✨ added saving and loading support to collectable inventory items

scripts/CSharp/Common/Inventory/ItemOnGround2D.cs

@@ -63,6 +63,8 @@ public partial class ItemOnGround2D : Node, ISaveable
             {
                 QueueFree();
             }
+
+            UpdateSaveData();
         }
     }
 
@@ -92,7 +94,14 @@ public partial class ItemOnGround2D : Node, ISaveable
 
     public void UpdateSaveData()
     {
-        // do nothing?
+        var payloadData = new Dictionary<string, Variant>
+        {
+            {"pickupCounter",  pickUpCounter}
+        };
+        
+        string id = GetMeta("SaveID").AsString();
+        GD.Print($"Updating Save ID for object {Name}: {id}");
+        SavegameService.AppendDataToSave( id, payloadData);
     }
 
     public void LoadFromSaveData()
@@ -100,6 +109,26 @@ public partial class ItemOnGround2D : Node, ISaveable
         if (_infiniteSupply)
             return;
         
+        // standard check: how many times has this item been collected?
+        string id = GetMeta("SaveID").AsString(); 
+        GD.Print($"Loading Save ID for object {Name}: " + id);
+        
+        Dictionary<string, Variant> save = SavegameService.GetSaveData(id);
+        if (save.Count > 0)
+        {
+            if(save.TryGetValue("pickupCounter", out Variant countVar))
+            {
+                int count = countVar.AsInt32();
+                GD.Print($"Item count for {Name}: {count}");
+                for (int i = 0; i < count; i++)
+                {
+                    Pickup();
+                    GD.Print($"Picking up {Name}: {i}");
+                }
+            }
+        }
+        
+        //separate check for unique items: If already in inventory, delete this instance.
         ItemResource itemResource = itemInstance.blueprint;
         Dictionary<string, Variant> savegameData = SavegameService.GetSaveData(InventoryInstance.ID);
         if (savegameData.Count > 0)
@@ -121,7 +150,6 @@ public partial class ItemOnGround2D : Node, ISaveable
                         }
                     }
                 }
-                
             }
         }
     }