refactor: make voip.calls and voip.groupCalls simpler

lib/src/voip/call_session.dart

@@ -44,6 +44,7 @@ class CallSession {
   String? get groupCallId => opts.groupCallId;
   String get callId => opts.callId;
   String get localPartyId => opts.localPartyId;
+  VoipId get voipId => VoipId(roomId: room.id, callId: callId);
 
   CallDirection get direction => opts.dir;
 
@@ -216,8 +217,9 @@ class CallSession {
       final prevCallId = voip.incomingCallRoomId[room.id];
       if (prevCallId != null) {
         // This is probably an outbound call, but we already have a incoming invite, so let's terminate it.
-        final prevCall =
-            voip.calls[VoipId(roomId: room.id, callId: prevCallId)];
+        final prevCall = voip.calls.singleWhereOrNull((element) =>
+            element.room.id == room.id && element.callId == prevCallId);
+
         if (prevCall != null) {
           if (prevCall._inviteOrAnswerSent) {
             Logs().d('[glare] invite or answer sent, lex compare now');
@@ -975,7 +977,7 @@ class CallSession {
       voip.incomingCallRoomId.removeWhere((key, value) => value == callId);
     }
 
-    voip.calls.removeWhere((key, value) => key.callId == callId);
+    voip.calls.remove(this);
 
     await cleanUp();
     if (shouldEmit) {

lib/src/voip/group_call_session.dart

@@ -32,6 +32,13 @@ class GroupCallSession {
   final Client client;
   final VoIP voip;
   final Room room;
+  VoipId get voipId => VoipId(
+        roomId: room.id,
+        callId: groupCallId,
+        callBackendType: backend.type,
+        application: application,
+        scope: scope,
+      );
 
   /// is a list of backend to allow passing multiple backend in the future
   /// we use the first backend everywhere as of now
@@ -131,7 +138,13 @@ class GroupCallSession {
 
     await backend.setupP2PCallsWithExistingMembers(this);
 
-    voip.currentGroupCID = VoipId(roomId: room.id, callId: groupCallId);
+    voip.currentGroupCID = VoipId(
+      roomId: room.id,
+      callId: groupCallId,
+      callBackendType: backend.type,
+      application: application,
+      scope: scope,
+    );
 
     await voip.delegate.handleNewGroupCall(this);
   }
@@ -142,7 +155,7 @@ class GroupCallSession {
     setState(GroupCallState.localCallFeedUninitialized);
     voip.currentGroupCID = null;
     _participants.clear();
-    voip.groupCalls.remove(VoipId(roomId: room.id, callId: groupCallId));
+    voip.groupCalls.remove(this);
     await voip.delegate.handleGroupCallEnded(this);
     _resendMemberStateEventTimer?.cancel();
     setState(GroupCallState.ended);

lib/src/voip/models/voip_id.dart

@@ -1,24 +1,33 @@
 class VoipId {
   final String roomId;
   final String callId;
+  final String? callBackendType;
+  final String? application;
+  final String? scope;
 
-  String get id => '$roomId:$callId';
-
-  factory VoipId.fromId(String id) {
-    final int lastIndex = id.lastIndexOf(':');
-    return VoipId(
-      roomId: id.substring(0, lastIndex),
-      callId: id.substring(lastIndex + 1),
-    );
-  }
-
-  VoipId({required this.roomId, required this.callId});
+  VoipId({
+    required this.roomId,
+    required this.callId,
+    this.callBackendType,
+    this.application,
+    this.scope,
+  });
 
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
-      other is VoipId && roomId == other.roomId && callId == other.callId;
+      other is VoipId &&
+          roomId == other.roomId &&
+          callId == other.callId &&
+          callBackendType == other.callBackendType &&
+          application == other.application &&
+          scope == other.scope;
 
   @override
-  int get hashCode => roomId.hashCode ^ callId.hashCode;
+  int get hashCode =>
+      roomId.hashCode ^
+      callId.hashCode ^
+      callBackendType.hashCode ^
+      application.hashCode ^
+      scope.hashCode;
 }

lib/src/voip/utils/famedly_call_extension.dart

@@ -40,6 +40,17 @@ extension FamedlyCallMemberEventsExtension on Room {
     return mem ?? [];
   }
 
+  /// returns a list of memberships in the room for `callParticipant`
+  List<CallMembership> getCallMembershipsForUserWithDeviceId(
+    CallParticipant callParticipant,
+  ) {
+    final userMems = getCallMembershipsForUser(callParticipant.userId);
+    final mem = userMems
+        .where((element) => element.deviceId == callParticipant.deviceId)
+        .toList();
+    return mem;
+  }
+
   /// returns the user count (not sessions, yet) for the group call with id: `groupCallId`.
   /// returns 0 if group call not found
   int groupCallParticipantCount(String groupCallId) {