Start to build groups page

lib/ui/routes/home_route.dart

@@ -2,6 +2,7 @@ import 'package:comunic/helpers/account_helper.dart';
 import 'package:comunic/ui/routes/app_settings_route.dart';
 import 'package:comunic/ui/screens/conversations_list_screen.dart';
 import 'package:comunic/ui/screens/friends_list_screen.dart';
+import 'package:comunic/ui/screens/group_screen.dart';
 import 'package:comunic/ui/screens/groups_list_screen.dart';
 import 'package:comunic/ui/screens/newest_posts.dart';
 import 'package:comunic/ui/screens/notifications_screen.dart';
@@ -21,6 +22,10 @@ import 'login_route.dart';
 class HomeRoute extends StatefulWidget {
   @override
   State<StatefulWidget> createState() => _HomeRouteState();
+
+  /// Get current instance of Home controller
+  static HomeController of(BuildContext context) =>
+      context.findAncestorStateOfType<HomeController>();
 }
 
 class CurrPage {
@@ -28,9 +33,24 @@ class CurrPage {
   final Map<String, dynamic> args;
 
   const CurrPage(this.action, {this.args}) : assert(action != null);
+
+  @override
+  String toString() =>
+      "CurrPage {\n\taction: " +
+      this.action.toString() +
+      "\n\targs: " +
+      this.args.toString() +
+      "\n}";
 }
 
-class _HomeRouteState extends State<HomeRoute> {
+/// Public interface of home controller
+abstract class HomeController extends State<HomeRoute> {
+  /// Open a specific group page specified by its [groupID]
+  void openGroup(int groupID);
+}
+
+/// Private implementation of HomeController
+class _HomeRouteState extends HomeController {
   CurrPage get _currTab => history.last;
   List<CurrPage> history = List();
 
@@ -106,6 +126,9 @@ class _HomeRouteState extends State<HomeRoute> {
       case BarCallbackActions.OPEN_GROUPS:
         return GroupsListScreen();
 
+      case BarCallbackActions.OPEN_GROUP_PAGE:
+        return GroupPageScreen(groupID: _currTab.args["groupID"]);
+
       default:
         throw "Invalid tab : " + _currTab.toString();
     }
@@ -156,4 +179,10 @@ class _HomeRouteState extends State<HomeRoute> {
       return LoginRoute();
     }));
   }
+
+  @override
+  void openGroup(int groupID) {
+    _pushPage(CurrPage(BarCallbackActions.OPEN_GROUP_PAGE,
+        args: {"groupID": groupID}));
+  }
 }

lib/ui/screens/group_access_denied_screen.dart

@@ -0,0 +1,106 @@
+import 'package:comunic/helpers/groups_helper.dart';
+import 'package:comunic/models/group.dart';
+import 'package:comunic/ui/widgets/group_icon_widget.dart';
+import 'package:comunic/ui/widgets/group_membership_widget.dart';
+import 'package:comunic/ui/widgets/safe_state.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Group access denied screen
+///
+/// @author Pierre Hubert
+
+class GroupAccessDeniedScreen extends StatefulWidget {
+  final int groupID;
+  final Function() onMembershipAcquired;
+
+  const GroupAccessDeniedScreen({
+    Key key,
+    @required this.groupID,
+    @required this.onMembershipAcquired,
+  })  : assert(groupID != null),
+        assert(onMembershipAcquired != null),
+        super(key: key);
+
+  @override
+  _GroupAccessDeniedScreenState createState() =>
+      _GroupAccessDeniedScreenState();
+}
+
+class _GroupAccessDeniedScreenState extends SafeState<GroupAccessDeniedScreen> {
+  Group _group;
+
+  bool error = false;
+
+  @override
+  void initState() {
+    _refresh();
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (error)
+      return buildErrorCard(tr("Could not get basic group information!"),
+          actions: [
+            MaterialButton(
+              child: Text(tr("Try again").toUpperCase()),
+              onPressed: () => this._refresh(),
+            )
+          ]);
+
+    if (_group == null) return buildCenteredProgressBar();
+
+    return Padding(
+      padding: const EdgeInsets.all(8.0),
+      child: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Spacer(
+              flex: 5,
+            ),
+            GroupIcon(group: _group),
+            Spacer(),
+            Text(
+              _group.displayName,
+              style: TextStyle(fontSize: 20),
+            ),
+            Spacer(),
+            Text(tr("A registration is required to access this group page.")),
+            Spacer(),
+            GroupMembershipWidget(
+              group: _group,
+              onUpdated: () => this._refresh(),
+              onError: () => this._refresh(),
+            ),
+            Spacer(
+              flex: 5,
+            )
+          ],
+        ),
+      ),
+    );
+  }
+
+  /// Get basic information about the groups
+  Future<void> _refresh() async {
+    try {
+      setState(() {
+        error = false;
+        _group = null;
+      });
+
+      // Get information about a single group
+      final group = await GroupsHelper().getSingle(widget.groupID, force: true);
+
+      if (group.getIsAtLeastMember) widget.onMembershipAcquired();
+
+      setState(() => _group = group);
+    } catch (e) {
+      print(e);
+      setState(() => error = true);
+    }
+  }
+}

lib/ui/screens/group_screen.dart

@@ -0,0 +1,80 @@
+import 'package:comunic/helpers/groups_helper.dart';
+import 'package:comunic/ui/screens/group_access_denied_screen.dart';
+import 'package:comunic/ui/widgets/safe_state.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Group screen
+///
+/// @author Pierre Hubert
+
+class GroupPageScreen extends StatefulWidget {
+  final int groupID;
+
+  const GroupPageScreen({Key key, @required this.groupID})
+      : assert(groupID != null),
+        super(key: key);
+
+  @override
+  _GroupPageScreenState createState() => _GroupPageScreenState();
+}
+
+class _GroupPageScreenState extends SafeState<GroupPageScreen> {
+  int get groupID => widget.groupID;
+
+  GetAdvancedInfoResult _getGroupResult;
+  var error = false;
+
+  @override
+  void initState() {
+    _refreshPage();
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (error)
+      return buildErrorCard(tr("Could not load information about the group!"),
+          actions: [
+            MaterialButton(
+              onPressed: () => _refreshPage(),
+              child: Text(tr("Try again").toUpperCase()),
+            )
+          ]);
+
+    // If we are still loading the page
+    if (_getGroupResult == null) return buildCenteredProgressBar();
+
+    // Check if access to the group was denied
+    if (_getGroupResult.status == GetAdvancedInfoStatus.ACCESS_DENIED)
+      return GroupAccessDeniedScreen(
+        groupID: groupID,
+        onMembershipAcquired: () => _refreshPage(),
+      );
+
+    // Create another screen for the group page
+  }
+
+  /// Refresh the page
+  Future<void> _refreshPage() async {
+    try {
+      setState(() {
+        error = false;
+        _getGroupResult = null;
+      });
+
+      // Get information about the group
+      final result = await GroupsHelper().getAdvancedInfo(groupID);
+
+      setState(() {
+        _getGroupResult = result;
+      });
+    } catch (e) {
+      print(e);
+      setState(() {
+        error = true;
+      });
+    }
+  }
+}

lib/ui/screens/groups_list_screen.dart

@@ -1,6 +1,7 @@
 import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/lists/groups_list.dart';
 import 'package:comunic/models/group.dart';
+import 'package:comunic/ui/routes/home_route.dart';
 import 'package:comunic/ui/widgets/group_icon_widget.dart';
 import 'package:comunic/ui/widgets/group_membership_widget.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
@@ -40,7 +41,7 @@ class _GroupsListScreenState extends SafeState<GroupsListScreen> {
           hide: !_error,
           actions: [
             MaterialButton(
-              child: Text(tr("Try again".toUpperCase())),
+              child: Text(tr("Try again").toUpperCase()),
               onPressed: () => _refreshList(),
             ),
           ],
@@ -66,6 +67,7 @@ class _GroupsListScreenState extends SafeState<GroupsListScreen> {
                             trailing: IconButton(
                                 icon: Icon(Icons.delete),
                                 onPressed: () => _deleteGroup(g)),
+                            onTap: () => HomeRoute.of(context).openGroup(g.id),
                           ))
                       .toList(),
                 ),

lib/ui/widgets/group_membership_widget.dart

@@ -13,11 +13,11 @@ import 'package:flutter/material.dart';
 class GroupMembershipWidget extends StatefulWidget {
   final Group group;
   final Function() onUpdated;
+  final Function() onError;
 
-  const GroupMembershipWidget({
-    @required this.group,
-    this.onUpdated,
-  }) : assert(group != null);
+  const GroupMembershipWidget(
+      {@required this.group, this.onUpdated, this.onError})
+      : assert(group != null);
 
   @override
   _GroupMembershipWidgetState createState() => _GroupMembershipWidgetState();
@@ -50,6 +50,9 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
 
       case GroupMembershipLevel.VISITOR:
         return _buildVisitorState();
+
+      default:
+        throw Exception("Unkonwn grou pmembership level state: $_level");
     }
   }
 
@@ -84,9 +87,10 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
             message: tr("Do you really want to reject this invitation?")))
       return;
 
-    if (!await GroupsHelper().respondInvitation(_id, accept))
+    if (!await GroupsHelper().respondInvitation(_id, accept)) {
       showSimpleSnack(context, tr("Could not respond to your invitation!"));
-    else {
+      if (this.widget.onError != null) this.widget.onError();
+    } else {
       // Refresh state
       group.membershipLevel =
           accept ? GroupMembershipLevel.MEMBER : GroupMembershipLevel.VISITOR;
@@ -114,9 +118,10 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
 
   /// Cancel group membership request
   void _cancelRequest() async {
-    if (!await GroupsHelper().cancelRequest(_id))
+    if (!await GroupsHelper().cancelRequest(_id)) {
       showSimpleSnack(context, tr("Could not cancel your membership request!"));
-    else {
+      if (this.widget.onError != null) this.widget.onError();
+    } else {
       // Refresh state
       group.membershipLevel = GroupMembershipLevel.VISITOR;
       this.setState(() {});
@@ -138,9 +143,10 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
 
   /// Create new membership request
   void _requestMembership() async {
-    if (!await GroupsHelper().sendRequest(_id))
+    if (!await GroupsHelper().sendRequest(_id)) {
       showSimpleSnack(context, tr("Could not send your membership request!"));
-    else {
+      if (this.widget.onError != null) this.widget.onError();
+    } else {
       // Refresh state
       group.membershipLevel = GroupMembershipLevel.PENDING;
       this.setState(() {});

lib/ui/widgets/navbar_widget.dart

@@ -16,6 +16,7 @@ enum BarCallbackActions {
   OPEN_FRIENDS,
   OPEN_MY_PAGE,
   OPEN_GROUPS,
+  OPEN_GROUP_PAGE,
   OPEN_APP_SETTINGS,
   NONE,
   ACTION_LOGOUT