meilisearch/Classes/Domain/Variants/IdBuilder.php

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<?php
namespace WapplerSystems\Meilisearch\Domain\Variants;
/***************************************************************
* Copyright notice
*
* (c) 2017- Timo Hund <timo.hund@dkd.de>
* All rights reserved
*
* This script is part of the TYPO3 project. The TYPO3 project is
* free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* The GNU General Public License can be found at
* http://www.gnu.org/copyleft/gpl.html.
*
* This script is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/
use TYPO3\CMS\Core\Utility\GeneralUtility;
/**
* The variantId can be used to group documents by a variantId. This variantId is by default unique per system,
* and has the following syntax:
*
* <SystemHash>/type/uid
*
* A file from one system will get the same variantId, which could be useful for de-duplication.
* @author Timo Hund <timo.hund@dkd.de>
*/
class IdBuilder
{
/**
* This method is used to build a variantId.
*
* By default the variantId is used
* @param string $type
* @param integer $uid
* @return string
*/
public function buildFromTypeAndUid($type, $uid)
{
$systemHash = $this->getSystemHash();
$variantId = $systemHash . '/' . $type . '/' . $uid;
$variantId = $this->applyHook($variantId, $systemHash, $type, $uid);
return $variantId;
}
/**
* Applies configured postProcessing hooks to build a custom variantId.
*
* @param string $variantId
* @param string $systemHash
* @param string $type
* @param integer $uid
* @return string
*/
protected function applyHook($variantId, $systemHash, $type, $uid)
{
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if (!is_array($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['meilisearch']['modifyVariantId'])) {
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return $variantId;
}
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foreach ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['meilisearch']['modifyVariantId'] as $classReference) {
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$variantIdModifier = GeneralUtility::makeInstance($classReference);
if ($variantIdModifier instanceof IdModifier) {
$variantId = $variantIdModifier->modifyVariantId($variantId, $systemHash, $type, $uid);
}
}
return $variantId;
}
/**
* Returns a system unique hash.
*
* @return string
*/
protected function getSystemHash()
{
if (!isset($GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'])) {
throw new \InvalidArgumentException("No sitename set in TYPO3_CONF_VARS|SYS|sitename");
}
$siteName = $GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'];
$systemKey = 'tx_meilisearch' . $siteName;
return GeneralUtility::hmac($systemKey);
}
}