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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\DependencyResolver;
use Composer\Package\Version\VersionParser;
use Composer\Semver\CompilingMatcher;
use Composer\Semver\Constraint\ConstraintInterface;
use Composer\Semver\Constraint\Constraint;
use Composer\Package\PackageInterface;
/**
* A package pool contains all packages for dependency resolution
*
* @author Nils Adermann <naderman@naderman.de>
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class Pool implements \Countable
{
protected $packages = array();
protected $packageByName = array();
protected $versionParser;
protected $providerCache = array();
protected $unacceptableFixedOrLockedPackages;
public function __construct(array $packages = array(), array $unacceptableFixedOrLockedPackages = array())
{
$this->versionParser = new VersionParser;
$this->setPackages($packages);
$this->unacceptableFixedOrLockedPackages = $unacceptableFixedOrLockedPackages;
}
private function setPackages(array $packages)
{
$id = 1;
foreach ($packages as $package) {
$this->packages[] = $package;
$package->id = $id++;
foreach ($package->getNames() as $provided) {
$this->packageByName[$provided][] = $package;
}
}
}
public function getPackages()
{
return $this->packages;
}
/**
* Retrieves the package object for a given package id.
*
* @param int $id
* @return PackageInterface
*/
public function packageById($id)
{
return $this->packages[$id - 1];
}
/**
* Returns how many packages have been loaded into the pool
*/
public function count()
{
return \count($this->packages);
}
/**
* Searches all packages providing the given package name and match the constraint
*
* @param string $name The package name to be searched for
* @param ConstraintInterface $constraint A constraint that all returned
* packages must match or null to return all
* @return PackageInterface[] A set of packages
*/
public function whatProvides($name, ConstraintInterface $constraint = null)
{
$key = (string) $constraint;
if (isset($this->providerCache[$name][$key])) {
return $this->providerCache[$name][$key];
}
return $this->providerCache[$name][$key] = $this->computeWhatProvides($name, $constraint);
}
/**
* @see whatProvides
*/
private function computeWhatProvides($name, $constraint)
{
if (!isset($this->packageByName[$name])) {
return array();
}
$matches = array();
foreach ($this->packageByName[$name] as $candidate) {
if ($this->match($candidate, $name, $constraint)) {
$matches[] = $candidate;
}
}
return $matches;
}
public function literalToPackage($literal)
{
$packageId = abs($literal);
return $this->packageById($packageId);
}
public function literalToPrettyString($literal, $installedMap)
{
$package = $this->literalToPackage($literal);
if (isset($installedMap[$package->id])) {
$prefix = ($literal > 0 ? 'keep' : 'remove');
} else {
$prefix = ($literal > 0 ? 'install' : 'don\'t install');
}
return $prefix.' '.$package->getPrettyString();
}
/**
* Checks if the package matches the given constraint directly or through
* provided or replaced packages
*
* @param PackageInterface $candidate
* @param string $name Name of the package to be matched
* @param ConstraintInterface $constraint The constraint to verify
* @return bool
*/
public function match($candidate, $name, ConstraintInterface $constraint = null)
{
$candidateName = $candidate->getName();
$candidateVersion = $candidate->getVersion();
if ($candidateName === $name) {
return $constraint === null || CompilingMatcher::match($constraint, Constraint::OP_EQ, $candidateVersion);
}
$provides = $candidate->getProvides();
$replaces = $candidate->getReplaces();
// aliases create multiple replaces/provides for one target so they can not use the shortcut below
if (isset($replaces[0]) || isset($provides[0])) {
foreach ($provides as $link) {
if ($link->getTarget() === $name && ($constraint === null || $constraint->matches($link->getConstraint()))) {
return true;
}
}
foreach ($replaces as $link) {
if ($link->getTarget() === $name && ($constraint === null || $constraint->matches($link->getConstraint()))) {
return true;
}
}
return false;
}
if (isset($provides[$name]) && ($constraint === null || $constraint->matches($provides[$name]->getConstraint()))) {
return true;
}
if (isset($replaces[$name]) && ($constraint === null || $constraint->matches($replaces[$name]->getConstraint()))) {
return true;
}
return false;
}
public function isUnacceptableFixedOrLockedPackage(PackageInterface $package)
{
return \in_array($package, $this->unacceptableFixedOrLockedPackages, true);
}
public function __toString()
{
$str = "Pool:\n";
foreach ($this->packages as $package) {
$str .= '- '.str_pad($package->id, 6, ' ', STR_PAD_LEFT).': '.$package->getName()."\n";
}
return $str;
}
}
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