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Mini Shell
<?php
/*
* This file is part of composer/semver.
*
* (c) Composer <https://github.com/composer>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace Composer\Semver\Constraint;
/**
* Defines a constraint.
*/
class Constraint implements ConstraintInterface
{
/* operator integer values */
const OP_EQ = 0;
const OP_LT = 1;
const OP_LE = 2;
const OP_GT = 3;
const OP_GE = 4;
const OP_NE = 5;
/* operator string values */
const STR_OP_EQ = '==';
const STR_OP_EQ_ALT = '=';
const STR_OP_LT = '<';
const STR_OP_LE = '<=';
const STR_OP_GT = '>';
const STR_OP_GE = '>=';
const STR_OP_NE = '!=';
const STR_OP_NE_ALT = '<>';
/**
* Operator to integer translation table.
*
* @var array
* @phpstan-var array<self::STR_OP_*, self::OP_*>
*/
private static $transOpStr = array(
'=' => self::OP_EQ,
'==' => self::OP_EQ,
'<' => self::OP_LT,
'<=' => self::OP_LE,
'>' => self::OP_GT,
'>=' => self::OP_GE,
'<>' => self::OP_NE,
'!=' => self::OP_NE,
);
/**
* Integer to operator translation table.
*
* @var array
* @phpstan-var array<self::OP_*, self::STR_OP_*>
*/
private static $transOpInt = array(
self::OP_EQ => '==',
self::OP_LT => '<',
self::OP_LE => '<=',
self::OP_GT => '>',
self::OP_GE => '>=',
self::OP_NE => '!=',
);
/**
* @var int
* @phpstan-var self::OP_*
*/
protected $operator;
/** @var string */
protected $version;
/** @var string|null */
protected $prettyString;
/** @var Bound */
protected $lowerBound;
/** @var Bound */
protected $upperBound;
/**
* Sets operator and version to compare with.
*
* @param string $operator
* @param string $version
*
* @throws \InvalidArgumentException if invalid operator is given.
*
* @phpstan-param self::STR_OP_* $operator
*/
public function __construct($operator, $version)
{
if (!isset(self::$transOpStr[$operator])) {
throw new \InvalidArgumentException(sprintf(
'Invalid operator "%s" given, expected one of: %s',
$operator,
implode(', ', self::getSupportedOperators())
));
}
$this->operator = self::$transOpStr[$operator];
$this->version = $version;
}
/**
* @return string
*/
public function getVersion()
{
return $this->version;
}
/**
* @return string
*
* @phpstan-return self::STR_OP_*
*/
public function getOperator()
{
return self::$transOpInt[$this->operator];
}
/**
* @param ConstraintInterface $provider
*
* @return bool
*/
public function matches(ConstraintInterface $provider)
{
if ($provider instanceof self) {
return $this->matchSpecific($provider);
}
// turn matching around to find a match
return $provider->matches($this);
}
/**
* {@inheritDoc}
*/
public function setPrettyString($prettyString)
{
$this->prettyString = $prettyString;
}
/**
* {@inheritDoc}
*/
public function getPrettyString()
{
if ($this->prettyString) {
return $this->prettyString;
}
return $this->__toString();
}
/**
* Get all supported comparison operators.
*
* @return array
*
* @phpstan-return list<self::STR_OP_*>
*/
public static function getSupportedOperators()
{
return array_keys(self::$transOpStr);
}
/**
* @param string $operator
* @return int
*
* @phpstan-param self::STR_OP_* $operator
* @phpstan-return self::OP_*
*/
public static function getOperatorConstant($operator)
{
return self::$transOpStr[$operator];
}
/**
* @param string $a
* @param string $b
* @param string $operator
* @param bool $compareBranches
*
* @throws \InvalidArgumentException if invalid operator is given.
*
* @return bool
*
* @phpstan-param self::STR_OP_* $operator
*/
public function versionCompare($a, $b, $operator, $compareBranches = false)
{
if (!isset(self::$transOpStr[$operator])) {
throw new \InvalidArgumentException(sprintf(
'Invalid operator "%s" given, expected one of: %s',
$operator,
implode(', ', self::getSupportedOperators())
));
}
$aIsBranch = strpos($a, 'dev-') === 0;
$bIsBranch = strpos($b, 'dev-') === 0;
if ($operator === '!=' && ($aIsBranch || $bIsBranch)) {
return $a !== $b;
}
if ($aIsBranch && $bIsBranch) {
return $operator === '==' && $a === $b;
}
// when branches are not comparable, we make sure dev branches never match anything
if (!$compareBranches && ($aIsBranch || $bIsBranch)) {
return false;
}
return \version_compare($a, $b, $operator);
}
/**
* {@inheritDoc}
*/
public function compile($otherOperator)
{
if (strpos($this->version, 'dev-') === 0) {
if (self::OP_EQ === $this->operator) {
if (self::OP_EQ === $otherOperator) {
return sprintf('$b && $v === %s', \var_export($this->version, true));
}
if (self::OP_NE === $otherOperator) {
return sprintf('!$b || $v !== %s', \var_export($this->version, true));
}
return 'false';
}
if (self::OP_NE === $this->operator) {
if (self::OP_EQ === $otherOperator) {
return sprintf('!$b || $v !== %s', \var_export($this->version, true));
}
if (self::OP_NE === $otherOperator) {
return 'true';
}
return '!$b';
}
return 'false';
}
if (self::OP_EQ === $this->operator) {
if (self::OP_EQ === $otherOperator) {
return sprintf('\version_compare($v, %s, \'==\')', \var_export($this->version, true));
}
if (self::OP_NE === $otherOperator) {
return sprintf('$b || \version_compare($v, %s, \'!=\')', \var_export($this->version, true));
}
return sprintf('!$b && \version_compare(%s, $v, \'%s\')', \var_export($this->version, true), self::$transOpInt[$otherOperator]);
}
if (self::OP_NE === $this->operator) {
if (self::OP_EQ === $otherOperator) {
return sprintf('$b || (!$b && \version_compare($v, %s, \'!=\'))', \var_export($this->version, true));
}
if (self::OP_NE === $otherOperator) {
return 'true';
}
return '!$b';
}
if (self::OP_LT === $this->operator || self::OP_LE === $this->operator) {
if (self::OP_LT === $otherOperator || self::OP_LE === $otherOperator) {
return '!$b';
}
} else { // $this->operator must be self::OP_GT || self::OP_GE here
if (self::OP_GT === $otherOperator || self::OP_GE === $otherOperator) {
return '!$b';
}
}
if (self::OP_NE === $otherOperator) {
return 'true';
}
$codeComparison = sprintf('\version_compare($v, %s, \'%s\')', \var_export($this->version, true), self::$transOpInt[$this->operator]);
if ($this->operator === self::OP_LE) {
if ($otherOperator === self::OP_GT) {
return sprintf('!$b && \version_compare($v, %s, \'!=\') && ', \var_export($this->version, true)) . $codeComparison;
}
} elseif ($this->operator === self::OP_GE) {
if ($otherOperator === self::OP_LT) {
return sprintf('!$b && \version_compare($v, %s, \'!=\') && ', \var_export($this->version, true)) . $codeComparison;
}
}
return sprintf('!$b && %s', $codeComparison);
}
/**
* @param Constraint $provider
* @param bool $compareBranches
*
* @return bool
*/
public function matchSpecific(Constraint $provider, $compareBranches = false)
{
$noEqualOp = str_replace('=', '', self::$transOpInt[$this->operator]);
$providerNoEqualOp = str_replace('=', '', self::$transOpInt[$provider->operator]);
$isEqualOp = self::OP_EQ === $this->operator;
$isNonEqualOp = self::OP_NE === $this->operator;
$isProviderEqualOp = self::OP_EQ === $provider->operator;
$isProviderNonEqualOp = self::OP_NE === $provider->operator;
// '!=' operator is match when other operator is not '==' operator or version is not match
// these kinds of comparisons always have a solution
if ($isNonEqualOp || $isProviderNonEqualOp) {
if ($isNonEqualOp && !$isProviderNonEqualOp && !$isProviderEqualOp && strpos($provider->version, 'dev-') === 0) {
return false;
}
if ($isProviderNonEqualOp && !$isNonEqualOp && !$isEqualOp && strpos($this->version, 'dev-') === 0) {
return false;
}
if (!$isEqualOp && !$isProviderEqualOp) {
return true;
}
return $this->versionCompare($provider->version, $this->version, '!=', $compareBranches);
}
// an example for the condition is <= 2.0 & < 1.0
// these kinds of comparisons always have a solution
if ($this->operator !== self::OP_EQ && $noEqualOp === $providerNoEqualOp) {
return !(strpos($this->version, 'dev-') === 0 || strpos($provider->version, 'dev-') === 0);
}
$version1 = $isEqualOp ? $this->version : $provider->version;
$version2 = $isEqualOp ? $provider->version : $this->version;
$operator = $isEqualOp ? $provider->operator : $this->operator;
if ($this->versionCompare($version1, $version2, self::$transOpInt[$operator], $compareBranches)) {
// special case, e.g. require >= 1.0 and provide < 1.0
// 1.0 >= 1.0 but 1.0 is outside of the provided interval
return !(self::$transOpInt[$provider->operator] === $providerNoEqualOp
&& self::$transOpInt[$this->operator] !== $noEqualOp
&& \version_compare($provider->version, $this->version, '=='));
}
return false;
}
/**
* @return string
*/
public function __toString()
{
return self::$transOpInt[$this->operator] . ' ' . $this->version;
}
/**
* {@inheritDoc}
*/
public function getLowerBound()
{
$this->extractBounds();
return $this->lowerBound;
}
/**
* {@inheritDoc}
*/
public function getUpperBound()
{
$this->extractBounds();
return $this->upperBound;
}
/**
* @return void
*/
private function extractBounds()
{
if (null !== $this->lowerBound) {
return;
}
// Branches
if (strpos($this->version, 'dev-') === 0) {
$this->lowerBound = Bound::zero();
$this->upperBound = Bound::positiveInfinity();
return;
}
switch ($this->operator) {
case self::OP_EQ:
$this->lowerBound = new Bound($this->version, true);
$this->upperBound = new Bound($this->version, true);
break;
case self::OP_LT:
$this->lowerBound = Bound::zero();
$this->upperBound = new Bound($this->version, false);
break;
case self::OP_LE:
$this->lowerBound = Bound::zero();
$this->upperBound = new Bound($this->version, true);
break;
case self::OP_GT:
$this->lowerBound = new Bound($this->version, false);
$this->upperBound = Bound::positiveInfinity();
break;
case self::OP_GE:
$this->lowerBound = new Bound($this->version, true);
$this->upperBound = Bound::positiveInfinity();
break;
case self::OP_NE:
$this->lowerBound = Bound::zero();
$this->upperBound = Bound::positiveInfinity();
break;
}
}
}
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