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/*
* Copyright (C) 2012 Christian Mollekopf <mollekopf@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "timezoneconverter.h"
#include <ktimezone.h>
#include <ksystemtimezone.h>
#include <kdebug.h>
#include <QRegExp>
#include <QStringList>
#include "kolabformat/errorhandler.h"
QString TimezoneConverter::normalizeTimezone(const QString& tz)
{
KTimeZone timezone = KSystemTimeZones::zone(tz); //Needs ktimezoned (timezone daemon running) http://api.kde.org/4.x-api/kdelibs-apidocs/kdecore/html/classKSystemTimeZones.html
if (timezone.isValid()) {
return tz;
} else if (!KSystemTimeZones::isTimeZoneDaemonAvailable()) {
Error() << "ktimezoned is not available and required for timezone interpretation";
}
//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);
}
if (guessedTimezone.isEmpty()) {
//slower but also finds outdated zones
timezone = KSystemTimeZones::readZone(tz);
if (timezone.isValid()) {
return tz;
}
}
Debug() << "Guessed timezone and found: " << guessedTimezone;
return guessedTimezone;
}
QString TimezoneConverter::fromGMTOffsetTimezone(const QString& tz)
{
Q_UNUSED(tz);
return QString();
}
QString TimezoneConverter::fromCityName(const QString& tz)
{
const KTimeZones::ZoneMap zones = KSystemTimeZones::zones();
KTimeZones::ZoneMap::const_iterator it = zones.constBegin();
QHash<QString, QString> countryMap;
for(;it != zones.constEnd(); it++) {
const QString cityName = it.key().split('/').last();
// kDebug() << it.key() << it.value().name() << cityName;
Q_ASSERT(!countryMap.contains(cityName));
countryMap.insert(cityName, it.key());
}
QRegExp locationFinder("\\b([a-zA-Z])+\\b", Qt::CaseSensitive, QRegExp::RegExp2);
int pos = 0;
while (pos >= 0) {
pos = locationFinder.indexIn(tz, pos);
if (pos >= 0) {
++pos;
}
const QString location = locationFinder.capturedTexts().first();
// kDebug() << "location " << location;
if (countryMap.contains(location)) {
// kDebug() << "found match " << countryMap.value(location);
return countryMap.value(location);
}
}
return QString();
}
//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(specifier)) ||
(!windowsName.isEmpty() && tz.contains(windowsName))) {
//TODO find the olson timezone matching the local timezone if we have multiple to map to
return QString::fromLatin1(windowsTimezone.olson[0]);
}
}
return QString();
}
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