Can change group visibility

lib/models/group.dart

@@ -25,7 +25,7 @@ class Group {
   final String iconURL;
   final int numberMembers;
   GroupMembershipLevel membershipLevel;
-  final GroupVisibilityLevel visibilityLevel;
+  GroupVisibilityLevel visibilityLevel;
   final GroupRegistrationLevel registrationLevel;
   final GroupPostCreationLevel postCreationLevel;
   String virtualDirectory;

lib/ui/screens/group_settings_screen.dart

@@ -1,9 +1,12 @@
 import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/models/advanced_group_info.dart';
+import 'package:comunic/models/group.dart';
+import 'package:comunic/ui/dialogs/multi_choices_dialog.dart';
 import 'package:comunic/ui/dialogs/virtual_directory_dialog.dart';
 import 'package:comunic/ui/widgets/async_screen_widget.dart';
 import 'package:comunic/ui/widgets/comunic_back_button_widget.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
+import 'package:comunic/ui/widgets/settings/multi_choices_settings_tile.dart';
 import 'package:comunic/ui/widgets/settings/text_settings_edit_tile.dart';
 import 'package:comunic/utils/input_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
@@ -69,7 +72,10 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
 
   Widget _buildContent() {
     return SettingsList(
-      sections: [_buildGeneralSection()],
+      sections: [
+        _buildGeneralSection(),
+        _buildAccessRestrictions(),
+      ],
     );
   }
 
@@ -137,4 +143,37 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
       ],
     );
   }
+
+  List<MultiChoiceEntry<GroupVisibilityLevel>> get _visibilityLevels => [
+        MultiChoiceEntry(
+          id: GroupVisibilityLevel.OPEN,
+          title: tr("Open group"),
+          subtitle:
+              tr("Group information & public posts are available to everyone."),
+        ),
+        MultiChoiceEntry(
+          id: GroupVisibilityLevel.PRIVATE,
+          title: tr("Private groupe"),
+          subtitle: tr("The group is accessible to accepted members only."),
+        ),
+        MultiChoiceEntry(
+          id: GroupVisibilityLevel.SECRETE,
+          title: tr("Secrete groupe"),
+          subtitle: tr("The group is visible only to invited members."),
+        ),
+      ];
+
+  Widget _buildAccessRestrictions() => SettingsSection(
+        title: tr("Access restrictions"),
+        tiles: [
+          MultiChoicesSettingsTile(
+              title: tr("Group visibility"),
+              choices: _visibilityLevels,
+              currentValue: _groupSettings.visibilityLevel,
+              onChanged: (v) {
+                _groupSettings.visibilityLevel = v;
+                _updateSettings();
+              })
+        ],
+      );
 }

lib/ui/widgets/settings/multi_choices_settings_tile.dart

@@ -0,0 +1,46 @@
+import 'package:comunic/ui/dialogs/multi_choices_dialog.dart';
+import 'package:flutter/material.dart';
+import 'package:settings_ui/settings_ui.dart';
+
+/// Multiple choices settings tile
+///
+/// @author Pierre Hubert
+
+class MultiChoicesSettingsTile<T> extends SettingsTile {
+  final String title;
+  final List<MultiChoiceEntry<T>> choices;
+  final T currentValue;
+  final Function(T) onChanged;
+
+  const MultiChoicesSettingsTile({
+    Key key,
+    @required this.title,
+    @required this.choices,
+    @required this.currentValue,
+    @required this.onChanged,
+  })  : assert(title != null),
+        assert(choices != null),
+        assert(currentValue != null),
+        assert(onChanged != null);
+
+  @override
+  Widget build(BuildContext context) {
+    return SettingsTile(
+      title: title,
+      subtitle: choices.firstWhere((f) => f.id == currentValue).title,
+      onTap: () => _changeValue(context),
+    );
+  }
+
+  /// When the user request to change the current value
+  void _changeValue(BuildContext context) async {
+    final newChoice = await showMultiChoicesDialog(
+      context: context,
+      choices: choices,
+      defaultChoice: currentValue,
+      title: title,
+    );
+    if (newChoice == null) return;
+    onChanged(newChoice);
+  }
+}