is::Add

function Add($arFields, $arParams = array())
{
	global $DB;

	$executiveUserId = null;
	if (isset($arParams['USER_ID']))
		$executiveUserId = (int) $arParams['USER_ID'];
	elseif ($userId = \Bitrix\Tasks\Util\User::getId())
		$executiveUserId = $userId;

	$occurAsUserId = CTasksTools::getOccurAsUserId();
	if ( ! $occurAsUserId )
		$occurAsUserId = ($executiveUserId ? $executiveUserId : 1);

	if ($this->CheckFields($arFields))
	{
		$curDuration = 0;
		$rsTask = CTasks::getList(
			array(),
			array('ID' => $arFields['TASK_ID']),
			array('ID', 'TIME_SPENT_IN_LOGS')
		);
		if ($rsTask && ($arTask = $rsTask->fetch()))
			$curDuration = (int) $arTask['TIME_SPENT_IN_LOGS'];

		// Maintance backward compatibility
		if (isset($arFields['MINUTES'], $arFields['SECONDS']))
		{
			CTaskAssert::logError('[0x1e85844c] ');
			CTaskAssert::assert(false);
		}

		if (isset($arFields['SECONDS']))
			$arFields['MINUTES'] = (int) round($arFields['SECONDS'] / 60, 0);
		elseif (isset($arFields['MINUTES']))
			$arFields['SECONDS'] = 60 * $arFields['MINUTES'];
		else
		{
			CTaskAssert::logError('[0x85bbae77] ');
			CTaskAssert::assert(false);
		}

		foreach(GetModuleEvents('tasks', 'OnBeforeTaskElapsedTimeAdd', true) as $arEvent)
		{
			if (ExecuteModuleEventEx($arEvent, array(&$arFields))===false)
				return false;
		}

		$arFields['SOURCE'] = CTaskElapsedItem::SOURCE_MANUAL;
		if (isset($arParams['SOURCE_SYSTEM']) && ($arParams['SOURCE_SYSTEM'] === 'Y'))
			$arFields['SOURCE'] = CTaskElapsedItem::SOURCE_SYSTEM;

		if ($arFields['CREATED_DATE'])
			$createdDate = Bitrix\Main\Type\DateTime::createFromUserTime($arFields['CREATED_DATE']);
		else
			$createdDate = new Bitrix\Main\Type\DateTime();

		$addResult = \Bitrix\Tasks\Internals\Task\ElapsedTimeTable::add(array(
			"CREATED_DATE" => $createdDate,
			"DATE_START" => Bitrix\Main\Type\DateTime::createFromUserTime($arFields['DATE_START'] ?? null),
			"DATE_STOP" => Bitrix\Main\Type\DateTime::createFromUserTime($arFields['DATE_STOP'] ?? null),
			"USER_ID" => $arFields["USER_ID"],
			"TASK_ID" => $arFields["TASK_ID"],
			"MINUTES" => $arFields["MINUTES"],
			"SECONDS" => $arFields["SECONDS"],
			"SOURCE" => $arFields["SOURCE"],
			"COMMENT_TEXT" => $arFields["COMMENT_TEXT"],
		));

		$ID = $addResult->isSuccess()? $addResult->getId(): false;

		$oLog = new CTaskLog();
		$oLog->Add(array(
			'TASK_ID'       =>  $arFields['TASK_ID'],
			'USER_ID'       =>  $occurAsUserId,
			'~CREATED_DATE' =>  $DB->currentTimeFunction(),
			'FIELD'         => 'TIME_SPENT_IN_LOGS',
			'FROM_VALUE'    =>  $curDuration,
			'TO_VALUE'      =>  $curDuration + (int) $arFields['SECONDS']
		));

		foreach(GetModuleEvents('tasks', 'OnTaskElapsedTimeAdd', true) as $arEvent)
			ExecuteModuleEventEx($arEvent, array($ID, $arFields));

		return $ID;
	}

	return false;
}