export function processExternalDeviceRequest()

in react/features/device-selection/functions.js [90:220]
115 lines of code
20 McCabe index (conditional complexity)

export function processExternalDeviceRequest( // eslint-disable-line max-params
        dispatch: Dispatch<any>,
        getState: Function,
        request: Object,
        responseCallback: Function) {
    if (request.type !== 'devices') {
        return false;
    }
    const state = getState();
    const settings = state['features/base/settings'];
    let result = true;

    switch (request.name) {
    case 'isDeviceListAvailable':
        responseCallback(JitsiMeetJS.mediaDevices.isDeviceListAvailable());
        break;
    case 'isDeviceChangeAvailable':
        responseCallback(
            JitsiMeetJS.mediaDevices.isDeviceChangeAvailable(
                request.deviceType));
        break;
    case 'isMultipleAudioInputSupported':
        responseCallback(JitsiMeetJS.isMultipleAudioInputSupported());
        break;
    case 'getCurrentDevices':
        dispatch(getAvailableDevices()).then(devices => {
            if (areDeviceLabelsInitialized(state)) {
                const deviceDescriptions = {
                    audioInput: undefined,
                    audioOutput: undefined,
                    videoInput: undefined
                };
                const currentlyUsedDeviceIds = new Set([
                    getAudioOutputDeviceId(),
                    settings.micDeviceId,
                    settings.cameraDeviceId
                ]);

                devices.forEach(device => {
                    const { deviceId, kind } = device;

                    if (currentlyUsedDeviceIds.has(deviceId)) {
                        switch (kind) {
                        case 'audioinput':
                            deviceDescriptions.audioInput = device;
                            break;
                        case 'audiooutput':
                            deviceDescriptions.audioOutput = device;
                            break;
                        case 'videoinput':
                            deviceDescriptions.videoInput = device;
                            break;
                        }
                    }
                });

                responseCallback(deviceDescriptions);
            } else {
                // The labels are not available if the A/V permissions are
                // not yet granted.
                dispatch(addPendingDeviceRequest({
                    type: 'devices',
                    name: 'getCurrentDevices',
                    responseCallback
                }));
            }
        });

        break;
    case 'getAvailableDevices':
        dispatch(getAvailableDevices()).then(devices => {
            if (areDeviceLabelsInitialized(state)) {
                responseCallback(groupDevicesByKind(devices));
            } else {
                // The labels are not available if the A/V permissions are
                // not yet granted.
                dispatch(addPendingDeviceRequest({
                    type: 'devices',
                    name: 'getAvailableDevices',
                    responseCallback
                }));
            }
        });

        break;
    case 'setDevice': {
        const { device } = request;

        if (!areDeviceLabelsInitialized(state)) {
            dispatch(addPendingDeviceRequest({
                type: 'devices',
                name: 'setDevice',
                device,
                responseCallback
            }));

            return true;
        }

        const { label, id } = device;
        const deviceId = label
            ? getDeviceIdByLabel(state, device.label, device.kind)
            : id;

        if (deviceId) {
            switch (device.kind) {
            case 'audioinput':
                dispatch(setAudioInputDeviceAndUpdateSettings(deviceId));
                break;
            case 'audiooutput':
                dispatch(setAudioOutputDevice(deviceId));
                break;
            case 'videoinput':
                dispatch(setVideoInputDeviceAndUpdateSettings(deviceId));
                break;
            default:
                result = false;
            }
        } else {
            result = false;
        }

        responseCallback(result);
        break;
    }
    default:
        return false;
    }

    return true;
}