Chat::update

public function update($fields)
{
	$result = false;

	if($this->isDataLoaded())
	{
		foreach($fields as $field => $value)
		{
			if ($this->chat[$field] === $value)
			{
				unset($fields[$field]);
			}
			else
			{
				$this->chat[$field] = $value;
			}
		}

		if (!empty($fields))
		{
			ChatTable::update($this->chat['ID'], $fields);

			$relations = CIMChat::GetRelationById($this->chat['ID'], false, true, false);
			foreach ($relations as $rel)
			{
				CIMContactList::CleanChatCache($rel['USER_ID']);

				if (isset($fields['AUTHOR_ID']))
				{
					if ($rel['USER_ID'] == $this->chat['AUTHOR_ID'])
					{
						RelationTable::update($rel['ID'], Array('MANAGER' => 'N'));
					}
					if ($rel['USER_ID'] == $fields['AUTHOR_ID'])
					{
						RelationTable::update($rel['ID'], Array('MANAGER' => 'Y'));
					}
				}
			}

			if (array_key_exists('AUTHOR_ID', $fields))
			{
				//CRM
				if(!empty($fields['AUTHOR_ID']) && !User::getInstance($fields['AUTHOR_ID'])->isBot())
				{
					$session = new Session();
					$session->setChat($this);

					$loadSession = $session->load(Array(
						'USER_CODE' => $this->chat['ENTITY_ID']
					));
					if($loadSession)
					{
						$crmManager = new Crm($session);

						$crmManager->setOperatorId($fields['AUTHOR_ID'], false);
					}
				}
				//END CRM

				$parsedUserCode = SessionCommon::parseUserCode($this->chat['ENTITY_ID']);
				if (BitrixImOpenLinesConnector::isLiveChat($parsedUserCode['CONNECTOR_ID']))
				{
					$lineId = Queue::getActualLineId([
						'LINE_ID' =>  $parsedUserCode['CONFIG_ID'],
						'USER_CODE' => $this->chat['ENTITY_ID']
					]);

					PullEvent::add($parsedUserCode['CONNECTOR_USER_ID'], Array(
						'module_id' => 'imopenlines',
						'command' => 'sessionOperatorChange',
						'params' => Array(
							'chatId' => (int)$parsedUserCode['EXTERNAL_CHAT_ID'],
							'operatorChatId' => (int)$this->chat['ID'],
							'operator' => Rest::objectEncode(
								Queue::getUserData($lineId, $fields['AUTHOR_ID'])
							)
						)
					));
				}
			}
		}

		$result = true;
	}

	return $result;
}