Can remove membership

lib/helpers/groups_helper.dart

@@ -100,6 +100,13 @@ class GroupsHelper {
           .map((f) => cast<int>(f))
           .toSet();
 
+  /// Remove group membership
+  Future<bool> removeMembership(int groupID) async =>
+      (await (APIRequest(uri: "groups/remove_membership", needLogin: true)
+                ..addInt("id", groupID))
+              .exec())
+          .isOK;
+
   /// Turn an API entry into a group object
   Group _getGroupFromAPI(Map<String, dynamic> map) {
     return Group(

lib/ui/screens/groups_list_screen.dart

@@ -1,5 +1,6 @@
 import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/lists/groups_list.dart';
+import 'package:comunic/models/group.dart';
 import 'package:comunic/ui/widgets/group_icon_widget.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/utils/intl_utils.dart';
@@ -16,11 +17,11 @@ class GroupsListScreen extends StatefulWidget {
 }
 
 class _GroupsListScreenState extends SafeState<GroupsListScreen> {
-  /// The list of groups
   GroupsList _groups;
-
   bool _error = false;
 
+  final _refreshIndicatorKey = GlobalKey<RefreshIndicatorState>();
+
   @override
   void initState() {
     super.initState();
@@ -47,6 +48,7 @@ class _GroupsListScreenState extends SafeState<GroupsListScreen> {
         // List of groups
         Expanded(
             child: RefreshIndicator(
+          key: _refreshIndicatorKey,
           onRefresh: () => this._refreshList(),
           child: _groups == null
               ? Container()
@@ -55,6 +57,9 @@ class _GroupsListScreenState extends SafeState<GroupsListScreen> {
                       .map((g) => ListTile(
                             leading: GroupIcon(group: g),
                             title: Text(g.displayName),
+                            trailing: IconButton(
+                                icon: Icon(Icons.delete),
+                                onPressed: () => _deleteGroup(g)),
                           ))
                       .toList(),
                 ),
@@ -81,4 +86,19 @@ class _GroupsListScreenState extends SafeState<GroupsListScreen> {
       });
     }
   }
+
+  /// Remove a group from the list
+  void _deleteGroup(Group g) async {
+    if (!await showConfirmDialog(
+        context: context,
+        message: tr("Do you really want to delete this group membership ?")))
+      return;
+
+    if (!await GroupsHelper().removeMembership(g.id))
+      showSimpleSnack(
+          context, tr("Could not remove your membership to this group!"));
+
+    // Refresh the list of groups
+    _refreshIndicatorKey.currentState.show();
+  }
 }