* @copyright 2009 by RalfBecker@outdoor-training.de * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License * @version $Id$ */ /** * EGroupware time and timezone handling class extending PHP's DateTime * * egw_time class knows 2 timezones: * 1. egw_time::$user_timezone timezone of the user, defined in his prefs $GLOBALS['egw_info']['user']['preferences']['common']['tz'] * 2. egw_time::$server_timezone timezone of the server, read via date_default_timezone_get() * * The class extends PHP5.2's DateTime object to: * - format date and time according to format in user prefs ($type===true: date, $type===false: time, $type==='' date+time) * - defaulting to a user timezone according to user prefs (not server timezone as DateTime!) * - deal with integer unix timestamps and DB timestamps in server-time ($type: 'ts'='integer' or 'server' timestamp in servertime) * * There are two static methods for simple conversation between server and user time: * - egw_time::server2user($time,$type=null) * - egw_time::user2server($time,$type=null) * (Replacing in 1.6 and previous used adding of tz_offset, which is only correct for current time) * * An other static method allows to format any time in several ways: egw_time::to($time,$type) (exceed date($type,$time)). * * The constructor of egw_time understand - in addition to DateTime - integer timestamps, array with values for * keys: ('year', 'month', 'day') or 'full' plus 'hour', 'minute' and optional 'second' or a DateTime object as parameter. * It defaults to user-time, not server time as DateTime! * * The constructor itself throws an Exception in that case (to be precise it does not handle the one thrown by DateTime constructor). * Static methods server2user, user2server and to return NULL, if given time could not be parsed. * * @link http://www.php.net/manual/en/class.datetime.php * @link http://www.php.net/manual/en/class.datetimezone.php */ class egw_time extends DateTime { /** * Database timestamp format: Y-m-d H:i:s */ const DATABASE = 'Y-m-d H:i:s'; /** * DateTimeZone of server, read via date_default_timezone_get(), set by self::init() * * @var DateTimeZone */ static public $server_timezone; /** * DateTimeZone of user, read from user prefs, set by self::init() or self::setUserPrefs() * * @var DateTimeZone */ static public $user_timezone; /** * Time format from user prefs, set by self::setUserPrefs() * * @var string */ static public $user_timeformat = 'H:i'; /** * Date format from user prefs, set by self::setUserPrefs() * * @var string */ static public $user_dateformat = 'Y-m-d'; /** * Constructor * * @param int|string|array|DateTime $time='now' integer timestamp, string with date+time, DateTime object or * array with values for keys('year','month','day') or 'full' plus 'hour','minute' and optional 'second' * @param DateTimeZone $tz=null timezone, default user time (PHP DateTime default to server time!) * @param string &$type=null on return type of $time (optional) * @throws Exception if $time can NOT be parsed * @return egw_time */ public function __construct($time='now',DateTimeZone $tz=null,&$type=null) { if (is_null($tz)) $tz = self::$user_timezone; // default user timezone switch(($type = gettype($time))) { case 'NULL': case 'boolean': // depricated use in calendar for 'now' $time = 'now'; $type = 'string'; // fall through case 'string': if (!(is_numeric($time) && ($time > 21000000 || $time < 19000000))) { if (is_numeric($time) && strlen($time) == 8) $time .= 'T000000'; // 'Ymd' string used in calendar to represent a date // $time ending in a Z (Zulu or UTC time), is unterstood by DateTime class itself parent::__construct($time,$tz); break; } $type = 'integer'; // fall through for timestamps case 'integer': /* ToDo: Check if PHP5.3 setTimestamp does the same, or always expects UTC timestamp if (PHP_VERSION >= 5.3) { parent::__construct('now',$tz); $datetime->setTimestamp($time); } else*/ { parent::__construct(date('Y-m-d H:i:s',$time),$tz); } break; case 'array': parent::__construct('now',$tz); if (isset($time['Y'])) // array format used in eTemplate { $time = array( 'year' => $time['Y'], 'month' => $time['m'], 'day' => $time['d'], 'hour' => $time['H'], 'minute' => $time['i'], 'second' => $time['s'], ); } if (!empty($time['full']) && empty($time['year'])) { $time['year'] = (int)substr($time['full'],0,4); $time['month'] = (int)substr($time['full'],4,2); $time['day'] = (int)substr($time['full'],6,2); } if (isset($time['year'])) $this->setDate((int)$time['year'],(int)$time['month'],isset($time['day']) ? (int)$time['day'] : (int)$time['mday']); $this->setTime((int)$time['hour'],(int)$time['minute'],(int)$time['second']); break; case 'object': if (is_a($time,'DateTime')) { parent::__construct($time->format('Y-m-d H:i:s'),$time->getTimezone()); $this->setTimezone($tz); break; } // fall through default: throw new egw_exception_assertion_failed("Not implemented for type ($type)$time!"); } } /** * Set user timezone, according to user prefs: converts current time to user time * * Does nothing if self::$user_timezone is current timezone! */ public function setUser() { $this->setTimezone(self::$user_timezone); } /** * Set server timezone: converts current time to server time * * Does nothing if self::$server_timezone is current timezone! */ public function setServer() { $this->setTimezone(self::$server_timezone); } /** * Format DateTime object as a specific type or string * * @param string $type='' 'integer'|'ts'=timestamp, 'server'=timestamp in servertime, 'string'='Y-m-d H:i:s', 'object'=DateTime, * 'array'=array with values for keys ('year','month','day','hour','minute','second','full','raw') or string with format * true = date only, false = time only as in user prefs, '' = date+time as in user prefs * @return int|string|array|datetime see $type */ public function format($type='') { switch((string)$type) { case '': // empty string: date and time as in user prefs //case '': // boolean false: time as in user prefs case '1': // boolean true: date as in user prefs if (is_bool($type)) { $type = $type ? self::$user_dateformat : self::$user_timeformat; } else { $type = self::$user_dateformat.', '.self::$user_timeformat; } break; case 'string': $type = self::DATABASE; break; case 'server': // timestamp in servertime $this->setServer(); // fall through case 'integer': case 'ts': // ToDo: Check if PHP5.3 getTimestamp does the same, or always returns UTC timestamp return mktime(parent::format('H'),parent::format('i'),parent::format('s'),parent::format('m'),parent::format('d'),parent::format('Y')); case 'object': case 'datetime': case 'egw_time': return clone($this); case 'array': $arr = array( 'year' => (int)parent::format('Y'), 'month' => (int)parent::format('m'), 'day' => (int)parent::format('d'), 'hour' => (int)parent::format('H'), 'minute' => (int)parent::format('i'), 'second' => (int)parent::format('s'), 'full' => parent::format('Ymd'), ); $arr['raw'] = mktime($arr['hour'],$arr['minute'],$arr['second'],$arr['month'],$arr['day'],$arr['year']); return $arr; case 'date_array': // array with short keys used by date: Y, m, d, H, i, s (used in eTemplate) return array( 'Y' => (int)parent::format('Y'), 'm' => (int)parent::format('m'), 'd' => (int)parent::format('d'), 'H' => (int)parent::format('H'), 'i' => (int)parent::format('i'), 's' => (int)parent::format('s'), ); } // default $type contains string with format return parent::format($type); } /** * Cast object to a string * * @return string */ public function __toString() { return $this->format(self::DATABASE); } /** * Convert a server time into a user time * * @param int|string|array|DateTime $time * @param string $type=null type or return-value, default (null) same as $time * @return int|string|array|datetime null if time could not be parsed */ public static function server2user($time,$type=null) { if (!is_a($time,$typeof='egw_time')) { try { $time = new egw_time($time,self::$server_timezone,$typeof); } catch(Exception $e) { return null; // time could not be parsed } } $time->setUser(); if (is_null($type)) $type = $typeof; //echo "

".__METHOD__."($time,$type) = ".print_r($format->format($type),true)."

\n"; return $time->format($type); } /** * Convert a user time into a server time * * @param int|string|array|datetime $time * @param string $type=null type or return-value, default (null) same as $time * @return int|string|array|datetime null if time could not be parsed */ public static function user2server($time,$type=null) { if (!is_a($time,$typeof='egw_time')) { try { $time = new egw_time($time,self::$user_timezone,$typeof); } catch(Exception $e) { return null; // time could not be parsed } } $time->setServer(); if (is_null($type)) $type = $typeof; //echo "

".__METHOD__."($time,$type) = ".print_r($format->format($type),true)."

\n"; return $time->format($type); } /** * Convert time to a specific format or string, static version of egw_time::format() * * @param int|string|array|DateTime $time='now' see constructor * @param string $type='' 'integer'|'ts'=timestamp, 'server'=timestamp in servertime, 'string'='Y-m-d H:i:s', 'object'=DateTime, * 'array'=array with values for keys ('year','month','day','hour','minute','second','full','raw') or string with format * true = date only, false = time only as in user prefs, '' = date+time as in user prefs * @return int|string|array|datetime see $type, null if time could not be parsed */ public static function to($time='now',$type='') { if (!is_a($time,'egw_time')) { try { $time = new egw_time($time); } catch(Exception $e) { return null; // time could not be parsed } } return $time->format($type); } /** * Setter for user timezone, should be called after reading user preferences * * @param string $tz timezone, eg. 'Europe/Berlin' or 'UTC' * @param string $dateformat='' eg. 'Y-m-d' or 'd.m.Y' * @param string|int $timeformat='' integer 12, 24, or format string eg. 'H:i' * @throws egw_exception_wrong_userinput if invalid $tz parameter * @return DateTimeZone */ public static function setUserPrefs($tz,$dateformat='',$timeformat='') { //echo "

".__METHOD__."('$tz','$dateformat','$timeformat') ".function_backtrace()."

\n"; if (!empty($dateformat)) self::$user_dateformat = $dateformat; switch($timeformat) { case '': break; case '24': self::$user_timeformat = 'H:i'; break; case '12': self::$user_timeformat = 'h:i a'; break; default: self::$user_timeformat = $timeformat; break; } try { self::$user_timezone = new DateTimeZone($tz); } catch(Exception $e) { throw new egw_exception_wrong_userinput(lang('You need to %1set your timezone preference%2.','','')); } return self::$user_timezone; } /** * Get offset in seconds between user and server time at given time $time * * Compatibility method for old code. It is only valid for the given time, because of possible daylight saving changes! * * @param int|string|DateTime $time='now' * @return int difference in seconds between user and server time (for the given time!) */ public static function tz_offset_s($time='now') { if (!is_a($time,'DateTime')) $time = new egw_time($time); return egw_time::$user_timezone->getOffset($time) - egw_time::$server_timezone->getOffset($time); } /** * Init static variables, reading user prefs */ public static function init() { self::$server_timezone = new DateTimeZone(date_default_timezone_get()); if (isset($GLOBALS['egw_info']['user']['preferences']['common']['tz'])) { self::setUserPrefs($GLOBALS['egw_info']['user']['preferences']['common']['tz'], $GLOBALS['egw_info']['user']['preferences']['common']['dateformat'], $GLOBALS['egw_info']['user']['preferences']['common']['timeformat']); } else { self::$user_timezone = clone(self::$server_timezone); } } /** * Return "beautified" timezone list: * - no depricated timezones * - return UTC and oceans at the end * - if (user lang is a european language), move Europe to top * * @return array continent|ocean => array(tz-name => tz-label incl. current time) */ public static function getTimezones() { // prepare list of timezones from php, ignoring depricated ones and sort as follows $tzs = array( 'Africa' => array(), // Contients 'America' => array(), 'Asia' => array(), 'Australia' => array(), 'Europe' => array(), 'Atlantic' => array(), // Oceans 'Pacific' => array(), 'Indian' => array(), 'Antarctica' => array(), // Poles 'Arctic' => array(), 'UTC' => array('UTC' => 'UTC'), ); // no VTIMEZONE available in calendar_timezones --> do NOT return them static $no_vtimezone = array( 'Europe/Tiraspol', 'America/Atka', 'America/Buenos_Aires', 'America/Catamarca', 'America/Coral_Harbour', 'America/Cordoba', 'America/Ensenada', 'America/Fort_Wayne', 'America/Indianapolis', 'America/Jujuy', 'America/Knox_IN', 'America/Mendoza', 'America/Porto_Acre', 'America/Rosario', 'America/Virgin', 'Asia/Ashkhabad', 'Asia/Beijing', 'Asia/Chungking', 'Asia/Dacca', 'Asia/Macao', 'Asia/Riyadh87', 'Asia/Riyadh88', 'Asia/Riyadh89', 'Asia/Tel_Aviv', 'Asia/Thimbu', 'Asia/Ujung_Pandang', 'Asia/Ulan_Bator', 'Australia/ACT', 'Australia/Canberra', 'Australia/LHI', 'Australia/North', 'Australia/NSW', 'Australia/Queensland', 'Australia/South', 'Australia/Tasmania', 'Australia/Victoria', 'Australia/West', 'Australia/Yancowinna', 'Pacific/Samoa', ); foreach(DateTimeZone::listIdentifiers() as $name) { if (in_array($name,$no_vtimezone)) continue; // do NOT allow to set in EGroupware, as we have not VTIMEZONE component for it list($continent,$rest) = explode('/',$name,2); if (!isset($tzs[$continent])) continue; // old depricated timezones $datetime = new egw_time('now',new DateTimeZone($name)); $tzs[$continent][$name] = str_replace(array('_','/'),array(' ',' / '),$name).'   '.$datetime->format(); unset($datetime); } foreach($tzs as $continent => &$data) { natcasesort($data); // sort cities } unset($data); // if user lang or installed langs contain a european language --> move Europe to top of tz list $langs = translation::get_installed_langs(); if (array_intersect(array($GLOBALS['egw_info']['user']['preferences']['common']['lang'])+array_keys($langs), array('de','fr','it','nl','bg','ca','cs','da','el','es-es','et','eu','fi','hr','hu','lt','no','pl','pt','sk','sl','sv','tr','uk'))) { $tzs = array_merge(array('Europe' => $tzs['Europe']),$tzs); } return $tzs; } /** * Get user timezones (the ones user selected in his prefs), plus evtl. an extra one * * @param string $extra extra timezone to add, if not already included in user timezones * @return array tzid => label */ public static function getUserTimezones($extra=null) { $tz = $GLOBALS['egw_info']['user']['preferences']['common']['tz']; $user_tzs = explode(',',$GLOBALS['egw_info']['user']['preferences']['common']['tz_selection']); if (count($user_tzs) <= 1) { $user_tzs = $tz ? array($tz) : array(); } if ($tz && !in_array($tz,$user_tzs)) { $user_tzs = array_merge(array($tz),$user_tzs); } if (!$user_tzs) // if we have no user timezones, eg. user set no pref --> use server default { $user_tzs = array(date_default_timezone_get()); } if ($extra && !in_array($extra,$user_tzs)) { $user_tzs = array_merge(array($extra),$user_tzs); } $user_tzs = array_combine($user_tzs,$user_tzs); foreach($user_tzs as $name => &$label) { $label = str_replace(array('_','/'),array(' ',' / '),$label); } //_debug_array($user_tzs); return $user_tzs; } } egw_time::init(); /* if (isset($_SERVER['SCRIPT_FILENAME']) && $_SERVER['SCRIPT_FILENAME'] == __FILE__) // some tests { // test timestamps/dates before 1970 foreach(array('19690811',-3600,'-119322000') as $ts) { try { echo "

egw_time::to($ts,'Y-m-d H:i:s')=".egw_time::to($ts,'Y-m-d H:i:s')."

\n"; $et = new egw_time($ts); echo "

egw_time($ts)->format('Y-m-d H:i:s')=".$et->format('Y-m-d H:i:s')."

\n"; $dt = new DateTime($ts); echo "

DateTime($ts)->format('Y-m-d H:i:s')=".$dt->format('Y-m-d H:i:s')."

\n"; } catch(Exception $e) { echo "

Exception: ".$e->getMessage()."

\n"; } } // user time is UTC echo "

user timezone = ".($GLOBALS['egw_info']['user']['preferences']['common']['tz'] = 'UTC').", server timezone = ".date_default_timezone_get()."

\n"; $time = time(); echo "

time=$time=".date('Y-m-d H:i:s',$time)."(server) =".egw_time::server2user($time,'Y-m-d H:i:s')."(user) =".egw_time::server2user($time,'ts')."(user)=".date('Y-m-d H:i:s',egw_time::server2user($time,'ts'))."

\n"; echo "egw_time::to(array('full' => '20091020', 'hour' => 12, 'minute' => 0))='".egw_time::to(array('full' => '20091020', 'hour' => 12, 'minute' => 0))."'

\n"; $ts = egw_time::to(array('full' => '20091027', 'hour' => 10, 'minute' => 0),'ts'); echo "

2009-10-27 10h UTC timestamp=$ts --> server time = ".egw_time::user2server($ts,'')." --> user time = ".egw_time::server2user(egw_time::user2server($ts),'')."

\n"; $ts = egw_time::to(array('full' => '20090627', 'hour' => 10, 'minute' => 0),'ts'); echo "

2009-06-27 10h UTC timestamp=$ts --> server time = ".egw_time::user2server($ts,'')." --> user time = ".egw_time::server2user(egw_time::user2server($ts),'')."

\n"; } */