Task::doPostActions

protected function doPostActions($state)
{
	if ($state->isModeCreate())
	{
		// todo: TODO TODO TODO: create processors instead of this operations

		// todo: think about "config object" that will allow to switch off some of these actions,
		// todo: this config object may support hierarchy and partial update
		// todo: example: ['notification' => ['enable' => true, 'add' => ['enable' => false]], 'cache' => ['reset' = ['enable' => true]]]
		// todo: we can use BitrixTasksUtilTypeStructureChecker to check such option structure, set default one, etc...

		// todo: refactor this later, get rid of CTasks completely

		// todo: NOTE: for add() this is okay, but for update() some fields may be missing,
		// todo: so its better to use actual data here, not from state (which eventually may be incomplete)

		// todo: BELOW: do other stuff related with SE_ managing and other additional "actions"
		// todo: it must not be hardcoded (as we do traditionally),
		// todo: but should look as some kind of high-level event handling to be able to register, un-register and optionally turn off additional "actions"

		$result = $state->getResult();

		$taskId = $this->getId();
		$userId = $this->getUserId();
		$data = $this->prepareLegacyData();
		$fullTaskData = $this->getData();

		if ($taskId)
		{
			StagesTable::pinInStage($taskId);
		}

		$groupId = $data['GROUP_ID'];
		$parentId = (int)$data['PARENT_ID'];

		$participants = [$data['CREATED_BY'], $data['RESPONSIBLE_ID']];
		if (isset($data['ACCOMPLICES']) && is_array($data['ACCOMPLICES']))
		{
			$participants = array_merge($participants, $data['ACCOMPLICES']);
		}
		if (isset($data['AUDITORS']) && is_array($data['AUDITORS']))
		{
			$participants = array_merge($participants, $data['AUDITORS']);
		}
		$participants = array_unique($participants);

		// add to favorite, if parent is in the favorites too
		if ($parentId && FavoriteTable::check(['TASK_ID' => $parentId, 'USER_ID' => $userId]))
		{
			FavoriteTable::add(['TASK_ID' => $taskId, 'USER_ID' => $userId], ['CHECK_EXISTENCE' => false]);
		}

		if ($groupId)
		{
			ProjectLastActivityTable::update($groupId, ['ACTIVITY_DATE' => $fullTaskData['ACTIVITY_DATE']]);
		}

		// note that setting occur as is deprecated. use access checker switch off instead
		$occurAsUserId = (User::getOccurAsId() ?: $userId);

		CTaskNotifications::sendAddMessage(
			array_merge($data, ['CHANGED_BY' => $occurAsUserId]),
			[
				'SPAWNED_BY_AGENT' =>
					($data['SPAWNED_BY_AGENT'] ?? null) === 'Y'
					|| ($data['SPAWNED_BY_AGENT'] ?? null) === true,
			]
		);

		BitrixTasksInternalsUserOptionTask::onTaskAdd($data);

		CounterCounterService::addEvent(
			CounterEventEventDictionary::EVENT_AFTER_TASK_ADD,
			$data
		);

		// changes log
		$this->addLogRecord([
			"TASK_ID" => $taskId,
			"USER_ID" => $occurAsUserId,
			"CREATED_DATE" => $fullTaskData['CREATED_DATE'],
			"FIELD" => "NEW",
		], $result);

		SearchTask::index($data); // todo: move this into a special processor
		SearchIndex::setTaskSearchIndex($taskId, $fullTaskData);

		CTaskSync::addItem($data); // MS Exchange

		$commentPoster = CommentPoster::getInstance($taskId, $data['CREATED_BY'] ?? 0);
		$commentPoster->postCommentsOnTaskAdd($data);

		$this->sendPullEvents($data, $result);

		$batchState = static::getBatchState();
		$batchState->accumulateArray('USER', $participants);

		if ($groupId)
		{
			$batchState->accumulateArray('GROUP', [$groupId]);
		}

		// todo: this should be moved inside PARENT_ID field controller:
		if ($parentId)
		{
			Dependence::attachNew($taskId, $parentId);
		}

		// todo: move this into a separate processor
		$this->processSchedulerAfter();

		// if batch state is off, this will fire immediately.
		// otherwise, this will fire only when somebody calls ::leaveBatchState() on this class
		$batchState->fireLeaveCallback();

		BizprocListener::onTaskAdd($taskId, $data);
	}
	elseif ($state->isModeUpdate())
	{
		// todo: DO NOT remove template in case of REPLICATE falls to N
		$taskId = $this->getId();
		if ($taskId)
		{
			StagesTable::pinInStage($taskId);
		}
	}
}