feat(e2ee): adds sounds for e2ee enabling/disabling

react/features/e2ee/constants.js

+// @flow
+
+/**
+ * The identifier of the sound to be played when e2ee is disabled.
+ *
+ * @type {string}
+ */
+export const E2EE_OFF_SOUND_ID = 'E2EE_OFF_SOUND';
+
+/**
+ * The identifier of the sound to be played when e2ee is enabled.
+ *
+ * @type {string}
+ */
+export const E2EE_ON_SOUND_ID = 'E2EE_ON_SOUND';

react/features/e2ee/middleware.js

 // @flow
 
+import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../base/app';
 import { getCurrentConference } from '../base/conference';
 import { getLocalParticipant, participantUpdated } from '../base/participants';
 import { MiddlewareRegistry, StateListenerRegistry } from '../base/redux';
+import { playSound, registerSound, unregisterSound } from '../base/sounds';
 
 import { TOGGLE_E2EE } from './actionTypes';
 import { toggleE2EE } from './actions';
+import { E2EE_OFF_SOUND_ID, E2EE_ON_SOUND_ID } from './constants';
 import logger from './logger';
+import { E2EE_OFF_SOUND_FILE, E2EE_ON_SOUND_FILE } from './sounds';
 
 /**
  * Middleware that captures actions related to E2EE.
  */
 MiddlewareRegistry.register(({ dispatch, getState }) => next => action => {
     switch (action.type) {
+    case APP_WILL_MOUNT:
+        dispatch(registerSound(
+            E2EE_OFF_SOUND_ID,
+            E2EE_OFF_SOUND_FILE));
+
+        dispatch(registerSound(
+            E2EE_ON_SOUND_ID,
+            E2EE_ON_SOUND_FILE));
+        break;
+
+    case APP_WILL_UNMOUNT:
+        dispatch(unregisterSound(E2EE_OFF_SOUND_ID));
+        dispatch(unregisterSound(E2EE_ON_SOUND_ID));
+        break;
+
     case TOGGLE_E2EE: {
         const conference = getCurrentConference(getState);
 
                 id: participant.id,
                 local: true
             }));
+
+            const soundID = action.enabled ? E2EE_ON_SOUND_ID : E2EE_OFF_SOUND_ID;
+
+            dispatch(playSound(soundID));
         }
 
         break;

react/features/e2ee/sounds.js

+// @flow
+
+/**
+ * The name of the bundled audio file which will be played when e2ee is disabled.
+ *
+ * @type {string}
+ */
+export const E2EE_OFF_SOUND_FILE = 'e2eeOff.mp3';
+
+/**
+ * The name of the bundled audio file which will be played when e2ee is enabled.
+ *
+ * @type {string}
+ */
+export const E2EE_ON_SOUND_FILE = 'e2eeOn.mp3';