set position in session.

internal/session/session.go

@@ -16,6 +16,10 @@ type SessionCtx struct {
 	profile types.MemberProfile
 	state   types.SessionState
 
+	positionX  int
+	positionY  int
+	positionMu sync.Mutex
+
 	websocketPeer types.WebSocketPeer
 	websocketMu   sync.Mutex
 
@@ -53,6 +57,18 @@ func (session *SessionCtx) IsHost() bool {
 	return session.manager.GetHost() == session
 }
 
+// ---
+// cursor position
+// ---
+
+func (session *SessionCtx) SetPosition(x, y int) {
+	session.positionMu.Lock()
+	defer session.positionMu.Unlock()
+
+	session.positionX = x
+	session.positionY = y
+}
+
 // ---
 // websocket
 // ---

internal/types/session.go

@@ -23,6 +23,9 @@ type Session interface {
 	State() SessionState
 	IsHost() bool
 
+	// cursor position
+	SetPosition(x, y int)
+
 	// websocket
 	SetWebSocketPeer(websocketPeer WebSocketPeer)
 	SetWebSocketConnected(websocketPeer WebSocketPeer, connected bool)

internal/webrtc/handler.go

@@ -34,15 +34,36 @@ func (manager *WebRTCManagerCtx) handle(data []byte, session types.Session) erro
 
 	buffer = bytes.NewBuffer(data)
 
-	switch header.Event {
-	case payload.OP_MOVE:
+	// handle cursor move event
+	if header.Event == payload.OP_MOVE {
 		payload := &payload.Move{}
 		if err := binary.Read(buffer, binary.BigEndian, payload); err != nil {
 			return err
 		}
 
-		manager.desktop.Move(int(payload.X), int(payload.Y))
-		manager.curPosition.Set(int(payload.X), int(payload.Y))
+		x, y := int(payload.X), int(payload.Y)
+
+		// handle active cursor movement
+		if session.IsHost() {
+			manager.desktop.Move(x, y)
+			manager.curPosition.Set(x, y)
+			return nil
+		}
+
+		// handle inactive cursor movement
+		if session.Profile().CanHost {
+			session.SetPosition(x, y)
+		}
+
+		return nil
+	}
+
+	// continue only if session is host
+	if !session.IsHost() {
+		return nil
+	}
+
+	switch header.Event {
 	case payload.OP_SCROLL:
 		payload := &payload.Scroll{}
 		if err := binary.Read(buffer, binary.BigEndian, payload); err != nil {

internal/webrtc/manager.go

@@ -208,10 +208,6 @@ func (manager *WebRTCManagerCtx) CreatePeer(session types.Session, videoID strin
 	})
 
 	dataChannel.OnMessage(func(message webrtc.DataChannelMessage) {
-		if !session.IsHost() {
-			return
-		}
-
 		if err := manager.handle(message.Data, session); err != nil {
 			logger.Err(err).Msg("data handle failed")
 		}