/*

 * Register a custom order status

 *

 * @author Misha Rudrastyh

 * @url https://rudrastyh.com/woocommerce/order-statuses.html

 */

add_action( 'init', 'custom_order_status' );

function custom_order_status() {

	register_post_status(

		'wc-custom-packed',

		array(

			'label'		=> 'Packed',

			'public'	=> true,

			'show_in_admin_status_list' => true,

			'label_count'	=> _n_noop( 'Packed (%s)', 'Packed (%s)' )

		)

	);

	register_post_status(

		'wc-custom-shipping',

		array(

			'label'		=> 'Shipping',

			'public'	=> true,

			'show_in_admin_status_list' => true,

			'label_count'	=> _n_noop( 'Shipping (%s)', 'Shipping (%s)' )

		)

	);

}

// Add registered status to list of WC Order statuses

add_filter( 'wc_order_statuses', 'custom_add_status_to_list' );

function custom_add_status_to_list( $order_statuses ) {

	$new = array();

	foreach ( $order_statuses as $id => $label ) {

		if ( 'wc-completed' === $id ) { // before "Completed" status

			$new[ 'wc-custom-packed' ] = 'Packed';

			$new[ 'wc-custom-shipping' ] = 'Shipping';

		}

		$new[ $id ] = $label;

	}

	return $new;

}