SoftReferenceHook.php

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<?php
namespace TYPO3\CMS\Rtehtmlarea\Hook;

/*
 * 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 SoftReferenceHook extends \TYPO3\CMS\Core\Database\SoftReferenceIndex
{
    // Token prefix
    public $tokenID_basePrefix = '';

    public function findRef($table, $field, $uid, $content, $spKey, $spParams, $structurePath = '')
    {
        $retVal = false;
        $this->tokenID_basePrefix = $table . ':' . $uid . ':' . $field . ':' . $structurePath . ':' . $spKey;
        switch ($spKey) {
            case 'rtehtmlarea_images':
                $retVal = $this->findRef_rtehtmlarea_images($content, $spParams);
                break;
            default:
                $retVal = false;
        }
        return $retVal;
    }

    public function findRef_rtehtmlarea_images($content, $spParams)
    {
        $retVal = false;
        // Start HTML parser and split content by image tag
        $htmlParser = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Html\HtmlParser::class);
        $imgTags = $htmlParser->splitTags('img', $content);
        $elements = [];
        // Traverse splitted parts
        foreach ($imgTags as $k => $v) {
            if ($k % 2) {
                // Get FAL uid reference
                $attribs = $htmlParser->get_tag_attributes($v);
                $fileUid = $attribs[0]['data-htmlarea-file-uid'];
                // If there is a file uid, continue. Otherwise ignore this img tag.
                if ($fileUid) {
                    // Initialize the element entry with info text here
                    $tokenID = $this->makeTokenID($k);
                    $elements[$k] = [];
                    $elements[$k]['matchString'] = $v;
                    // Token and substitute value
                    $imgTags[$k] = str_replace('data-htmlarea-file-uid="' . $fileUid . '"', 'data-htmlarea-file-uid="{softref:' . $tokenID . '}"', $imgTags[$k]);
                    $elements[$k]['subst'] = [
                        'type' => 'db',
                        'recordRef' => 'sys_file:' . $fileUid,
                        'tokenID' => $tokenID,
                        'tokenValue' => $fileUid
                    ];
                }
            }
        }
        // Assemble result array
        if (!empty($elements)) {
            $retVal = [
                'content' => implode('', $imgTags),
                'elements' => $elements
            ];
        }
        return $retVal;
    }
}