jitsi_mod/react/features/external-api/middleware.js

// @flow

import { NOTIFY_CAMERA_ERROR, NOTIFY_MIC_ERROR } from '../base/devices';
import { MiddlewareRegistry } from '../base/redux';

declare var APP: Object;

/**
 * The middleware of the feature {@code external-api}.
 *
 * @returns {Function}
 */
MiddlewareRegistry.register((/* store */) => next => action => {
    switch (action.type) {
    case NOTIFY_CAMERA_ERROR:
        if (action.error) {
            APP.API.notifyOnCameraError(
              action.error.name, action.error.message);
        }
        break;

    case NOTIFY_MIC_ERROR:
        if (action.error) {
            APP.API.notifyOnMicError(action.error.name, action.error.message);
        }
        break;
    }

    return next(action);
});