From e889709a91e07d9c44365253d80a2746369a8831 Mon Sep 17 00:00:00 2001
From: Zenny <zenayi@gmail.com>
Date: Tue, 9 Jun 2026 01:39:00 -0700
Subject: [PATCH] Add Key Item tag and restrict it from being
 used/thrown/dropped

---
 Zennysoft.Game.Ma.Implementation/Equipment/Tags/ItemTag.cs | 3 ++-
 Zennysoft.Game.Ma/src/game/Game.cs                         | 4 ++--
 Zennysoft.Game.Ma/src/items/EffectService.cs               | 4 ++--
 Zennysoft.Game.Ma/src/ui/inventory_menu/InventoryMenu.cs   | 2 +-
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/Zennysoft.Game.Ma.Implementation/Equipment/Tags/ItemTag.cs b/Zennysoft.Game.Ma.Implementation/Equipment/Tags/ItemTag.cs
index 8eedab7f..5266a15c 100644
--- a/Zennysoft.Game.Ma.Implementation/Equipment/Tags/ItemTag.cs
+++ b/Zennysoft.Game.Ma.Implementation/Equipment/Tags/ItemTag.cs
@@ -23,5 +23,6 @@ public enum ItemTag
   UseAllItems,
   GlueOnEquip,
   BreaksOnUnequip,
-  ContainsJewel
+  ContainsJewel,
+  KeyItem
 }
\ No newline at end of file
diff --git a/Zennysoft.Game.Ma/src/game/Game.cs b/Zennysoft.Game.Ma/src/game/Game.cs
index ba318052..18a98717 100644
--- a/Zennysoft.Game.Ma/src/game/Game.cs
+++ b/Zennysoft.Game.Ma/src/game/Game.cs
@@ -556,7 +556,7 @@ public partial class Game : Node3D, IGame
         InventoryEventNotification.Invoke($"{boxItem.ItemName} contained {rareItem.ItemName} but cost dear life.");
         break;
       case ItemTag.TradeOneRandomItem:
-        var itemsWithoutBox = _player.Inventory.Items.Where(x => x != boxItem).ToList();
+        var itemsWithoutBox = _player.Inventory.Items.Where(x => x != boxItem).Where(x => x.ItemTag != ItemTag.KeyItem).ToList();
         var rng = new RandomNumberGenerator();
         rng.Randomize();
         var index = rng.RandiRange(0, itemsWithoutBox.Count - 1);
@@ -603,7 +603,7 @@ public partial class Game : Node3D, IGame
 
         _player.Inventory.Items.Remove(boxItem);
         GameRepo.CloseInventory();
-        var itemsToThrow = _player.Inventory.Items.ToList();
+        var itemsToThrow = _player.Inventory.Items.Where(x => x.ItemTag != ItemTag.KeyItem).ToList();
         _player.Inventory.Items.Clear();
         double[] throwAngles = [0, -5, 5, -15, -25, 25];
         var throwIndex = 0;
diff --git a/Zennysoft.Game.Ma/src/items/EffectService.cs b/Zennysoft.Game.Ma/src/items/EffectService.cs
index 119cc49d..166ae3bb 100644
--- a/Zennysoft.Game.Ma/src/items/EffectService.cs
+++ b/Zennysoft.Game.Ma/src/items/EffectService.cs
@@ -355,7 +355,7 @@ public class EffectService
   public void TradeRandomItem<T>(BoxItem box)
     where T : IBaseInventoryItem
   {
-    var tradableItems = _player.Inventory.Items.OfType<T>().ToList();
+    var tradableItems = _player.Inventory.Items.OfType<T>().Where(x => x.ItemTag != ItemTag.KeyItem).ToList();
     var rng = new RandomNumberGenerator();
     rng.Randomize();
     var randomIndex = rng.RandiRange(0, tradableItems.Count - 1);
@@ -370,7 +370,7 @@ public class EffectService
   public IEnumerable<IBaseInventoryItem> TradeAllRandomItems(BoxItem box)
   {
     var newInventory = new List<IBaseInventoryItem>();
-    var items = _player.Inventory.Items.ToList();
+    var items = _player.Inventory.Items.Where(x => x.ItemTag != ItemTag.KeyItem).ToList();
     foreach (var item in items)
       newInventory.Add(GetRandomItemOfType<IBaseInventoryItem>());
 
diff --git a/Zennysoft.Game.Ma/src/ui/inventory_menu/InventoryMenu.cs b/Zennysoft.Game.Ma/src/ui/inventory_menu/InventoryMenu.cs
index 6022c3f4..d95e83c1 100644
--- a/Zennysoft.Game.Ma/src/ui/inventory_menu/InventoryMenu.cs
+++ b/Zennysoft.Game.Ma/src/ui/inventory_menu/InventoryMenu.cs
@@ -134,7 +134,7 @@ public partial class InventoryMenu : Control, IInventoryMenu
 
   private void ItemPressed(IItemSlot selectedItem)
   {
-    if (_blocking)
+    if (_blocking || selectedItem.Item.Value.ItemTag == ItemTag.KeyItem)
       return;
 
     SetProcessInput(false);