<?php
/**
* Copyright © 2016 Magento. All rights reserved.
* See COPYING.txt for license details.
*/

namespace Magento\Composer;

/**
* Class InfoCommand calls composer info command
*/
class InfoCommand
{
/**
* Current version
*/
const CURRENT_VERSION = 'current_version';

const VERSIONS = 'versions';

/**
* Available versions
*/
const AVAILABLE_VERSIONS = 'available_versions';

/**
* Package name
*/
const NAME = 'name';

/**
* New versions
*/
const NEW_VERSIONS = 'new_versions';


/**
* @var MagentoComposerApplication
*/
protected $magentoComposerApplication;

/**
* Constructor
*
* @param MagentoComposerApplication $magentoComposerApplication
*/
public function __construct(MagentoComposerApplication $magentoComposerApplication)
{
$this->magentoComposerApplication = $magentoComposerApplication;
}

/**
* Runs composer info command
*
* @param string $package
* @param bool $installed
* @return array|bool
*/
public function run($package, $installed = false)
{
$showAllPackages = !$installed;
$commandParameters = [
'command' => 'info',
'package' => $package,
'-i' => $installed,
'--all' => $showAllPackages,
];

try {
$output = $this->magentoComposerApplication->runComposerCommand($commandParameters);
} catch (\RuntimeException $e) {
return false;
}

$rawLines = explode("\n", str_replace("\r\n", "\n", $output));
$result = [];

foreach ($rawLines as $line) {
$chunk = explode(':', $line);
if (count($chunk) === 2) {
$result[trim($chunk[0])] = trim($chunk[1]);
}
}

$result = $this->extractVersions($result);

if (!isset($result[self::NAME]) && isset($result[self::CURRENT_VERSION])) {
$result[self::NAME] = $package;
}

return $result;
}

/**
* Extracts package versions info
*
* @param array $packageInfo
* @return array
*/
private function extractVersions($packageInfo)
{
$versions = explode(', ', $packageInfo[self::VERSIONS]);
$packageInfo[self::NEW_VERSIONS] = [];
$packageInfo[self::AVAILABLE_VERSIONS] = [];

if (count($versions) === 1) {
$packageInfo[self::CURRENT_VERSION] = str_replace('* ', '', $packageInfo[self::VERSIONS]);
} else {
$currentVersion = array_values(preg_grep("/^\*.*/", $versions));
if ($currentVersion) {
$packageInfo[self::CURRENT_VERSION] = str_replace('* ', '', $currentVersion[0]);
} else {
$packageInfo[self::CURRENT_VERSION] = '';
}

$packageInfo[self::AVAILABLE_VERSIONS] = array_values(preg_grep("/^\*.*/", $versions, PREG_GREP_INVERT));
}

if (count($packageInfo[self::AVAILABLE_VERSIONS]) > 0) {
if ($packageInfo[self::CURRENT_VERSION]) {
foreach ($packageInfo[self::AVAILABLE_VERSIONS] as $version) {
if (version_compare($packageInfo[self::CURRENT_VERSION], $version, '<')) {
$packageInfo[self::NEW_VERSIONS][] = $version;
}
}
} else {
$packageInfo[self::NEW_VERSIONS] = $packageInfo[self::AVAILABLE_VERSIONS];
}
}

return $packageInfo;
}
}