private function getCategoryIdentities()
    {
        $identities  = [];
        $categoryIds = [];
        $origData    = $this->optimizer->getOrigData();
        $data        = $this->optimizer->getData();

        // If optimizer was previously assigned to all categories, or is now set to all categories.
        $isAppliedToAllCategories = empty($data['catalog_view_container'])
            || (bool) $data['catalog_view_container']['apply_to'] === false;

        $wasAppliedToAllCategories = empty($origData['catalog_view_container']['category_ids']);

        if ($isAppliedToAllCategories || $wasAppliedToAllCategories) {
            $identities[] = \Magento\Catalog\Model\Category::CACHE_TAG;
        }

        if (!empty($data['catalog_view_container']['category_ids'])) {
            $categoryIds = array_merge($categoryIds, $data['catalog_view_container']['category_ids']);
        }

        if (!empty($origData['catalog_view_container']['category_ids'])) {
            $categoryIds = array_merge($categoryIds, $origData['catalog_view_container']['category_ids']);
        }

        $categoryIds = array_filter(array_unique($categoryIds));
        if (!empty($categoryIds)) {
            $categoryTags = array_map(function ($categoryId) {
                return \Magento\Catalog\Model\Category::CACHE_TAG . '_' . $categoryId;
            }, $categoryIds);

            $identities = array_merge($identities, $categoryTags);
        }

        return $identities;
    }
private function getCategoryIdentities()
    {
        $identities  = [];
        $categoryIds = [];
        $origData    = $this->optimizer->getOrigData();
        $data        = $this->optimizer->getData();

        // If optimizer was previously assigned to all categories, or is now set to all categories.
        $isAppliedToAllCategories = empty($data['catalog_view_container'])
            || (bool) $data['catalog_view_container']['apply_to'] === false;

        $wasAppliedToAllCategories = empty($origData['catalog_view_container']['category_ids']);

        if ($isAppliedToAllCategories || $wasAppliedToAllCategories) {
            $identities[] = \Magento\Catalog\Model\Category::CACHE_TAG;
        }

        if (!empty($data['catalog_view_container']['category_ids'])) {
            $categoryIds = array_merge($categoryIds, $data['catalog_view_container']['category_ids']);
        }

        if (!empty($origData['catalog_view_container']['category_ids'])) {
            $categoryIds = array_merge($categoryIds, $origData['catalog_view_container']['category_ids']);
        }

        $categoryIds = array_filter(array_unique($categoryIds));
        if (!empty($categoryIds)) {
            $categoryTags = array_map(function ($categoryId) {
                return \Magento\Catalog\Model\Category::CACHE_TAG . '_' . $categoryId;
            }, $categoryIds);

            $identities = array_merge($identities, $categoryTags);
        }

        return $identities;
    }
private function getCategoryIdentities ( ) { $ identities = [ ] ; $ categoryIds = [ ] ; $ origData = $ this -> optimizer -> getOrigData ( ) ; $ data = $ this -> optimizer -> getData ( ) ; // If optimizer was previously assigned to all categories, or is now set to all categories. $ isAppliedToAllCategories = empty ( $ data [ 'catalog_view_container' ] ) || ( bool ) $ data [ 'catalog_view_container' ] [ 'apply_to' ] === false ; $ wasAppliedToAllCategories = empty ( $ origData [ 'catalog_view_container' ] [ 'category_ids' ] ) ; if ( $ isAppliedToAllCategories || $ wasAppliedToAllCategories ) { $ identities [ ] = \ Magento \ Catalog \ Model \ Category :: CACHE_TAG ; } if ( ! empty ( $ data [ 'catalog_view_container' ] [ 'category_ids' ] ) ) { $ categoryIds = array_merge ( $ categoryIds , $ data [ 'catalog_view_container' ] [ 'category_ids' ] ) ; } if ( ! empty ( $ origData [ 'catalog_view_container' ] [ 'category_ids' ] ) ) { $ categoryIds = array_merge ( $ categoryIds , $ origData [ 'catalog_view_container' ] [ 'category_ids' ] ) ; } $ categoryIds = array_filter ( array_unique ( $ categoryIds ) ) ; if ( ! empty ( $ categoryIds ) ) { $ categoryTags = array_map ( function ( $ categoryId ) { return \ Magento \ Catalog \ Model \ Category :: CACHE_TAG . '_' . $ categoryId ; } , $ categoryIds ) ; $ identities = array_merge ( $ identities , $ categoryTags ) ; } return $ identities ; }
Get category identities related to current optimizer.

@return array
Get category identities related to current optimizer .