CIMMessenger::Like

static function Like($id, $action = 'auto', $userId = null, $byEvent = false, $withReaction = true)
{
	if (!CModule::IncludeModule('pull'))
		return false;

	global $USER;
	$userId = is_null($userId)? $USER->GetId(): intval($userId);
	if ($userId <= 0)
		return false;

	$action = in_array($action, Array('plus', 'minus'))? $action: 'auto';

	$message = self::GetById($id);
	if (!$message)
		return false;

	$relations = self::GetRelationById($id);

	$result = BitrixImModelChatTable::getList(Array(
		'filter'=>Array(
			'=ID' => $message['CHAT_ID']
		)
	));
	$chat = $result->fetch();
	if ($chat['ENTITY_TYPE'] != 'LIVECHAT')
	{
		if (!isset($relations[$userId]))
			return false;
	}

	if (!$byEvent && $chat['ENTITY_TYPE'] == 'LINES')
	{
		[$connectorType, $lineId, $chatId] = explode("|", $chat['ENTITY_ID']);
		if ($connectorType == "livechat")
		{
			foreach($message['PARAMS']['CONNECTOR_MID'] as $mid)
			{
				self::Like($mid, $action, $userId, true, false);
			}
		}
	}
	else if (!$byEvent && $chat['ENTITY_TYPE'] == 'LIVECHAT')
	{
		foreach($message['PARAMS']['CONNECTOR_MID'] as $mid)
		{
			self::Like($mid, $action, $userId, true, false);
		}
	}

	$isLike = false;
	if (isset($message['PARAMS']['LIKE']))
	{
		$isLike = in_array($userId, $message['PARAMS']['LIKE']);
	}

	if ($isLike && $action == 'plus')
	{
		return false;
	}
	else if (!$isLike && $action == 'minus')
	{
		return false;
	}

	$isLike = true;
	if (isset($message['PARAMS']['LIKE']))
	{
		$like = $message['PARAMS']['LIKE'];
		$selfLike = array_search($userId, $like);
		if ($selfLike !== false)
		{
			$isLike = false;
			unset($like[$selfLike]);
		}
		else
		{
			$like[] = $userId;
		}
	}
	else
	{
		$like = Array($userId);
	}

	sort($like);
	CIMMessageParam::Set($id, Array('LIKE' => $like));

	if ($withReaction)
	{
		$messageObject = new BitrixImV2Message([
			'ID' => $message['ID'],
			'CHAT_ID' => $message['CHAT_ID'],
			'AUTHOR_ID' => $message['AUTHOR_ID'],
			'MESSAGE' => $message['MESSAGE'],
		]);
		$reactionService = new BitrixImV2MessageReactionReactionService($messageObject, false);

		if ($isLike)
		{
			$reactionService->addReaction(BitrixImV2MessageReactionReactionItem::LIKE);
		}
		else
		{
			$reactionService->deleteReaction(BitrixImV2MessageReactionReactionItem::LIKE);
		}
	}

	if ($message['AUTHOR_ID'] > 0 && $message['AUTHOR_ID'] != $userId && $isLike && $chat['ENTITY_TYPE'] != 'LIVECHAT')
	{
		$message['MESSAGE'] = self::PrepareParamsForPush($message);

		$isChat = $chat && $chat['TITLE'] <> '';

		$dot = mb_strlen($message['MESSAGE']) >= 200? '...': '';
		$message['MESSAGE'] = mb_substr($message['MESSAGE'], 0, 199).$dot;
		$message['MESSAGE'] = $message['MESSAGE'] <> ''? $message['MESSAGE']: '-';

		/*$arMessageFields = array(
			"MESSAGE_TYPE" => IM_MESSAGE_SYSTEM,
			"TO_USER_ID" => $message['AUTHOR_ID'],
			"FROM_USER_ID" => $userId,
			"NOTIFY_TYPE" => IM_NOTIFY_FROM,
			"NOTIFY_MODULE" => "im",
			"NOTIFY_EVENT" => "like",
			"NOTIFY_TAG" => "RATING|IM|".($isChat? 'G':'P')."|".($isChat? $chat['ID']: $userId)."|".$id,
			"NOTIFY_MESSAGE" => GetMessage($isChat? 'IM_MESSAGE_LIKE': 'IM_MESSAGE_LIKE_PRIVATE', Array(
				'#MESSAGE#' => $message['MESSAGE'],
				'#TITLE#' => $isChat? '[CHAT='.$chat['ID'].']'.$chat['TITLE'].'[/CHAT]': $chat['TITLE']
			)),
			"NOTIFY_MESSAGE_OUT" => GetMessage($isChat? 'IM_MESSAGE_LIKE': 'IM_MESSAGE_LIKE_PRIVATE', Array(
				'#MESSAGE#' => $message['MESSAGE'],
				'#TITLE#' => $chat['TITLE']
			)),
		);
		CIMNotify::Add($arMessageFields);*/
	}

	$pushUsers = $like;
	$pushUsers[] = $message['AUTHOR_ID'];

	$arPullMessage = Array(
		'id' => (int)$id,
		'dialogId' => 0,
		'chatId' => (int)$chat['ID'],
		'senderId' => (int)$userId,
		'set' => (bool)$isLike,
		'users' => $like
	);

	if ($chat['TYPE'] == IM_MESSAGE_PRIVATE)
	{
		$fromUserId = (int)$userId;
		foreach ($relations as $rel)
		{
			if ($rel['USER_ID'] != $fromUserId)
			{
				$toUserId = (int)$rel['USER_ID'];
			}
		}
		$dialogId = $toUserId;

		BitrixPullEvent::add($fromUserId, Array(
			'module_id' => 'im',
			'command' => 'messageLike',
			'params' => array_merge($arPullMessage, ['dialogId' => $toUserId]),
			'extra' => BitrixImCommon::getPullExtra()
		));

		BitrixPullEvent::add($toUserId, Array(
			'module_id' => 'im',
			'command' => 'messageLike',
			'params' => array_merge($arPullMessage, ['dialogId' => $fromUserId]),
			'extra' => BitrixImCommon::getPullExtra()
		));
	}
	else
	{
		$dialogId = 'chat'.$chat['ID'];
		$arPullMessage['dialogId'] = $dialogId;

		if ($chat['ENTITY_TYPE'] == 'LINES')
		{
			foreach ($relations as $rel)
			{
				if ($rel["EXTERNAL_AUTH_ID"] == 'imconnector')
				{
					unset($relations[$rel["USER_ID"]]);
				}
			}
		}

		BitrixPullEvent::add(array_keys($relations), Array(
			'module_id' => 'im',
			'command' => 'messageLike',
			'params' => $arPullMessage,
			'extra' => BitrixImCommon::getPullExtra()
		));

		if ($chat['TYPE'] == IM_MESSAGE_OPEN || $chat['TYPE'] == IM_MESSAGE_OPEN_LINE)
		{
			CPullWatch::AddToStack('IM_PUBLIC_'.$chat['ID'], Array(
				'module_id' => 'im',
				'command' => 'messageLike',
				'params' => $arPullMessage,
				'extra' => BitrixImCommon::getPullExtra()
			));
		}
	}

	foreach(GetModuleEvents("im", "OnAfterMessagesLike", true) as $arEvent)
	{
		ExecuteModuleEventEx($arEvent, array(array(
			'DIALOG_ID' => $dialogId,
			'CHAT' => $chat,
			'MESSAGE' => $message,
			'ACTION' => $action,
			'USER_ID' => $userId,
			'BY_EVENT' => $byEvent
		)));
	}

	return $like;
}