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<?php
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Andreas Fischer <bantu@owncloud.com>
 * @author Christopher Schäpers <kondou@ts.unde.re>
 * @author Clark Tomlinson <fallen013@gmail.com>
 * @author Joas Schilling <coding@schilljs.com>
 * @author Laurens Post <lkpost@scept.re>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Roeland Jago Douma <roeland@famdouma.nl>
 * @author Sujith H <sharidasan@owncloud.com>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OC\Core\Command\User;

use OCP\IUserManager;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Helper\QuestionHelper;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Question\ConfirmationQuestion;
use Symfony\Component\Console\Question\Question;

class ResetPassword extends Command {

	/** @var IUserManager */
	protected $userManager;

	public function __construct(IUserManager $userManager) {
		$this->userManager = $userManager;
		parent::__construct();
	}

	protected function configure() {
		$this
			->setName('user:resetpassword')
			->setDescription('Resets the password of the named user')
			->addArgument(
				'user',
				InputArgument::REQUIRED,
				'Username to reset password'
			)
			->addOption(
				'password-from-env',
				null,
				InputOption::VALUE_NONE,
				'read password from environment variable OC_PASS'
			)
		;
	}

	protected function execute(InputInterface $input, OutputInterface $output) {
		$username = $input->getArgument('user');

		/** @var $user \OCP\IUser */
		$user = $this->userManager->get($username);
		if (is_null($user)) {
			$output->writeln('<error>User does not exist</error>');
			return 1;
		}

		if ($input->getOption('password-from-env')) {
			$password = getenv('OC_PASS');
			if (!$password) {
				$output->writeln('<error>--password-from-env given, but OC_PASS is empty!</error>');
				return 1;
			}
		} elseif ($input->isInteractive()) {
			/** @var QuestionHelper $helper */
			$helper = $this->getHelper('question');

			if (\OCP\App::isEnabled('encryption')) {
				$output->writeln(
					'<error>Warning: Resetting the password when using encryption will result in data loss!</error>'
				);

				$question = new ConfirmationQuestion('Do you want to continue?');
				if (!$helper->ask($input, $output, $question)) {
					return 1;
				}
			}

			$question = new Question('Enter a new password: ');
			$question->setHidden(true);
			$password = $helper->ask($input, $output, $question);

			if ($password === null) {
				$output->writeln("<error>Password cannot be empty!</error>");
				return 1;
			}

			$question = new Question('Confirm the new password: ');
			$question->setHidden(true);
			$confirm = $helper->ask($input, $output, $question);

			if ($password !== $confirm) {
				$output->writeln("<error>Passwords did not match!</error>");
				return 1;
			}
		} else {
			$output->writeln("<error>Interactive input or --password-from-env is needed for entering a new password!</error>");
			return 1;
		}


		try {
			$success = $user->setPassword($password);
		} catch (\Exception $e) {
			$output->writeln('<error>' . $e->getMessage() . '</error>');
			return 1;
		}

		if ($success) {
			$output->writeln("<info>Successfully reset password for " . $username . "</info>");
		} else {
			$output->writeln("<error>Error while resetting password!</error>");
			return 1;
		}
	}
}