Fat Enums: State machine definition with transition attributes

OrderStatus.php

<?php

namespace App\Enums;

use ArtisanBuild\FatEnums\Attributes\CanTransitionTo;
use ArtisanBuild\FatEnums\Attributes\CanTransitionToSelf;
use ArtisanBuild\FatEnums\Attributes\FinalState;
use ArtisanBuild\FatEnums\Concerns\IsStateMachine;
use ArtisanBuild\FatEnums\Contracts\StateMachine;

enum OrderStatus: string implements StateMachine
{
    use IsStateMachine;

    public const DEFAULT = self::Pending;

    #[CanTransitionTo([self::Processing, self::Cancelled])]
    case Pending = 'pending';

    #[CanTransitionTo([self::Shipped, self::Cancelled])]
    #[CanTransitionToSelf] // Can re-process if needed
    case Processing = 'processing';

    #[CanTransitionTo([self::Delivered, self::Returned])]
    case Shipped = 'shipped';

    #[FinalState]
    case Delivered = 'delivered';

    #[FinalState]
    case Cancelled = 'cancelled';

    #[CanTransitionTo([self::Refunded])]
    case Returned = 'returned';

    #[FinalState]
    case Refunded = 'refunded';
}