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const publishStreams = async function (state) {
    if (state.isConnected()) {
        //create local display item to show local streams
        const display = initLocalDisplay(document.getElementById("localVideo"));
        state.setDisplay(display);
        try {
            //get configured local video streams
            let streams = await getVideoStreams(mainConfig);
            let audioStreams = await getAudioStreams(mainConfig);
            if (state.isConnected() && state.isActive()) {
                //combine local video streams with audio streams
                streams.push.apply(streams, audioStreams);
                let config = {};
                //add our local streams to the room (to PeerConnection)
                streams.forEach(function (s) {
                    let contentType = s.type || s.source;
                    //add local stream to local display
                    display.add(s.stream.id, $("#" + state.inputId()).val(), s.stream, contentType);
                    //add each track to PeerConnection
                    s.stream.getTracks().forEach((track) => {
                        config[track.id] = contentType;
                        addTrackToPeerConnection(state.pc, s.stream, track, s.encodings);
                        subscribeTrackToEndedEvent(state.room, track, state.pc);
                    });
                });
                //start WebRTC negotiation
                await state.room.join(state.pc, null, config);
            }
        } catch (e) {
            if (e.type === constants.SFU_ROOM_EVENT.OPERATION_FAILED) {
                onOperationFailed(state, e);
            } else {
                console.error("Failed to capture streams: " + e);
                setStatus(state.errInfoId(), e.name, "red");
                onStopClick(state);
            }
        }
    }
}

const playStreams = async function (state) {
    if (state.isConnected() && state.isActive()) {
        try {
            //create remote display item to show remote streams
            const display = initDefaultRemoteDisplay(state.room, document.getElementById("remoteVideo"), null, null);
            state.setDisplay(display);
            //start WebRTC negotiation
            await state.room.join(state.pc, null, null, 1);
        } catch (e) {
            if (e.type === constants.SFU_ROOM_EVENT.OPERATION_FAILED) {
                onOperationFailed(state, e);
            } else {
                console.error("Failed to play streams: " + e);
                setStatus(state.errInfoId(), e.name, "red");
                onStopClick(state);
            }
        }
    }
}