Backup #523

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<?php

namespace Domain\ValueObject;

enum TaskStatus: string
{
    case PENDING = 'pending';
    case IN_PROGRESS = 'in_progress';
    case COMPLETED = 'completed';
    case FAILED = 'failed';
    case CANCELLED = 'cancelled';

    /**
     * Check if transition to target status is allowed.
     */
    public function canTransitionTo(self $target): bool
    {
        return in_array($target, $this->getAllowedTransitions(), true);
    }

    /**
     * Get all allowed transitions from current status.
     *
     * @return array<self>
     */
    public function getAllowedTransitions(): array
    {
        return match ($this) {
            self::PENDING => [self::IN_PROGRESS, self::CANCELLED],
            self::IN_PROGRESS => [self::COMPLETED, self::FAILED, self::CANCELLED],
            self::COMPLETED => [],
            self::FAILED => [self::PENDING], // Allow retry
            self::CANCELLED => [],
        };
    }

    /**
     * Check if this is a terminal (final) status.
     */
    public function isTerminal(): bool
    {
        return in_array($this, [self::COMPLETED, self::FAILED, self::CANCELLED], true);
    }

    public function label(): string
    {
        return match ($this) {
            self::PENDING => 'Offen',
            self::IN_PROGRESS => 'In Arbeit',
            self::COMPLETED => 'Abgeschlossen',
            self::FAILED => 'Fehlgeschlagen',
            self::CANCELLED => 'Abgebrochen',
        };
    }
}

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