Can request to join a Forez group

lib/forez/helpers/forez_group_helper.dart

@@ -0,0 +1,19 @@
+import 'package:comunic/helpers/preferences_helper.dart';
+
+/// Forez group helper
+///
+/// Contains the ID of the currently selected Forez group
+///
+/// @author Pierre Hubert
+
+class ForezGroupHelper {
+  static Future<void> setId(int groupID) async {
+    (await PreferencesHelper.getInstance())
+        .setInt(PreferencesKeyList.FOREZ_GROUP, groupID);
+  }
+
+  static Future<int> getId() async {
+    return (await PreferencesHelper.getInstance())
+        .getInt(PreferencesKeyList.FOREZ_GROUP);
+  }
+}

lib/forez/tour/forez_tour_builder.dart

@@ -15,7 +15,7 @@ const _JOIN_GROUP_KEY_ID = 1;
 
 List<Widget> buildTour(TourRouteState state) {
   if (!state.pubKeys.containsKey(_JOIN_GROUP_KEY_ID))
-    state.pubKeys[_JOIN_GROUP_KEY_ID] = GlobalKey();
+    state.pubKeys[_JOIN_GROUP_KEY_ID] = GlobalKey<JoinGroupPaneBodyState>();
 
   return [
     FirstTourPane(

lib/forez/tour/join_group_pane.dart

@@ -1,8 +1,13 @@
+import 'package:comunic/forez/helpers/forez_group_helper.dart';
 import 'package:comunic/helpers/forez_groups_helper.dart';
+import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/models/group.dart';
+import 'package:comunic/ui/dialogs/alert_dialog.dart';
 import 'package:comunic/ui/widgets/async_screen_widget.dart';
 import 'package:comunic/ui/widgets/tour/presentation_pane.dart';
 import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/log_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
 
 /// Ask the user to join a Forez group
@@ -12,14 +17,16 @@ import 'package:flutter/material.dart';
 class JoinGroupPane extends PresentationPane {
   JoinGroupPane({
     @required Function() onUpdated,
-    @required GlobalKey key,
+    @required GlobalKey<JoinGroupPaneBodyState> key,
   }) : super(
           icon: Icons.login,
-          title: tr("Join a group"),
+          title: tr("Join a Forez group"),
           child: (c) => _JoinGroupPaneBody(
             key: key,
             onUpdated: onUpdated,
           ),
+          canGoNext: key?.currentState?.canGoNext ?? false,
+          onTapNext: (c) => key.currentState.validateChoice(),
         );
 }
 
@@ -33,14 +40,20 @@ class _JoinGroupPaneBody extends StatefulWidget {
         super(key: key);
 
   @override
-  __JoinGroupPaneBodyState createState() => __JoinGroupPaneBodyState();
+  JoinGroupPaneBodyState createState() => JoinGroupPaneBodyState();
 }
 
-class __JoinGroupPaneBodyState extends State<_JoinGroupPaneBody> {
+class JoinGroupPaneBodyState extends State<_JoinGroupPaneBody> {
   List<Group> _groups;
+  int _currChoice;
+
+  bool get canGoNext => _currChoice != null && _currChoice > 0;
+
+  Group get _currGroup => _groups.firstWhere((e) => e.id == _currChoice);
 
   Future<void> _load() async {
     _groups = await ForezGroupsHelper.getForezGroups();
+    _currChoice = _groups[0].id;
   }
 
   @override
@@ -49,18 +62,60 @@ class __JoinGroupPaneBodyState extends State<_JoinGroupPaneBody> {
       onBuild: onBuild,
       errorMessage: tr("Failed to load the list of Forez groups!"));
 
-  List<Widget> get _initialWidgets => [
-        Text(tr("Please choose now the Forez group you want to join...")),
-      ];
+  Widget onBuild() => ConstrainedBox(
+        constraints: BoxConstraints(maxWidth: 300),
+        child: Column(
+          children: [
+            Text(tr("Please choose now the Forez group you want to join...")),
+          ]..addAll(_groups.map((e) => RadioListTile(
+                value: e.id,
+                groupValue: _currChoice,
+                onChanged: (v) => setState(() => _currChoice = _currChoice),
+                title: Text(e.name),
+                subtitle: Text(e.membershipText),
+              ))),
+        ),
+      );
 
-  Widget onBuild() => Flexible(
-          child: ListView.builder(
-        itemCount: _initialWidgets.length + _groups.length,
-        itemBuilder: (c, i) {
-          if (i < _initialWidgets.length) return _initialWidgets[i];
+  Future<bool> validateChoice() async {
+    try {
+      switch (_currGroup.membershipLevel) {
+        case GroupMembershipLevel.VISITOR:
+          if (!await GroupsHelper.sendRequest(_currGroup.id))
+            throw Exception("Failed to send group membership request!");
+          break;
 
-          final group = _groups[i - _initialWidgets.length];
-          return ListTile();
-        },
-      ));
+        case GroupMembershipLevel.INVITED:
+          if (!await GroupsHelper.respondInvitation(_currGroup.id, true))
+            throw Exception(
+                "Failed to respond to group membership invitation!");
+          break;
+
+        case GroupMembershipLevel.PENDING:
+          break;
+
+        case GroupMembershipLevel.ADMINISTRATOR:
+        case GroupMembershipLevel.MODERATOR:
+        case GroupMembershipLevel.MEMBER:
+          break;
+      }
+
+      // Check if the user can not access yet the group
+      if ((_currGroup.membershipLevel == GroupMembershipLevel.VISITOR &&
+              _currGroup.registrationLevel != GroupRegistrationLevel.OPEN) ||
+          _currGroup.membershipLevel == GroupMembershipLevel.PENDING) {
+        await alert(context,
+            tr("You can not access this group yet, please wait for a member of the group to accept your request. Hopefully this will not be too long. Please check back soon!"));
+
+        return false;
+      }
+
+      await ForezGroupHelper.setId(_currGroup.id);
+      return true;
+    } catch (e, s) {
+      logError(e, s);
+      snack(context, tr("Failed to register to group!"));
+      return false;
+    }
+  }
 }