class Version

class Version {
    
    /**
     * @param bool $isFips Set by the method
     *
     * @param-out bool $isFips
     */
    public static function parseOpenssl(string $opensslVersion, ?bool &$isFips) : ?string {
        $isFips = false;
        if (!Preg::isMatchStrictGroups('/^(?<version>[0-9.]+)(?<patch>[a-z]{0,2})(?<suffix>(?:-?(?:dev|pre|alpha|beta|rc|fips)[\\d]*)*)(?:-\\w+)?(?: \\(.+?\\))?$/', $opensslVersion, $matches)) {
            return null;
        }
        // OpenSSL 1 used 1.2.3a style versioning, 3+ uses semver
        $patch = '';
        if (version_compare($matches['version'], '3.0.0', '<')) {
            $patch = '.' . self::convertAlphaVersionToIntVersion($matches['patch']);
        }
        $isFips = strpos($matches['suffix'], 'fips') !== false;
        $suffix = strtr('-' . ltrim($matches['suffix'], '-'), [
            '-fips' => '',
            '-pre' => '-alpha',
        ]);
        return rtrim($matches['version'] . $patch . $suffix, '-');
    }
    public static function parseLibjpeg(string $libjpegVersion) : ?string {
        if (!Preg::isMatchStrictGroups('/^(?<major>\\d+)(?<minor>[a-z]*)$/', $libjpegVersion, $matches)) {
            return null;
        }
        return $matches['major'] . '.' . self::convertAlphaVersionToIntVersion($matches['minor']);
    }
    public static function parseZoneinfoVersion(string $zoneinfoVersion) : ?string {
        if (!Preg::isMatchStrictGroups('/^(?<year>\\d{4})(?<revision>[a-z]*)$/', $zoneinfoVersion, $matches)) {
            return null;
        }
        return $matches['year'] . '.' . self::convertAlphaVersionToIntVersion($matches['revision']);
    }
    
    /**
     * "" => 0, "a" => 1, "zg" => 33
     */
    private static function convertAlphaVersionToIntVersion(string $alpha) : int {
        return strlen($alpha) * (-ord('a') + 1) + array_sum(array_map('ord', str_split($alpha)));
    }
    public static function convertLibxpmVersionId(int $versionId) : string {
        return self::convertVersionId($versionId, 100);
    }
    public static function convertOpenldapVersionId(int $versionId) : string {
        return self::convertVersionId($versionId, 100);
    }
    private static function convertVersionId(int $versionId, int $base) : string {
        return sprintf('%d.%d.%d', $versionId / ($base * $base), (int) ($versionId / $base) % $base, $versionId % $base);
    }

}