<?php

require_once 'dbutils.php';
require_once 'config.php';

class System {
	public static function checkLastOsAccess($pdo) {
		$timezone = self::getTimeZone($pdo);
		date_default_timezone_set($timezone);

		$sql = "SELECT date FROM %gueststatus% WHERE item=?";
		$result = DbUtils::fetchSqlAll($pdo, $sql, array('lastosaccess'));
		
		if (count($result) == 0) {
			$msg = "0";
		} else {
			$lastaccess = $result[0]["date"];

			$date = new DateTime();
			$currentTimeStamp = $date->getTimestamp();

			if (($currentTimeStamp - $lastaccess) > 60) {
				$msg = 0;
			} else {
				$msg = 1;
			}
		}
		return array("status" => "OK","msg" => $msg);
	}
	
	public static function getTimeZone($pdo) {
		$sql = "select value from %ossystem% where item=?";
		$result = DbUtils::fetchSqlAll($pdo, $sql, array("timezone"));
		if (count($result) == 1) {
			return $result[0]["value"];
		} else {
			return "Europe/Berlin";
		}
	}
}

if (isset($_GET["command"])) {
	$command = $_GET["command"];
	
	$pdo = DbUtils::openDbAndReturnPdoStatic();
	
	switch ($command) {
		case "getlastosaccess":
			$ret = System::checkLastOsAccess($pdo);
			echo json_encode($ret);
			break;

		default:
			break;
	}
}