<?php
/**
 * @copyright Copyright (c) 2017, ownCloud GmbH
 *
 * @author Morris Jobke <hey@morrisjobke.de>
 *
 * @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\Migration;

use OCP\Migration\IOutput;
use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * Class SimpleOutput
 *
 * Just a simple IOutput implementation with writes messages to the log file.
 * Alternative implementations will write to the console or to the web ui (web update case)
 *
 * @package OC\Migration
 */
class ConsoleOutput implements IOutput {
	/** @var OutputInterface */
	private $output;

	/** @var ProgressBar */
	private $progressBar;

	public function __construct(OutputInterface $output) {
		$this->output = $output;
	}

	/**
	 * @param string $message
	 */
	public function info($message) {
		$this->output->writeln("<info>$message</info>");
	}

	/**
	 * @param string $message
	 */
	public function warning($message) {
		$this->output->writeln("<comment>$message</comment>");
	}

	/**
	 * @param int $max
	 */
	public function startProgress($max = 0) {
		if (!is_null($this->progressBar)) {
			$this->progressBar->finish();
		}
		$this->progressBar = new ProgressBar($this->output);
		$this->progressBar->start($max);
	}

	/**
	 * @param int $step
	 * @param string $description
	 */
	public function advance($step = 1, $description = '') {
		if (is_null($this->progressBar)) {
			$this->progressBar = new ProgressBar($this->output);
			$this->progressBar->start();
		}
		$this->progressBar->advance($step);
		if (!is_null($description)) {
			$this->output->write(" $description");
		}
	}

	public function finishProgress() {
		if (is_null($this->progressBar)) {
			return;
		}
		$this->progressBar->finish();
	}
}