Indexing dce elements in solr, used in EXT:news ♥ Georg Ringer

In a recent project, the extensions solr, news & dce have been used. This blog post describes how relations to dce elements in a news record can be indexed.

As a first requirement, please add the following static TypoScript entries:

Search - Index queue configuration for news (solr)
Search - Index queue configuration for news with content elements (solr)

Add indexing userFunc

The extension dce saves its content in XML by using the core features of FlexForms. To be able to get the content into solr, a userFunc is reqired.

plugin.tx_solr.index.queue.news.fields.content.cObject {
  15 = USER
  15 {
    userFunc = GeorgRinger\NewsBlog\Hooks\Solr\DceIndexing->run
  }
}

Get dce’s content

By using the FlexFormService of the core, it is fairly simple to convert the xml structure to a useable and readable array.

Using a switch makes it easy to change the used fields per dce type.

<?php

namespace GeorgRinger\NewsBlog\Hooks\Solr;

use TYPO3\CMS\Core\Database\DatabaseConnection;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Service\FlexFormService;

class DceIndexing
{
    /**
     * @var \TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer
     */
    public $cObj;

    /** @var FlexFormService */
    protected $flexformService;

    public function __construct()
    {
        $this->flexformService = GeneralUtility::makeInstance(FlexFormService::class);
    }

    /**
     * @param mixed $content
     * @param array $conf
     * @return string
     */
    public function run($content, $conf)
    {
        $record = $this->cObj->data;

        $additionalContent = [];
        $contentElements = $this->getDatabaseConnection()->exec_SELECTgetRows(
            '*',
            'tt_content',
            'deleted=0 AND hidden = 0 AND CType LIKE "dce_%" AND tx_news_related_news=' . (int)$record['uid'],
            '',
            'sorting');

        foreach ($contentElements as $contentElement) {
            $dceContent = $this->getContentOfDce($contentElement);
            if (!empty($dceContent)) {
                $additionalContent[] = $dceContent;
            }
        }
        return implode(' ', $additionalContent);
    }


    protected function getContentOfDce(array $row)
    {
        $content = [];
        $xml = $row['pi_flexform'];
        if (empty($xml)) {
            return '';
        }

        $flexform = $this->flexformService->convertFlexFormContentToArray($xml);
        if (!empty($flexform['settings']['headline'])) {
            $content[] = $flexform['settings']['headline'];
        }

        $ctype = $this->getDceUid($row['CType']);
        switch ($ctype) {
            // Text
            case 1:
                if (!empty($flexform['settings']['txt'])) {
                    $content[] = $flexform['settings']['txt'];
                }
                break;
            default:
                // do nothing
        }

        return implode(' ', $content);
    }

    /**
     * @param string $ctype
     * @return int
     */
    protected function getDceUid($ctype)
    {
        $ctype = explode('dce_dceuid', $ctype);
        return (int)array_pop($ctype);
    }

    /**
     * @return DatabaseConnection
     */
    protected function getDatabaseConnection()
    {
        return $GLOBALS['TYPO3_DB'];
    }
}