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<?php
namespace Sabre\VObject;
use DateTimeZone;
use InvalidArgumentException;
use Sabre\VObject\TimezoneGuesser\FindFromOffset;
use Sabre\VObject\TimezoneGuesser\FindFromTimezoneIdentifier;
use Sabre\VObject\TimezoneGuesser\FindFromTimezoneMap;
use Sabre\VObject\TimezoneGuesser\GuessFromLicEntry;
use Sabre\VObject\TimezoneGuesser\GuessFromMsTzId;
use Sabre\VObject\TimezoneGuesser\TimezoneFinder;
use Sabre\VObject\TimezoneGuesser\TimezoneGuesser;
/**
* Time zone name translation.
*
* This file translates well-known time zone names into "Olson database" time zone names.
*
* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
* @author Frank Edelhaeuser (fedel@users.sourceforge.net)
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class TimeZoneUtil
{
/** @var self */
private static $instance = null;
/** @var TimezoneGuesser[] */
private $timezoneGuessers = [];
/** @var TimezoneFinder[] */
private $timezoneFinders = [];
private function __construct()
{
$this->addGuesser('lic', new GuessFromLicEntry());
$this->addGuesser('msTzId', new GuessFromMsTzId());
$this->addFinder('tzid', new FindFromTimezoneIdentifier());
$this->addFinder('tzmap', new FindFromTimezoneMap());
$this->addFinder('offset', new FindFromOffset());
}
private static function getInstance(): self
{
if (null === self::$instance) {
self::$instance = new self();
}
return self::$instance;
}
private function addGuesser(string $key, TimezoneGuesser $guesser): void
{
$this->timezoneGuessers[$key] = $guesser;
}
private function addFinder(string $key, TimezoneFinder $finder): void
{
$this->timezoneFinders[$key] = $finder;
}
/**
* This method will try to find out the correct timezone for an iCalendar
* date-time value.
*
* You must pass the contents of the TZID parameter, as well as the full
* calendar.
*
* If the lookup fails, this method will return the default PHP timezone
* (as configured using date_default_timezone_set, or the date.timezone ini
* setting).
*
* Alternatively, if $failIfUncertain is set to true, it will throw an
* exception if we cannot accurately determine the timezone.
*/
private function findTimeZone(string $tzid, Component $vcalendar = null, bool $failIfUncertain = false): DateTimeZone
{
foreach ($this->timezoneFinders as $timezoneFinder) {
$timezone = $timezoneFinder->find($tzid, $failIfUncertain);
if (!$timezone instanceof DateTimeZone) {
continue;
}
return $timezone;
}
if ($vcalendar) {
// If that didn't work, we will scan VTIMEZONE objects
foreach ($vcalendar->select('VTIMEZONE') as $vtimezone) {
if ((string) $vtimezone->TZID === $tzid) {
foreach ($this->timezoneGuessers as $timezoneGuesser) {
$timezone = $timezoneGuesser->guess($vtimezone, $failIfUncertain);
if (!$timezone instanceof DateTimeZone) {
continue;
}
return $timezone;
}
}
}
}
if ($failIfUncertain) {
throw new InvalidArgumentException('We were unable to determine the correct PHP timezone for tzid: '.$tzid);
}
// If we got all the way here, we default to whatever has been set as the PHP default timezone.
return new DateTimeZone(date_default_timezone_get());
}
public static function addTimezoneGuesser(string $key, TimezoneGuesser $guesser): void
{
self::getInstance()->addGuesser($key, $guesser);
}
public static function addTimezoneFinder(string $key, TimezoneFinder $finder): void
{
self::getInstance()->addFinder($key, $finder);
}
/**
* @param string $tzid
* @param false $failIfUncertain
*
* @return DateTimeZone
*/
public static function getTimeZone($tzid, Component $vcalendar = null, $failIfUncertain = false)
{
return self::getInstance()->findTimeZone($tzid, $vcalendar, $failIfUncertain);
}
public static function clean(): void
{
self::$instance = null;
}
// Keeping things for backwards compatibility
/**
* @var array|null
*
* @deprecated
*/
public static $map = null;
/**
* List of microsoft exchange timezone ids.
*
* Source: http://msdn.microsoft.com/en-us/library/aa563018(loband).aspx
*
* @deprecated
*/
public static $microsoftExchangeMap = [
0 => 'UTC',
31 => 'Africa/Casablanca',
// Insanely, id #2 is used for both Europe/Lisbon, and Europe/Sarajevo.
// I'm not even kidding.. We handle this special case in the
// getTimeZone method.
2 => 'Europe/Lisbon',
1 => 'Europe/London',
4 => 'Europe/Berlin',
6 => 'Europe/Prague',
3 => 'Europe/Paris',
69 => 'Africa/Luanda', // This was a best guess
7 => 'Europe/Athens',
5 => 'Europe/Bucharest',
49 => 'Africa/Cairo',
50 => 'Africa/Harare',
59 => 'Europe/Helsinki',
27 => 'Asia/Jerusalem',
26 => 'Asia/Baghdad',
74 => 'Asia/Kuwait',
51 => 'Europe/Moscow',
56 => 'Africa/Nairobi',
25 => 'Asia/Tehran',
24 => 'Asia/Muscat', // Best guess
54 => 'Asia/Baku',
48 => 'Asia/Kabul',
58 => 'Asia/Yekaterinburg',
47 => 'Asia/Karachi',
23 => 'Asia/Calcutta',
62 => 'Asia/Kathmandu',
46 => 'Asia/Almaty',
71 => 'Asia/Dhaka',
66 => 'Asia/Colombo',
61 => 'Asia/Rangoon',
22 => 'Asia/Bangkok',
64 => 'Asia/Krasnoyarsk',
45 => 'Asia/Shanghai',
63 => 'Asia/Irkutsk',
21 => 'Asia/Singapore',
73 => 'Australia/Perth',
75 => 'Asia/Taipei',
20 => 'Asia/Tokyo',
72 => 'Asia/Seoul',
70 => 'Asia/Yakutsk',
19 => 'Australia/Adelaide',
44 => 'Australia/Darwin',
18 => 'Australia/Brisbane',
76 => 'Australia/Sydney',
43 => 'Pacific/Guam',
42 => 'Australia/Hobart',
68 => 'Asia/Vladivostok',
41 => 'Asia/Magadan',
17 => 'Pacific/Auckland',
40 => 'Pacific/Fiji',
67 => 'Pacific/Tongatapu',
29 => 'Atlantic/Azores',
53 => 'Atlantic/Cape_Verde',
30 => 'America/Noronha',
8 => 'America/Sao_Paulo', // Best guess
32 => 'America/Argentina/Buenos_Aires',
60 => 'America/Godthab',
28 => 'America/St_Johns',
9 => 'America/Halifax',
33 => 'America/Caracas',
65 => 'America/Santiago',
35 => 'America/Bogota',
10 => 'America/New_York',
34 => 'America/Indiana/Indianapolis',
55 => 'America/Guatemala',
11 => 'America/Chicago',
37 => 'America/Mexico_City',
36 => 'America/Edmonton',
38 => 'America/Phoenix',
12 => 'America/Denver', // Best guess
13 => 'America/Los_Angeles', // Best guess
14 => 'America/Anchorage',
15 => 'Pacific/Honolulu',
16 => 'Pacific/Midway',
39 => 'Pacific/Kwajalein',
];
/**
* This method will load in all the tz mapping information, if it's not yet
* done.
*
* @deprecated
*/
public static function loadTzMaps()
{
if (!is_null(self::$map)) {
return;
}
self::$map = array_merge(
include __DIR__.'/timezonedata/windowszones.php',
include __DIR__.'/timezonedata/lotuszones.php',
include __DIR__.'/timezonedata/exchangezones.php',
include __DIR__.'/timezonedata/php-workaround.php'
);
}
/**
* This method returns an array of timezone identifiers, that are supported
* by DateTimeZone(), but not returned by DateTimeZone::listIdentifiers().
*
* We're not using DateTimeZone::listIdentifiers(DateTimeZone::ALL_WITH_BC) because:
* - It's not supported by some PHP versions as well as HHVM.
* - It also returns identifiers, that are invalid values for new DateTimeZone() on some PHP versions.
* (See timezonedata/php-bc.php and timezonedata php-workaround.php)
*
* @return array
*
* @deprecated
*/
public static function getIdentifiersBC()
{
return include __DIR__.'/timezonedata/php-bc.php';
}
}
|
