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Use recurrence instance to build iMip email
instead of the main VEVENT of a repeating event Fixes part of nextcloud/calendar#3919 Signed-off-by: Anna Larch <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,123 @@ | ||
| <?php | ||
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| declare(strict_types=1); | ||
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| /** | ||
| * @copyright 2022 Anna Larch <[email protected]> | ||
| * | ||
| * @author 2022 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/>. | ||
| * | ||
| */ | ||
| namespace OCA\DAV\CalDAV; | ||
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| use OCA\DAV\AppInfo\Application; | ||
| use OCA\DAV\CalDAV\Schedule\IMipService; | ||
| use OCP\AppFramework\Utility\ITimeFactory; | ||
| use OCP\IConfig; | ||
| use Sabre\VObject\Component\VCalendar; | ||
| use Sabre\VObject\Component\VEvent; | ||
| use Sabre\VObject\Component\VTimeZone; | ||
| use Sabre\VObject\Component\VTodo; | ||
| use function max; | ||
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| class EventComparisonService { | ||
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| /** @var string[] */ | ||
| private const EVENT_DIFF = [ | ||
| 'RECURRENCE-ID', | ||
| 'RRULE', | ||
| 'SEQUENCE', | ||
| 'LAST-MODIFIED' | ||
| ]; | ||
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| /** | ||
| * If found, remove the event from $eventsToFilter that | ||
| * is identical to the passed $filterEvent | ||
| * and return whether an identical event was found | ||
| * | ||
| * This function takes into account the SEQUENCE, | ||
| * RRULE, RECURRENCE-ID and LAST-MODIFIED parameters | ||
| * | ||
| * @param VEvent $filterEvent | ||
| * @param array $eventsToFilter | ||
| * @return bool true if there was an identical event found and removed, false if there wasn't | ||
| */ | ||
| private function removeIfUnchanged(VEvent $filterEvent, array &$eventsToFilter): bool { | ||
| $filterEventData = []; | ||
| foreach(self::EVENT_DIFF as $eventDiff) { | ||
| $filterEventData[] = IMipService::readPropertyWithDefault($filterEvent, $eventDiff, ''); | ||
| } | ||
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| /** @var VEvent $component */ | ||
| foreach ($eventsToFilter as $k => $eventToFilter) { | ||
| $eventToFilterData = []; | ||
| foreach(self::EVENT_DIFF as $eventDiff) { | ||
| $eventToFilterData[] = IMipService::readPropertyWithDefault($eventToFilter, $eventDiff, ''); | ||
| } | ||
| // events are identical and can be removed | ||
| if (empty(array_diff($filterEventData, $eventToFilterData))) { | ||
| unset($eventsToFilter[$k]); | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
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| /** | ||
| * Compare two VCalendars with each other and find all changed elements | ||
| * | ||
| * Returns an array of old and new events | ||
| * | ||
| * Old events are only detected if they are also changed | ||
| * If there is no corresponding old event for a VEvent, it | ||
| * has been newly created | ||
| * | ||
| * @param VCalendar $new | ||
| * @param VCalendar|null $old | ||
| * @return array<string, VEvent[]> | ||
| */ | ||
| public function findModified(VCalendar $new, ?VCalendar $old): array { | ||
| $newEventComponents = $new->getComponents(); | ||
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| foreach ($newEventComponents as $k => $event) { | ||
| if(!$event instanceof VEvent) { | ||
| unset($newEventComponents[$k]); | ||
| } | ||
| } | ||
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| if(empty($old)) { | ||
| return ['old' => null, 'new' => $newEventComponents]; | ||
| } | ||
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| $oldEventComponents = $old->getComponents(); | ||
| if(is_array($oldEventComponents) && !empty($oldEventComponents)) { | ||
| foreach ($oldEventComponents as $k => $event) { | ||
| if(!$event instanceof VEvent) { | ||
| unset($oldEventComponents[$k]); | ||
| continue; | ||
| } | ||
| if($this->removeIfUnchanged($event, $newEventComponents)) { | ||
| unset($oldEventComponents[$k]); | ||
| } | ||
| } | ||
| } | ||
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| return ['old' => array_values($oldEventComponents), 'new' => array_values($newEventComponents)]; | ||
| } | ||
| } |
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