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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| <?php | ||
| /* | ||
| * * | ||
| * * calendar App | ||
| * * | ||
| * * @copyright 2023 Anna Larch <[email protected]> | ||
| * * | ||
| * * @author Anna Larch <[email protected]> | ||
| * * | ||
| * * This library is free software; you can redistribute it and/or | ||
| * * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE | ||
| * * License as published by the Free Software Foundation; either | ||
| * * version 3 of the License, or any later version. | ||
| * * | ||
| * * This library 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 AFFERO GENERAL PUBLIC LICENSE for more details. | ||
| * * | ||
| * * You should have received a copy of the GNU Affero General Public | ||
| * * License along with this library. If not, see <http://www.gnu.org/licenses/>. | ||
| * * | ||
| * | ||
| */ | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| /* | ||
| * @copyright 2023 Anna Larch <[email protected]> | ||
| * | ||
| * @author 2023 Anna Larch <[email protected]> | ||
| * | ||
| * @license GNU AGPL version 3 or any later version | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero 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 Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
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| namespace OCA\Calendar\Service\Appointments; | ||
|
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| use Sabre\VObject\Component; | ||
| use Sabre\VObject\Component\VCalendar; | ||
| use Sabre\VObject\Component\VTimeZone; | ||
| use Sabre\VObject\TimeZoneUtil; | ||
| use function max; | ||
| use function min; | ||
|
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| class TimezoneGenerator { | ||
| /** | ||
| * Returns a VTIMEZONE component for a Olson timezone identifier | ||
| * with daylight transitions covering the given date range. | ||
| * | ||
| * @link https://gist.github.com/thomascube/47ff7d530244c669825736b10877a200 | ||
| * | ||
| * @param string $timezone Timezone | ||
| * @param integer $from Unix timestamp with first date/time in this timezone | ||
| * @param integer $to Unix timestap with last date/time in this timezone | ||
| * @psalm-suppress NoValue | ||
| * | ||
| * @return null|VTimeZone A Sabre\VObject\Component object representing a VTIMEZONE definition | ||
| * or null if no timezone information is available | ||
| */ | ||
| public function generateVtimezone(string $timezone, int $from, int $to): ?VTimeZone { | ||
| try { | ||
| $tz = new \DateTimeZone($timezone); | ||
| } catch (\Exception $e) { | ||
| return null; | ||
| } | ||
|
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| // get all transitions for one year back/ahead | ||
| $year = 86400 * 360; | ||
| $transitions = $tz->getTransitions($from - $year, $to + $year); | ||
|
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| $vcalendar = new VCalendar(); | ||
| $vtimezone = $vcalendar->createComponent('VTIMEZONE'); | ||
| $vtimezone->TZID = $timezone; | ||
|
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| $standard = $daylightStart = null; | ||
| foreach ($transitions as $i => $trans) { | ||
| $component = null; | ||
|
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| // skip the first entry... | ||
| if ($i === 0) { | ||
| // ... but remember the offset for the next TZOFFSETFROM value | ||
| $tzfrom = $trans['offset'] / 3600; | ||
| continue; | ||
| } | ||
|
|
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| // daylight saving time definition | ||
| if ($trans['isdst']) { | ||
| $daylightDefinition = $trans['ts']; | ||
| $daylightStart = $vcalendar->createComponent('DAYLIGHT'); | ||
| $component = $daylightStart; | ||
| } | ||
| // standard time definition | ||
| else { | ||
| $standardDefinition = $trans['ts']; | ||
| $standard = $vcalendar->createComponent('STANDARD'); | ||
| $component = $standard; | ||
| } | ||
|
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| if ($component) { | ||
| $date = new \DateTime($trans['time']); | ||
| $offset = $trans['offset'] / 3600; | ||
|
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| $component->DTSTART = $date->format('Ymd\THis'); | ||
| $component->TZOFFSETFROM = sprintf('%s%02d%02d', $tzfrom >= 0 ? '+' : '-', abs(floor($tzfrom)), ($tzfrom - floor($tzfrom)) * 60); | ||
| $component->TZOFFSETTO = sprintf('%s%02d%02d', $offset >= 0 ? '+' : '-', abs(floor($offset)), ($offset - floor($offset)) * 60); | ||
|
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| // add abbreviated timezone name if available | ||
| if (!empty($trans['abbr'])) { | ||
| $component->TZNAME = $trans['abbr']; | ||
| } | ||
|
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| $tzfrom = $offset; | ||
| $vtimezone->add($component); | ||
| } | ||
|
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| // we covered the entire date range | ||
| if ($standard && $daylightStart && min($standardDefinition, $daylightDefinition) < $from && max($standardDefinition, $daylightDefinition) > $to) { | ||
| break; | ||
| } | ||
| } | ||
|
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| // add X-MICROSOFT-CDO-TZID if available | ||
| $microsoftExchangeMap = array_flip(TimeZoneUtil::$microsoftExchangeMap); | ||
| if (!empty($microsoftExchangeMap) && array_key_exists($tz->getName(), $microsoftExchangeMap)) { | ||
| $vtimezone->add('X-MICROSOFT-CDO-TZID', $microsoftExchangeMap[$tz->getName()]); | ||
| } | ||
|
|
||
| return $vtimezone; | ||
| } | ||
| } |
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91
tests/php/unit/Service/Appointments/TimezoneGeneratorTest.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
| /** | ||
| * Calendar App | ||
| * | ||
| * @author 2023 Anna Larch <[email protected]> | ||
| * @copyright 2023 Anna Larch <[email protected]> | ||
| * | ||
| * This library is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE | ||
| * License as published by the Free Software Foundation; either | ||
| * version 3 of the License, or any later version. | ||
| * | ||
| * This library 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 AFFERO GENERAL PUBLIC LICENSE for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public | ||
| * License along with this library. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
| namespace OCA\Calendar\Tests\Unit\Service\Appointments; | ||
|
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| use ChristophWurst\Nextcloud\Testing\TestCase; | ||
| use OCA\Calendar\Service\Appointments\TimezoneGenerator; | ||
| use Sabre\VObject\Component\VTimeZone; | ||
| use Sabre\VObject\TimeZoneUtil; | ||
|
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| class TimezoneGeneratorTest extends TestCase { | ||
|
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| protected TimezoneGenerator $timezoneGenerator; | ||
| protected function setUp(): void { | ||
| $this->timezoneGenerator = new TimezoneGenerator(); | ||
| } | ||
|
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| /** | ||
| * @dataProvider providerDaylightSaving | ||
| */ | ||
| public function testWithDaylightSaving($timezone, $daytime, $standard, $msTimezoneId): void { | ||
| /** @var VTimeZone $generated */ | ||
| $generated = $this->timezoneGenerator->generateVtimezone($timezone, 1640991600, 1672527600); | ||
|
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| $this->assertEquals($timezone, $generated->TZID->getValue()); | ||
| $this->assertNotNull($generated->DAYLIGHT); | ||
| $this->assertCount($daytime, $generated->DAYLIGHT->getIterator()); | ||
| $this->assertNotNull($generated->STANDARD); | ||
| $this->assertCount($standard, $generated->STANDARD->getIterator()); | ||
| $this->assertEquals($generated->{'X-MICROSOFT-CDO-TZID'}->getValue(), $msTimezoneId); | ||
| } | ||
|
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| /** | ||
| * @dataProvider providerNoDaylightSaving | ||
| */ | ||
| public function testNoDaylightSaving($timezone, $daytime, $standard, $msTimezoneId): void { | ||
| /** @var VTimeZone $generated */ | ||
| $generated = $this->timezoneGenerator->generateVtimezone($timezone, 1640991600, 1672527600); | ||
|
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| $this->assertEquals($timezone, $generated->TZID->getValue()); | ||
| $this->assertNull($generated->DAYLIGHT); | ||
| $this->assertNull($generated->STANDARD); | ||
| $this->assertEquals($generated->{'X-MICROSOFT-CDO-TZID'}->getValue(), $msTimezoneId); | ||
| } | ||
|
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| public function testInvalid(): void { | ||
| /** @var VTimeZone $generated */ | ||
| $generated = $this->timezoneGenerator->generateVtimezone('Nonsense', 1640991600, 1672527600); | ||
|
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| $this->assertNull($generated); | ||
| } | ||
|
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| public function providerDaylightSaving(): array { | ||
| $microsoftExchangeMap = array_flip(TimeZoneUtil::$microsoftExchangeMap); | ||
| return [ | ||
| ['Europe/Berlin', 3, 3, $microsoftExchangeMap['Europe/Berlin']], | ||
| ['Europe/London', 3, 3, $microsoftExchangeMap['Europe/London']], | ||
| ['Australia/Adelaide', 3, 3, $microsoftExchangeMap['Australia/Adelaide']], | ||
| ]; | ||
| } | ||
|
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| public function providerNoDaylightSaving(): array { | ||
| $microsoftExchangeMap = array_flip(TimeZoneUtil::$microsoftExchangeMap); | ||
| return [ | ||
| ['Pacific/Midway', null, null, $microsoftExchangeMap['Pacific/Midway']], | ||
| ['Asia/Singapore', null, null, $microsoftExchangeMap['Asia/Singapore']], | ||
| ]; | ||
| } | ||
|
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|
|
||
| } |