create task on first login

use OCP\AppFramework\Bootstrap\IBootContext;

use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;

use OCA\EcloudThemeHelper\Listeners\BeforeTemplateRenderedListener;

use OCA\DAV\CalDAV\CalDavBackend;

use OCP\Defaults;

use OCP\IUser;

use OCP\Util;

use OCP\EventDispatcher\IEventDispatcher;

use Symfony\Component\EventDispatcher\EventDispatcherInterface;

use Symfony\Component\EventDispatcher\GenericEvent;

class Application extends App implements IBootstrap {

	public const APP_ID = 'ecloud-theme-helper';

	public const TASKS_CALENDAR_URI = 'tasks';

	public const TASKS_CALENDAR_NAME = 'Tasks';

	public function __construct(array $urlParams = []) {

		parent::__construct(self::APP_ID, $urlParams);

	}

	public function boot(IBootContext $context): void {

		$context->injectFn([$this, 'createTasksCalendar']);

	}

	public function createTasksCalendar(CalDavBackend $calDav, Defaults $themingDefaults, EventDispatcherInterface $dispatcher): void {

		$dispatcher->addListener(IUser::class . '::firstLogin', function (GenericEvent $event) use ($calDav, $themingDefaults) {

			$user = $event->getSubject();

			if (!$user instanceof IUser) {

				return;

			}

			$userId = $user->getUID();

			$principal = 'principals/users/' . $userId;

			if ($calDav->getCalendarsForUserCount($principal) === 0) {

					$calDav->createCalendar($principal, self::TASKS_CALENDAR_URI, [

						'{DAV:}displayname' => self::TASKS_CALENDAR_NAME,

						'{http://apple.com/ns/ical/}calendar-color' => $themingDefaults->getColorPrimary(),

						'components' => 'VEVENT'

					]);

			}

		});

	}

}