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authorAndrew Manning <tamanning@zoho.com>2016-05-11 05:54:20 -0400
committerAndrew Manning <tamanning@zoho.com>2016-05-11 05:54:20 -0400
commitd968fc51eab8b0fb259ecbeae517056b99554017 (patch)
tree10e551cff9fefbefbfd7e5031b57320116bb7fce /vendor/sabre/vobject/lib/TimeZoneUtil.php
parentc7698e4dc388b7d9a9db368672cb057c1d4d3a01 (diff)
parent4dd3839c41e18d9724855e7955d8737b6f52dcd6 (diff)
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Merge remote-tracking branch 'upstream/dev' into plugin-repo
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+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * 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 {
+
+ static $map = null;
+
+ /**
+ * List of microsoft exchange timezone ids.
+ *
+ * Source: http://msdn.microsoft.com/en-us/library/aa563018(loband).aspx
+ */
+ 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 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.
+ *
+ * @param string $tzid
+ * @param Sabre\VObject\Component $vcalendar
+ *
+ * @return DateTimeZone
+ */
+ static function getTimeZone($tzid, Component $vcalendar = null, $failIfUncertain = false) {
+
+ // First we will just see if the tzid is a support timezone identifier.
+ //
+ // The only exception is if the timezone starts with (. This is to
+ // handle cases where certain microsoft products generate timezone
+ // identifiers that for instance look like:
+ //
+ // (GMT+01.00) Sarajevo/Warsaw/Zagreb
+ //
+ // Since PHP 5.5.10, the first bit will be used as the timezone and
+ // this method will return just GMT+01:00. This is wrong, because it
+ // doesn't take DST into account.
+ if ($tzid[0] !== '(') {
+
+ // PHP has a bug that logs PHP warnings even it shouldn't:
+ // https://bugs.php.net/bug.php?id=67881
+ //
+ // That's why we're checking if we'll be able to successfull instantiate
+ // \DateTimeZone() before doing so. Otherwise we could simply instantiate
+ // and catch the exception.
+ $tzIdentifiers = \DateTimeZone::listIdentifiers();
+
+ try {
+ if (
+ (in_array($tzid, $tzIdentifiers)) ||
+ (preg_match('/^GMT(\+|-)([0-9]{4})$/', $tzid, $matches)) ||
+ (in_array($tzid, self::getIdentifiersBC()))
+ ) {
+ return new \DateTimeZone($tzid);
+ }
+ } catch (\Exception $e) {
+ }
+
+ }
+
+ self::loadTzMaps();
+
+ // Next, we check if the tzid is somewhere in our tzid map.
+ if (isset(self::$map[$tzid])) {
+ return new \DateTimeZone(self::$map[$tzid]);
+ }
+
+ // Maybe the author was hyper-lazy and just included an offset. We
+ // support it, but we aren't happy about it.
+ if (preg_match('/^GMT(\+|-)([0-9]{4})$/', $tzid, $matches)) {
+
+ // Note that the path in the source will never be taken from PHP 5.5.10
+ // onwards. PHP 5.5.10 supports the "GMT+0100" style of format, so it
+ // already gets returned early in this function. Once we drop support
+ // for versions under PHP 5.5.10, this bit can be taken out of the
+ // source.
+ // @codeCoverageIgnoreStart
+ return new \DateTimeZone('Etc/GMT' . $matches[1] . ltrim(substr($matches[2], 0, 2), '0'));
+ // @codeCoverageIgnoreEnd
+ }
+
+ if ($vcalendar) {
+
+ // If that didn't work, we will scan VTIMEZONE objects
+ foreach ($vcalendar->select('VTIMEZONE') as $vtimezone) {
+
+ if ((string)$vtimezone->TZID === $tzid) {
+
+ // Some clients add 'X-LIC-LOCATION' with the olson name.
+ if (isset($vtimezone->{'X-LIC-LOCATION'})) {
+
+ $lic = (string)$vtimezone->{'X-LIC-LOCATION'};
+
+ // Libical generators may specify strings like
+ // "SystemV/EST5EDT". For those we must remove the
+ // SystemV part.
+ if (substr($lic, 0, 8) === 'SystemV/') {
+ $lic = substr($lic, 8);
+ }
+
+ return self::getTimeZone($lic, null, $failIfUncertain);
+
+ }
+ // Microsoft may add a magic number, which we also have an
+ // answer for.
+ if (isset($vtimezone->{'X-MICROSOFT-CDO-TZID'})) {
+ $cdoId = (int)$vtimezone->{'X-MICROSOFT-CDO-TZID'}->getValue();
+
+ // 2 can mean both Europe/Lisbon and Europe/Sarajevo.
+ if ($cdoId === 2 && strpos((string)$vtimezone->TZID, 'Sarajevo') !== false) {
+ return new \DateTimeZone('Europe/Sarajevo');
+ }
+
+ if (isset(self::$microsoftExchangeMap[$cdoId])) {
+ return new \DateTimeZone(self::$microsoftExchangeMap[$cdoId]);
+ }
+ }
+
+ }
+
+ }
+
+ }
+
+ if ($failIfUncertain) {
+ throw new \InvalidArgumentException('We were unable to determine the correct PHP timezone for tzid: ' . $tzid);
+ }
+
+ // If we got all the way here, we default to UTC.
+ return new \DateTimeZone(date_default_timezone_get());
+
+ }
+
+ /**
+ * This method will load in all the tz mapping information, if it's not yet
+ * done.
+ */
+ static function loadTzMaps() {
+
+ if (!is_null(self::$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
+ */
+ static function getIdentifiersBC() {
+ return include __DIR__ . '/timezonedata/php-bc.php';
+ }
+
+}