EventChannel emit not working

[wol]

This code worked perfectly fine before, but somehow stopped working recently

function* initRoomListener(event) {
    const {roomId} = event;
    const auth = yield select(getAuth);
    const roomChannel = createRoomChannel(roomId, auth.userId);
    while (true) {
        const messages = yield take(roomChannel);
        yield put(ChatActions.updateMessages(messages));
    }
}

function createRoomChannel(roomId, userId) {
    const listener = eventChannel((emit) => {
        database()
            .ref(`/rooms/${roomId}/${userId}`)
            .limitToLast(1)
            .on('value', (snapshot) => emit(processMessages(snapshot, roomId)));

        return () => database().ref(`/rooms/${roomId}/${userId}`).off(listener);
    });

    return listener;
}

function processMessages(snapshot, roomId) {
    const messages = [];
    snapshot?.forEach((child) => {
        messages.push({
            roomId,
            id: child.key,
        });
    });
    return messages;
}

I see that only problematic part is emit(processMessages(snapshot, roomId)));. before this everything can be logged

[Eric Bower]

Hi! I'm going to need a little more information to help you debug. Are you certain the database().on('value') callback is being called?

Next, are you certain initRoomListener is getting passed into your root saga? Are you able to add logs before createRoomChannel and they are getting triggered?

[wol]

Yeah, everything works perfectly fine, but emit is failing. I can see logs before emit and after emit too. I am not saying that emit is failing, but the fact is it does not trigger this part const messages = yield take(roomChannel); somehow

• firebase callback is executed always
• listeners are started definitely

[wol]

could be there any chance, that emitting event from another library (https://github.com/meinto/react-native-event-listeners) could cause saga emit to fail?

[Eric Bower]

Can you show me the root saga where initRoomListener is being registered?

[Eric Bower]

Circling back, did you resolve this issue?

[Eric Bower]

Closing for now. Please feel free to reply and I'll reopen and continue to help! Thanks!