Only replace the participants list from the SFU event, ignore participants in the coordinator event

Author: sierpinskid

Packages/StreamVideo/Runtime/Core/Models/CallSession.cs

@@ -55,15 +55,17 @@ void IStateLoadableFrom<CallSessionResponseInternalDTO, CallSession>.LoadFromDto
             // CallSessionResponseInternalDTO usually (or always?) contains no participants. Participants are updated from the SFU join response
             // But SFU response can arrive before API response, so we can't override participants here because this clears the list
 
+            //StreamTODO: temp remove this. This seems to be only messing up the participants list. We're testing updating the participants only based on SFU data.
+            // But we need to check how this will work with GetCall where there's not SFU connection
 
-            foreach (var dtoParticipant in dto.Participants)
-            {
-                var participant = cache.TryCreateOrUpdate(dtoParticipant);
-                if (!_participants.Contains(participant))
-                {
-                    _participants.Add(participant);
-                }
-            }
+            // foreach (var dtoParticipant in dto.Participants)
+            // {
+            //     var participant = cache.TryCreateOrUpdate(dtoParticipant);
+            //     if (!_participants.Contains(participant))
+            //     {
+            //         _participants.Add(participant);
+            //     }
+            // }
 
             // StreamTODO: figure out how to best handle this. Should we update it from coordinator or only the SFU
             //_participantsCountByRole.TryReplaceValuesFromDto(dto.ParticipantsCountByRole);
@@ -82,6 +84,9 @@ void IStateLoadableFrom<SfuCallState, CallSession>.LoadFromDto(SfuCallState dto,
                 StartedAt = dto.StartedAt.ToDateTimeOffset();
             }
 
+            // Treat SFU as the most updated source of truth for participants
+            _participants.Clear();
+            
             // dto.CallState.Participants may not contain all participants
             foreach (var dtoParticipant in dto.Participants)
             {