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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\DAV\CalDAV;
use DateTimeZone;
/**
* Class to generate DateTimeZone object with automated Microsoft and IANA handling
*
* @since 31.0.0
*/
class TimeZoneFactory {
/**
* conversion table of Microsoft time zones to IANA time zones
*
* @var array<string,string> MS2IANA
*/
private const MS2IANA = [
'AUS Central Standard Time' => 'Australia/Darwin',
'Aus Central W. Standard Time' => 'Australia/Eucla',
'AUS Eastern Standard Time' => 'Australia/Sydney',
'Afghanistan Standard Time' => 'Asia/Kabul',
'Alaskan Standard Time' => 'America/Anchorage',
'Aleutian Standard Time' => 'America/Adak',
'Altai Standard Time' => 'Asia/Barnaul',
'Arab Standard Time' => 'Asia/Riyadh',
'Arabian Standard Time' => 'Asia/Dubai',
'Arabic Standard Time' => 'Asia/Baghdad',
'Argentina Standard Time' => 'America/Buenos_Aires',
'Astrakhan Standard Time' => 'Europe/Astrakhan',
'Atlantic Standard Time' => 'America/Halifax',
'Azerbaijan Standard Time' => 'Asia/Baku',
'Azores Standard Time' => 'Atlantic/Azores',
'Bahia Standard Time' => 'America/Bahia',
'Bangladesh Standard Time' => 'Asia/Dhaka',
'Belarus Standard Time' => 'Europe/Minsk',
'Bougainville Standard Time' => 'Pacific/Bougainville',
'Cape Verde Standard Time' => 'Atlantic/Cape_Verde',
'Canada Central Standard Time' => 'America/Regina',
'Caucasus Standard Time' => 'Asia/Yerevan',
'Cen. Australia Standard Time' => 'Australia/Adelaide',
'Central America Standard Time' => 'America/Guatemala',
'Central Asia Standard Time' => 'Asia/Almaty',
'Central Brazilian Standard Time' => 'America/Cuiaba',
'Central Europe Standard Time' => 'Europe/Budapest',
'Central European Standard Time' => 'Europe/Warsaw',
'Central Pacific Standard Time' => 'Pacific/Guadalcanal',
'Central Standard Time' => 'America/Chicago',
'Central Standard Time (Mexico)' => 'America/Mexico_City',
'Chatham Islands Standard Time' => 'Pacific/Chatham',
'China Standard Time' => 'Asia/Shanghai',
'Coordinated Universal Time' => 'UTC',
'Cuba Standard Time' => 'America/Havana',
'Dateline Standard Time' => 'Etc/GMT+12',
'E. Africa Standard Time' => 'Africa/Nairobi',
'E. Australia Standard Time' => 'Australia/Brisbane',
'E. Europe Standard Time' => 'Europe/Chisinau',
'E. South America Standard Time' => 'America/Sao_Paulo',
'Easter Island Standard Time' => 'Pacific/Easter',
'Eastern Standard Time' => 'America/Toronto',
'Eastern Standard Time (Mexico)' => 'America/Cancun',
'Egypt Standard Time' => 'Africa/Cairo',
'Ekaterinburg Standard Time' => 'Asia/Yekaterinburg',
'FLE Standard Time' => 'Europe/Kiev',
'Fiji Standard Time' => 'Pacific/Fiji',
'GMT Standard Time' => 'Europe/London',
'GTB Standard Time' => 'Europe/Bucharest',
'Georgian Standard Time' => 'Asia/Tbilisi',
'Greenland Standard Time' => 'America/Godthab',
'Greenland (Danmarkshavn)' => 'America/Godthab',
'Greenwich Standard Time' => 'Atlantic/Reykjavik',
'Haiti Standard Time' => 'America/Port-au-Prince',
'Hawaiian Standard Time' => 'Pacific/Honolulu',
'India Standard Time' => 'Asia/Kolkata',
'Iran Standard Time' => 'Asia/Tehran',
'Israel Standard Time' => 'Asia/Jerusalem',
'Jordan Standard Time' => 'Asia/Amman',
'Kaliningrad Standard Time' => 'Europe/Kaliningrad',
'Kamchatka Standard Time' => 'Asia/Kamchatka',
'Korea Standard Time' => 'Asia/Seoul',
'Libya Standard Time' => 'Africa/Tripoli',
'Line Islands Standard Time' => 'Pacific/Kiritimati',
'Lord Howe Standard Time' => 'Australia/Lord_Howe',
'Magadan Standard Time' => 'Asia/Magadan',
'Magallanes Standard Time' => 'America/Punta_Arenas',
'Malaysia Standard Time' => 'Asia/Kuala_Lumpur',
'Marquesas Standard Time' => 'Pacific/Marquesas',
'Mauritius Standard Time' => 'Indian/Mauritius',
'Mid-Atlantic Standard Time' => 'Atlantic/South_Georgia',
'Middle East Standard Time' => 'Asia/Beirut',
'Montevideo Standard Time' => 'America/Montevideo',
'Morocco Standard Time' => 'Africa/Casablanca',
'Mountain Standard Time' => 'America/Denver',
'Mountain Standard Time (Mexico)' => 'America/Chihuahua',
'Myanmar Standard Time' => 'Asia/Rangoon',
'N. Central Asia Standard Time' => 'Asia/Novosibirsk',
'Namibia Standard Time' => 'Africa/Windhoek',
'Nepal Standard Time' => 'Asia/Kathmandu',
'New Zealand Standard Time' => 'Pacific/Auckland',
'Newfoundland Standard Time' => 'America/St_Johns',
'Norfolk Standard Time' => 'Pacific/Norfolk',
'North Asia East Standard Time' => 'Asia/Irkutsk',
'North Asia Standard Time' => 'Asia/Krasnoyarsk',
'North Korea Standard Time' => 'Asia/Pyongyang',
'Omsk Standard Time' => 'Asia/Omsk',
'Pacific SA Standard Time' => 'America/Santiago',
'Pacific Standard Time' => 'America/Los_Angeles',
'Pacific Standard Time (Mexico)' => 'America/Tijuana',
'Pakistan Standard Time' => 'Asia/Karachi',
'Paraguay Standard Time' => 'America/Asuncion',
'Qyzylorda Standard Time' => 'Asia/Qyzylorda',
'Romance Standard Time' => 'Europe/Paris',
'Russian Standard Time' => 'Europe/Moscow',
'Russia Time Zone 10' => 'Asia/Srednekolymsk',
'Russia Time Zone 3' => 'Europe/Samara',
'SA Eastern Standard Time' => 'America/Cayenne',
'SA Pacific Standard Time' => 'America/Bogota',
'SA Western Standard Time' => 'America/La_Paz',
'SE Asia Standard Time' => 'Asia/Bangkok',
'Saint Pierre Standard Time' => 'America/Miquelon',
'Sakhalin Standard Time' => 'Asia/Sakhalin',
'Samoa Standard Time' => 'Pacific/Apia',
'Sao Tome Standard Time' => 'Africa/Sao_Tome',
'Saratov Standard Time' => 'Europe/Saratov',
'Singapore Standard Time' => 'Asia/Singapore',
'South Africa Standard Time' => 'Africa/Johannesburg',
'South Sudan Standard Time' => 'Africa/Juba',
'Sri Lanka Standard Time' => 'Asia/Colombo',
'Sudan Standard Time' => 'Africa/Khartoum',
'Syria Standard Time' => 'Asia/Damascus',
'Taipei Standard Time' => 'Asia/Taipei',
'Tasmania Standard Time' => 'Australia/Hobart',
'Tocantins Standard Time' => 'America/Araguaina',
'Tokyo Standard Time' => 'Asia/Tokyo',
'Tomsk Standard Time' => 'Asia/Tomsk',
'Tonga Standard Time' => 'Pacific/Tongatapu',
'Transbaikal Standard Time' => 'Asia/Chita',
'Turkey Standard Time' => 'Europe/Istanbul',
'Turks And Caicos Standard Time' => 'America/Grand_Turk',
'US Eastern Standard Time' => 'America/Indianapolis',
'US Mountain Standard Time' => 'America/Phoenix',
'UTC' => 'Etc/GMT',
'UTC+13' => 'Etc/GMT-13',
'UTC+12' => 'Etc/GMT-12',
'UTC-02' => 'Etc/GMT+2',
'UTC-09' => 'Etc/GMT+9',
'UTC-11' => 'Etc/GMT+11',
'Ulaanbaatar Standard Time' => 'Asia/Ulaanbaatar',
'Venezuela Standard Time' => 'America/Caracas',
'Vladivostok Standard Time' => 'Asia/Vladivostok',
'Volgograd Standard Time' => 'Europe/Volgograd',
'W. Australia Standard Time' => 'Australia/Perth',
'W. Central Africa Standard Time' => 'Africa/Lagos',
'W. Europe Standard Time' => 'Europe/Berlin',
'W. Mongolia Standard Time' => 'Asia/Hovd',
'West Asia Standard Time' => 'Asia/Tashkent',
'West Bank Standard Time' => 'Asia/Hebron',
'West Pacific Standard Time' => 'Pacific/Port_Moresby',
'West Samoa Standard Time' => 'Pacific/Apia',
'Yakutsk Standard Time' => 'Asia/Yakutsk',
'Yukon Standard Time' => 'America/Whitehorse',
'Yekaterinburg Standard Time' => 'Asia/Yekaterinburg',
];
/**
* Determines if given time zone name is a Microsoft time zone
*
* @since 31.0.0
*
* @param string $name time zone name
*
* @return bool
*/
public static function isMS(string $name): bool {
return isset(self::MS2IANA[$name]);
}
/**
* Converts Microsoft time zone name to IANA time zone name
*
* @since 31.0.0
*
* @param string $name microsoft time zone
*
* @return string|null valid IANA time zone name on success, or null on failure
*/
public static function toIANA(string $name): ?string {
return isset(self::MS2IANA[$name]) ? self::MS2IANA[$name] : null;
}
/**
* Generates DateTimeZone object for given time zone name
*
* @since 31.0.0
*
* @param string $name time zone name
*
* @return DateTimeZone|null
*/
public function fromName(string $name): ?DateTimeZone {
// if zone name is MS convert to IANA, otherwise just assume the zone is IANA
$zone = @timezone_open(self::toIANA($name) ?? $name);
return ($zone instanceof DateTimeZone) ? $zone : null;
}
}
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