WooCommerce - Add additional sorting by sales (ASC) - exclude out of stock

gistfile1.txt

// Add sorting option to sort products by sales (ASC) on the shop page
function add_custom_product_sorting_option( $options ) {
    $options['sales_asc'] = __( 'Sort by Sales (ASC)', 'text-domain' );
    return $options;
}
add_filter( 'woocommerce_get_catalog_ordering_args', 'add_custom_product_sorting_option' );

// Define sorting option arguments for sorting by sales (ASC) and excluding out-of-stock products
function set_custom_product_sorting_option( $sort_args ) {
    if ( isset( $_GET['orderby'] ) && 'sales_asc' === $_GET['orderby'] ) {
        $sort_args['orderby'] = 'meta_value_num';
        $sort_args['order']   = 'ASC';
        $sort_args['meta_key'] = 'total_sales'; // Change this if you have a different meta key for sales
        $sort_args['meta_query'] = array(
            array(
                'key'     => '_stock_status',
                'value'   => 'outofstock',
                'compare' => 'NOT EXISTS',
            ),
        );
    }
    return $sort_args;
}
add_filter( 'woocommerce_get_catalog_ordering_args', 'set_custom_product_sorting_option' );

// Modify the sorting options dropdown label
function modify_product_sorting_options( $sorting_options ) {
    $sorting_options['sales_asc'] = __( 'Sort by Sales (ASC)', 'text-domain' );
    return $sorting_options;
}
add_filter( 'woocommerce_catalog_orderby', 'modify_product_sorting_options' );