fixed a bug in stacksize same version

MosswartMassacre/Utils.cs

@@ -3,6 +3,7 @@ using Decal.Adapter;
 using Decal.Adapter.Wrappers;
 using System.Numerics;
 using Mag.Shared.Constants;
+using System.Linq;
 
 namespace MosswartMassacre
 {
@@ -87,14 +88,15 @@ namespace MosswartMassacre
         {
             try
             {
-                var worldFilter = CoreManager.Current.WorldFilter;
+                //var worldFilter = CoreManager.Current.WorldFilter;
-                var playerInv = CoreManager.Current.CharacterFilter.Id;
+                //var playerInv = CoreManager.Current.CharacterFilter.Id;
 
                 // Search inventory
-                foreach (WorldObject item in worldFilter.GetByContainer(playerInv))
+              
+                foreach (WorldObject wo in CoreManager.Current.WorldFilter.GetInventory())
                 {
-                    if (string.Equals(item.Name, itemName, StringComparison.OrdinalIgnoreCase))
+                    if (string.Equals(wo.Name, itemName, StringComparison.OrdinalIgnoreCase))
-                        return item;
+                        return wo;
                 }
                 
                 return null;
@@ -110,12 +112,35 @@ namespace MosswartMassacre
         /// </summary>
         /// <param name="itemName">Name of the item to find</param>
         /// <returns>Stack size or 0 if not found</returns>
+        /// <summary>
+        /// Return the total quantity of an item in the character’s inventory,
+        /// adding up every stack that shares <paramref name="itemName"/>.
+        /// </summary>
         public static int GetItemStackSize(string itemName)
         {
             try
             {
-                var item = FindItemByName(itemName);
+                // 1. Pull every WorldObject in bags + containers
-                return item?.Values(LongValueKey.StackCount) ?? 0;
+                var inv = CoreManager.Current.WorldFilter.GetInventory();
+
+                // 2. Keep only those whose display name matches (case-insensitive)
+                // 3. For each one, use StackCount if it exists, otherwise treat as 1
+                return inv.Where(wo =>
+                            string.Equals(wo.Name, itemName,
+                                          StringComparison.OrdinalIgnoreCase))
+                          .Sum(wo =>
+                          {
+                              // Some items (weapons, armor) aren’t stackable;
+                              // Values(LongValueKey.StackCount) throws if the key is absent.
+                              try
+                              {
+                                  return wo.Values(LongValueKey.StackCount);
+                              }
+                              catch
+                              {
+                                  return 1;   // non-stackable item = quantity 1
+                              }
+                          });
             }
             catch
             {
@@ -123,6 +148,7 @@ namespace MosswartMassacre
             }
         }
 
+
         /// <summary>
         /// Get the icon ID of a specific item by name
         /// </summary>