Handles join / leave events

lib/helpers/events_helper.dart

@@ -70,6 +70,22 @@ class DeletedConversationMessageEvent {
   DeletedConversationMessageEvent(this.msg);
 }
 
+/// User joined call event
+class UserJoinedCallEvent {
+  final int callID;
+  final int userID;
+
+  UserJoinedCallEvent(this.callID, this.userID);
+}
+
+/// User left call event
+class UserLeftCallEvent {
+  final int callID;
+  final int userID;
+
+  UserLeftCallEvent(this.callID, this.userID);
+}
+
 class EventsHelper {
   static EventBus _mgr = EventBus();
 

lib/helpers/websocket_helper.dart

@@ -161,6 +161,18 @@ class WebSocketHelper {
             ConversationsHelper.apiToConversationMessage(msg.data)));
         break;
 
+      // A user joined a call
+      case "user_joined_call":
+        EventsHelper.emit(
+            UserJoinedCallEvent(msg.data["callID"], msg.data["userID"]));
+        break;
+
+      // A user left a call
+      case "user_left_call":
+        EventsHelper.emit(
+            UserLeftCallEvent(msg.data["callID"], msg.data["userID"]));
+        break;
+
       default:
         throw Exception("Unknown message type: ${msg.title}");
     }

lib/models/call_member.dart

@@ -12,7 +12,7 @@ class CallMember {
 
   const CallMember({
     @required this.id,
-    @required this.status,
+    this.status = MemberStatus.JOINED,
   })  : assert(id != null),
         assert(status != null);
 }

lib/ui/screens/call_screen.dart

@@ -1,5 +1,6 @@
 import 'package:comunic/helpers/calls_helper.dart';
 import 'package:comunic/helpers/conversations_helper.dart';
+import 'package:comunic/helpers/events_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/call_members_list.dart';
 import 'package:comunic/lists/users_list.dart';
@@ -78,6 +79,15 @@ class _CallScreenState extends SafeState<CallScreen> {
       _membersList = membersList;
 
       setState(() {});
+
+      // Register to events
+      this.listenChangeState<UserJoinedCallEvent>((e) {
+        if (e.callID == convID) _membersList.add(CallMember(id: e.userID));
+      });
+
+      this.listen<UserLeftCallEvent>((e) {
+        if (e.callID == convID) _removeMember(e.userID);
+      });
     } catch (e, stack) {
       print("Could not initialize call! $e\n$stack");
       setState(() => _error = true);
@@ -93,6 +103,11 @@ class _CallScreenState extends SafeState<CallScreen> {
     }
   }
 
+  void _removeMember(int memberID) {
+    _membersList.removeUser(memberID);
+    setState(() {});
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(