mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-10-06 10:12:46 +02:00
ab9c9d21b6
calendar, plus a first calendar implemenation. This implementation just replaces following calendar_bo methods: - date2ts($date,$user2server=False) - date2array($date,$server2user=False) - date2string($date,$server2user=False,$format='Ymd') - format_date($date,$format='') which static methods from egw_time. If your server is in same timezone as the user, you should experience no difference. As a small test, you can switch to an other timezone (eg. UTC) to recognice on a weekly repeating event (which still repeats on equal server time!) that it moves by one hour when daylight saving changes. This switching to a TZ with different daylight saving rules, was not working before. Happy testing :-)
314 lines
11 KiB
PHP
314 lines
11 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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* @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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* 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()
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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::init()
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*
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* @var string
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*/
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static public $user_time_format = 'H:i';
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/**
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* Date format from user prefs, set by self::init()
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*
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* @var string
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*/
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static public $user_date_format = '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 $time (optional)
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* @return egw_time
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*/
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public function __construct($time='now',DateTimeZone $tz=null,&$type=null)
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{
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if (is_null($tz))
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{
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if (is_null(self::$user_timezone)) self::init();
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$tz = self::$user_timezone;
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}
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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) && $time > 21000000))
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{
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if (is_numeric($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 (!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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if (is_null(self::$user_timezone)) self::init();
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$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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if (is_null(self::$server_timezone)) self::init();
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$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_date_format : self::$user_time_format;
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}
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else
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{
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$type = self::$user_date_format.', '.self::$user_time_format;
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}
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// fall through
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case 'string':
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return parent::format('Y-m-d H:i:s');
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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 $this;
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case 'array':
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$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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}
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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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* 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 $time
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* @return int|string|array|datetime
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*/
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public static function server2user($time,$type=null)
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{
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if (is_null(self::$user_timezone)) self::init();
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if (!is_a($time,$typeof='egw_time')) $time = new egw_time($time,self::$server_timezone,$typeof);
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$time->setUser();
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if (is_null($type)) $type = $typeof;
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//echo "<p>".__METHOD__."($time,$type) = ".print_r($datetime->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 $time
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* @return int|string|array|datetime
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*/
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public static function user2server($time,$type=null)
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{
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if (is_null(self::$user_timezone)) self::init();
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if (!is_a($time,$typeof='egw_time')) $time = new egw_time($time,self::$user_timezone,$typeof);
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$time->setServer();
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if (is_null($type)) $type = $typeof;
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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 $type
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*/
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public static function to($time='now',$type='')
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{
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if (!is_a($time,'egw_time')) $time = new egw_time($time);
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return $time->format($type);
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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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private static function init()
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{
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if (is_null(self::$server_timezone))
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{
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self::$server_timezone = new DateTimeZone(date_default_timezone_get());
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}
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if (is_null(self::$user_timezone) && isset($GLOBALS['egw_info']['user']['preferences']['common']))
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{
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if (empty($GLOBALS['egw_info']['user']['preferences']['common']['tz']))
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{
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throw new egw_exception_wrong_userinput(lang('You need to %1set your timezone preference%2.','<a href="'.egw::link('/index.php',array(
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'menuaction' => 'preferences.uisettings.index',
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'appname' => 'preferences')).'">','</a>'));
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}
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self::$user_timezone = new DateTimeZone($GLOBALS['egw_info']['user']['preferences']['common']['tz']);
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}
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}
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}
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/*
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if (isset($_SERVER['SCRIPT_FILENAME']) && $_SERVER['SCRIPT_FILENAME'] == __FILE__) // some tests
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{
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// user time is UTC
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echo "<p>user timezone = ".($GLOBALS['egw_info']['user']['preferences']['common']['tz'] = 'UTC').", server timezone = ".date_default_timezone_get()."</p>\n";
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$time = time();
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echo "<p>time=$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";
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echo "egw_time::to(array('full' => '20091020', 'hour' => 12, 'minute' => 0))='".egw_time::to(array('full' => '20091020', 'hour' => 12, 'minute' => 0))."'</p>\n";
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$ts = egw_time::to(array('full' => '20091027', 'hour' => 10, 'minute' => 0),'ts');
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echo "<p>2009-10-27 10h UTC timestamp=$ts --> server time = ".egw_time::user2server($ts,'')." --> user time = ".egw_time::server2user(egw_time::user2server($ts),'')."</p>\n";
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$ts = egw_time::to(array('full' => '20090627', 'hour' => 10, 'minute' => 0),'ts');
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echo "<p>2009-06-27 10h UTC timestamp=$ts --> server time = ".egw_time::user2server($ts,'')." --> user time = ".egw_time::server2user(egw_time::user2server($ts),'')."</p>\n";
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}
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*/ |