added guardian letters with chat and multiple answer functionalities

lib/state/app/modules/app_modules.dart

@@ -1,4 +1,3 @@
-import 'package:badges/badges.dart' as badges;
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
@@ -16,14 +15,18 @@ import '../../../view/pages/holidays/holidays_view.dart';
 import '../../../view/pages/marianum_dates/marianum_dates_view.dart';
 import '../../../view/pages/marianum_message/marianum_message_list_view.dart';
 import '../../../view/pages/more/roomplan/roomplan.dart';
+import '../../../view/pages/parent_letters/parent_letters_view.dart';
 import '../../../view/pages/talk/chat_list.dart';
 import '../../../view/pages/ticker/ticker_view.dart';
 import '../../../view/pages/timetable/timetable.dart';
 import '../../../widget/breaker/breaker.dart';
 import '../../../widget/centered_leading.dart';
+import '../../../widget/module_badge_icon.dart';
 import '../infrastructure/loadable_state/loadable_state.dart';
 import 'chat_list/bloc/chat_list_bloc.dart';
 import 'chat_list/bloc/chat_list_state.dart';
+import 'parent_letters/bloc/parent_letters_bloc.dart';
+import 'parent_letters/bloc/parent_letters_state.dart';
 import 'settings/bloc/settings_cubit.dart';
 
 class AppModule {
@@ -46,6 +49,7 @@ class AppModule {
   static const Map<Modules, Set<AccessRequirement>> requirements = {
     Modules.talk: {AccessRequirement.nextcloud},
     Modules.files: {AccessRequirement.nextcloud},
+    Modules.parentLetters: {AccessRequirement.guardian},
   };
 
   static bool isAvailableFor(Modules module, Session? session) =>
@@ -64,6 +68,18 @@ class AppModule {
         breakerArea: BreakerArea.timetable,
         create: Timetable.new,
       ),
+      Modules.parentLetters: AppModule(
+        Modules.parentLetters,
+        name: 'Elternbriefe',
+        icon: () =>
+            BlocBuilder<ParentLettersBloc, LoadableState<ParentLettersState>>(
+              builder: (context, state) => ModuleBadgeIcon(
+                icon: Icons.mail_outline,
+                count: state.data?.unreadCount ?? 0,
+              ),
+            ),
+        create: ParentLettersView.new,
+      ),
       Modules.ticker: AppModule(
         Modules.ticker,
         name: 'Ticker',
@@ -77,34 +93,15 @@ class AppModule {
         Modules.talk,
         name: 'Talk',
         icon: () => BlocBuilder<ChatListBloc, LoadableState<ChatListState>>(
-          builder: (context, state) {
-            final rooms = state.data?.rooms;
-            if (rooms == null || rooms.data.isEmpty) {
-              return const Icon(Icons.chat);
-            }
-            final messages = rooms.data
-                .map((e) => e.unreadMessages)
-                .reduce((a, b) => a + b);
-            return badges.Badge(
-              showBadge: messages > 0,
-              position: badges.BadgePosition.topEnd(top: -3, end: -3),
-              stackFit: StackFit.loose,
-              badgeStyle: badges.BadgeStyle(
-                padding: const EdgeInsets.all(3),
-                badgeColor: Theme.of(context).primaryColor,
-                elevation: 1,
-              ),
-              badgeContent: Text(
-                '$messages',
-                style: const TextStyle(
-                  color: Colors.white,
-                  fontSize: 10,
-                  fontWeight: FontWeight.bold,
-                ),
-              ),
-              child: const Icon(Icons.chat),
-            );
-          },
+          builder: (context, state) => ModuleBadgeIcon(
+            icon: Icons.chat,
+            count:
+                state.data?.rooms?.data.fold<int>(
+                  0,
+                  (sum, room) => sum + room.unreadMessages,
+                ) ??
+                0,
+          ),
         ),
         breakerArea: BreakerArea.talk,
         create: ChatList.new,
@@ -299,6 +296,7 @@ class AppModule {
 
 enum Modules {
   timetable,
+  parentLetters,
   ticker,
   talk,
   files,