Get the list of members of the call

lib/helpers/calls_helper.dart

@@ -1,5 +1,7 @@
 import 'package:comunic/helpers/websocket_helper.dart';
+import 'package:comunic/lists/call_members_list.dart';
 import 'package:comunic/models/call_config.dart';
+import 'package:comunic/models/call_member.dart';
 
 /// Calls helper
 ///
@@ -21,4 +23,15 @@ class CallsHelper {
       iceServers: response["iceServers"].cast<String>(),
     );
   }
+
+  /// Get current call members
+  static Future<CallMembersList> getMembers(int callID) async =>
+      CallMembersList()
+        ..addAll((await ws("calls/members", {"callID": callID}))
+            .map((f) => CallMember(
+                  id: f["userID"],
+                  status: f["ready"] ? MemberStatus.READY : MemberStatus.JOINED,
+                ))
+            .toList()
+            .cast<CallMember>());
 }

lib/lists/call_members_list.dart

@@ -0,0 +1,8 @@
+import 'package:comunic/lists/abstract_list.dart';
+import 'package:comunic/models/call_member.dart';
+
+/// Call members list
+///
+/// @author Pierre Hubert
+
+class CallMembersList extends AbstractList<CallMember> {}

lib/models/call_member.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/material.dart';
+
+/// Single call member information
+///
+/// @author Pierre Hubert
+
+enum MemberStatus { JOINED, READY }
+
+class CallMember {
+  final int id;
+  final MemberStatus status;
+
+  const CallMember({
+    @required this.id,
+    @required this.status,
+  })  : 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/lists/call_members_list.dart';
 import 'package:comunic/models/call_config.dart';
 import 'package:comunic/models/conversation.dart';
 import 'package:comunic/ui/widgets/comunic_back_button_widget.dart';
@@ -33,6 +34,7 @@ class _CallScreenState extends SafeState<CallScreen> {
   String _convName;
   CallConfig _conf;
   var _error = false;
+  CallMembersList _membersList;
 
   @override
   void initState() {
@@ -63,6 +65,9 @@ class _CallScreenState extends SafeState<CallScreen> {
 
       // Get call configuration
       _conf = await CallsHelper.getConfig();
+
+      // Get current members of the call
+      _membersList = await CallsHelper.getMembers(convID);
     } catch (e, stack) {
       print("Could not initialize call! $e\n$stack");
       setState(() => _error = true);
@@ -92,8 +97,8 @@ class _CallScreenState extends SafeState<CallScreen> {
 
   /// Build widget body
   Widget _buildBody() {
-    if (_error)
     // Handle errors
+    if (_error)
       return buildErrorCard(tr("Could not initialize call!"), actions: [
         MaterialButton(
           onPressed: () => _initCall(),