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<?php |
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/* |
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* This file is part of semver/semver. |
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* |
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* (c) SemVer <https://github.com/git-pull-request> |
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* |
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* For the full copyright and license information, please view |
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* the LICENSE file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace SemVer\SemVer; |
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/** |
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* Compare two Version objects. |
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*/ |
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final class VersionComparator |
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{ |
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/** @var Version */ |
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private $first; |
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/** @var Version */ |
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private $second; |
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/** |
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* @param Version $first |
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* @param Version $second |
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*/ |
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private function __construct(Version $first, Version $second) |
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{ |
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$this->first = $first; |
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$this->second = $second; |
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} |
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/** |
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* @param Version $first |
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* @param Version $second |
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* |
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* @return int |
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*/ |
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public static function compare(Version $first, Version $second) : int |
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{ |
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$obj = new self($first, $second); |
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return $obj->doCompare(); |
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} |
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/** |
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* @return int |
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*/ |
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private function doCompare() : int |
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{ |
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$compare = $this->compareNumericParts(); |
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if (0 !== $compare) { |
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return $compare; |
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} |
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return $this->comparePreRelease(); |
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} |
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/** |
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* @return int |
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*/ |
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private function compareNumericParts() : int |
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{ |
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$compare = $this->first->getMajor() <=> $this->second->getMajor(); |
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if (0 !== $compare) { |
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return $compare; |
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} |
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$compare = $this->first->getMinor() <=> $this->second->getMinor(); |
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if (0 !== $compare) { |
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return $compare; |
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} |
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$compare = $this->first->getPatch() <=> $this->second->getPatch(); |
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return $compare; |
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} |
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/** |
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* @return int |
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*/ |
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private function comparePreRelease() : int |
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{ |
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$preRelease1 = $this->first->getPreRelease(); |
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$preRelease2 = $this->second->getPreRelease(); |
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$leftPreReleaseIsEmpty = '' === $preRelease1; |
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$rightPreReleaseIsEmpty = '' === $preRelease2; |
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if ($rightPreReleaseIsEmpty !== $leftPreReleaseIsEmpty) { |
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return $leftPreReleaseIsEmpty ? 1 : -1; |
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} |
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if ($leftPreReleaseIsEmpty) { |
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return 0; |
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} |
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return $this->comparePreReleaseIdentifiers(explode('.', $preRelease1), explode('.', $preRelease2)); |
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} |
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/** |
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* @param array $identifiers1 |
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* @param array $identifiers2 |
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* |
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* @return int |
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*/ |
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private function comparePreReleaseIdentifiers(array $identifiers1, array $identifiers2) : int |
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{ |
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$preReleasePart1 = array_shift($identifiers1); |
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$preReleasePart2 = array_shift($identifiers2); |
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if (null === $preReleasePart2) { |
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return (int) (null !== $preReleasePart1); |
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} |
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if (null === $preReleasePart1) { |
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return -1; |
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} |
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$compare = $this->comparePreReleaseIdentifier($preReleasePart1, $preReleasePart2); |
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if (0 === $compare) { |
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return $this->comparePreReleaseIdentifiers($identifiers1, $identifiers2); |
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} |
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return $compare; |
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} |
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/** |
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* @param $identifier1 |
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* @param $identifier2 |
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* |
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* @return int |
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*/ |
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private function comparePreReleaseIdentifier($identifier1, $identifier2) : int |
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{ |
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$mineIsInt = $this->isIdentifierInt($identifier1); |
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$theirIsInt = $this->isIdentifierInt($identifier2); |
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if ($mineIsInt !== $theirIsInt) { |
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return $mineIsInt ? -1 : 1; |
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} |
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if ($mineIsInt) { |
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return ((int) $identifier1) <=> ((int) $identifier2); |
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} |
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return $identifier1 <=> $identifier2; |
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} |
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/** |
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* @param string $identifier |
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* |
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* @return bool |
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*/ |
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private function isIdentifierInt(string $identifier) : bool |
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{ |
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return ctype_digit($identifier) && strpos($identifier, '00') !== 0; |
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} |
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} |
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git-pull-request /
php-semver
