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<?php |
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/** |
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* @copyright (c) 2014-2017 brian ridley |
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* @author brian ridley <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace ptlis\SemanticVersion\Parse; |
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use ptlis\SemanticVersion\Version\Label\LabelBuilder; |
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use ptlis\SemanticVersion\Version\Version; |
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use ptlis\SemanticVersion\Version\VersionInterface; |
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/** |
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* Matcher that can be used to parse version numbers. |
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*/ |
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final class VersionParser |
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{ |
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/** @var LabelBuilder */ |
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private $labelBuilder; |
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/** Array of token patterns that can be used to construct a valid semantic version number */ |
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private $validPatterns = [ |
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[Token::DIGITS], |
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[Token::DIGITS, Token::DOT_SEPARATOR], // Allow trailing dot |
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[Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS], |
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[Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS, Token::DOT_SEPARATOR], // Allow trailing dot |
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[Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS], |
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[Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS, |
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Token::DASH_SEPARATOR, Token::LABEL_STRING], |
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[Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS, Token::DOT_SEPARATOR, Token::DIGITS, |
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Token::DASH_SEPARATOR, Token::LABEL_STRING, Token::DOT_SEPARATOR, Token::DIGITS] |
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]; |
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/** |
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* @param LabelBuilder $labelBuilder |
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*/ |
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public function __construct( |
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LabelBuilder $labelBuilder |
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) { |
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$this->labelBuilder = $labelBuilder; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function canParse(array $tokenList) |
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{ |
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$isVersion = false; |
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foreach ($this->validPatterns as $pattern) { |
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$isVersion = $isVersion || $this->tokensMatchPattern($tokenList, $pattern); |
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} |
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return $isVersion; |
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} |
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/** |
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* Parses the token list into an appropriate value type. |
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* |
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* @throws \RuntimeException If the version cannot be parsed. |
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* |
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* @param Token[] $tokenList |
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* |
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* @return VersionInterface |
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*/ |
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public function parse(array $tokenList) |
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{ |
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if (!$this->canParse($tokenList)) { |
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throw new \RuntimeException('Invalid version'); |
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} |
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$major = $tokenList[0]->getValue(); |
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$minor = 0; |
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$patch = 0; |
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$label = null; |
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if (count($tokenList) >= 3) { |
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$minor = $tokenList[2]->getValue(); |
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} |
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if (count($tokenList) >= 5) { |
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$patch = $tokenList[4]->getValue(); |
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} |
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// Build label from tokens following hyphen seperator |
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if (count($tokenList) >= 7) { |
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$label = $this->labelBuilder->buildFromTokens(array_slice($tokenList, 6)); |
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} |
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return new Version($major, $minor, $patch, $label); |
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} |
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/** |
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* Returns true if the tokens match the specified pattern. |
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* |
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* @param Token[] $tokenList |
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* @param string[] $pattern |
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* |
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* @return bool |
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*/ |
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private function tokensMatchPattern( |
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array $tokenList, |
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array $pattern |
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) { |
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$matches = count($tokenList) === count($pattern); |
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foreach ($tokenList as $index => $token) { |
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if ($matches) { |
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$matches = $pattern[$index] === $token->getType(); |
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} |
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} |
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return $matches; |
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} |
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} |
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ptlis /
semantic-version
