Implemented Save and Load functionality

scripts/CSharp/GameEntity/Management/EntityManager.cs

@@ -1,6 +1,9 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
+using Babushka.scripts.CSharp.GameEntity.Entities;
 using Godot;
+using Newtonsoft.Json.Linq;
 using Entity = Babushka.scripts.CSharp.GameEntity.Entities.Entity;
 using PositionalEntity = Babushka.scripts.CSharp.GameEntity.Entities.PositionalEntity;
 
@@ -15,6 +18,7 @@ public partial class EntityManager : Node
     public static EntityManager Instance;
     
     [Export] private EntityNodeCreator _nodeCreator = null!;
+    [Export] private string saveDirectory = "user://save_data/";
     
     private EntitySceneContainer? _currentEntitySceneContainer;
     private readonly List<Entity> _allEntities = new();
@@ -27,6 +31,7 @@ public partial class EntityManager : Node
     public override void _EnterTree()
     {
         Instance = this;
+        Load();
     }
 
     public override void _Input(InputEvent @event)
@@ -40,6 +45,58 @@ public partial class EntityManager : Node
                 GD.Print(entity.EntityType + " " + entity.id);
             }
         }
+        
+        if(@event.IsActionPressed("SaveGame")) Save();
+    }
+
+    public void Save()
+    {
+        JArray array = new JArray();
+        foreach (var entity in AllEntities)
+        {
+            JObject saveData = new JObject();
+            entity.SaveEntity(saveData);
+            array.Add(saveData);
+        }
+        
+        using var SaveFile = FileAccess.Open(saveDirectory + "save.json", FileAccess.ModeFlags.Write);
+        SaveFile.StoreString(array.ToString());
+    }
+    
+    public void Load()
+    {
+        using var saveFile = FileAccess.Open(saveDirectory + "save.json", FileAccess.ModeFlags.Read);
+        if (saveFile == null) return;
+        
+        JArray array = JArray.Parse(saveFile.GetAsText());
+
+        foreach (var token in array)
+        {
+            var jobj = (JObject)token;
+
+            if (jobj == null) continue;
+
+            if (jobj.TryGetValue("type", out var entityType))
+            {
+                string entityTypeString = (string) entityType!;
+                Entity entity = InitializeEntity(entityTypeString);
+                entity.LoadEntity(jobj);
+                AddEntity(entity);
+                
+            }
+        }
+    }
+
+    private Entity InitializeEntity(string type)
+    {
+        Entity entity = type switch
+        {
+            TrashEntity.OWN_TYPE_NAME => new TrashEntity(),
+            LoadedScenesEntity.OWN_TYPE_NAME => new LoadedScenesEntity(),
+            _ => throw new Exception($"Trying to load unknown entity type: {type}")
+        };
+
+        return entity;
     }
     
     #region ENTITY MANAGEMENT

scripts/CSharp/GameEntity/Management/EntitySceneContainer.cs

@@ -16,14 +16,20 @@ public partial class EntitySceneContainer : Node2D
 
     public override void _ExitTree()
     {
+        EntityManager.Instance.Save();
         EntityManager.Instance.UnsetSceneContainer();
-        var loadedScenesEntity = EntityManager.Instance.GetUniqueEntity<LoadedScenesEntity>();
-        loadedScenesEntity.AddScene(sceneName);
     }
 
     public override void _Ready()
     {
         AddAllEntities();
+        CallDeferred(nameof(RegisterWithScenesEntity));
+    }
+
+    private void RegisterWithScenesEntity()
+    {
+        var loadedScenesEntity = EntityManager.Instance.GetUniqueEntity<LoadedScenesEntity>();
+        loadedScenesEntity.AddScene(sceneName);
     }
 
     public void AddAllEntities()