Backup #806

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<?php

namespace Domain\Exception;

use BackedEnum;
use DomainException;

/**
 * Exception thrown when an invalid state transition is attempted.
 */
final class InvalidStateTransitionException extends DomainException
{
    /**
     * @param BackedEnum $from Current status
     * @param BackedEnum $to Target status
     * @param array<BackedEnum> $allowed Allowed transitions from current status
     */
    public function __construct(
        public readonly BackedEnum $from,
        public readonly BackedEnum $to,
        public readonly array $allowed
    ) {
        $allowedValues = array_map(
            static fn (BackedEnum $s): string => (string) $s->value,
            $allowed
        );

        $message = sprintf(
            'Ungültiger Statusübergang von "%s" nach "%s". Erlaubt: %s',
            $from->value,
            $to->value,
            $allowedValues !== [] ? implode(', ', $allowedValues) : 'keine'
        );

        parent::__construct($message);
    }

    /**
     * Get allowed transition values as strings.
     *
     * @return array<string>
     */
    public function getAllowedValues(): array
    {
        return array_map(
            static fn (BackedEnum $s): string => (string) $s->value,
            $this->allowed
        );
    }
}

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