiler->compile($input);
                $currentParentRow = $result['databaseRow'];

                // If that record was found (should absolutely be...), then init DataHandler and set, prepend or append
                // the record
                if (is_array($currentParentRow)) {
                    $dataHandler = GeneralUtility::makeInstance(DataHandler::class);
                    $dataHandler->stripslashes_values = false;
                    $data = array();
                    $recordId = $this->table . '_' . $this->id;
                    // Setting the new field data:
                    // If the field is a flexForm field, work with the XML structure instead:
                    if ($this->P['flexFormPath']) {
                        // Current value of flexForm path:
                        $currentFlexFormData = GeneralUtility::xml2array($currentParentRow[$this->P['field']]);
                        $flexFormTools = GeneralUtility::makeInstance(FlexFormTools::class);
                        $currentFlexFormValue = $flexFormTools->getArrayValueByPath(
                            $this->P['flexFormPath'],
                            $currentFlexFormData
                        );
                        $insertValue = '';
                        switch ((string)$this->P['params']['setValue']) {
                            case 'set':
                                $insertValue = $recordId;
                                break;
                            case 'prepend':
                                $insertValue = $currentFlexFormValue . ',' . $recordId;
                                break;
                            case 'append':
                                $insertValue = $recordId . ',' . $currentFlexFormValue;
                                break;
                        }
                        $insertValue = implode(',', GeneralUtility::trimExplode(',', $insertValue, true));
                        $data[$this->P['table']][$this->P['uid']][$this->P['field']] = array();
                        $flexFormTools->setArrayValueByPath(
                            $this->P['flexFormPath'],
                            $data[$this->P['table']][$this->P['uid']][$this->P['field']],
                            $insertValue
                        );
                    } else {
                        switch ((string)$this->P['params']['setValue']) {
                            case 'set':
                                $data[$this->P['table']][$this->P['uid']][$this->P['field']] = $recordId;
                                break;
                            case 'prepend':
                                $data[$this->P['table']][$this->P['uid']][$this->P['field']] = $currentParentRow[$this->P['field']] . ',' . $recordId;
                                break;
                            case 'append':
                                $data[$this->P['table']][$this->P['uid']][$this->P['field']] = $recordId . ',' . $currentParentRow[$this->P['field']];
                                break;
                        }
                        $data[$this->P['table']][$this->P['uid']][$this->P['field']] = implode(
                            ',',
                            GeneralUtility::trimExplode(
                                ',',
                                $data[$this->P['table']][$this->P['uid']][$this->P['field']],
                                true
                            )
                        );
                    }
                    // Submit the data:
                    $dataHandler->start($data, array());
                    $dataHandler->process_datamap();
                }
            }
            // Return to the parent FormEngine record editing session:
            HttpUtility::redirect(GeneralUtility::sanitizeLocalUrl($this->P['returnUrl']));
        } else {
            // Redirecting to FormEngine with instructions to create a new record
            // AND when closing to return back with information about that records ID etc.
            $redirectUrl = BackendUtility::getModuleUrl('record_edit', array(
                'returnEditConf' => 1,
                'edit[' . $this->P['params']['table'] . '][' . $this->pid . ']' => 'new',
                'returnUrl' => GeneralUtility::removeXSS(GeneralUtility::getIndpEnv('REQUEST_URI'))
            ));
            HttpUtility::redirect($redirectUrl);
        }
    }
}