Fire event on track restart (#511)

* Fire event on track restart

* Add changeset

Author: davidliu

.changeset/happy-olives-lay.md

@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Track event for track restart

src/room/events.ts

@@ -427,6 +427,10 @@ export enum TrackEvent {
   Message = 'message',
   Muted = 'muted',
   Unmuted = 'unmuted',
+  /**
+   * Only fires on LocalTracks
+   */
+  Restarted = 'restarted',
   Ended = 'ended',
   Subscribed = 'subscribed',
   Unsubscribed = 'unsubscribed',

src/room/track/LocalTrack.ts

@@ -183,6 +183,7 @@ export default abstract class LocalTrack extends Track {
 
     this.mediaStream = mediaStream;
     this.constraints = constraints;
+    this.emit(TrackEvent.Restarted, this);
     return this;
   }
 

src/room/track/Track.ts

@@ -398,6 +398,7 @@ export type TrackEventCallbacks = {
   message: () => void;
   muted: (track?: any) => void;
   unmuted: (track?: any) => void;
+  restarted: (track?: any) => void;
   ended: (track?: any) => void;
   updateSettings: () => void;
   updateSubscription: () => void;