From 62c3254b6ba165817afa84bfbce02c7c1c7d1c04 Mon Sep 17 00:00:00 2001
From: Santhosh Vaiyapuri <santhoshvai@gmail.com>
Date: Thu, 31 Aug 2023 10:39:56 +0200
Subject: [PATCH] chore(react-native): document about why we do media stream
 cleanup

---
 .../src/hooks/internal/useCallMediaStreamCleanup.ts       | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/packages/react-native-sdk/src/hooks/internal/useCallMediaStreamCleanup.ts b/packages/react-native-sdk/src/hooks/internal/useCallMediaStreamCleanup.ts
index 8a9066e971..ee22ea26a0 100644
--- a/packages/react-native-sdk/src/hooks/internal/useCallMediaStreamCleanup.ts
+++ b/packages/react-native-sdk/src/hooks/internal/useCallMediaStreamCleanup.ts
@@ -5,6 +5,7 @@ import { useEffect, useRef } from 'react';
 
 /**
  * This hook is meant to be used in Lobby view or equivalent.
+ * It will cleanup the media stream on unmount if call is not meant to be joined.
  */
 export const useCallMediaStreamCleanup = () => {
   const call = useCall();
@@ -14,16 +15,17 @@ export const useCallMediaStreamCleanup = () => {
 
   useEffect(() => {
     return () => {
+      const mediaStream = callRef.current?.camera.state.mediaStream as
+        | MediaStream
+        | undefined;
       if (
+        mediaStream &&
         !(
           callRef.current?.state.callingState === CallingState.JOINED ||
           callRef.current?.state.callingState === CallingState.JOINING
         )
       ) {
         // we cleanup media stream only if call is not joined or joining
-        const mediaStream = callRef.current?.camera.state.mediaStream as
-          | MediaStream
-          | undefined;
         disposeOfMediaStream(mediaStream);
       }
     };