[webcal.git] / utils / dateformat.class.php

<?php

include_once 'config.inc.php';
require_once 'helper.php';

class DateFormat {
/*      private $tz;
        
        function __construct($tz = '') {
                if (empty($tz)) {
                        $tz = ($_SESSION['user_settings']->getTimeZone() !== NULL) ?
            $_SESSION['user_settings']->getTimeZone() : TIMEZONE;
                }
                $timezone = date_default_timezone_get();
                $tz_server = date("Z")/3600;
                date_default_timezone_set($tz);
                $tz_client = date("Z")/3600;
                date_default_timezone_set($timezone);
                $this->tz = $tz_client - $tz_server;
                print "$timezone:$tz_server:$tz_client<br/>";
        }*/
        
        public function client2UTC($datetime) {
                if (strcasecmp(substr($datetime, -1), "Z") === 0) {
                        // Time is in UTC already
                        return $datetime;
                }
                
        $timestamp = strtotime($datetime);
        
        return gmdate("Ymd\THis\Z", $timestamp);
    }
    
    public function UTC2Client($datetime) {
                //print "UTC2Client: $datetime\n";
                if (strcasecmp(substr($datetime, -1), "Z") !== 0) {
                        // Time is not in UTC
                        return $datetime;
                }
                
        $timestamp = strtotime($datetime);
        
        return date("Ymd\THis", $timestamp);
        }

    public function UTC2Local($datetime) {
                if (strcasecmp(substr($datetime, -1), "Z") !== 0) {
                        // Time is not in UTC
                        return $datetime;
                }

                $offset = $_SESSION['timezone_offset'] - date("Z");
        $timestamp = strtotime($datetime) + $offset;
        
        return date("Ymd\THis", $timestamp);
        }

}