SemVer\SemVer\PreReleaseComparator

Complexity

Total Complexity

16

Size/Duplication

Total Lines	77
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	1

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	compare()	0	17	4
A	compareIdentifiers()	0	15	4
C	compareIdentifier()	0	22	8

<?php
declare(strict_types = 1);

namespace SemVer\SemVer;

final class PreReleaseComparator
{
    /**
     * @param Version $version1
     * @param Version $version2
     *
     * @return int
     */
    public static function compare(Version $version1, Version $version2) : int
    {
        $preRelease1 = $version1->getPreRelease();
        $preRelease2 = $version2->getPreRelease();

        $leftPreReleaseIsEmpty  = '' === $preRelease1;
        $rightPreReleaseIsEmpty = '' === $preRelease2;
        if ($rightPreReleaseIsEmpty !== $leftPreReleaseIsEmpty) {
            return $leftPreReleaseIsEmpty ? 1 : -1;
        }

        if ($leftPreReleaseIsEmpty) {
            return 0;
        }

        return self::compareIdentifiers(explode('.', $preRelease1), explode('.', $preRelease2));
    }

    /**
     * @param array $preReleaseIdentifiers1
     * @param array $preReleaseIdentifiers2
     *
     * @return int
     */
    private static function compareIdentifiers(array $preReleaseIdentifiers1, array $preReleaseIdentifiers2) : int
    {
        do {
            $preReleasePart1 = array_shift($preReleaseIdentifiers1);
            $preReleasePart2 = array_shift($preReleaseIdentifiers2);

            $compare = self::compareIdentifier($preReleasePart1, $preReleasePart2);

            if (0 !== $compare) {
                return $compare;
            }
        } while (count($preReleaseIdentifiers1) || count($preReleaseIdentifiers2));

        return 0;
    }

    /**
     * @param string $preReleasePart1
     * @param string $preReleasePart2
     *
     * @return int
     */
    private static function compareIdentifier(string $preReleasePart1, string $preReleasePart2) : int
    {
        if (null === $preReleasePart1) {
            return -1;
        }

        if (null === $preReleasePart2) {
            return 1;
        }

        $mineIsInt  = ctype_digit($preReleasePart1) && strpos($preReleasePart1, '00') !== 0;
        $theirIsInt = ctype_digit($preReleasePart2) && strpos($preReleasePart2, '00') !== 0;

        if ($mineIsInt !== $theirIsInt) {
            return $mineIsInt ? -1 : 1;
        }
        if ($mineIsInt) {
            return ((int) $preReleasePart1) <=> ((int) $preReleasePart2);
        }

        return $preReleasePart1 <=> $preReleasePart2;
    }
}