Ready to build presence section

lib/helpers/groups_helper.dart

@@ -409,6 +409,7 @@ class GroupsHelper {
             .map((s) => ConversationsHelper.apiToConversation(s))
             .cast<Conversation>()
             .toList(),
+        isForezGroup: map["is_forez_group"],
       );
 
   /// Create [GroupMembership] object from API entry

lib/models/advanced_group_info.dart

@@ -17,6 +17,7 @@ class AdvancedGroupInfo extends Group implements LikeElement {
   int likes;
   bool userLike;
   List<Conversation> conversations;
+  bool isForezGroup;
 
   AdvancedGroupInfo({
     @required int id,
@@ -36,7 +37,9 @@ class AdvancedGroupInfo extends Group implements LikeElement {
     @required this.likes,
     @required this.userLike,
     @required this.conversations,
-  }) : super(
+    @required this.isForezGroup,
+  })  : assert(isForezGroup != null),
+        super(
             id: id,
             name: name,
             iconURL: iconURL,

lib/models/group.dart

@@ -19,7 +19,7 @@ enum GroupRegistrationLevel { OPEN, MODERATED, CLOSED }
 
 enum GroupPostCreationLevel { MODERATORS, MEMBERS }
 
-class Group {
+class Group implements Comparable<Group> {
   final int id;
   String name;
   final String iconURL;
@@ -70,4 +70,7 @@ class Group {
       membershipLevel == GroupMembershipLevel.MODERATOR ||
       (membershipLevel == GroupMembershipLevel.MEMBER &&
           postCreationLevel == GroupPostCreationLevel.MEMBERS);
+
+  @override
+  int compareTo(Group other) => id.compareTo(other.id);
 }

lib/ui/screens/authorized_group_page_screen.dart

@@ -1,6 +1,7 @@
 import 'package:comunic/models/advanced_group_info.dart';
 import 'package:comunic/ui/routes/main_route/main_route.dart';
 import 'package:comunic/ui/screens/group_sections/about_group_section.dart';
+import 'package:comunic/ui/screens/group_sections/forez_presence_section.dart';
 import 'package:comunic/ui/screens/group_sections/group_conversation_section.dart';
 import 'package:comunic/ui/screens/group_sections/group_members_screen.dart';
 import 'package:comunic/ui/screens/group_sections/group_posts_section.dart';
@@ -57,6 +58,13 @@ class _AuthorizedGroupPageScreenState
           label: tr("Posts"),
         ),
 
+        // Forez presence tab
+        _GroupPageTab(
+          widget: (c) => ForezPresenceSection(),
+          label: tr("Presence"),
+          visible: _group.isForezGroup,
+        ),
+
         // About the group
         _GroupPageTab(
           widget: (c) => AboutGroupSection(group: _group),
@@ -72,7 +80,7 @@ class _AuthorizedGroupPageScreenState
 
         // Add group conversations
         ..insertAll(
-            1,
+            2,
             _group.conversations
                 .map((e) => _GroupPageTab(
                     widget: (c) => GroupConversationSection(conv: e),

lib/ui/screens/group_sections/forez_presence_section.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+/// Forez presence section
+///
+/// @author Pierre Hubert
+
+class ForezPresenceSection extends StatefulWidget {
+  @override
+  _ForezPresenceSectionState createState() => _ForezPresenceSectionState();
+}
+
+class _ForezPresenceSectionState extends State<ForezPresenceSection> {
+  @override
+  Widget build(BuildContext context) {
+    return Container();
+  }
+}

lib/ui/screens/groups_list_screen.dart

@@ -61,7 +61,8 @@ class _GroupsListScreenState extends SafeState<GroupsListScreen> {
   }
 
   Widget _buildGroupsList() => ListView(
-        children: _groups.values
+        children: (_groups.values.toList()
+              ..sort((one, two) => two.id.compareTo(one.id)))
             .map((g) => ListTile(
                   leading: GroupIcon(group: g),
                   title: Text(g.displayName),