TableMapper.php

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<?php
namespace Magento\CatalogSearch\Model\Search;

use Magento\Catalog\Model\ResourceModel\Product\Attribute\CollectionFactory;
use Magento\CatalogSearch\Model\Adapter\Mysql\Filter\AliasResolver;
use Magento\CatalogSearch\Model\Search\FilterMapper\FilterStrategyInterface;
use Magento\Eav\Model\Config as EavConfig;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\ObjectManager;
use Magento\Framework\App\ResourceConnection as AppResource;
use Magento\Framework\DB\Select;
use Magento\Framework\Search\Request\FilterInterface;
use Magento\Framework\Search\RequestInterface;
use Magento\Store\Model\StoreManagerInterface;

class TableMapper
{
    private $filterStrategy;

    private $aliasResolver;

    private $filtersExtractor;

    public function __construct(
        AppResource $resource,
        StoreManagerInterface $storeManager,
        CollectionFactory $attributeCollectionFactory,
        EavConfig $eavConfig = null,
        ScopeConfigInterface $scopeConfig = null,
        FilterStrategyInterface $filterStrategy = null,
        AliasResolver $aliasResolver = null,
        FiltersExtractor $filtersExtractor = null
    ) {
        if (null === $filterStrategy) {
            $filterStrategy = ObjectManager::getInstance()->get(FilterStrategyInterface::class);
        }
        if (null === $aliasResolver) {
            $aliasResolver = ObjectManager::getInstance()->get(AliasResolver::class);
        }
        if (null === $filtersExtractor) {
            $filtersExtractor = ObjectManager::getInstance()->get(FiltersExtractor::class);
        }

        $this->filterStrategy = $filterStrategy;
        $this->aliasResolver = $aliasResolver;
        $this->filtersExtractor = $filtersExtractor;
    }

    public function addTables(Select $select, RequestInterface $request)
    {
        $appliedFilters = [];
        $filters = $this->filtersExtractor->extractFiltersFromQuery($request->getQuery());
        foreach ($filters as $filter) {
            $alias = $this->aliasResolver->getAlias($filter);
            if (!array_key_exists($alias, $appliedFilters)) {
                $isApplied = $this->filterStrategy->apply($filter, $select);
                if ($isApplied) {
                    $appliedFilters[$alias] = true;
                }
            }
        }
        return $select;
    }

    public function getMappingAlias(FilterInterface $filter)
    {
        return $this->aliasResolver->getAlias($filter);
    }
}