correctly send participant updates

cmd/cli/client/client.go

@@ -184,6 +184,7 @@ func (c *RTCClient) Run() error {
 		case *livekit.SignalResponse_Join:
 			c.AppendLog("join accepted, sending offer..")
 			c.localParticipant = msg.Join.Participant
+			c.AppendLog("other participants", "count", len(msg.Join.OtherParticipants))
 
 			// Create an offer to send to the other process
 			offer, err := c.PeerConn.CreateOffer(nil)
@@ -240,6 +241,10 @@ func (c *RTCClient) Run() error {
 			if err := c.PeerConn.AddICECandidate(*candidateInit); err != nil {
 				return err
 			}
+		case *livekit.SignalResponse_Update:
+			for _, p := range msg.Update.Participants {
+				c.AppendLog("participant update", "id", p.Id, "state", p.State.String())
+			}
 		}
 	}
 

pkg/rtc/participant.go

@@ -119,10 +119,12 @@ func (p *Participant) State() livekit.ParticipantInfo_State {
 }
 
 func (p *Participant) ToProto() *livekit.ParticipantInfo {
-	return &livekit.ParticipantInfo{
-		Id:   p.id,
-		Name: p.name,
+	info := &livekit.ParticipantInfo{
+		Id:    p.id,
+		Name:  p.name,
+		State: p.state,
 	}
+	return info
 }
 
 // Answer an offer from remote participant
@@ -280,6 +282,7 @@ func (p *Participant) updateState(state livekit.ParticipantInfo_State) {
 	}
 	oldState := p.state
 	p.state = state
+
 	if p.OnStateChange != nil {
 		go func() {
 			p.OnStateChange(p, oldState)

pkg/rtc/room.go

@@ -60,13 +60,16 @@ func (r *Room) Join(participant *Participant) error {
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
-	participant.OnPeerTrack = r.onTrackAdded
+	log := logger.GetLogger()
 
+	// it's important to set this before connection, we don't want to miss out on any tracks
+	participant.OnPeerTrack = r.onTrackAdded
 	participant.OnStateChange = func(p *Participant, oldState livekit.ParticipantInfo_State) {
+		log.Debugw("participant state changed", "state", p.state, "participant", p.id)
 		r.broadcastParticipantState(p)
 	}
 
-	logger.GetLogger().Infow("new participant joined",
+	log.Infow("new participant joined",
 		"id", participant.ID(),
 		"name", participant.Name(),
 		"roomId", r.Id)
@@ -137,7 +140,7 @@ func (r *Room) broadcastParticipantState(p *Participant) {
 			continue
 		}
 
-		err := p.SendParticipantUpdate(updates)
+		err := op.SendParticipantUpdate(updates)
 		if err != nil {
 			logger.GetLogger().Errorw("could not send update to participant",
 				"participant", p.id,

pkg/utils/id.go

@@ -5,9 +5,9 @@ import (
 )
 
 const (
-	RoomPrefix        = "R-"
-	NodePrefix        = "N-"
-	ParticipantPrefix = "P-"
+	RoomPrefix        = "RM_"
+	NodePrefix        = "ND_"
+	ParticipantPrefix = "PA_"
 )
 
 func NewGuid(prefix string) string {