Getting error in sending system notification

[sanidhya1712]

I am using quickblox system notification in my platform for sending live notifications in NodeJs.

First time I try to send live notification, It works perfectly fine but when I try to send notification afterwards, I am getting the following error, even though it send the notification.

TypeError: Cannot read property 'querySelector' of null at Object.getElementText (/abc/dropN/did/node_modules/quickblox/src/modules/chat/qbChatHelpers.js:123:26) at ChatProxy._onSystemMessageListener (/abc/dropN/did/node_modules/quickblox/src/modules/chat/qbChat.js:641:42) at Client. (/abc/dropN/did/node_modules/quickblox/src/modules/chat/qbChat.js:862:30) at Client.emit (events.js:315:20) at Client.EventEmitter.emit (domain.js:482:12) at Client._handleStanza (/abc/dropN/did/node_modules/node-xmpp-client/lib/Client.js:227:12) at Client.onStanza (/abc/dropN/did/node_modules/node-xmpp-client/lib/Client.js:221:8) at Connection.emit (events.js:315:20) at Connection.EventEmitter.emit (domain.js:482:12) at Connection.onStanza (/abc/dropN/did/node_modules/node-xmpp-core/lib/Connection.js:377:10) at StreamParser. (/abc/dropN/did/node_modules/node-xmpp-core/lib/Connection.js:231:10) at StreamParser.emit (events.js:315:20) at StreamParser.EventEmitter.emit (domain.js:482:12) at SaxLtx. (/abc/dropN/did/node_modules/@xmpp/streamparser/index.js:69:14) at SaxLtx.emit (events.js:315:20)

Due to this, my code keeps crashing. Is there any way through which I can prevent this error and send the system notifications seamlessly.

Here is my code through which I am sending these notification.

QB.init(APPLICATION_ID, AUTH_KEY, AUTH_SECRET, ACCOUNT_KEY); var params = { userId: 121312, password: XXXXXYYYYYYY, }; console.log(params); QB.createSession({ userId: 121312, password: XXXXXYYYYYYY, }, function (err, result1) { if (err) { console.log('Something went wrong: ' + JSON.stringify(err)); reject(err) } else { console.log("new session created---", JSON.stringify(result1)); QB.chat.connect({ userId: 121312, password: XXXXXYYYYYYY, }, async function (error, contactList) { if (error) { console.log('not connected to chat', error); reject(error) } else { console.log(error, 'connected to chat', contactList); var message = { body: "System_notification", extension: { param1: "value1", param2: "value2", }, }; var opponentId = 12321321; try { message.id = QB.chat.sendSystemMessage(opponentId, message); console.log("Notification sent", message.id) resolve("notification sent") // or message.id = QB.chat.sendSystemMessage(opponentId, message) if message ID is needed } catch (e) { if (e.name === "ChatNotConnectedError") { console.log("not connected") reject(e) } } } }); } });

[ghost]

Hello, I assume that the issue is related to execution of code - the context. Please make sure that QuickBlox JavaScript SDK is initialized correctly and you have already followed our official documentation: https://docs.quickblox.com/docs/js-users#before-you-begin

Please refactor your code as we can see that the issue is outside from QuickBlox JavaScript SDK and related to Node implementation.

Unfortunately, we do not provide support with Node.js.

[sanidhya1712]

var QuickBlox = require('quickblox').QuickBlox; var QB = new QuickBlox(); QB.init(APPLICATION_ID, AUTH_KEY, AUTH_SECRET, ACCOUNT_KEY);

This is how I have initialized the quickblox. Is this an incorrect way to initialize because I have followed the documentation. I have also added the code with I am using above. Is there any issue with that ?

Error which I am getting is in quickblox node modules, So I don't think that it's an nodejs issue.

[ghost]

@sanidhya1712 The init seems to be correct. You may check our sample: https://github.com/QuickBlox/quickblox-javascript-sdk/tree/gh-pages/samples/chat Also, please make sure that you use the latest version of the SDK: https://github.com/QuickBlox/quickblox-javascript-sdk/releases/tag/2.13.11 You can modify the sample by adding your notification functionality to identify the issue. Additionally, please specify where exactly you are getting the error.

[sanidhya1712]

Hi @QB-nikolay-zolotarov , All the sample chat code is from the frontend perspective. We already have a running code on our frontend application but the issue we are facing are on backend side(NodeJs) while send system notification.

Do you have any sample of code from backend perspective?

[ghost]

@sanidhya1712 Hello, unfortunately, we don't have backend (Node.js) samples. As the JS sample works as expected, I assume that the issue is related to the Node.js implementation. Unfortunately, we do not provide support with Node.js. Please review the implementation on your end.

[sanidhya1712]

@QB-nikolay-zolotarov This problem is not about Nodejs. We have written just a piece of javascript code, by referring Quickblox documentation . Can we explain the reason that when this error occurs in quickblox node module?

[ghost]

@sanidhya1712 To investigate the issue further, please provide a sample and step-by-step instructions on how to reproduce the issue.

[sanidhya1712]

@QB-nikolay-zolotarov Sample code- var QuickBlox = require('quickblox').QuickBlox; var QB = new QuickBlox(); async function sendSystemNotification(req) { return new Promise(async (resolve, reject) => { console.log("here"); // let adminSession = await createSession(req); QB.init(APPLICATION_ID, AUTH_KEY, AUTH_SECRET, ACCOUNT_KEY); var params = { userId: parseInt(req.body.senderQBUserId), password: req.body.senderQBPassword, }; console.log(params); QB.createSession({ userId: parseInt(req.body.senderQBUserId), password: req.body.senderQBPassword, }, function (err, result1) { if (err) { console.log('Something went wrong: ' + JSON.stringify(err)); reject(err) } else { console.log("new session created---", JSON.stringify(result1)); QB.chat.connect({ userId: parseInt(req.body.senderQBUserId), password: req.body.senderQBPassword, }, async function (error, contactList) { if (error) { console.log('not connected to chat', error); reject(error) } else { console.log(error, 'connected to chat', contactList); var message = { body: "System_notification", extension: { param1: "value1", param2: "value2", }, }; var opponentId = Number(req.body.recieverQBuserId); try { message.id = QB.chat.sendSystemMessage(opponentId, message); console.log("Notification sent", message.id) QB.chat.disconnect(); //let destroy = await destroySession(req) resolve("notification sent") // or message.id = QB.chat.sendSystemMessage(opponentId, message) if message ID is needed } catch (e) { if (e.name === "ChatNotConnectedError") { console.log("not connected") reject(e) } } } }); } }); }); }

Instruction to run this- call sendNotification api with payload {senderQBUserId:xxxxxx, senderQBPassword: xxxxxx,opponentId:xxxxx} --> Call sendSystemNotification function which send the notification

[BertoGz]

Im also seeing "TypeError: Cannot read property 'querySelector' of null" after the opponent receives a system message. I have already configured quickblox correctly as instructed in the docs since I am able to confirm an active user session. Im able to create dialogs, send chats, use isTyping listener etc. The only thing failing at the moment is the onSystemMessageListener. On one occasion I was able to successfully get the handler to work correctly, but it wasnt related to my code. Im investigating more.