<?php
/**
 * PHP Server Monitor
 * Monitor your servers and websites.
 *
 * This file is part of PHP Server Monitor.
 * PHP Server Monitor is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PHP Server Monitor 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PHP Server Monitor.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @package     phpservermon
 * @author      Pepijn Over <pep@mailbox.org>
 * @copyright   Copyright (c) 2008-2017 Pepijn Over <pep@mailbox.org>
 * @license     http://www.gnu.org/licenses/gpl.txt GNU GPL v3
 * @version     Release: @package_version@
 * @link        http://www.phpservermonitor.org/
 * @since       phpservermon 3.1
 **/

namespace psm\Util\Server;

/**
 * Makes sure all data of servers is being archived properly or removed if necessary.
 */
class ArchiveManager {

	/**
	 * Available archiver utils.
	 * @var array $archivers
	 */
	protected $archivers = array();

	/**
	 * Database service
	 * @var \psm\Service\Database $db
	 */
	protected $db;

	/**
	 * Retention period
	 * @var \DateInterval $retention_period
	 * @see setRetentionPeriod()
	 */
	protected $retention_period;

	public function __construct(\psm\Service\Database $db) {
		$this->db = $db;

		$this->setRetentionPeriod(psm_get_conf('log_retention_period', 365));

		$this->archivers[] = new Archiver\UptimeArchiver($db);
		$this->archivers[] = new Archiver\LogsArchiver($db);
	}

	/**
	 * Archive one or more servers.
	 * @param int $server_id
	 * @return boolean
	 */
	public function archive($server_id = null) {
		$result = true;
		foreach($this->archivers as $archiver) {
			if(!$archiver->archive($server_id)) {
				$result = false;
			}
		}
		return $result;
	}

	/**
	 * Cleanup old records for one or more servers
	 * @param int $server_id
	 * @return boolean
	 */
	public function cleanup($server_id = null) {
		$result = true;
		if(!$this->retention_period) {
			// cleanup is disabled
			return $result;
		}
		$retdate = new \DateTime();
		$retdate->sub($this->retention_period);

		foreach($this->archivers as $archiver) {
			if(!$archiver->cleanup($retdate, $server_id)) {
				$result = false;
			}
		}
		return $result;
	}

	/**
	 * Set retention period for this archive run.
	 *
	 * Set period to 0 to disable cleanup altogether.
	 * @param \DateInterval|int $period \DateInterval object or number of days (int)
	 * @return \psm\Util\Server\ArchiveManager
	 */
	public function setRetentionPeriod($period) {
		if(is_object($period) && $period instanceof \DateInterval) {
			$this->retention_period = $period;
		} elseif(intval($period) == 0) {
			// cleanup disabled
			$this->retention_period = false;
		} else {
			$this->retention_period = new \DateInterval('P' . intval($period) . 'D');
		}
		return $this;
	}
}