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<?php |
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/** |
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* This file is part of the Version package. |
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* |
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* Copyright (c) Nikola Posa <[email protected]> |
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* |
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* For full copyright and license information, please refer to the LICENSE file, |
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* located at the package root folder. |
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*/ |
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namespace Version\Constraint; |
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use Version\Version; |
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use Version\Exception\InvalidConstraintException; |
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use Version\Constraint\Parser\ParserInterface; |
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use Version\Constraint\Parser\StandardParser; |
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/** |
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* @author Nikola Posa <[email protected]> |
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*/ |
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class Constraint implements ConstraintInterface |
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{ |
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const OPERATOR_EQ = '='; |
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const OPERATOR_NEQ = '!='; |
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const OPERATOR_GT = '>'; |
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const OPERATOR_GTE = '>='; |
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const OPERATOR_LT = '<'; |
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const OPERATOR_LTE = '<='; |
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/** |
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* @var string |
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*/ |
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protected $operator; |
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/** |
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* @var Version |
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*/ |
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protected $operand; |
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/** |
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* @var array |
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*/ |
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private static $validOperators = [ |
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self::OPERATOR_EQ, |
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self::OPERATOR_NEQ, |
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self::OPERATOR_GT, |
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self::OPERATOR_GTE, |
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self::OPERATOR_LT, |
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self::OPERATOR_LTE, |
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]; |
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/** |
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* @var ParserInterface |
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*/ |
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private static $parser; |
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private function __construct($operator, Version $operand) |
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{ |
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$this->operator = $operator; |
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$this->operand = $operand; |
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} |
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/** |
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* @param string $operator |
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* @param Version $operand |
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* @return self |
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*/ |
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public static function fromProperties($operator, Version $operand) |
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{ |
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if (!self::isOperatorValid($operator)) { |
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throw InvalidConstraintException::forOperator($operator); |
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} |
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return new self($operator, $operand); |
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} |
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protected static function isOperatorValid($operator) |
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{ |
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return in_array($operator, self::$validOperators); |
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} |
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/** |
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* @param string $constraintString |
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* @return self |
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*/ |
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public static function fromString($constraintString) |
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{ |
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return self::getParser()->parse($constraintString); |
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} |
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/** |
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* @return ParserInterface |
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*/ |
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public static function getParser() |
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{ |
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if (!isset(self::$parser)) { |
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self::setParser(new StandardParser()); |
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} |
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return self::$parser; |
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} |
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/** |
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* @param ParserInterface $parser |
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* @return void |
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*/ |
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public static function setParser(ParserInterface $parser) |
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{ |
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self::$parser = $parser; |
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} |
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/** |
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* @return string |
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*/ |
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public function getOperator() |
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{ |
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return $this->operator; |
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} |
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/** |
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* @return Version |
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*/ |
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public function getOperand() |
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{ |
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return $this->operand; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function assert(Version $version) |
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{ |
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switch ($this->operator) { |
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case self::OPERATOR_EQ: |
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return $version->isEqualTo($this->operand); |
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case self::OPERATOR_NEQ: |
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return !$version->isEqualTo($this->operand); |
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case self::OPERATOR_GT: |
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return $version->isGreaterThan($this->operand); |
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case self::OPERATOR_GTE: |
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return $version->isGreaterOrEqualTo($this->operand); |
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case self::OPERATOR_LT: |
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return $version->isLessThan($this->operand); |
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case self::OPERATOR_LTE: |
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return $version->isLessOrEqualTo($this->operand); |
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} |
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} |
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} |
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nikolaposa /
version
