Updated folder structure

lib/data/dto/game_manager.dart

@@ -0,0 +1,78 @@
+import 'package:cabo_counter/data/dto/game_session.dart';
+import 'package:cabo_counter/services/local_storage_service.dart';
+import 'package:collection/collection.dart';
+import 'package:flutter/foundation.dart';
+
+class GameManager extends ChangeNotifier {
+  List<GameSession> gameList = [];
+
+  /// Adds a new game session to the list and sorts it by creation date.
+  /// Takes a [GameSession] object as input. It then adds the session to the `gameList`,
+  /// sorts the list in descending order based on the creation date, and notifies listeners of the change.
+  /// It also saves the updated game sessions to local storage.
+  /// Returns the index of the newly added session in the sorted list.
+  int addGameSession(GameSession session) {
+    session.addListener(() {
+      notifyListeners(); // Propagate session changes
+    });
+    gameList.add(session);
+    gameList.sort((a, b) => b.createdAt.compareTo(a.createdAt));
+    notifyListeners();
+    LocalStorageService.saveGameSessions();
+    return gameList.indexOf(session);
+  }
+
+  /// Retrieves a game session by its id.
+  /// Takes a String [id] as input. It searches the `gameList` for a session
+  /// with a matching id and returns it if found.
+  /// If no session is found, it returns null.
+  GameSession? getGameSessionById(String id) {
+    return gameList.firstWhereOrNull((session) => session.id == id);
+  }
+
+  /// Removes a game session from the list and sorts it by creation date.
+  /// Takes a [index] as input. It then removes the session at the specified index from the `gameList`,
+  /// sorts the list in descending order based on the creation date, and notifies listeners of the change.
+  /// It also saves the updated game sessions to local storage.
+  void removeGameSessionByIndex(int index) {
+    gameList[index].removeListener(notifyListeners);
+    gameList.removeAt(index);
+    notifyListeners();
+    LocalStorageService.saveGameSessions();
+  }
+
+  /// Removes a game session by its ID.
+  /// Takes a String [id] as input. It finds the index of the game session with the matching ID
+  /// in the `gameList`, and then calls `removeGameSessionByIndex` with that index.
+  void removeGameSessionById(String id) {
+    final int index =
+        gameList.indexWhere((session) => session.id.toString() == id);
+    if (index == -1) return;
+    removeGameSessionByIndex(index);
+  }
+
+  /// Retrieves a game session by its ID.
+  /// Takes a String [id] as input. It finds the game session with the matching id
+  bool gameExistsInGameList(String id) {
+    return gameList.any((session) => session.id.toString() == id);
+  }
+
+  /// Ends a game session if its in unlimited mode.
+  /// Takes a String [id] as input. It finds the index of the game
+  /// session with the matching ID marks it as finished,
+  void endGame(String id) {
+    final int index =
+        gameList.indexWhere((session) => session.id.toString() == id);
+
+    // Game session not found or not in unlimited mode
+    if (index == -1 || gameList[index].isPointsLimitEnabled == true) return;
+
+    gameList[index].roundNumber--;
+    gameList[index].isGameFinished = true;
+    gameList[index].setWinner();
+    notifyListeners();
+    LocalStorageService.saveGameSessions();
+  }
+}
+
+final gameManager = GameManager();