protected function query_filters( $query_vars ) {
		$this->remove_ordering_args();
		// Custom order by arguments.
		if ( isset( $query_vars['orderby'] ) ) {
			$orderby = strtolower( $query_vars['orderby'] );
			$order   = isset( $query_vars['order'] ) ? strtoupper( $query_vars['order'] ) : 'DESC';

			if ( 'price' === $orderby ) {
				$callback = 'DESC' === $order ? 'order_by_price_desc_post_clauses' : 'order_by_price_asc_post_clauses';
				add_filter( 'posts_clauses', array( $this, $callback ) );
			}

			if ( 'sku' === $orderby ) {
				$callback = 'DESC' === $order ? 'order_by_sku_desc_post_clauses' : 'order_by_sku_asc_post_clauses';
				add_filter( 'posts_clauses', array( $this, $callback ) );
			}
		}

		// Type filtering.
		if ( isset( $query_vars['product_type'] ) ) {
			if ( 'downloadable' === $query_vars['product_type'] ) {
				$query_vars['product_type'] = '';
				add_filter( 'posts_clauses', array( $this, 'filter_downloadable_post_clauses' ) );
			} elseif ( 'virtual' === $query_vars['product_type'] ) {
				$query_vars['product_type'] = '';
				add_filter( 'posts_clauses', array( $this, 'filter_virtual_post_clauses' ) );
			}
		}

		// Stock status filter.
		if ( ! empty( $_GET['stock_status'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			add_filter( 'posts_clauses', array( $this, 'filter_stock_status_post_clauses' ) );
		}

		// Shipping class taxonomy.
		if ( ! empty( $_GET['product_shipping_class'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			$query_vars['tax_query'][] = array(
				'taxonomy' => 'product_shipping_class',
				'field'    => 'slug',
				'terms'    => sanitize_title( wp_unslash( $_GET['product_shipping_class'] ) ),
				'operator' => 'IN',
			);
		}

		// Search using CRUD.
		if ( ! empty( $query_vars['s'] ) ) {
			$data_store                   = WC_Data_Store::load( 'product' );
			$ids                          = $data_store->search_products( wc_clean( wp_unslash( $query_vars['s'] ) ), '', true, true );
			$query_vars['post__in']       = array_merge( $ids, array( 0 ) );
			$query_vars['product_search'] = true;
			unset( $query_vars['s'] );
		}

		return $query_vars;
	}