<?php
/*
 * This file is part of the Magallanes package.
*
* (c) Andrés Montañez <andres@andresmontanez.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Mage\Command\BuiltIn;

use Mage\Command\AbstractCommand;
use Mage\Console;

/**
 * Upgrades the Magallanes Version on the Local System
 *
 * @author Andrés Montañez <andres@andresmontanez.com>
 */
class UpgradeCommand extends AbstractCommand
{
    /**
     * Source for downloading
     * @var string
     */
    const DOWNLOAD = 'http://download.magephp.com/magallanes.{version}.tar.gz';

    /**
     * JSON for Upgrade
     * @var string
     */
    const UPGRADE = 'http://download.magephp.com/upgrade.json';

    /**
     * Command for Upgrading Magallanes
     * @see \Mage\Command\BuiltIn\InstallCommand::run()
     */
    public function run()
    {
        $exitCode = 99;
        Console::output('Upgrading <bold>Magallanes</bold> ... ', 1, 0);

        $user = '';
        // Check if user is root
        Console::executeCommand('whoami', $user);
        $owner = posix_getpwuid(fileowner(__FILE__));
        $owner = $owner['name'];

        if ($user != 'root' && $user != $owner) {
            Console::output('<red>FAIL</red>', 0, 1);
            Console::output('You need to be the <bold>' . $owner . '</bold> user to perform the upgrade, or <bold>root</bold>.', 2);

        } else {
            // Check version
            $version = json_decode(file_get_contents(self::UPGRADE));

            if ($version !== false && $version !== null) {
                $versionCompare = version_compare(MAGALLANES_VERSION, $version->latest);
                if ($versionCompare == 0) {
                    Console::output('<yellow>SKIP</yellow>', 0, 1);
                    Console::output('Your current version is up to date.', 2);
                    $exitCode = 0;

                } else if ($versionCompare == 1) {
                    Console::output('<yellow>SKIP</yellow>', 0, 1);
                    Console::output('Your current version is newer.', 2);
                    $exitCode = 0;

                } else if ($versionCompare == -1) {
                    // Download Package
                    $tarball = file_get_contents(str_replace('{version}', $version->latest, self::DOWNLOAD));
                    if ($tarball === false) {
                        Console::output('<red>FAIL</red>', 0, 1);
                        Console::output('Corrupted download.', 2);

                    } else {
                        $tarballFile = tempnam('/tmp', 'magallanes_download');
                        rename($tarballFile, $tarballFile . '.tar.gz');
                        $tarballFile .= '.tar.gz';
                        file_put_contents($tarballFile, $tarball);

                        Console::executeCommand('rm -rf ' . MAGALLANES_DIRECTORY);
                        Console::executeCommand('cd ' . dirname($tarballFile) . ' && tar xfz ' . $tarballFile);
                        Console::executeCommand('mv ' . dirname($tarballFile) . '/magallanes ' . MAGALLANES_DIRECTORY);

                        Console::output('<green>OK</green>', 0, 1);
                        $exitCode = 0;
                    }

                } else {
                    Console::output('<red>FAIL</red>', 0, 1);
                    Console::output('Invalid version.', 2);
                }
            } else {
                Console::output('<red>FAIL</red>', 0, 1);
                Console::output('Invalid version.', 2);
            }
        }

        return $exitCode;
    }
}