Get and show the name of conversation members

lib/models/conversation.dart

@@ -27,4 +27,7 @@ class Conversation {
         assert(following != null),
         assert(sawLastMessage != null),
         assert(members != null);
+
+  /// Check out whether a conversation has a fixed name or not
+  bool get has_name => this.name != null;
 }

lib/models/user.dart

@@ -0,0 +1,31 @@
+import 'package:comunic/enums/user_page_visibility.dart';
+import 'package:meta/meta.dart';
+
+/// Single user information
+///
+/// @author Pierre HUBERT
+
+class User {
+  final int id;
+  final String firstName;
+  final String lastName;
+  final UserPageVisibility pageVisibility;
+  final String virtualDirectory;
+  final String accountImageURL;
+
+  const User({
+    @required this.id,
+    @required this.firstName,
+    @required this.lastName,
+    @required this.pageVisibility,
+    @required this.virtualDirectory,
+    @required this.accountImageURL,
+  })  : assert(id != null),
+        assert(firstName != null),
+        assert(lastName != null),
+        assert(pageVisibility != null),
+        assert(accountImageURL != null);
+
+  /// Get user full name
+  String get fullName => firstName + " " + lastName;
+}