From e4e3dd225b7e27653023b6d33f552f98f316eacb Mon Sep 17 00:00:00 2001
From: Hiroshi Horie <548776+hiroshihorie@users.noreply.github.com>
Date: Sun, 9 Jul 2023 02:39:26 +0800
Subject: [PATCH] notify parent object when child state mutates

---
 Sources/LiveKit/Core/Room.swift                          | 1 +
 Sources/LiveKit/Participant/Participant.swift            | 5 ++++-
 Sources/LiveKit/TrackPublications/TrackPublication.swift | 9 +++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/Sources/LiveKit/Core/Room.swift b/Sources/LiveKit/Core/Room.swift
index dd01e4d51..e4ccece45 100644
--- a/Sources/LiveKit/Core/Room.swift
+++ b/Sources/LiveKit/Core/Room.swift
@@ -185,6 +185,7 @@ public class Room: NSObject, ObservableObject, Loggable {
                 }
             }
 
+            // Notify Room when state mutates
             Task.detached { @MainActor in
                 self.objectWillChange.send()
             }
diff --git a/Sources/LiveKit/Participant/Participant.swift b/Sources/LiveKit/Participant/Participant.swift
index fde16b9a1..36f2c654d 100644
--- a/Sources/LiveKit/Participant/Participant.swift
+++ b/Sources/LiveKit/Participant/Participant.swift
@@ -151,9 +151,12 @@ public class Participant: NSObject, ObservableObject, Loggable {
                 }
             }
 
-            // notify object change when any state updates
+            // Notify when state mutates
             Task.detached { @MainActor in
+                // Notify Participant
                 self.objectWillChange.send()
+                // Notify Room
+                self.room.objectWillChange.send()
             }
         }
     }
diff --git a/Sources/LiveKit/TrackPublications/TrackPublication.swift b/Sources/LiveKit/TrackPublications/TrackPublication.swift
index ba666a71e..c4aa1fde7 100644
--- a/Sources/LiveKit/TrackPublications/TrackPublication.swift
+++ b/Sources/LiveKit/TrackPublications/TrackPublication.swift
@@ -131,8 +131,17 @@ public class TrackPublication: NSObject, ObservableObject, TrackDelegate, Loggab
                 }
             }
 
+            // Notify when state mutates
             Task.detached { @MainActor in
+                // Notify TrackPublication
                 self.objectWillChange.send()
+
+                if let participant = self.participant {
+                    // Notify Participant
+                    participant.objectWillChange.send()
+                    // Notify Room
+                    participant.room.objectWillChange.send()
+                }
             }
         }
     }