LinkHandler.php

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<?php
namespace TYPO3\CMS\Linkvalidator\Linktype;

use TYPO3\CMS\Core\Utility\GeneralUtility;

class LinkHandler extends \TYPO3\CMS\Linkvalidator\Linktype\AbstractLinktype {

    const DELETED = 'deleted';

    public function checkLink($url, $softRefEntry, $reference) {
        $response = TRUE;
        $errorParams = array();
        $parts = explode(':', $url);
        if (count($parts) == 3) {
            $tableName = htmlspecialchars($parts[1]);
            $rowid = (int)$parts[2];
            $row = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('*', $tableName, 'uid = ' . (int)$rowid);
            if ($row) {
                if ($row['deleted'] == '1') {
                    $errorParams['errorType'] = self::DELETED;
                    $errorParams['tablename'] = $tableName;
                    $errorParams['uid'] = $rowid;
                    $response = FALSE;
                }
            } else {
                $errorParams['tablename'] = $tableName;
                $errorParams['uid'] = $rowid;
                $response = FALSE;
            }
        }

        if (!$response) {
            $this->setErrorParams($errorParams);
        }
        return $response;
    }

    public function fetchType($value, $type, $key) {
        if ($value['type'] === 'string' && GeneralUtility::isFirstPartOfStr(strtolower($value['tokenValue']), 'record:')) {
            $type = 'linkhandler';
        }
        return $type;
    }

    public function getErrorMessage($errorParams) {
        $errorType = $errorParams['errorType'];
        $tableName = $errorParams['tablename'];
        if (!empty($GLOBALS['TCA'][$tableName]['ctrl']['title'])) {
            $title = $GLOBALS['LANG']->sL($GLOBALS['TCA'][$tableName]['ctrl']['title'], TRUE);
        } else {
            $title = $tableName;
        }
        switch ($errorType) {
            case self::DELETED:
                $response = str_replace(
                    array(
                        '###title###',
                        '###uid###'
                    ),
                    array(
                        $title,
                        $errorParams['uid']
                    ),
                    $GLOBALS['LANG']->getLL('list.report.rowdeleted')
                );
                break;
            default:
                $response = str_replace('###uid###', $errorParams['uid'], $GLOBALS['LANG']->getLL('list.report.rownotexisting'));
        }
        return $response;
    }
}