<?php

namespace Chill\MainBundle\Doctrine\Migrations;

use Doctrine\Migrations\Version\Comparator;
use Doctrine\Migrations\Version\Version;

use function strcmp;
use function explode;

/**
 * Compare Version classes names from different namespaces and order them.
 *
 * Version are compared on the date's class.
 */
final class VersionComparator implements Comparator
{
    private function getNumber(Version $version): string
    {
        $names = explode("\\", (string) $version);

        return end($names);
    }

    public function compare(Version $a, Version $b): int
    {
        $q = strcmp($this->getNumber($a), $this->getNumber($b));

        return $q;
    }
}