forked from extern/egroupware
568 lines
18 KiB
PHP
568 lines
18 KiB
PHP
<?php
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/**
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* EGroupware time and timezone handling
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*
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* @package api
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* @link http://www.egroupware.org
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* @author Ralf Becker <RalfBecker@outdoor-training.de>
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* @copyright 2009 by RalfBecker@outdoor-training.de
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @version $Id$
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*/
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/**
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* EGroupware time and timezone handling class extending PHP's DateTime
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*
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* egw_time class knows 2 timezones:
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* 1. egw_time::$user_timezone timezone of the user, defined in his prefs $GLOBALS['egw_info']['user']['preferences']['common']['tz']
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* 2. egw_time::$server_timezone timezone of the server, read via date_default_timezone_get()
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*
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* The class extends PHP5.2's DateTime object to:
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* - format date and time according to format in user prefs ($type===true: date, $type===false: time, $type==='' date+time)
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* - defaulting to a user timezone according to user prefs (not server timezone as DateTime!)
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* - deal with integer unix timestamps and DB timestamps in server-time ($type: 'ts'='integer' or 'server' timestamp in servertime)
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*
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* There are two static methods for simple conversation between server and user time:
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* - egw_time::server2user($time,$type=null)
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* - egw_time::user2server($time,$type=null)
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* (Replacing in 1.6 and previous used adding of tz_offset, which is only correct for current time)
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*
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* An other static method allows to format any time in several ways: egw_time::to($time,$type) (exceed date($type,$time)).
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*
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* The constructor of egw_time understand - in addition to DateTime - integer timestamps, array with values for
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* keys: ('year', 'month', 'day') or 'full' plus 'hour', 'minute' and optional 'second' or a DateTime object as parameter.
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* It defaults to user-time, not server time as DateTime!
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*
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* The constructor itself throws an Exception in that case (to be precise it does not handle the one thrown by DateTime constructor).
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* Static methods server2user, user2server and to return NULL, if given time could not be parsed.
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*
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* @link http://www.php.net/manual/en/class.datetime.php
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* @link http://www.php.net/manual/en/class.datetimezone.php
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*/
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class egw_time extends DateTime
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{
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/**
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* Database timestamp format: Y-m-d H:i:s
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*/
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const DATABASE = 'Y-m-d H:i:s';
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/**
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* DateTimeZone of server, read via date_default_timezone_get(), set by self::init()
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*
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* @var DateTimeZone
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*/
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static public $server_timezone;
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/**
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* DateTimeZone of user, read from user prefs, set by self::init() or self::setUserPrefs()
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*
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* @var DateTimeZone
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*/
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static public $user_timezone;
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/**
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* Time format from user prefs, set by self::setUserPrefs()
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*
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* @var string
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*/
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static public $user_timeformat = 'H:i';
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/**
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* Date format from user prefs, set by self::setUserPrefs()
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*
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* @var string
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*/
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static public $user_dateformat = 'Y-m-d';
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/**
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* Constructor
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*
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* @param int|string|array|DateTime $time='now' integer timestamp, string with date+time, DateTime object or
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* array with values for keys('year','month','day') or 'full' plus 'hour','minute' and optional 'second'
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* @param DateTimeZone $tz=null timezone, default user time (PHP DateTime default to server time!)
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* @param string &$type=null on return type of $time (optional)
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* @throws Exception if $time can NOT be parsed
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* @return egw_time
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*/
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public function __construct($time='now',DateTimeZone $tz=null,&$type=null)
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{
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if (is_null($tz)) $tz = self::$user_timezone; // default user timezone
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switch(($type = gettype($time)))
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{
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case 'NULL':
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case 'boolean': // depricated use in calendar for 'now'
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$time = 'now';
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$type = 'string';
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// fall through
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case 'string':
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if (!(is_numeric($time) && ($time > 21000000 || $time < 19000000)))
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{
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if (is_numeric($time) && strlen($time) == 8) $time .= 'T000000'; // 'Ymd' string used in calendar to represent a date
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// $time ending in a Z (Zulu or UTC time), is unterstood by DateTime class itself
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parent::__construct($time,$tz);
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break;
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}
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$type = 'integer';
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// fall through for timestamps
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case 'integer':
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/* ToDo: Check if PHP5.3 setTimestamp does the same, or always expects UTC timestamp
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if (PHP_VERSION >= 5.3)
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{
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parent::__construct('now',$tz);
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$datetime->setTimestamp($time);
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}
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else*/
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{
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parent::__construct(date('Y-m-d H:i:s',$time),$tz);
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}
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break;
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case 'array':
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parent::__construct('now',$tz);
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if (isset($time['Y'])) // array format used in eTemplate
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{
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$time = array(
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'year' => $time['Y'],
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'month' => $time['m'],
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'day' => $time['d'],
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'hour' => $time['H'],
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'minute' => $time['i'],
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'second' => $time['s'],
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);
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}
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if (!empty($time['full']) && empty($time['year']))
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{
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$time['year'] = (int)substr($time['full'],0,4);
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$time['month'] = (int)substr($time['full'],4,2);
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$time['day'] = (int)substr($time['full'],6,2);
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}
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if (isset($time['year'])) $this->setDate((int)$time['year'],(int)$time['month'],isset($time['day']) ? (int)$time['day'] : (int)$time['mday']);
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$this->setTime((int)$time['hour'],(int)$time['minute'],(int)$time['second']);
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break;
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case 'object':
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if (is_a($time,'DateTime'))
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{
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parent::__construct($time->format('Y-m-d H:i:s'),$time->getTimezone());
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$this->setTimezone($tz);
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break;
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}
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// fall through
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default:
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throw new egw_exception_assertion_failed("Not implemented for type ($type)$time!");
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}
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}
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/**
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* Set user timezone, according to user prefs: converts current time to user time
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*
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* Does nothing if self::$user_timezone is current timezone!
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*/
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public function setUser()
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{
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$this->setTimezone(self::$user_timezone);
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}
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/**
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* Set server timezone: converts current time to server time
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*
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* Does nothing if self::$server_timezone is current timezone!
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*/
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public function setServer()
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{
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$this->setTimezone(self::$server_timezone);
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}
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/**
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* Format DateTime object as a specific type or string
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*
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* @param string $type='' 'integer'|'ts'=timestamp, 'server'=timestamp in servertime, 'string'='Y-m-d H:i:s', 'object'=DateTime,
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* 'array'=array with values for keys ('year','month','day','hour','minute','second','full','raw') or string with format
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* true = date only, false = time only as in user prefs, '' = date+time as in user prefs
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* @return int|string|array|datetime see $type
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*/
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public function format($type='')
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{
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switch((string)$type)
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{
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case '': // empty string: date and time as in user prefs
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//case '': // boolean false: time as in user prefs
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case '1': // boolean true: date as in user prefs
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if (is_bool($type))
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{
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$type = $type ? self::$user_dateformat : self::$user_timeformat;
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}
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else
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{
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$type = self::$user_dateformat.', '.self::$user_timeformat;
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}
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break;
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case 'string':
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$type = self::DATABASE;
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break;
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case 'server': // timestamp in servertime
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$this->setServer();
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// fall through
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case 'integer':
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case 'ts':
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// ToDo: Check if PHP5.3 getTimestamp does the same, or always returns UTC timestamp
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return mktime(parent::format('H'),parent::format('i'),parent::format('s'),parent::format('m'),parent::format('d'),parent::format('Y'));
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case 'object':
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case 'datetime':
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case 'egw_time':
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return clone($this);
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case 'array':
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$arr = array(
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'year' => (int)parent::format('Y'),
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'month' => (int)parent::format('m'),
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'day' => (int)parent::format('d'),
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'hour' => (int)parent::format('H'),
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'minute' => (int)parent::format('i'),
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'second' => (int)parent::format('s'),
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'full' => parent::format('Ymd'),
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);
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$arr['raw'] = mktime($arr['hour'],$arr['minute'],$arr['second'],$arr['month'],$arr['day'],$arr['year']);
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return $arr;
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case 'date_array': // array with short keys used by date: Y, m, d, H, i, s (used in eTemplate)
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return array(
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'Y' => (int)parent::format('Y'),
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'm' => (int)parent::format('m'),
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'd' => (int)parent::format('d'),
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'H' => (int)parent::format('H'),
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'i' => (int)parent::format('i'),
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's' => (int)parent::format('s'),
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);
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}
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// default $type contains string with format
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return parent::format($type);
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}
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/**
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* Cast object to a string
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*
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* @return string
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*/
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public function __toString()
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{
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return $this->format(self::DATABASE);
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}
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/**
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* Convert a server time into a user time
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*
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* @param int|string|array|DateTime $time
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* @param string $type=null type or return-value, default (null) same as $time
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* @return int|string|array|datetime null if time could not be parsed
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*/
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public static function server2user($time,$type=null)
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{
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if (!is_a($time,$typeof='egw_time'))
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{
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try
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{
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$time = new egw_time($time,self::$server_timezone,$typeof);
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}
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catch(Exception $e)
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{
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return null; // time could not be parsed
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}
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}
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$time->setUser();
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if (is_null($type)) $type = $typeof;
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//echo "<p>".__METHOD__."($time,$type) = ".print_r($format->format($type),true)."</p>\n";
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return $time->format($type);
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}
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/**
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* Convert a user time into a server time
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*
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* @param int|string|array|datetime $time
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* @param string $type=null type or return-value, default (null) same as $time
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* @return int|string|array|datetime null if time could not be parsed
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*/
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public static function user2server($time,$type=null)
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{
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if (!is_a($time,$typeof='egw_time'))
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{
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try
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{
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$time = new egw_time($time,self::$user_timezone,$typeof);
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}
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catch(Exception $e)
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{
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return null; // time could not be parsed
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}
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}
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$time->setServer();
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if (is_null($type)) $type = $typeof;
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//echo "<p>".__METHOD__."($time,$type) = ".print_r($format->format($type),true)."</p>\n";
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return $time->format($type);
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}
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/**
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* Convert time to a specific format or string, static version of egw_time::format()
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*
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* @param int|string|array|DateTime $time='now' see constructor
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* @param string $type='' 'integer'|'ts'=timestamp, 'server'=timestamp in servertime, 'string'='Y-m-d H:i:s', 'object'=DateTime,
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* 'array'=array with values for keys ('year','month','day','hour','minute','second','full','raw') or string with format
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* true = date only, false = time only as in user prefs, '' = date+time as in user prefs
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* @return int|string|array|datetime see $type, null if time could not be parsed
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*/
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public static function to($time='now',$type='')
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{
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if (!is_a($time,'egw_time'))
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{
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try
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{
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$time = new egw_time($time);
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}
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catch(Exception $e)
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{
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return null; // time could not be parsed
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}
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}
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return $time->format($type);
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}
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/**
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* Setter for user timezone, should be called after reading user preferences
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*
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* @param string $tz timezone, eg. 'Europe/Berlin' or 'UTC'
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* @param string $dateformat='' eg. 'Y-m-d' or 'd.m.Y'
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* @param string|int $timeformat='' integer 12, 24, or format string eg. 'H:i'
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* @throws egw_exception_wrong_userinput if invalid $tz parameter
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* @return DateTimeZone
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*/
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public static function setUserPrefs($tz,$dateformat='',$timeformat='')
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{
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//echo "<p>".__METHOD__."('$tz','$dateformat','$timeformat') ".function_backtrace()."</p>\n";
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if (!empty($dateformat)) self::$user_dateformat = $dateformat;
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switch($timeformat)
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{
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case '':
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break;
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case '24':
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self::$user_timeformat = 'H:i';
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break;
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case '12':
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self::$user_timeformat = 'h:i a';
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break;
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default:
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self::$user_timeformat = $timeformat;
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break;
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}
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try {
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self::$user_timezone = new DateTimeZone($tz);
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}
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catch(Exception $e)
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{
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throw new egw_exception_wrong_userinput(lang('You need to %1set your timezone preference%2.','<a href="'.egw::link('/index.php',array(
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'menuaction' => 'preferences.uisettings.index',
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'appname' => 'preferences')).'">','</a>'));
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}
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return self::$user_timezone;
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}
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/**
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* Get offset in seconds between user and server time at given time $time
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*
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* Compatibility method for old code. It is only valid for the given time, because of possible daylight saving changes!
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*
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* @param int|string|DateTime $time='now'
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* @return int difference in seconds between user and server time (for the given time!)
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*/
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public static function tz_offset_s($time='now')
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{
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if (!is_a($time,'DateTime')) $time = new egw_time($time);
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return egw_time::$user_timezone->getOffset($time) - egw_time::$server_timezone->getOffset($time);
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}
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/**
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* Init static variables, reading user prefs
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*/
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public static function init()
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{
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self::$server_timezone = new DateTimeZone(date_default_timezone_get());
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if (isset($GLOBALS['egw_info']['user']['preferences']['common']['tz']))
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{
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self::setUserPrefs($GLOBALS['egw_info']['user']['preferences']['common']['tz'],
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$GLOBALS['egw_info']['user']['preferences']['common']['dateformat'],
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$GLOBALS['egw_info']['user']['preferences']['common']['timeformat']);
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}
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else
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{
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self::$user_timezone = clone(self::$server_timezone);
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}
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}
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/**
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* Return "beautified" timezone list:
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* - no depricated timezones
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* - return UTC and oceans at the end
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* - if (user lang is a european language), move Europe to top
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*
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* @return array continent|ocean => array(tz-name => tz-label incl. current time)
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*/
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public static function getTimezones()
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{
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// prepare list of timezones from php, ignoring depricated ones and sort as follows
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$tzs = array(
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'Africa' => array(), // Contients
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'America' => array(),
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'Asia' => array(),
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'Australia' => array(),
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'Europe' => array(),
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'Atlantic' => array(), // Oceans
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'Pacific' => array(),
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'Indian' => array(),
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'Antarctica' => array(), // Poles
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'Arctic' => array(),
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'UTC' => array('UTC' => 'UTC'),
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);
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// no VTIMEZONE available in calendar_timezones --> do NOT return them
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static $no_vtimezone = array(
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'Europe/Tiraspol',
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'America/Atka',
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'America/Buenos_Aires',
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'America/Catamarca',
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'America/Coral_Harbour',
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'America/Cordoba',
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'America/Ensenada',
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'America/Fort_Wayne',
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'America/Indianapolis',
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'America/Jujuy',
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'America/Knox_IN',
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'America/Mendoza',
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'America/Porto_Acre',
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'America/Rosario',
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'America/Virgin',
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'Asia/Ashkhabad',
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'Asia/Beijing',
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'Asia/Chungking',
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'Asia/Dacca',
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'Asia/Macao',
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'Asia/Riyadh87',
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'Asia/Riyadh88',
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'Asia/Riyadh89',
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'Asia/Tel_Aviv',
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'Asia/Thimbu',
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'Asia/Ujung_Pandang',
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'Asia/Ulan_Bator',
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'Australia/ACT',
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'Australia/Canberra',
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'Australia/LHI',
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'Australia/North',
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'Australia/NSW',
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'Australia/Queensland',
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'Australia/South',
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'Australia/Tasmania',
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'Australia/Victoria',
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'Australia/West',
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'Australia/Yancowinna',
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'Pacific/Samoa',
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);
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foreach(DateTimeZone::listIdentifiers() as $name)
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{
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if (in_array($name,$no_vtimezone)) continue; // do NOT allow to set in EGroupware, as we have not VTIMEZONE component for it
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list($continent,$rest) = explode('/',$name,2);
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if (!isset($tzs[$continent])) continue; // old depricated timezones
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$datetime = new egw_time('now',new DateTimeZone($name));
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$tzs[$continent][$name] = str_replace(array('_','/'),array(' ',' / '),$name).' '.$datetime->format();
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unset($datetime);
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}
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foreach($tzs as $continent => &$data)
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{
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natcasesort($data); // sort cities
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}
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unset($data);
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// if user lang or installed langs contain a european language --> move Europe to top of tz list
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$langs = translation::get_installed_langs();
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if (array_intersect(array($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 $ts)
|
|
{
|
|
try {
|
|
echo "<p>egw_time::to($ts,'Y-m-d H:i:s')=".egw_time::to($ts,'Y-m-d H:i:s')."</p>\n";
|
|
$et = new egw_time($ts);
|
|
echo "<p>egw_time($ts)->format('Y-m-d H:i:s')=".$et->format('Y-m-d H:i:s')."</p>\n";
|
|
$dt = new DateTime($ts);
|
|
echo "<p>DateTime($ts)->format('Y-m-d H:i:s')=".$dt->format('Y-m-d H:i:s')."</p>\n";
|
|
} catch(Exception $e) {
|
|
echo "<p><b>Exception</b>: ".$e->getMessage()."</p>\n";
|
|
}
|
|
}
|
|
// user time is UTC
|
|
echo "<p>user timezone = ".($GLOBALS['egw_info']['user']['preferences']['common']['tz'] = 'UTC').", server timezone = ".date_default_timezone_get()."</p>\n";
|
|
|
|
$time = time();
|
|
echo "<p>time=$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'))."</p>\n";
|
|
|
|
echo "egw_time::to(array('full' => '20091020', 'hour' => 12, 'minute' => 0))='".egw_time::to(array('full' => '20091020', 'hour' => 12, 'minute' => 0))."'</p>\n";
|
|
|
|
$ts = egw_time::to(array('full' => '20091027', 'hour' => 10, 'minute' => 0),'ts');
|
|
echo "<p>2009-10-27 10h UTC timestamp=$ts --> server time = ".egw_time::user2server($ts,'')." --> user time = ".egw_time::server2user(egw_time::user2server($ts),'')."</p>\n";
|
|
|
|
$ts = egw_time::to(array('full' => '20090627', 'hour' => 10, 'minute' => 0),'ts');
|
|
echo "<p>2009-06-27 10h UTC timestamp=$ts --> server time = ".egw_time::user2server($ts,'')." --> user time = ".egw_time::server2user(egw_time::user2server($ts),'')."</p>\n";
|
|
}
|
|
*/
|