fix: Multiple fixes

- Improve performance when a lot of items are "unknown". Thanks to https://github.com/dattran-pt19/group_grid_view
- Fix some behaviour in the refresh code

lib/src/ui/bloc/anime_list_bloc.dart

@@ -36,6 +36,8 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
   final List<MangaTrackingData> _mangas =
       List<MangaTrackingData>.empty(growable: true);
 
+  List<AnimeTrackingData> get unfilteredAnime => _animes;
+
   List<AnimeTrackingData> _getFilteredAnime({
     MediumTrackingState? trackingState,
   }) {

lib/src/ui/bloc/calendar_bloc.dart

@@ -28,7 +28,7 @@ class CalendarBloc extends Bloc<CalendarEvent, CalendarState> {
     );
 
     final al = GetIt.I.get<AnimeListBloc>();
-    final animes = al.state.animes.where((anime) => anime.airing);
+    final animes = al.unfilteredAnime.where((anime) => anime.airing);
     emit(
       state.copyWith(
         refreshing: true,
@@ -40,21 +40,33 @@ class CalendarBloc extends Bloc<CalendarEvent, CalendarState> {
     for (final anime in animes) {
       emit(state.copyWith(refreshingCount: state.refreshingCount + 1));
 
-      Anime apiData;
+      String? broadcastDay;
+      bool airing;
       try {
-        apiData = await Jikan().getAnime(int.parse(anime.id));
+        final apiData = await Jikan().getAnime(int.parse(anime.id));
-      } catch (_) {
+        airing = apiData.airing;
-        print('API request for anime ${anime.id} failed');
+        broadcastDay = apiData.broadcast?.split(' ').first;
-        continue;
+      } catch (ex) {
+        print('API request for anime ${anime.id} failed: $ex');
+        airing = false;
       }
 
-      if (!apiData.airing) {
+      print('Anime "${anime.title}": airing=${airing}');
+      if (!airing) {
         al.add(
           AnimeUpdatedEvent(
             anime.copyWith(airing: false, broadcastDay: null),
             commit: true,
           ),
         );
+      } else if (anime.broadcastDay != broadcastDay) {
+        print('Updating Anime "${anime.title}": broadcastDay=$broadcastDay');
+        al.add(
+          AnimeUpdatedEvent(
+            anime.copyWith(airing: true, broadcastDay: broadcastDay),
+            commit: true,
+          ),
+        );
       }
 
       // Prevent hammering Jikan

lib/src/ui/pages/calendar.dart

@@ -9,6 +9,7 @@ import 'package:anitrack/src/ui/widgets/grid_item.dart';
 import 'package:anitrack/src/ui/widgets/image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:get_it/get_it.dart';
 
 enum Weekday {
   monday,
@@ -52,7 +53,7 @@ extension AddIfExists<K, V> on Map<K, List<V>> {
   }
 }
 
-class CalendarPage extends StatelessWidget {
+class CalendarPage extends StatefulWidget {
   const CalendarPage({super.key});
 
   static MaterialPageRoute<dynamic> get route => MaterialPageRoute<dynamic>(
@@ -62,6 +63,11 @@ class CalendarPage extends StatelessWidget {
         ),
       );
 
+  @override
+  CalendarPageState createState() => CalendarPageState();
+}
+
+class CalendarPageState extends State<CalendarPage> {
   List<Widget> _renderWeekdayList(
     BuildContext context,
     Weekday day,
@@ -73,11 +79,12 @@ class CalendarPage extends StatelessWidget {
 
     assert(data[day]!.isNotEmpty, 'There should be at least one anime');
     return [
-      Padding(
+      SliverToBoxAdapter(
+        child: Padding(
           padding: const EdgeInsets.only(
-          left: 16,
+            left: 0,
             right: 16,
-          top: 16,
+            top: 20,
             bottom: 4,
           ),
           child: Text(
@@ -85,11 +92,8 @@ class CalendarPage extends StatelessWidget {
             style: Theme.of(context).textTheme.titleLarge,
           ),
         ),
-      Padding(
+      ),
-        padding: const EdgeInsets.symmetric(horizontal: 16),
+      SliverGrid.builder(
-        child: GridView.builder(
-          physics: const NeverScrollableScrollPhysics(),
-          shrinkWrap: true,
         gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
           crossAxisCount: 3,
           mainAxisSpacing: 8,
@@ -115,19 +119,13 @@ class CalendarPage extends StatelessWidget {
           );
         },
       ),
-      ),
     ];
   }
 
   @override
   Widget build(BuildContext context) {
-    return BlocBuilder<CalendarBloc, CalendarState>(
-      builder: (context, calendarState) =>
-          BlocBuilder<AnimeListBloc, AnimeListState>(
-        buildWhen: (previous, current) => !calendarState.refreshing,
-        builder: (context, state) {
     final airingAnimeMap = <Weekday, List<AnimeTrackingData>>{};
-          for (final anime in state.animes) {
+    for (final anime in GetIt.I.get<AnimeListBloc>().unfilteredAnime) {
       if (!anime.airing) continue;
 
       final Weekday day;
@@ -161,7 +159,16 @@ class CalendarPage extends StatelessWidget {
       airingAnimeMap.addOrSet(day, anime);
     }
 
-          return Scaffold(
+    return BlocListener<CalendarBloc, CalendarState>(
+      listenWhen: (previous, current) =>
+          previous.refreshing != current.refreshing,
+      listener: (context, state) {
+        // Force an update
+        if (!state.refreshing) {
+          setState(() {});
+        }
+      },
+      child: Scaffold(
         appBar: AppBar(
           title: Text(t.calendar.calendar),
           actions: [
@@ -177,12 +184,12 @@ class CalendarPage extends StatelessWidget {
         body: Stack(
           children: [
             Positioned(
-                  left: 0,
+              left: 8,
-                  right: 0,
+              right: 8,
               top: 0,
               bottom: 0,
-                  child: ListView(
+              child: CustomScrollView(
-                    children: [
+                slivers: [
                   // Render all available weekdays
                   ..._renderWeekdayList(
                     context,
@@ -227,9 +234,11 @@ class CalendarPage extends StatelessWidget {
 
                   // Provide a nice bottom padding, while keeping the elastic effect attached
                   // to the bottom-most edge.
-                      const SizedBox(
+                  const SliverToBoxAdapter(
+                    child: SizedBox(
                       height: 16,
                     ),
+                  ),
                 ],
               ),
             ),
@@ -239,6 +248,8 @@ class CalendarPage extends StatelessWidget {
               top: 0,
               bottom: 0,
               child: BlocBuilder<CalendarBloc, CalendarState>(
+                buildWhen: (previous, current) =>
+                    previous.refreshing != current.refreshing,
                 builder: (context, state) {
                   if (!state.refreshing) {
                     return const SizedBox();
@@ -296,8 +307,6 @@ class CalendarPage extends StatelessWidget {
             ),
           ],
         ),
-          );
-        },
       ),
     );
   }