<?php

declare(strict_types=1);

namespace Doctrine\Common\DataFixtures\Sorter;

use Doctrine\ORM\Mapping\ClassMetadata;

/**
 * @internal this class is to be used only by data-fixtures internals: do not
 *           rely on it in your own libraries/applications. This class is
 *           designed to work with {@see \Doctrine\Common\DataFixtures\Sorter\TopologicalSorter}
 *           only.
 */
class Vertex
{
    public const NOT_VISITED = 0;
    public const IN_PROGRESS = 1;
    public const VISITED     = 2;

    /** @var int one of either {@see self::NOT_VISITED}, {@see self::IN_PROGRESS} or {@see self::VISITED}. */
    public $state = self::NOT_VISITED;

    /** @var ClassMetadata Actual node value */
    public $value;

    /** @var string[] Map of node dependencies defined as hashes. */
    public $dependencyList = [];

    public function __construct(ClassMetadata $value)
    {
        $this->value = $value;
    }
}