feat: next map navigation

packages/trashy_road/lib/src/game/view/game_page.dart

@@ -65,7 +65,7 @@ class _GameView extends StatelessWidget {
             );
         Navigator.pushReplacement(
           context,
-          ScorePage.route(score: state.score),
+          ScorePage.route(identifier: state.identifier),
         );
       },
       child: Stack(

packages/trashy_road/lib/src/maps/bloc/game_maps_bloc.dart

@@ -27,14 +27,10 @@ class GameMapsBloc extends Bloc<GameMapsEvent, GameMapsState> {
 
     final firstTimeCompleted = currentMap.score == 0;
     if (firstTimeCompleted) {
-      final mapsList = state.maps.keys.toList();
-      final currentIndex = mapsList.indexOf(event.identifier);
-      final nextIndex = currentIndex + 1;
+      final nextMap = state.next(currentMap.identifier);
 
-      final isLastMap = nextIndex == mapsList.length;
+      final isLastMap = nextMap == null;
       if (!isLastMap) {
-        final nextMap = state.maps[mapsList[nextIndex]]!;
-
         newMaps ??= Map.from(state.maps);
         final updatedNextMap = nextMap.copyWith(locked: false);
         newMaps[nextMap.identifier] = updatedNextMap;

packages/trashy_road/lib/src/maps/bloc/game_maps_state.dart

@@ -31,6 +31,20 @@ class GameMapsState extends Equatable {
 
   final GameMapsCollection maps;
 
+  /// Returns the next map in the collection.
+  ///
+  /// If there are no more maps, it will return `null`.
+  GameMap? next(String identifier) {
+    final mapsList = maps.keys.toList();
+    final currentIndex = mapsList.indexOf(identifier);
+    final nextIndex = currentIndex + 1;
+
+    final isLastMap = nextIndex == mapsList.length;
+    if (isLastMap) return null;
+
+    return maps[mapsList[nextIndex]];
+  }
+
   GameMapsState copyWith({
     Map<String, GameMap>? maps,
   }) {

packages/trashy_road/lib/src/score/view/score_page.dart

@@ -1,30 +1,61 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:trashy_road/src/game/game.dart';
+import 'package:trashy_road/src/loading/loading.dart';
+import 'package:trashy_road/src/maps/maps.dart';
 
 class ScorePage extends StatelessWidget {
   const ScorePage({
-    required int score,
+    required String identifier,
     super.key,
-  }) : _score = score;
+  }) : _identifier = identifier;
 
-  final int _score;
+  final String _identifier;
 
   static Route<void> route({
-    required int score,
+    required String identifier,
   }) {
     return MaterialPageRoute<void>(
-      builder: (_) => ScorePage(score: score),
+      builder: (_) => ScorePage(identifier: identifier),
+    );
+  }
+
+  void _onNextMap(BuildContext context, {required GameMap nextMap}) {
+    if (nextMap.locked) return;
+
+    final preloadCubit = context.read<PreloadCubit>();
+    final tiledMap = preloadCubit.tiled.fromCache(nextMap.path);
+
+    Navigator.of(context).pushReplacement(
+      GamePage.route(
+        identifier: nextMap.identifier,
+        tiledMap: tiledMap,
+      ),
     );
   }
 
   @override
   Widget build(BuildContext context) {
+    final gameMapsBloc = context.read<GameMapsBloc>();
+
+    final map = gameMapsBloc.state.maps[_identifier]!;
+
+    final score = map.score;
+    final nextMap = gameMapsBloc.state.next(_identifier);
+
     return Scaffold(
       appBar: AppBar(
         title: const Text('Score'),
       ),
       body: Center(
-        child: Text('Score: $_score'),
+        child: Text('Score: $score'),
       ),
+      floatingActionButton: nextMap != null
+          ? FloatingActionButton(
+              onPressed: () => _onNextMap(context, nextMap: nextMap),
+              child: const Icon(Icons.play_arrow),
+            )
+          : null,
     );
   }
 }