110 lines
2.9 KiB
JavaScript
110 lines
2.9 KiB
JavaScript
/* @flow */
|
|
|
|
import { AppState } from 'react-native';
|
|
import type { Dispatch } from 'redux';
|
|
|
|
import {
|
|
APP_WILL_MOUNT,
|
|
APP_WILL_UNMOUNT
|
|
} from '../../app';
|
|
import { MiddlewareRegistry } from '../../base/redux';
|
|
|
|
import {
|
|
_setAppStateListener,
|
|
_setBackgroundVideoMuted,
|
|
appStateChanged
|
|
} from './actions';
|
|
import {
|
|
_SET_APP_STATE_LISTENER,
|
|
APP_STATE_CHANGED
|
|
} from './actionTypes';
|
|
|
|
/**
|
|
* Middleware that captures App lifetime actions and subscribes to application
|
|
* state changes. When the application state changes it will fire the action
|
|
* required to mute or unmute the local video in case the application goes to
|
|
* the background or comes back from it.
|
|
*
|
|
* @param {Store} store - Redux store.
|
|
* @returns {Function}
|
|
* @see {@link https://facebook.github.io/react-native/docs/appstate.html}
|
|
*/
|
|
MiddlewareRegistry.register(store => next => action => {
|
|
switch (action.type) {
|
|
case _SET_APP_STATE_LISTENER: {
|
|
// Remove the current/old AppState listener.
|
|
const { appStateListener } = store.getState()['features/background'];
|
|
|
|
if (appStateListener) {
|
|
AppState.removeEventListener('change', appStateListener);
|
|
}
|
|
|
|
// Add the new AppState listener.
|
|
if (action.listener) {
|
|
AppState.addEventListener('change', action.listener);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case APP_STATE_CHANGED:
|
|
_appStateChanged(store.dispatch, action.appState);
|
|
break;
|
|
|
|
case APP_WILL_MOUNT:
|
|
store.dispatch(
|
|
_setAppStateListener(
|
|
_onAppStateChange.bind(undefined, store.dispatch)));
|
|
break;
|
|
|
|
case APP_WILL_UNMOUNT:
|
|
store.dispatch(_setAppStateListener(null));
|
|
break;
|
|
}
|
|
|
|
return next(action);
|
|
});
|
|
|
|
/**
|
|
* Handles app state changes. Dispatches the necessary Redux actions for the
|
|
* local video to be muted when the app goes to the background, and to be
|
|
* unmuted when the app comes back.
|
|
*
|
|
* @param {Dispatch} dispatch - Redux dispatch function.
|
|
* @param {string} appState - The current app state.
|
|
* @private
|
|
* @returns {void}
|
|
*/
|
|
function _appStateChanged(dispatch: Dispatch<*>, appState: string) {
|
|
let muted;
|
|
|
|
switch (appState) {
|
|
case 'active':
|
|
muted = false;
|
|
break;
|
|
|
|
case 'background':
|
|
muted = true;
|
|
break;
|
|
|
|
case 'inactive':
|
|
default:
|
|
// XXX: We purposely don't handle the 'inactive' app state.
|
|
return;
|
|
}
|
|
|
|
dispatch(_setBackgroundVideoMuted(muted));
|
|
}
|
|
|
|
/**
|
|
* Called by React Native's AppState API to notify that the application state
|
|
* has changed. Dispatches the change within the (associated) Redux store.
|
|
*
|
|
* @param {Dispatch} dispatch - Redux dispatch function.
|
|
* @param {string} appState - The current application execution state.
|
|
* @private
|
|
* @returns {void}
|
|
*/
|
|
function _onAppStateChange(dispatch: Dispatch<*>, appState: string) {
|
|
dispatch(appStateChanged(appState));
|
|
}
|