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/*
* SPDX-FileCopyrightText: 2012 Christian Mollekopf <mollekopf@kolabsys.com>
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#include "timezoneconverter.h"
#include <QRegularExpression>
#include "pimkolab_debug.h"
#include <QTimeZone>
QString TimezoneConverter::normalizeTimezone(const QString &tz)
{
if (QTimeZone::isTimeZoneIdAvailable(tz.toLatin1())) {
return tz;
}
auto normalizedId = QTimeZone::windowsIdToDefaultIanaId(tz.toLatin1());
if (!normalizedId.isEmpty()) {
return QString::fromUtf8(normalizedId);
}
// We're dealing with an invalid or unknown timezone, try to parse it
QString guessedTimezone = fromCityName(tz);
if (guessedTimezone.isEmpty()) {
guessedTimezone = fromHardcodedList(tz);
}
if (guessedTimezone.isEmpty()) {
guessedTimezone = fromGMTOffsetTimezone(tz);
}
qCDebug(PIMKOLAB_LOG) << "Guessed timezone and found: " << guessedTimezone;
return guessedTimezone;
}
QString TimezoneConverter::fromGMTOffsetTimezone(const QString &tz)
{
Q_UNUSED(tz)
return {};
}
QString TimezoneConverter::fromCityName(const QString &tz)
{
const auto zones = QTimeZone::availableTimeZoneIds();
QHash<QString, QString> countryMap;
for (const auto &zone : zones) {
const QString cityName = QString::fromUtf8(zone.split('/').last());
// qDebug() << " zone : " << zone;
// qDebug() << " cityName : " << cityName;
// qDebug() << " countryMap : " << countryMap;
// Q_ASSERT(!countryMap.contains(cityName));
countryMap.insert(cityName, QString::fromUtf8(zone));
}
static const QRegularExpression locationFinder(QStringLiteral("\\b([a-zA-Z])+\\b"));
QRegularExpressionMatchIterator iter = locationFinder.globalMatchView(tz);
while (iter.hasNext()) {
QRegularExpressionMatch match = iter.next();
const QString location = match.captured(0);
qCDebug(PIMKOLAB_LOG) << "location " << location;
if (countryMap.contains(location)) {
qCDebug(PIMKOLAB_LOG) << "found match " << countryMap.value(location);
return countryMap.value(location);
}
}
return {};
}
// Based on
// * http://msdn.microsoft.com/en-us/library/ms912391(v=winembedded.11).aspx
// * http://technet.microsoft.com/en-us/library/cc749073(v=ws.10).aspx
// * http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
// * http://stackoverflow.com/questions/4967903/linux-windows-timezone-mapping
static const struct WindowsTimezone {
// const int gmtOffset;
const char *timezoneSpecifier; // This one should be stable and always in english
const char *name; // The display name (which is in some cases still useful to try guessing)
const char *olson[28]; // Corresponding olson timezones we can map to
} windowsTimezones[] = {
{"Afghanistan Standard Time", "Kabul", {"Asia/Kabul", "Asia/Kabul"}},
{"Alaskan Standard Time", "Alaska", {"America/Anchorage", "America/Anchorage America/Juneau America/Nome America/Sitka America/Yakutat"}},
{"Arab Standard Time", "Kuwait, Riyadh", {"Asia/Riyadh", "Asia/Bahrain", "Asia/Kuwait", "Asia/Qatar", "Asia/Riyadh", "Asia/Aden"}},
{"Arabian Standard Time", "Abu Dhabi, Muscat", {"Asia/Dubai", "Asia/Dubai", "Asia/Muscat", "Etc/GMT-4"}},
{"Arabic Standard Time", "Baghdad", {"Asia/Baghdad", "Asia/Baghdad"}},
{"Atlantic Standard Time",
"Atlantic Time (Canada)",
{"America/Halifax", "Atlantic/Bermuda", "America/Halifax America/Glace_Bay America/Goose_Bay America/Moncton", "America/Thule"}},
{"AUS Central Standard Time", "Darwin", {"Australia/Darwin", "Australia/Darwin"}},
{"AUS Eastern Standard Time", "Canberra, Melbourne, Sydney", {"Australia/Sydney", "Australia/Sydney Australia/Melbourne"}},
{"Azerbaijan Standard Time", "Baku", {"Asia/Baku", "Asia/Baku"}},
{"Azores Standard Time", "Azores", {"Atlantic/Azores", "America/Scoresbysund", "Atlantic/Azores"}},
{"Canada Central Standard Time", "Saskatchewan", {"America/Regina", "America/Regina America/Swift_Current"}},
{"Cape Verde Standard Time", "Cape Verde Islands", {"Atlantic/Cape_Verde", "Atlantic/Cape_Verde", "Etc/GMT+1"}},
{"Caucasus Standard Time", "Yerevan", {"Asia/Yerevan", "Asia/Yerevan"}},
{"Cen. Australia Standard Time", "Adelaide", {"Australia/Adelaide", "Australia/Adelaide Australia/Broken_Hill"}},
{"Central America Standard Time",
"Central America",
{"America/Guatemala",
"America/Belize",
"America/Costa_Rica",
"Pacific/Galapagos",
"America/Guatemala",
"America/Tegucigalpa",
"America/Managua",
"America/El_Salvador",
"Etc/GMT+6"}},
{"Central Asia Standard Time",
"Astana, Dhaka",
{"Asia/Almaty", "Antarctica/Vostok", "Indian/Chagos", "Asia/Bishkek", "Asia/Almaty Asia/Qyzylorda", "Etc/GMT-6"}},
{"Central Brazilian Standard Time", "Manaus", {"America/Cuiaba", "America/Cuiaba America/Campo_Grande"}},
{"Central Europe Standard Time",
"Belgrade, Bratislava, Budapest, Ljubljana, Prague",
{"Europe/Budapest", "Europe/Tirane", "Europe/Prague", "Europe/Budapest", "Europe/Podgorica", "Europe/Belgrade", "Europe/Ljubljana", "Europe/Bratislava"}},
{"Central European Standard Time",
"Sarajevo, Skopje, Warsaw, Zagreb",
{"Europe/Warsaw", "Europe/Sarajevo", "Europe/Zagreb", "Europe/Skopje", "Europe/Warsaw"}},
{"Central Pacific Standard Time",
"Magadan, Solomon Islands, New Caledonia",
{"Pacific/Guadalcanal", "Antarctica/Macquarie", "Pacific/Ponape Pacific/Kosrae", "Pacific/Noumea", "Pacific/Guadalcanal", "Pacific/Efate", "Etc/GMT-11"}},
{"Central Standard Time",
"Central Time (US and Canada)",
{"America/Chicago",
"America/Winnipeg America/Rainy_River America/Rankin_Inlet America/Resolute",
"America/Matamoros",
"America/Chicago America/Indiana/Knox America/Indiana/Tell_City America/Menominee America/North_Dakota/Beulah America/North_Dakota/Center "
"America/North_Dakota/New_Salem",
"CST6CDT"}},
{"Central Standard Time (Mexico)",
"Guadalajara, Mexico City, Monterrey",
{"America/Mexico_City", "America/Mexico_City America/Bahia_Banderas America/Cancun America/Merida America/Monterrey"}},
{"China Standard Time",
"Beijing, Chongqing, Hong Kong SAR, Urumqi",
{"Asia/Shanghai", "Asia/Shanghai Asia/Chongqing Asia/Harbin Asia/Kashgar Asia/Urumqi", "Asia/Hong_Kong", "Asia/Macau"}},
{"Dateline Standard Time", "International Date Line West", {"Etc/GMT+12", "Etc/GMT+12"}},
{"E. Africa Standard Time",
"Nairobi",
{"Africa/Nairobi",
"Antarctica/Syowa",
"Africa/Djibouti",
"Africa/Asmera",
"Africa/Addis_Ababa",
"Africa/Nairobi",
"Indian/Comoro",
"Indian/Antananarivo",
"Africa/Khartoum",
"Africa/Mogadishu",
"Africa/Juba",
"Africa/Dar_es_Salaam",
"Africa/Kampala",
"Indian/Mayotte",
"Etc/GMT-3"}},
{"E. Australia Standard Time", "Brisbane", {"Australia/Brisbane", "Australia/Brisbane Australia/Lindeman"}},
{"E. Europe Standard Time", "Minsk", {"Asia/Nicosia", "Asia/Nicosia"}},
{"E. South America Standard Time", "Brasilia", {"America/Sao_Paulo", "America/Sao_Paulo"}},
{"Eastern Standard Time",
"Eastern Time (US and Canada)",
{"America/New_York",
"America/Nassau",
"America/Toronto America/Iqaluit America/Montreal America/Nipigon America/Pangnirtung America/Thunder_Bay",
"America/Grand_Turk",
"America/New_York America/Detroit America/Indiana/Petersburg America/Indiana/Vincennes America/Indiana/Winamac America/Kentucky/Monticello "
"America/Louisville",
"EST5EDT"}},
{"Egypt Standard Time", "Cairo", {"Africa/Cairo", "Africa/Cairo", "Asia/Gaza Asia/Hebron"}},
{"Ekaterinburg Standard Time", "Ekaterinburg", {"Asia/Yekaterinburg", "Asia/Yekaterinburg"}},
{"Fiji Standard Time", "Fiji Islands, Kamchatka, Marshall Islands", {"Pacific/Fiji", "Pacific/Fiji"}},
{"FLE Standard Time",
"Helsinki, Kiev, Riga, Sofia, Tallinn, Vilnius",
{"Europe/Kiev",
"Europe/Mariehamn",
"Europe/Sofia",
"Europe/Tallinn",
"Europe/Helsinki",
"Europe/Vilnius",
"Europe/Riga",
"Europe/Kiev Europe/Simferopol Europe/Uzhgorod Europe/Zaporozhye"}},
{"Georgian Standard Time", "Tblisi", {"Asia/Tbilisi", "Asia/Tbilisi"}},
{"GMT Standard Time",
"Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London",
{"Europe/London",
"Atlantic/Canary",
"Atlantic/Faeroe",
"Europe/London",
"Europe/Guernsey",
"Europe/Dublin",
"Europe/Isle_of_Man",
"Europe/Jersey",
"Europe/Lisbon Atlantic/Madeira"}},
{"Greenland Standard Time", "Greenland", {"America/Godthab", "America/Godthab"}},
{"Greenwich Standard Time",
"Casablanca, Monrovia",
{"Atlantic/Reykjavik",
"Africa/Ouagadougou",
"Africa/Abidjan",
"Africa/El_Aaiun",
"Africa/Accra",
"Africa/Banjul",
"Africa/Conakry",
"Africa/Bissau",
"Atlantic/Reykjavik",
"Africa/Monrovia",
"Africa/Bamako",
"Africa/Nouakchott",
"Atlantic/St_Helena",
"Africa/Freetown",
"Africa/Dakar",
"Africa/Sao_Tome",
"Africa/Lome"}},
{"GTB Standard Time", "Athens, Bucharest, Istanbul", {"Europe/Bucharest", "Europe/Athens", "Europe/Chisinau", "Europe/Bucharest"}},
{"Hawaiian Standard Time", "Hawaii", {"Pacific/Honolulu", "Pacific/Rarotonga", "Pacific/Tahiti", "Pacific/Johnston", "Pacific/Honolulu", "Etc/GMT+10"}},
{"India Standard Time", "Chennai, Kolkata, Mumbai, New Delhi", {"Asia/Calcutta", "Asia/Calcutta"}},
{"Iran Standard Time", "Tehran", {"Asia/Tehran", "Asia/Tehran"}},
{"Israel Standard Time", "Jerusalem", {"Asia/Jerusalem", "Asia/Jerusalem"}},
{"Korea Standard Time", "Seoul", {"Asia/Seoul", "Asia/Pyongyang", "Asia/Seoul"}},
// {"Mid-Atlantic Standard Time", "Mid-Atlantic", {"}},
{"Mountain Standard Time",
"Mountain Time (US and Canada)",
{"America/Denver",
"America/Edmonton America/Cambridge_Bay America/Inuvik America/Yellowknife",
"America/Ojinaga",
"America/Denver America/Boise America/Shiprock",
"MST7MDT"}},
{"Mountain Standard Time (Mexico)", "Chihuahua, La Paz, Mazatlan", {"America/Chihuahua", "America/Chihuahua America/Mazatlan"}},
{"Myanmar Standard Time", "Yangon (Rangoon)", {"Asia/Rangoon", "Indian/Cocos", "Asia/Rangoon"}},
{"N. Central Asia Standard Time", "Almaty, Novosibirsk", {"Asia/Novosibirsk", "Asia/Novosibirsk Asia/Novokuznetsk Asia/Omsk"}},
{"Namibia Standard Time", "Windhoek", {"Africa/Windhoek", "Africa/Windhoek"}},
{"Nepal Standard Time", "Kathmandu", {"Asia/Katmandu", "Asia/Katmandu"}},
{"New Zealand Standard Time", "Auckland, Wellington", {"Pacific/Auckland", "Antarctica/South_Pole Antarctica/McMurdo", "Pacific/Auckland"}},
{"Newfoundland Standard Time", "Newfoundland and Labrador", {"America/St_Johns", "America/St_Johns"}},
{"North Asia East Standard Time", "Irkutsk, Ulaanbaatar", {"Asia/Irkutsk", "Asia/Irkutsk"}},
{"North Asia Standard Time", "Krasnoyarsk", {"Asia/Krasnoyarsk", "Asia/Krasnoyarsk"}},
{"Pacific SA Standard Time", "Santiago", {"America/Santiago", "Antarctica/Palmer", "America/Santiago"}},
{"Pacific Standard Time",
"Pacific Time (US and Canada); Tijuana",
{"America/Los_Angeles", "America/Vancouver America/Dawson America/Whitehorse", "America/Tijuana", "America/Los_Angeles", "PST8PDT"}},
{"Romance Standard Time",
"Brussels, Copenhagen, Madrid, Paris",
{"Europe/Paris", "Europe/Brussels", "Europe/Copenhagen", "Europe/Madrid Africa/Ceuta", "Europe/Paris"}},
{"Russian Standard Time", "Moscow, St. Petersburg, Volgograd", {"Europe/Moscow", "Europe/Moscow Europe/Samara Europe/Volgograd"}},
{"SA Eastern Standard Time",
"Buenos Aires, Georgetown",
{"America/Cayenne",
"Antarctica/Rothera",
"America/Fortaleza America/Araguaina America/Belem America/Maceio America/Recife America/Santarem",
"Atlantic/Stanley",
"America/Cayenne",
"America/Paramaribo",
"Etc/GMT+3"}},
{"SA Pacific Standard Time",
"Bogota, Lima, Quito",
{"America/Bogota",
"America/Coral_Harbour",
"America/Bogota",
"America/Guayaquil",
"America/Port-au-Prince",
"America/Jamaica",
"America/Cayman",
"America/Panama",
"America/Lima",
"Etc/GMT+5"}},
{"SA Western Standard Time",
"Caracas, La Paz",
{"America/La_Paz",
"America/Antigua",
"America/Anguilla",
"America/Aruba",
"America/Barbados",
"America/St_Barthelemy",
"America/La_Paz",
"America/Kralendijk",
"America/Manaus America/Boa_Vista America/Eirunepe America/Porto_Velho America/Rio_Branco",
"America/Blanc-Sablon",
"America/Curacao",
"America/Dominica",
"America/Santo_Domingo",
"America/Grenada",
"America/Guadeloupe",
"America/Guyana",
"America/St_Kitts",
"America/St_Lucia",
"America/Marigot",
"America/Martinique",
"America/Montserrat",
"America/Puerto_Rico",
"America/Lower_Princes",
"America/Port_of_Spain",
"America/St_Vincent",
"America/Tortola",
"America/St_Thomas",
"Etc/GMT+4"}},
{"Samoa Standard Time", "Midway Island, Samoa", {"Pacific/Apia", "Pacific/Apia"}},
{"SE Asia Standard Time",
"Bangkok, Hanoi, Jakarta",
{"Asia/Bangkok",
"Antarctica/Davis",
"Indian/Christmas",
"Asia/Jakarta Asia/Pontianak",
"Asia/Phnom_Penh",
"Asia/Vientiane",
"Asia/Hovd",
"Asia/Bangkok",
"Asia/Saigon",
"Etc/GMT-7"}},
{"Singapore Standard Time",
"Kuala Lumpur, Singapore",
{"Asia/Singapore", "Asia/Brunei", "Asia/Makassar", "Asia/Kuala_Lumpur Asia/Kuching", "Asia/Manila", "Asia/Singapore", "Etc/GMT-8"}},
{"South Africa Standard Time",
"Harare, Pretoria",
{"Africa/Johannesburg",
"Africa/Bujumbura",
"Africa/Gaborone",
"Africa/Lubumbashi",
"Africa/Maseru",
"Africa/Blantyre",
"Africa/Maputo",
"Africa/Kigali",
"Africa/Mbabane",
"Africa/Johannesburg",
"Africa/Lusaka",
"Africa/Harare",
"Etc/GMT-2"}},
{"Sri Lanka Standard Time", "Sri Jayawardenepura", {"Asia/Colombo", "Asia/Colombo"}},
{"Taipei Standard Time", "Taipei", {"Asia/Taipei", "Asia/Taipei"}},
{"Tasmania Standard Time", "Hobart", {"Australia/Hobart", "Australia/Hobart Australia/Currie"}},
{"Tokyo Standard Time", "Osaka, Sapporo, Tokyo", {"Asia/Tokyo", "Asia/Jayapura", "Asia/Tokyo", "Pacific/Palau", "Asia/Dili", "Etc/GMT-9"}},
{"Tonga Standard Time", "Nuku'alofa", {"Pacific/Tongatapu", "Pacific/Enderbury", "Pacific/Fakaofo", "Pacific/Tongatapu", "Etc/GMT-13"}},
{"US Eastern Standard Time", "Indiana (East)", {"America/Indianapolis", "America/Indianapolis America/Indiana/Marengo America/Indiana/Vevay"}},
{"US Mountain Standard Time", "Arizona", {"America/Phoenix", "America/Dawson_Creek America/Creston", "America/Hermosillo", "America/Phoenix", "Etc/GMT+7"}},
{"Vladivostok Standard Time", "Vladivostok", {"Asia/Vladivostok", "Asia/Vladivostok Asia/Sakhalin"}},
{"W. Australia Standard Time", "Perth", {"Australia/Perth", "Antarctica/Casey", "Australia/Perth"}},
{"W. Central Africa Standard Time",
"West Central Africa",
{"Africa/Lagos",
"Africa/Luanda",
"Africa/Porto-Novo",
"Africa/Kinshasa",
"Africa/Bangui",
"Africa/Brazzaville",
"Africa/Douala",
"Africa/Algiers",
"Africa/Libreville",
"Africa/Malabo",
"Africa/Niamey",
"Africa/Lagos",
"Africa/Ndjamena",
"Africa/Tunis",
"Etc/GMT-1"}},
{"W. Europe Standard Time",
"Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna",
{"Europe/Berlin",
"Europe/Andorra",
"Europe/Vienna",
"Europe/Zurich",
"Europe/Berlin",
"Europe/Gibraltar",
"Europe/Rome",
"Europe/Vaduz",
"Europe/Luxembourg",
"Africa/Tripoli",
"Europe/Monaco",
"Europe/Malta",
"Europe/Amsterdam",
"Europe/Oslo",
"Europe/Stockholm",
"Arctic/Longyearbyen",
"Europe/San_Marino",
"Europe/Vatican"}},
{"West Asia Standard Time",
"Islamabad, Karachi, Tashkent",
{"Asia/Tashkent",
"Antarctica/Mawson",
"Asia/Oral Asia/Aqtau Asia/Aqtobe",
"Indian/Maldives",
"Indian/Kerguelen",
"Asia/Dushanbe",
"Asia/Ashgabat",
"Asia/Tashkent Asia/Samarkand",
"Etc/GMT-5"}},
{"West Pacific Standard Time",
"Guam, Port Moresby",
{"Pacific/Port_Moresby", "Antarctica/DumontDUrville", "Pacific/Truk", "Pacific/Guam", "Pacific/Saipan", "Pacific/Port_Moresby", "Etc/GMT-10"}},
{"Yakutsk Standard Time", "Yakuts", {"Asia/Yakutsk", "Asia/Yakutsk"}}};
static const int numWindowsTimezones = sizeof windowsTimezones / sizeof *windowsTimezones;
QString TimezoneConverter::fromHardcodedList(const QString &tz)
{
for (int i = 0; i < numWindowsTimezones; i++) {
const WindowsTimezone &windowsTimezone = windowsTimezones[i];
const QByteArray specifier(windowsTimezone.timezoneSpecifier);
const QByteArray windowsName(windowsTimezone.name);
if ((!specifier.isEmpty() && tz.contains(QString::fromUtf8(specifier))) || (!windowsName.isEmpty() && tz.contains(QString::fromUtf8(windowsName)))) {
// TODO find the olson timezone matching the local timezone if we have multiple to map to
return QString::fromLatin1(windowsTimezone.olson[0]);
}
}
return {};
}
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