Implement core game functionality with AppRoot, SaveClient, PlayerRepository, and LevelRepository classes

game/services/SaveService.cs

@@ -0,0 +1,32 @@
+using Mr.BrickAdventures.data;
+using Mr.BrickAdventures.game.repositories;
+
+namespace Mr.BrickAdventures.game.services;
+
+public sealed class SaveService
+{
+    private readonly PlayerRepository _players;
+    private readonly LevelRepository _levels;
+    private readonly SaveClient _save;
+    
+    public SaveService(PlayerRepository players, LevelRepository levels, SaveClient save) {
+        _players = players; _levels = levels; _save = save;
+    }
+    
+    
+    public bool TryLoad() {
+        if (!_save.TryLoad(out var p, out var l)) return false;
+        _players.Load(p);
+        _levels.Load(l);
+        return true;
+    }
+
+    public void Save() => _save.Save(_players.Export(), _levels.Export());
+    public bool Exists() => _save.Exists();
+
+    public void NewGame() {
+        _players.Load(new PlayerState { Coins = 0, Lives = 3 });
+        _levels.Load(new LevelState { Current = 0, Unlocked = [0], Completed = [] });
+        Save();
+    }
+}