Hook/CrawlerHook.php

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<?php
namespace TYPO3\CMS\IndexedSearch\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!
 */

use TYPO3\CMS\Backend\Form\FormEngine;
use TYPO3\CMS\Backend\Utility\BackendUtility;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class CrawlerHook
{
    public $secondsPerExternalUrl = 3;

    public $instanceCounter = 0;

    public $callBack = CrawlerHook::class;

    public function crawler_init(&$pObj)
    {
        // Select all indexing configuration which are waiting to be activated:
        $indexingConfigurations = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('*', 'index_config', 'hidden=0
                                AND (starttime=0 OR starttime<=' . $GLOBALS['EXEC_TIME'] . ')
                                AND timer_next_indexing<' . $GLOBALS['EXEC_TIME'] . '
                                AND set_id=0
                                ' . BackendUtility::deleteClause('index_config'));
        // For each configuration, check if it should be executed and if so, start:
        foreach ($indexingConfigurations as $cfgRec) {
            // Generate a unique set-ID:
            $setId = GeneralUtility::md5int(microtime());
            // Get next time:
            $nextTime = $this->generateNextIndexingTime($cfgRec);
            // Start process by updating index-config record:
            $field_array = array(
                'set_id' => $setId,
                'timer_next_indexing' => $nextTime,
                'session_data' => ''
            );
            $GLOBALS['TYPO3_DB']->exec_UPDATEquery('index_config', 'uid=' . (int)$cfgRec['uid'], $field_array);
            // Based on configuration type:
            switch ($cfgRec['type']) {
                case 1:
                    // RECORDS:
                    // Parameters:
                    $params = array(
                        'indexConfigUid' => $cfgRec['uid'],
                        'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                        'url' => 'Records (start)'
                    );
                    //
                    $pObj->addQueueEntry_callBack($setId, $params, $this->callBack, $cfgRec['pid']);
                    break;
                case 2:
                    // FILES:
                    // Parameters:
                    $params = array(
                        'indexConfigUid' => $cfgRec['uid'],
                        // General
                        'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                        // General
                        'url' => $cfgRec['filepath'],
                        // Partly general... (for URL and file types)
                        'depth' => 0
                    );
                    $pObj->addQueueEntry_callBack($setId, $params, $this->callBack, $cfgRec['pid']);
                    break;
                case 3:
                    // External URL:
                    // Parameters:
                    $params = array(
                        'indexConfigUid' => $cfgRec['uid'],
                        // General
                        'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                        // General
                        'url' => $cfgRec['externalUrl'],
                        // Partly general... (for URL and file types)
                        'depth' => 0
                    );
                    $pObj->addQueueEntry_callBack($setId, $params, $this->callBack, $cfgRec['pid']);
                    break;
                case 4:
                    // Page tree
                    // Parameters:
                    $params = array(
                        'indexConfigUid' => $cfgRec['uid'],
                        // General
                        'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                        // General
                        'url' => (int)$cfgRec['alternative_source_pid'],
                        // Partly general... (for URL and file types and page tree (root))
                        'depth' => 0
                    );
                    $pObj->addQueueEntry_callBack($setId, $params, $this->callBack, $cfgRec['pid']);
                    break;
                case 5:
                    // Meta configuration, nothing to do:
                    // NOOP
                    break;
                default:
                    if ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['indexed_search']['crawler'][$cfgRec['type']]) {
                        $hookObj = GeneralUtility::getUserObj($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['indexed_search']['crawler'][$cfgRec['type']]);
                        if (is_object($hookObj)) {
                            // Parameters:
                            $params = array(
                                'indexConfigUid' => $cfgRec['uid'],
                                // General
                                'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . '/CUSTOM]'),
                                // General
                                'url' => $hookObj->initMessage($message)
                            );
                            $pObj->addQueueEntry_callBack($setId, $params, $this->callBack, $cfgRec['pid']);
                        }
                    }
            }
        }
        // Finally, look up all old index configurations which are finished and needs to be reset and done.
        $this->cleanUpOldRunningConfigurations();
    }

    public function crawler_execute($params, &$pObj)
    {
        // Indexer configuration ID must exist:
        if ($params['indexConfigUid']) {
            // Load the indexing configuration record:
            $cfgRec = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('*', 'index_config', 'uid=' . (int)$params['indexConfigUid']);
            if (is_array($cfgRec)) {
                // Unpack session data:
                $session_data = unserialize($cfgRec['session_data']);
                // Select which type:
                switch ($cfgRec['type']) {
                    case 1:
                        // Records:
                        $this->crawler_execute_type1($cfgRec, $session_data, $params, $pObj);
                        break;
                    case 2:
                        // Files
                        $this->crawler_execute_type2($cfgRec, $session_data, $params, $pObj);
                        break;
                    case 3:
                        // External URL:
                        $this->crawler_execute_type3($cfgRec, $session_data, $params, $pObj);
                        break;
                    case 4:
                        // Page tree:
                        $this->crawler_execute_type4($cfgRec, $session_data, $params, $pObj);
                        break;
                    case 5:
                        // Meta
                        // NOOP (should never enter here!)
                        break;
                    default:
                        if ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['indexed_search']['crawler'][$cfgRec['type']]) {
                            $hookObj = GeneralUtility::getUserObj($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['indexed_search']['crawler'][$cfgRec['type']]);
                            if (is_object($hookObj)) {
                                $this->pObj = $pObj;
                                // For addQueueEntryForHook()
                                $hookObj->indexOperation($cfgRec, $session_data, $params, $this);
                            }
                        }
                }
                // Save process data which might be modified:
                $field_array = array(
                    'session_data' => serialize($session_data)
                );
                $GLOBALS['TYPO3_DB']->exec_UPDATEquery('index_config', 'uid=' . (int)$cfgRec['uid'], $field_array);
            }
        }
        return array('log' => $params);
    }

    public function crawler_execute_type1($cfgRec, &$session_data, $params, &$pObj)
    {
        if ($cfgRec['table2index'] && isset($GLOBALS['TCA'][$cfgRec['table2index']])) {
            // Init session data array if not already:
            if (!is_array($session_data)) {
                $session_data = array(
                    'uid' => 0
                );
            }
            // Init:
            $pid = (int)$cfgRec['alternative_source_pid'] ?: $cfgRec['pid'];
            $numberOfRecords = $cfgRec['recordsbatch'] ? \TYPO3\CMS\Core\Utility\MathUtility::forceIntegerInRange($cfgRec['recordsbatch'], 1) : 100;
            // Get root line:
            $rl = $this->getUidRootLineForClosestTemplate($cfgRec['pid']);
            // Select
            $recs = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('*', $cfgRec['table2index'], 'pid = ' . $pid . '
                                                        AND uid > ' . (int)$session_data['uid'] . BackendUtility::deleteClause($cfgRec['table2index']) . BackendUtility::BEenableFields($cfgRec['table2index']), '', 'uid', $numberOfRecords);
            // Traverse:
            if (!empty($recs)) {
                foreach ($recs as $r) {
                    // Index single record:
                    $this->indexSingleRecord($r, $cfgRec, $rl);
                    // Update the UID we last processed:
                    $session_data['uid'] = $r['uid'];
                }
                // Finally, set entry for next indexing of batch of records:
                $nparams = array(
                    'indexConfigUid' => $cfgRec['uid'],
                    'url' => 'Records from UID#' . ($r['uid'] + 1) . '-?',
                    'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']')
                );
                $pObj->addQueueEntry_callBack($cfgRec['set_id'], $nparams, $this->callBack, $cfgRec['pid']);
            }
        }
    }

    public function crawler_execute_type2($cfgRec, &$session_data, $params, &$pObj)
    {
        // Prepare path, making it absolute and checking:
        $readpath = $params['url'];
        if (!GeneralUtility::isAbsPath($readpath)) {
            $readpath = GeneralUtility::getFileAbsFileName($readpath);
        }
        if (GeneralUtility::isAllowedAbsPath($readpath)) {
            if (@is_file($readpath)) {
                // If file, index it!
                // Get root line (need to provide this when indexing external files)
                $rl = $this->getUidRootLineForClosestTemplate($cfgRec['pid']);
                // (Re)-Indexing file on page.
                $indexerObj = GeneralUtility::makeInstance(\TYPO3\CMS\IndexedSearch\Indexer::class);
                $indexerObj->backend_initIndexer($cfgRec['pid'], 0, 0, '', $rl);
                $indexerObj->backend_setFreeIndexUid($cfgRec['uid'], $cfgRec['set_id']);
                $indexerObj->hash['phash'] = -1;
                // EXPERIMENT - but to avoid phash_t3 being written to file sections (otherwise they are removed when page is reindexed!!!)
                // Index document:
                $indexerObj->indexRegularDocument(\TYPO3\CMS\Core\Utility\PathUtility::stripPathSitePrefix($readpath), true);
            } elseif (@is_dir($readpath)) {
                // If dir, read content and create new pending items for log:
                // Select files and directories in path:
                $extList = implode(',', GeneralUtility::trimExplode(',', $cfgRec['extensions'], true));
                $fileArr = array();
                $files = GeneralUtility::getAllFilesAndFoldersInPath($fileArr, $readpath, $extList, 0, 0);
                $directoryList = GeneralUtility::get_dirs($readpath);
                if (is_array($directoryList) && $params['depth'] < $cfgRec['depth']) {
                    foreach ($directoryList as $subdir) {
                        if ((string)$subdir != '') {
                            $files[] = $readpath . $subdir . '/';
                        }
                    }
                }
                $files = GeneralUtility::removePrefixPathFromList($files, PATH_site);
                // traverse the items and create log entries:
                foreach ($files as $path) {
                    $this->instanceCounter++;
                    if ($path !== $params['url']) {
                        // Parameters:
                        $nparams = array(
                            'indexConfigUid' => $cfgRec['uid'],
                            'url' => $path,
                            'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                            'depth' => $params['depth'] + 1
                        );
                        $pObj->addQueueEntry_callBack($cfgRec['set_id'], $nparams, $this->callBack, $cfgRec['pid'], $GLOBALS['EXEC_TIME'] + $this->instanceCounter * $this->secondsPerExternalUrl);
                    }
                }
            }
        }
    }

    public function crawler_execute_type3($cfgRec, &$session_data, $params, &$pObj)
    {
        // Init session data array if not already:
        if (!is_array($session_data)) {
            $session_data = array(
                'urlLog' => array($params['url'])
            );
        }
        // Index the URL:
        $rl = $this->getUidRootLineForClosestTemplate($cfgRec['pid']);
        $subUrls = $this->indexExtUrl($params['url'], $cfgRec['pid'], $rl, $cfgRec['uid'], $cfgRec['set_id']);
        // Add more elements to log now:
        if ($params['depth'] < $cfgRec['depth']) {
            foreach ($subUrls as $url) {
                if ($url = $this->checkUrl($url, $session_data['urlLog'], $cfgRec['externalUrl'])) {
                    if (!$this->checkDeniedSuburls($url, $cfgRec['url_deny'])) {
                        $this->instanceCounter++;
                        $session_data['urlLog'][] = $url;
                        // Parameters:
                        $nparams = array(
                            'indexConfigUid' => $cfgRec['uid'],
                            'url' => $url,
                            'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                            'depth' => $params['depth'] + 1
                        );
                        $pObj->addQueueEntry_callBack($cfgRec['set_id'], $nparams, $this->callBack, $cfgRec['pid'], $GLOBALS['EXEC_TIME'] + $this->instanceCounter * $this->secondsPerExternalUrl);
                    }
                }
            }
        }
    }

    public function crawler_execute_type4($cfgRec, &$session_data, $params, &$pObj)
    {
        // Base page uid:
        $pageUid = (int)$params['url'];
        // Get array of URLs from page:
        $pageRow = BackendUtility::getRecord('pages', $pageUid);
        $res = $pObj->getUrlsForPageRow($pageRow);
        $duplicateTrack = array();
        // Registry for duplicates
        $downloadUrls = array();
        // Dummy.
        // Submit URLs:
        if (!empty($res)) {
            foreach ($res as $paramSetKey => $vv) {
                $urlList = $pObj->urlListFromUrlArray($vv, $pageRow, $GLOBALS['EXEC_TIME'], 30, 1, 0, $duplicateTrack, $downloadUrls, array('tx_indexedsearch_reindex'));
            }
        }
        // Add subpages to log now:
        if ($params['depth'] < $cfgRec['depth']) {
            // Subpages selected
            $recs = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('uid,title', 'pages', 'pid = ' . $pageUid . BackendUtility::deleteClause('pages'));
            // Traverse subpages and add to queue:
            if (!empty($recs)) {
                foreach ($recs as $r) {
                    $this->instanceCounter++;
                    $url = 'pages:' . $r['uid'] . ': ' . $r['title'];
                    $session_data['urlLog'][] = $url;
                    // Parameters:
                    $nparams = array(
                        'indexConfigUid' => $cfgRec['uid'],
                        'url' => $r['uid'],
                        'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']'),
                        'depth' => $params['depth'] + 1
                    );
                    $pObj->addQueueEntry_callBack($cfgRec['set_id'], $nparams, $this->callBack, $cfgRec['pid'], $GLOBALS['EXEC_TIME'] + $this->instanceCounter * $this->secondsPerExternalUrl);
                }
            }
        }
    }

    public function cleanUpOldRunningConfigurations()
    {
        // Lookup running index configurations:
        $runningIndexingConfigurations = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('uid,set_id', 'index_config', 'set_id<>0' . BackendUtility::deleteClause('index_config'));
        // For each running configuration, look up how many log entries there are which are scheduled for execution and if none, clear the "set_id" (means; Processing was DONE)
        foreach ($runningIndexingConfigurations as $cfgRec) {
            // Look for ended processes:
            $queued_items = $GLOBALS['TYPO3_DB']->exec_SELECTcountRows('*', 'tx_crawler_queue', 'set_id=' . (int)$cfgRec['set_id'] . ' AND exec_time=0');
            if (!$queued_items) {
                // Lookup old phash rows:
                $oldPhashRows = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('phash', 'index_phash', 'freeIndexUid=' . (int)$cfgRec['uid'] . ' AND freeIndexSetId<>' . (int)$cfgRec['set_id']);
                foreach ($oldPhashRows as $pHashRow) {
                    // Removing old registrations for all tables (code copied from \TYPO3\CMS\IndexedSearch\Domain\Repository\IndexedPagesController\AdministrationRepository)
                    $tableArr = array('index_phash', 'index_rel', 'index_section', 'index_grlist', 'index_fulltext', 'index_debug');
                    foreach ($tableArr as $table) {
                        $GLOBALS['TYPO3_DB']->exec_DELETEquery($table, 'phash=' . (int)$pHashRow['phash']);
                    }
                }
                // End process by updating index-config record:
                $field_array = array(
                    'set_id' => 0,
                    'session_data' => ''
                );
                $GLOBALS['TYPO3_DB']->exec_UPDATEquery('index_config', 'uid=' . (int)$cfgRec['uid'], $field_array);
            }
        }
    }

    /*****************************************
     *
     * Helper functions
     *
     *****************************************/
    public function checkUrl($url, $urlLog, $baseUrl)
    {
        $url = preg_replace('/\\/\\/$/', '/', $url);
        list($url) = explode('#', $url);
        if (!strstr($url, '../')) {
            if (GeneralUtility::isFirstPartOfStr($url, $baseUrl)) {
                if (!in_array($url, $urlLog)) {
                    return $url;
                }
            }
        }
    }

    public function indexExtUrl($url, $pageId, $rl, $cfgUid, $setId)
    {
        // Index external URL:
        $indexerObj = GeneralUtility::makeInstance(\TYPO3\CMS\IndexedSearch\Indexer::class);
        $indexerObj->backend_initIndexer($pageId, 0, 0, '', $rl);
        $indexerObj->backend_setFreeIndexUid($cfgUid, $setId);
        $indexerObj->hash['phash'] = -1;
        // To avoid phash_t3 being written to file sections (otherwise they are removed when page is reindexed!!!)
        $indexerObj->indexExternalUrl($url);
        $url_qParts = parse_url($url);
        $baseAbsoluteHref = $url_qParts['scheme'] . '://' . $url_qParts['host'];
        $baseHref = $indexerObj->extractBaseHref($indexerObj->indexExternalUrl_content);
        if (!$baseHref) {
            // Extract base href from current URL
            $baseHref = $baseAbsoluteHref;
            $baseHref .= substr($url_qParts['path'], 0, strrpos($url_qParts['path'], '/'));
        }
        $baseHref = rtrim($baseHref, '/');
        // Get URLs on this page:
        $subUrls = array();
        $list = $indexerObj->extractHyperLinks($indexerObj->indexExternalUrl_content);
        // Traverse links:
        foreach ($list as $count => $linkInfo) {
            // Decode entities:
            $subUrl = htmlspecialchars_decode($linkInfo['href']);
            $qParts = parse_url($subUrl);
            if (!$qParts['scheme']) {
                $relativeUrl = GeneralUtility::resolveBackPath($subUrl);
                if ($relativeUrl[0] === '/') {
                    $subUrl = $baseAbsoluteHref . $relativeUrl;
                } else {
                    $subUrl = $baseHref . '/' . $relativeUrl;
                }
            }
            $subUrls[] = $subUrl;
        }
        return $subUrls;
    }

    public function indexSingleRecord($r, $cfgRec, $rl = null)
    {
        // Init:
        $rl = is_array($rl) ? $rl : $this->getUidRootLineForClosestTemplate($cfgRec['pid']);
        $fieldList = GeneralUtility::trimExplode(',', $cfgRec['fieldlist'], true);
        $languageField = $GLOBALS['TCA'][$cfgRec['table2index']]['ctrl']['languageField'];
        $sys_language_uid = $languageField ? $r[$languageField] : 0;
        // (Re)-Indexing a row from a table:
        $indexerObj = GeneralUtility::makeInstance(\TYPO3\CMS\IndexedSearch\Indexer::class);
        parse_str(str_replace('###UID###', $r['uid'], $cfgRec['get_params']), $GETparams);
        $indexerObj->backend_initIndexer($cfgRec['pid'], 0, $sys_language_uid, '', $rl, $GETparams, (bool)$cfgRec['chashcalc']);
        $indexerObj->backend_setFreeIndexUid($cfgRec['uid'], $cfgRec['set_id']);
        $indexerObj->forceIndexing = true;
        $theContent = '';
        foreach ($fieldList as $k => $v) {
            if (!$k) {
                $theTitle = $r[$v];
            } else {
                $theContent .= $r[$v] . ' ';
            }
        }
        // Indexing the record as a page (but with parameters set, see ->backend_setFreeIndexUid())
        $indexerObj->backend_indexAsTYPO3Page(strip_tags(str_replace('<', ' <', $theTitle)), '', '', strip_tags(str_replace('<', ' <', $theContent)), $GLOBALS['LANG']->charSet, $r[$GLOBALS['TCA'][$cfgRec['table2index']]['ctrl']['tstamp']], $r[$GLOBALS['TCA'][$cfgRec['table2index']]['ctrl']['crdate']], $r['uid']);
    }

    public function getUidRootLineForClosestTemplate($id)
    {
        $tmpl = GeneralUtility::makeInstance(\TYPO3\CMS\Core\TypoScript\ExtendedTemplateService::class);
        $tmpl->tt_track = 0;
        // Do not log time-performance information
        $tmpl->init();
        // Gets the rootLine
        $sys_page = GeneralUtility::makeInstance(\TYPO3\CMS\Frontend\Page\PageRepository::class);
        $rootLine = $sys_page->getRootLine($id);
        // This generates the constants/config + hierarchy info for the template.
        $tmpl->runThroughTemplates($rootLine, 0);
        // Root line uids
        $rootline_uids = array();
        foreach ($tmpl->rootLine as $rlkey => $rldat) {
            $rootline_uids[$rlkey] = $rldat['uid'];
        }
        return $rootline_uids;
    }

    public function generateNextIndexingTime($cfgRec)
    {
        $currentTime = $GLOBALS['EXEC_TIME'];
        // Now, find a midnight time to use for offset calculation. This has to differ depending on whether we have frequencies within a day or more than a day; Less than a day, we don't care which day to use for offset, more than a day we want to respect the currently entered day as offset regardless of when the script is run - thus the day-of-week used in case "Weekly" is selected will be respected
        if ($cfgRec['timer_frequency'] <= 24 * 3600) {
            $aMidNight = mktime(0, 0, 0) - 1 * 24 * 3600;
        } else {
            $lastTime = $cfgRec['timer_next_indexing'] ?: $GLOBALS['EXEC_TIME'];
            $aMidNight = mktime(0, 0, 0, date('m', $lastTime), date('d', $lastTime), date('y', $lastTime));
        }
        // Find last offset time plus frequency in seconds:
        $lastSureOffset = $aMidNight + \TYPO3\CMS\Core\Utility\MathUtility::forceIntegerInRange($cfgRec['timer_offset'], 0, 86400);
        $frequencySeconds = \TYPO3\CMS\Core\Utility\MathUtility::forceIntegerInRange($cfgRec['timer_frequency'], 1);
        // Now, find out how many blocks of the length of frequency there is until the next time:
        $frequencyBlocksUntilNextTime = ceil(($currentTime - $lastSureOffset) / $frequencySeconds);
        // Set next time to the offset + the frequencyblocks multiplied with the frequency length in seconds.
        return $lastSureOffset + $frequencyBlocksUntilNextTime * $frequencySeconds;
    }

    public function checkDeniedSuburls($url, $url_deny)
    {
        if (trim($url_deny)) {
            $url_denyArray = GeneralUtility::trimExplode(LF, $url_deny, true);
            foreach ($url_denyArray as $testurl) {
                if (GeneralUtility::isFirstPartOfStr($url, $testurl)) {
                    echo $url . ' /// ' . $url_deny . LF;
                    return true;
                }
            }
        }
        return false;
    }

    public function addQueueEntryForHook($cfgRec, $title)
    {
        $nparams = array(
            'indexConfigUid' => $cfgRec['uid'],
            // This must ALWAYS be the cfgRec uid!
            'url' => $title,
            'procInstructions' => array('[Index Cfg UID#' . $cfgRec['uid'] . ']')
        );
        $this->pObj->addQueueEntry_callBack($cfgRec['set_id'], $nparams, $this->callBack, $cfgRec['pid']);
    }

    public function deleteFromIndex($id)
    {
        // Lookup old phash rows:
        $oldPhashRows = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('phash', 'index_section', 'page_id=' . (int)$id);
        if (!empty($oldPhashRows)) {
            $pHashesToDelete = array();
            foreach ($oldPhashRows as $pHashRow) {
                $pHashesToDelete[] = $pHashRow['phash'];
            }
            $where_clause = 'phash IN (' . implode(',', $GLOBALS['TYPO3_DB']->cleanIntArray($pHashesToDelete)) . ')';
            $tables = array(
                'index_debug',
                'index_fulltext',
                'index_grlist',
                'index_phash',
                'index_rel',
                'index_section',
            );
            foreach ($tables as $table) {
                $GLOBALS['TYPO3_DB']->exec_DELETEquery($table, $where_clause);
            }
        }
    }

    /*************************
     *
     * Hook functions for TCEmain (indexing of records)
     *
     *************************/
    public function processCmdmap_preProcess($command, $table, $id, $value, $pObj)
    {
        // Clean up the index
        if ($command === 'delete' && $table === 'pages') {
            $this->deleteFromIndex($id);
        }
    }

    public function processDatamap_afterDatabaseOperations($status, $table, $id, $fieldArray, $pObj)
    {
        // Check if any fields are actually updated:
        if (!empty($fieldArray)) {
            // Translate new ids.
            if ($status === 'new') {
                $id = $pObj->substNEWwithIDs[$id];
            } elseif ($table === 'pages' && $status === 'update' && (array_key_exists('hidden', $fieldArray) && $fieldArray['hidden'] == 1 || array_key_exists('no_search', $fieldArray) && $fieldArray['no_search'] == 1)) {
                // If the page should be hidden or not indexed after update, delete index for this page
                $this->deleteFromIndex($id);
            }
            // Get full record and if exists, search for indexing configurations:
            $currentRecord = BackendUtility::getRecord($table, $id);
            if (is_array($currentRecord)) {
                // Select all (not running) indexing configurations of type "record" (1) and which points to this table and is located on the same page as the record or pointing to the right source PID
                $indexingConfigurations = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('*', 'index_config', 'hidden=0
                                                AND (starttime=0 OR starttime<=' . $GLOBALS['EXEC_TIME'] . ')
                                                AND set_id=0
                                                AND type=1
                                                AND table2index=' . $GLOBALS['TYPO3_DB']->fullQuoteStr($table, 'index_config') . '
                                                AND (
                                                                (alternative_source_pid=0 AND pid=' . (int)$currentRecord['pid'] . ')
                                                                OR (alternative_source_pid=' . (int)$currentRecord['pid'] . ')
                                                        )
                                                AND records_indexonchange=1
                                                ' . BackendUtility::deleteClause('index_config'));
                foreach ($indexingConfigurations as $cfgRec) {
                    $this->indexSingleRecord($currentRecord, $cfgRec);
                }
            }
        }
    }
}