<?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\Installer;

use Composer\Repository\InstalledRepositoryInterface;
use Composer\Package\PackageInterface;

/**
* Does not install anything but marks packages installed in the repo
*
* Useful for dry runs
*
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class NoopInstaller implements InstallerInterface
{
/**
* {@inheritDoc}
*/
public function supports($packageType)
{
return true;
}

/**
* {@inheritDoc}
*/
public function isInstalled(InstalledRepositoryInterface $repo, PackageInterface $package)
{
return $repo->hasPackage($package);
}

/**
* {@inheritDoc}
*/
public function install(InstalledRepositoryInterface $repo, PackageInterface $package)
{
if (!$repo->hasPackage($package)) {
$repo->addPackage(clone $package);
}
}

/**
* {@inheritDoc}
*/
public function update(InstalledRepositoryInterface $repo, PackageInterface $initial, PackageInterface $target)
{
if (!$repo->hasPackage($initial)) {
throw new \InvalidArgumentException('Package is not installed: '.$initial);
}

$repo->removePackage($initial);
if (!$repo->hasPackage($target)) {
$repo->addPackage(clone $target);
}
}

/**
* {@inheritDoc}
*/
public function uninstall(InstalledRepositoryInterface $repo, PackageInterface $package)
{
if (!$repo->hasPackage($package)) {
throw new \InvalidArgumentException('Package is not installed: '.$package);
}
$repo->removePackage($package);
}

/**
* {@inheritDoc}
*/
public function getInstallPath(PackageInterface $package)
{
$targetDir = $package->getTargetDir();

return $package->getPrettyName() . ($targetDir ? '/'.$targetDir : '');
}
}