element-web-Github/src/UnknownDeviceErrorHandler.js

import dis from './dispatcher';
import sdk from './index';
import Modal from './Modal';

const onAction = function(payload) {
    if (payload.action === 'unknown_device_error') {
        var UnknownDeviceDialog = sdk.getComponent("dialogs.UnknownDeviceDialog");
        Modal.createDialog(UnknownDeviceDialog, {
            devices: payload.err.devices,
            room: payload.room,
            onFinished: (r) => {
                // XXX: temporary logging to try to diagnose
                // https://github.com/vector-im/riot-web/issues/3148
                console.log('UnknownDeviceDialog closed with '+r);
            },
        }, "mx_Dialog_unknownDevice");
    }
}

let ref = null;

module.exports = {
    startListening: function () {
        ref = dis.register(onAction);
    },
    stopListening: function () {
        if (ref){
            dis.unregister(ref);
            ref = null;
        }
    },
};