Twilio chat member online status is always null - twilio

Question

In my chat application I want to know if a channel member is online, but 'userInfoUpdated' never fires when a new member comes and member.userInfo.online is always null whenever I want to get it. What am I doing wrong?
UPD:
Here the code is paused on member "updated" even, the member's userInfo.online field is still null
UPD2:
Now I've found this line from the documentaion
Extended user information Note that UserInfo#online and UserInfo#notifiable properties are eligible to use only if reachability function enabled. You may check if it is enabled by reading value of Client~reachabilityEnabled docs
Finally setting reachabilityEnabled on the backend solved my problem

Answer 1

setting reachabilityEnabled on the backend solved my problem

Answer 2

Twilio developer evangelist here.
From your comment you say that your code is:
client.getChannelByUniqueName(uniqueName).then(channel => {
channel.getMembers().forEach(member => {
member.on('userInfoUpdated', ()=>{ //nothing happening })
})
})
I think I see the issue. channel.getMembers() returns a Promise that will asynchronously resolve with an array of Member objects. You're just calling forEach on the Promise itself. Try something like:
client.getChannelByUniqueName(uniqueName).then(channel => {
return channel.getMembers()
}).then(members => {
members.forEach(member => {
member.on('userInfoUpdated', ()=>{ // something happening? })
})
})
Let me know if that helps at all.

Answer 3

Yes, members will be null if you didn't synchronized chat client at client startup.
So you need to override this callback and make sure that client synchronization is completed before using chat client methods -like getChannels or getMessages-.
override fun onClientSynchronization(status: ChatClient.SynchronizationStatus?) {
if (status == ChatClient.SynchronizationStatus.COMPLETED) {
// You can use chat client now
}
}
You will receive an event to the client's listener or delegate via the synchronizationStatusUpdated method with a value of StatusCompleted. This is your indication the client is ready for business, and all User Channels have been obtained and subscribed to.
For more details please check this: Initializing SDK Clients