All credits to Mr. Rakesh Jesadiya for this answer.
As per question asked, I think following my answer can help you.
-> There is a Build(...) in Magento\CatalogSearch\Model\Search\IndexBuilder.php . That is actually used to build all layered navigation filters.
What I did is, made plugin to override that Build(...) function and create around method to it.
Added custom collection query as required and returned product ids from the query.
Further added where query in main select query for returning filters.
Create di.xml in your custom module.
>Custom/Layernavigation/etc/di.xml
Add following code :
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<!-- Magento Catalog search Override IndexBuilder.php plugin file -->
<type name="Magento\CatalogSearch\Model\Search\IndexBuilder">
<plugin name="Custom_Layernavigation::CustomLayernavigation"
type="Custom\Layernavigation\Plugin\CatalogSearch\Model\Search\IndexBuilder" />
</type>
</config>
Now, create plugin file to override build function that builds all filters.
>Custom/Layernavigation/Plugin/CatalogSearch/Model/Search/IndexBuilder.php
<?php
namespace Custom\Layernavigation\Plugin\CatalogSearch\Model\Search;
use Magento\Framework\DB\Select;
use Magento\Framework\Search\Request\FilterInterface;
use Magento\Framework\Search\Request\Filter\BoolExpression;
use Magento\Framework\Search\Request\Query\Filter;
use Magento\Framework\Search\RequestInterface;
use Magento\Framework\Search\Request\QueryInterface as RequestQueryInterface;
use Magento\Framework\App\ResourceConnection;
class IndexBuilder
{
/**
* @var \Magento\Framework\App\Config\ScopeConfigInterface
*/
protected $scopeConfig;
/**
* @var \Magento\Store\Model\StoreManagerInterface
*/
protected $storeManager;
public function __construct(
\Magento\Store\Model\StoreManagerInterface $storeManager,
\Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
\Magento\Catalog\Model\Product\Visibility $productVisibility,
\Magento\Catalog\Helper\Category $categoryHelper,
\Magento\Framework\Registry $registry
) {
$this->storeManager = $storeManager;
$this->_productCollectionFactory = $productCollectionFactory;
$this->_productVisibility = $productVisibility;
$this->categoryHelper = $categoryHelper;
$this->registry = $registry;
}
/**
* Build index query
*
* @param $subject
* @param callable $proceed
* @param RequestInterface $request
* @return Select
* @SuppressWarnings(PHPMD.UnusedFormatParameter)
*/
public function aroundBuild($subject, callable $proceed, RequestInterface $request)
{
$select = $proceed($request);
$storeId = $this->storeManager->getStore()->getStoreId();
$rootCatId = $this->storeManager->getStore($storeId)->getRootCategoryId();
$productUniqueIds = $this->getCustomCollectionQuery();
$select->where('search_index.entity_id IN (' . join(',', $productUniqueIds) . ')');
return $select;
}
/**
*
* @return ProductIds[]
*/
public function getCustomCollectionQuery() {
/* get all category ids of current store */
$websiteId = $this->storeManager->getStore()->getWebsiteId();
$currentStoreAllCategories = $this->categoryHelper->getStoreCategories(false,true,true);
$collection = $this->_productCollectionFactory->create();
$collection->addAttributeToSelect(array('entity_id','sku'));
// filter current website products
$collection->addWebsiteFilter($websiteId);
// set visibility filter
$collection->setVisibility($this->_productVisibility->getVisibleInSiteIds());
/*SKU Filter Here*/
$sku = array('24-MB04', '24-MB03', '24-MB02');
$collection->addAttributeToFilter('sku', array('in' => $sku));
$getProductAllIds = $collection->getAllIds();
$getProductUniqueIds = array_unique($getProductAllIds);
return $getProductUniqueIds;
}
}
Please correct me If I'm wrong.
