Start to build groups page

lib/models/advanced_group_info.dart

@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+
+import 'group.dart';
+
+/// Advanced group information
+///
+/// @author Pierre Hubert
+
+class AdvancedGroupInfo extends Group {
+  final int timeCreate;
+  final String description;
+  final String url;
+  final int numberLikes;
+  final bool isLiking;
+
+  AdvancedGroupInfo({
+    @required int id,
+    @required String name,
+    @required String iconURL,
+    @required int numberMembers,
+    @required GroupMembershipLevel membershipLevel,
+    @required GroupVisibilityLevel visibilityLevel,
+    @required GroupRegistrationLevel registrationLevel,
+    @required GroupPostCreationLevel postCreationLevel,
+    @required String virtualDirectory,
+    @required bool following,
+    @required this.timeCreate,
+    @required this.description,
+    @required this.url,
+    @required this.numberLikes,
+    @required this.isLiking,
+  }) : super(
+            id: id,
+            name: name,
+            iconURL: iconURL,
+            numberMembers: numberMembers,
+            membershipLevel: membershipLevel,
+            visibilityLevel: visibilityLevel,
+            registrationLevel: registrationLevel,
+            postCreationLevel: postCreationLevel,
+            virtualDirectory: virtualDirectory,
+            following: following);
+}

lib/models/group.dart

@@ -53,4 +53,9 @@ class Group {
         assert(following != null);
 
   get displayName => this.name;
+
+  bool get getIsAtLeastMember =>
+      membershipLevel == GroupMembershipLevel.ADMINISTRATOR ||
+      membershipLevel == GroupMembershipLevel.MODERATOR ||
+      membershipLevel == GroupMembershipLevel.MEMBER;
 }