From 87fbbb9a3f4410c9815733772fd52cae79f4fc8a Mon Sep 17 00:00:00 2001
From: Robin <robin@robin.town>
Date: Mon, 15 Dec 2025 15:16:47 -0500
Subject: [PATCH] Make MatrixRTC mode a required input to CallViewModel

---
 src/state/CallViewModel/CallViewModel.ts          | 11 ++++-------
 src/state/CallViewModel/CallViewModelTestUtils.ts | 11 +++++------
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/src/state/CallViewModel/CallViewModel.ts b/src/state/CallViewModel/CallViewModel.ts
index 9ebe025c..8f8b20cf 100644
--- a/src/state/CallViewModel/CallViewModel.ts
+++ b/src/state/CallViewModel/CallViewModel.ts
@@ -62,7 +62,6 @@ import {
 import {
   duplicateTiles,
   MatrixRTCMode,
-  matrixRTCMode as matrixRTCModeSetting,
   playReactionsSound,
   showReactions,
 } from "../../settings/settings";
@@ -156,8 +155,8 @@ export interface CallViewModelOptions {
   connectionState$?: Behavior<ConnectionState>;
   /** Optional behavior overriding the computed window size, mainly for testing purposes. */
   windowSize$?: Behavior<{ width: number; height: number }>;
-  /** Optional behavior overriding the MatrixRTC mode, mainly for testing purposes. */
-  matrixRTCMode$?: Behavior<MatrixRTCMode>;
+  /** The version & compatibility mode of MatrixRTC that we should use. */
+  matrixRTCMode$: Behavior<MatrixRTCMode>;
 }
 
 // Do not play any sounds if the participant count has exceeded this
@@ -408,15 +407,13 @@ export function createCallViewModel$(
     memberships$,
   );
 
-  const matrixRTCMode$ = options.matrixRTCMode$ ?? matrixRTCModeSetting.value$;
-
   const localTransport$ = createLocalTransport$({
     scope: scope,
     memberships$: memberships$,
     client,
     roomId: matrixRoom.roomId,
     useOldestMember$: scope.behavior(
-      matrixRTCMode$.pipe(map((v) => v === MatrixRTCMode.Legacy)),
+      options.matrixRTCMode$.pipe(map((v) => v === MatrixRTCMode.Legacy)),
     ),
   });
 
@@ -468,7 +465,7 @@ export function createCallViewModel$(
   });
 
   const connectOptions$ = scope.behavior(
-    matrixRTCMode$.pipe(
+    options.matrixRTCMode$.pipe(
       map((mode) => ({
         encryptMedia: livekitKeyProvider !== undefined,
         // TODO. This might need to get called again on each change of matrixRTCMode...
diff --git a/src/state/CallViewModel/CallViewModelTestUtils.ts b/src/state/CallViewModel/CallViewModelTestUtils.ts
index 377c6771..b6f53275 100644
--- a/src/state/CallViewModel/CallViewModelTestUtils.ts
+++ b/src/state/CallViewModel/CallViewModelTestUtils.ts
@@ -102,11 +102,7 @@ export function withCallViewModel(mode: MatrixRTCMode) {
       },
       setSyncState: (value: SyncState) => void,
     ) => void,
-    options: CallViewModelOptions = {
-      encryptionSystem: { kind: E2eeType.PER_PARTICIPANT },
-      autoLeaveWhenOthersLeft: false,
-      matrixRTCMode$: constant(mode),
-    },
+    options: Partial<CallViewModelOptions> = {},
   ): void => {
     let syncState = initialSyncState;
     const setSyncState = (value: SyncState): void => {
@@ -176,7 +172,8 @@ export function withCallViewModel(mode: MatrixRTCMode) {
       mediaDevices,
       muteStates,
       {
-        ...options,
+        encryptionSystem: { kind: E2eeType.PER_PARTICIPANT },
+        autoLeaveWhenOthersLeft: false,
         livekitRoomFactory: (): LivekitRoom =>
           mockLivekitRoom({
             localParticipant,
@@ -185,6 +182,8 @@ export function withCallViewModel(mode: MatrixRTCMode) {
           }),
         connectionState$,
         windowSize$,
+        matrixRTCMode$: constant(mode),
+        ...options,
       },
       raisedHands$,
       reactions$,