class PreReleaseSuffix

class PreReleaseSuffix {
    private const valueScoreMap = [
        'dev' => 0,
        'a' => 1,
        'alpha' => 1,
        'b' => 2,
        'beta' => 2,
        'rc' => 3,
        'p' => 4,
        'pl' => 4,
        'patch' => 4,
    ];
    
    /** @var string */
    private $value;
    
    /** @var int */
    private $valueScore;
    
    /** @var int */
    private $number = 0;
    
    /** @var string */
    private $full;
    
    /**
     * @throws InvalidPreReleaseSuffixException
     */
    public function __construct(string $value) {
        $this->parseValue($value);
    }
    public function asString() : string {
        return $this->full;
    }
    public function getValue() : string {
        return $this->value;
    }
    public function getNumber() : ?int {
        return $this->number;
    }
    public function isGreaterThan(PreReleaseSuffix $suffix) : bool {
        if ($this->valueScore > $suffix->valueScore) {
            return true;
        }
        if ($this->valueScore < $suffix->valueScore) {
            return false;
        }
        return $this->getNumber() > $suffix->getNumber();
    }
    private function mapValueToScore(string $value) : int {
        $value = \strtolower($value);
        return self::valueScoreMap[$value];
    }
    private function parseValue(string $value) : void {
        $regex = '/-?((dev|beta|b|rc|alpha|a|patch|p|pl)\\.?(\\d*)).*$/i';
        if (\preg_match($regex, $value, $matches) !== 1) {
            throw new InvalidPreReleaseSuffixException(\sprintf('Invalid label %s', $value));
        }
        $this->full = $matches[1];
        $this->value = $matches[2];
        if ($matches[3] !== '') {
            $this->number = (int) $matches[3];
        }
        $this->valueScore = $this->mapValueToScore($matches[2]);
    }

}