Start to build group settings screen

lib/helpers/groups_helper.dart

@@ -177,6 +177,21 @@ class GroupsHelper {
     }
   }
 
+  /// Get group settings
+  ///
+  /// This function is currently a kind of alias, but it might
+  /// change in the future
+  ///
+  /// Throws in case of error
+  Future<AdvancedGroupInfo> getSettings(int groupID) async {
+    final groupInfo = await getAdvancedInfo(groupID);
+
+    if (groupInfo.status != GetAdvancedInfoStatus.SUCCESS)
+      throw Exception("Could not get group information!");
+
+    return groupInfo.info;
+  }
+
   /// Turn an API entry into a group object
   Group _getGroupFromAPI(Map<String, dynamic> map) {
     return Group(

lib/models/group.dart

@@ -59,6 +59,8 @@ class Group {
       membershipLevel == GroupMembershipLevel.MODERATOR ||
       membershipLevel == GroupMembershipLevel.MEMBER;
 
+  bool get isAdmin => membershipLevel == GroupMembershipLevel.ADMINISTRATOR;
+
   bool get canCreatePost =>
       membershipLevel == GroupMembershipLevel.ADMINISTRATOR ||
       membershipLevel == GroupMembershipLevel.MODERATOR ||

lib/ui/screens/authorized_group_page_screen.dart

@@ -1,6 +1,8 @@
 import 'package:comunic/enums/post_target.dart';
 import 'package:comunic/helpers/posts_helper.dart';
 import 'package:comunic/models/advanced_group_info.dart';
+import 'package:comunic/ui/routes/main_route.dart';
+import 'package:comunic/ui/screens/group_settings_screen.dart';
 import 'package:comunic/ui/widgets/group_following_widget.dart';
 import 'package:comunic/ui/widgets/group_icon_widget.dart';
 import 'package:comunic/ui/widgets/group_membership_widget.dart';
@@ -8,6 +10,7 @@ import 'package:comunic/ui/widgets/like_widget.dart';
 import 'package:comunic/ui/widgets/post_create_form_widget.dart';
 import 'package:comunic/ui/widgets/posts_list_widget.dart';
 import 'package:comunic/ui/widgets/scroll_watcher.dart';
+import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
 
 /// Authorized group page screen
@@ -16,6 +19,8 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre Hubert
 
+enum _MenuItems { OPEN_SETTINGS }
+
 class AuthorizedGroupPageScreen extends StatefulWidget {
   final AdvancedGroupInfo advancedGroupInfo;
   final Function() needRefresh;
@@ -97,9 +102,19 @@ class _AuthorizedGroupPageScreenState extends State<AuthorizedGroupPageScreen> {
                 ),
                 LikeWidget(
                   likeElement: _group,
+                ),
+              ],
+            ),
+            PopupMenuButton<_MenuItems>(
+              itemBuilder: (c) => [
+                PopupMenuItem(
+                  child: Text(tr("Group settings")),
+                  value: _MenuItems.OPEN_SETTINGS,
+                  enabled: _group.isAdmin,
                 )
               ],
-            )
+              onSelected: _handleMenuSelection,
+            ),
           ],
         ),
       ),
@@ -127,4 +142,14 @@ class _AuthorizedGroupPageScreenState extends State<AuthorizedGroupPageScreen> {
       buildListView: false,
     );
   }
+
+  /// Handles menu selection
+  void _handleMenuSelection(_MenuItems item) {
+    switch (item) {
+      case _MenuItems.OPEN_SETTINGS:
+        MainController.of(context)
+            .push(GroupSettingsScreen(groupID: _group.id));
+        break;
+    }
+  }
 }

lib/ui/screens/group_settings_screen.dart

@@ -0,0 +1,68 @@
+import 'package:comunic/helpers/groups_helper.dart';
+import 'package:comunic/models/advanced_group_info.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/utils/intl_utils.dart';
+import 'package:flutter/material.dart';
+import 'package:settings_ui/settings_ui.dart';
+
+/// Groups settings screen
+///
+/// @author Pierre Hubert
+
+class GroupSettingsScreen extends StatefulWidget {
+  final int groupID;
+
+  const GroupSettingsScreen({Key key, @required this.groupID})
+      : assert(groupID != null),
+        super(key: key);
+
+  @override
+  _GroupSettingsScreenState createState() => _GroupSettingsScreenState();
+}
+
+class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
+  AdvancedGroupInfo _groupSettings;
+
+  Future<void> _refresh() async {
+    _groupSettings = await GroupsHelper().getSettings(widget.groupID);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        leading: ComunicBackButton(),
+        title: Text(tr("Group settings")),
+      ),
+      body: _buildBody(),
+    );
+  }
+
+  Widget _buildBody() {
+    return AsyncScreenWidget(
+      onReload: _refresh,
+      onBuild: _buildContent,
+      errorMessage: tr("Could not get group settings!"),
+    );
+  }
+
+  Widget _buildContent() {
+    return SettingsList(
+      sections: [_buildGeneralSection()],
+    );
+  }
+
+  Widget _buildGeneralSection() {
+    return SettingsSection(
+      title: tr("General information"),
+      tiles: [
+        SettingsTile(
+          title: tr("Group ID"),
+          subtitle: _groupSettings.id.toString(),
+        ),
+      ],
+    );
+  }
+}