Channel's subscriptions to onMessageAdded and onMessageDeleted not called on iOS

[hugomc92]

It's working fine on Android but on Android it doesn't call the flutter implementation when listen to them

Version 1.1.7+9

Example:

channel.onMessageAdded?.listen((message) async {
        console.log('_generateConversation channel.onMessageAdded', channel.sid);

        // Not being called on iOS
}),

channel.onMessageDeleted?.listen((message) async {
        console.log('_generateConversation channel.onMessageDeleted', channel.sid);

        // Not being called on iOS
}),

[asmodeoux]

Should be solved in a 2.0.1 quickfix, closing

[hugomc92]

Hello @asmodeoux

It's not completely fixed yet.

Now it's being called sometimes and others no, same code, same circumstances, so I can't know why sometimes the listeners are being called and others not.

Thanks in advance for your review

[martintrollip]

@hugomc92, you can try to add this and listen for the channel to be synchronized on IOS

/// Listen to Twilio client synchronization events
client.onClientSynchronization?.listen((status) {
      if (_isSynced(status)) {
           /// subscribe to channel.onMessageAdded and channel.onMessageDeleted
      }
}

bool _isSynced(ChatClientSynchronizationStatus status) {
    return status == ChatClientSynchronizationStatus.CONVERSATIONS_COMPLETED ||
        (status == ChatClientSynchronizationStatus.COMPLETED && client.channelsInitialized());
}

[hugomc92]

Hello @martintrollip

I'm going to give it a try and I'll subscribe to the listeners after the client synchronization are completed.

However, the client.channelsInitialized is not defined in ChatClient and I didn't found anything similar to it into that class:

Thanks in advance for your answer!

EDIT: I've tried with this function to ensure the client is initialized:

bool _isClientSynced(ChatClientSynchronizationStatus? status) {
    return status == ChatClientSynchronizationStatus.CONVERSATIONS_COMPLETED;
}

But when I print the ChatClientSynchronizationStatus current status it always is ChatClientSynchronizationStatus.COMPLETED and don't change to ChatClientSynchronizationStatus.CONVERSATIONS_COMPLETED never

[martintrollip]

For the channelsInitialized you can check that the client channels is not null.

client?.channels != null

From the example code, it looks like Android and IOS handles initialization slightly differently,

See the example in subscriptions_middleware.dart:

store.state.chatClient?.onClientSynchronization?.listen((event) async {
        // in Android there is a separate event to identify when fully initialized
        // in iOS we do check manually
        if (event == ChatClientSynchronizationStatus.CONVERSATIONS_COMPLETED ||
            (event == ChatClientSynchronizationStatus.COMPLETED &&
                store.state.chatClient?.channels != null)) {
                    ....
        }

[hugomc92]

Hello @martintrollip

Thanks for your reply. I was actually checking the channels was not null before subscribing.

Anyways I tried your full solution and the problem still persists. There’re sometimes the listeners are being fired and other not on iOS. On Android it works perfect.

Thanks for your replies

[martintrollip]

Hi @hugomc92,

We only used this during initialisation:

1. final client = await TwilioConversationsClient.create(token, Properties());
2. client?.onClientSynchronization?.listen(....) (as above)

Any other checks and listeners on channels / messages will only happen once the client sent the synchronisation status.

Other than this I'm not sure how to reproduce the issue for further investigations

[jullicer]

Any update to this bug? i have issue with the LAST_CONSUMED_MESSAGE_INDEX either from channel or member update.

The logs are shown from console but my listener callback isn't called. But on the onMessageAdded it is working fine.

` twilioSub.add(client!.onChannelUpdated!.listen((channelUpdate) {
print("LAST_CONSUMED_MESSAGE_INDEX $channelUpdate");

    /// check if reason is LAST_CONSUMED_MESSAGE_INDEX
    if (channelUpdate.reason == ChannelUpdateReason.LAST_CONSUMED_MESSAGE_INDEX) {
      onLastMessageIndexChanged(channelUpdate.channel.lastMessageIndex!);
    }
  }));`

ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX D/TwilioInfo(14167): ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX D/TwilioInfo(14167): ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX D/TwilioInfo(14167): ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX D/TwilioInfo(14167): ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX D/TwilioInfo(14167): ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX D/TwilioInfo(14167): ChannelListener.onMemberUpdated => memberSid = MBd47ae420b5764ab4b7581a54ceb880ee, reason = LAST_READ_MESSAGE_INDEX