Mfrhtyj

I am using WeltPixel layered navigation Free extension. In category filter, third level categories was not showing in filter navigation by default. I added some code to get third level categories.

protected function _getItemsData()

    {

        if (!$this->_moduleHelper->isEnabled()) {

            return parent::_getItemsData();

        }



        /** @var MagentoCatalogSearchModelResourceModelFulltextCollection $productCollection */

        $_objectManager = MagentoFrameworkAppObjectManager::getInstance();



        $productCollection = $this->getLayer()->getProductCollection();



        if ($this->_isFilter) {

            $productCollection = $productCollection->getCollectionClone()

                ->removeAttributeSearch('category_ids');

        }



        $optionsFacetedData = $productCollection->getFacetedData('category');

        $category           = $this->dataProvider->getCategory();

        $categories         = $category->getChildrenCategories();



        $collectionSize = $productCollection->getSize();



        if ($category->getIsActive()) {

            foreach ($categories as $category) {

                $count = isset($optionsFacetedData[$category->getId()]) ? $optionsFacetedData[$category->getId()]['count'] : 0;

                if ($category->getIsActive()

                    && $this->_layerFilter->isOptionReducesResults($this, $count, $collectionSize)

                ) {

                 $this->itemDataBuilder->addItemData(

                        $this->escaper->escapeHtml($category->getName()),

                        $category->getId(),

                        $count

                    );

                }

                // added for child categories

             $cat = $_objectManager->create('MagentoCatalogModelCategory')->load($category->getId());

                $sub_category = $cat->getChildrenCategories();



                foreach ($sub_category as $category) {

                    if ($category->getIsActive()

                            && isset($optionsFacetedData[$category->getId()])

                            && $this->isOptionReducesResults($optionsFacetedData[$category->getId()]['count'], $collectionSize)

                        ) 

                    {

                      $this->itemDataBuilder->addItemData(

                            $this->escaper->escapeHtml($category->getName()),

                            $category->getId(),

                            $optionsFacetedData[$category->getId()]['count']

                        );

                    }

                } //

               // end child categories code

        }

    }

return $this->itemDataBuilder->build();

    }

}

Child categories are now showing, but the issue is all parent & child categories are showing in single ol li list. Screenshots

Category List HTML

How to identify Parent and child categories using above code?