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<?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;
    }
}