jiti-meet/react/features/mobile/background/reducer.js

import { ReducerRegistry } from '../../base/redux';

import {
    _SET_APP_STATE_LISTENER,
    APP_STATE_CHANGED
} from './actionTypes';

const INITIAL_STATE = {
    appState: 'active'
};

ReducerRegistry.register(
    'features/background',
    (state = INITIAL_STATE, action) => {
        switch (action.type) {
        case _SET_APP_STATE_LISTENER:
            return {
                ...state,
                appStateListener: action.listener
            };

        case APP_STATE_CHANGED:
            return {
                ...state,
                appState: action.appState
            };
        }

        return state;
    });