From 3ddb7d7070833e17e3463e4d833f1368ddc2ee7b Mon Sep 17 00:00:00 2001
From: pyro7r34d <pyro7r34d@gmail.com>
Date: Thu, 26 Feb 2026 16:28:41 -0500
Subject: [PATCH] Add On Barter Add Item

First Draft -- not complete
#858
---
 .../Native/BarterEvents/OnBarterAddItem.cs    | 80 +++++++++++++++++++
 .../Native/Functions/Functions.CNWSBarter.cs  |  5 ++
 2 files changed, 85 insertions(+)
 create mode 100644 NWN.Anvil/src/main/API/Events/Native/BarterEvents/OnBarterAddItem.cs

diff --git a/NWN.Anvil/src/main/API/Events/Native/BarterEvents/OnBarterAddItem.cs b/NWN.Anvil/src/main/API/Events/Native/BarterEvents/OnBarterAddItem.cs
new file mode 100644
index 000000000..79155b6d3
--- /dev/null
+++ b/NWN.Anvil/src/main/API/Events/Native/BarterEvents/OnBarterAddItem.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Runtime.InteropServices;
+using Anvil.API.Events;
+using Anvil.Native;
+using Anvil.Services;
+using NWN.Native.API;
+
+namespace Anvil.API.Events
+{
+  public sealed class OnBarterBarterAddItem : IEvent
+  {
+    public NwPlayer BarterTarget { get; private init; } = null!;
+    public NwPlayer Initiator { get; private init; } = null!;
+
+    public NwItem Item { get; private init; } = null!;
+
+    /// <summary>
+    /// Gets or sets if the AddItem trigger event should be skipped.
+    /// </summary>
+    public bool Skip { get; set; }
+
+    NwObject IEvent.Context => Item;
+
+    public sealed unsafe class Factory : HookEventFactory
+    {
+      private static FunctionHook<Functions.CNWSBarter.BarterAddItem> Hook { get; set; } = null!;
+
+      protected override IDisposable[] RequestHooks()
+      {
+        delegate* unmanaged<void*, void**, uint> pHook = &OnBarterBarterAddItem;
+        Hook = HookService.RequestHook<Functions.CNWSBarter.BarterAddItem>(pHook, HookOrder.Early);
+        return [Hook];
+
+      }
+
+      [UnmanagedCallersOnly]
+      private static void OnBarterBarterAddItem(void* pInitiator, void* pTargetPlayer, uint oidItem)
+      {
+        OnBarterBarterAddItem eventData = new OnBarterBarterAddItem
+        {
+          Initiator = CNWSPlayer.FromPointer(pInitiator).ToNwPlayer()!,
+          BarterTarget = CNWSPlayer.FromPointer(pTargetPlayer).ToNwPlayer()!,
+          Item = oidItem.ToNwObject<NwItem>()!,
+        };
+
+        if (!eventData.Skip)
+        {
+          Hook.CallOriginal(pInitiator, pTargetPlayer, oidItem);
+        }
+        else
+        {
+          ProcessEvent(EventCallbackType.After, eventData);
+        }
+      }
+    }
+  }
+}
+
+namespace Anvil.API
+{
+  public sealed partial class NwPlayer
+  {
+    /// <inheritdoc cref="Events.OnBarterBarterAddItem"/>
+    public event Action<OnBarterBarterAddItem> OnBarterBarterAddItem
+    {
+      add => EventService.Subscribe<OnBarterBarterAddItem, OnBarterBarterAddItem.Factory>(ControlledCreature, value);
+      remove => EventService.Unsubscribe<OnBarterBarterAddItem, OnBarterBarterAddItem.Factory>(ControlledCreature, value);
+    }
+  }
+
+  public sealed partial class NwModule
+  {
+    /// <inheritdoc cref="Events.OnBarterBarterAddItem"/>
+    public event Action<OnBarterBarterAddItem> OnBarterBarterAddItem
+    {
+      add => EventService.SubscribeAll<OnBarterBarterAddItem, OnBarterBarterAddItem.Factory>(value);
+      remove => EventService.UnsubscribeAll<OnBarterBarterAddItem, OnBarterBarterAddItem.Factory>(value);
+    }
+  }
+}
diff --git a/NWN.Anvil/src/main/Native/Functions/Functions.CNWSBarter.cs b/NWN.Anvil/src/main/Native/Functions/Functions.CNWSBarter.cs
index 1e2bda0db..c0fbf14ed 100644
--- a/NWN.Anvil/src/main/Native/Functions/Functions.CNWSBarter.cs
+++ b/NWN.Anvil/src/main/Native/Functions/Functions.CNWSBarter.cs
@@ -9,6 +9,11 @@ public static class CNWSBarter
     {
       [NativeFunction("_ZN10CNWSBarter15SetListAcceptedEi", "?SetListAccepted@CNWSBarter@@QEAAHH@Z")]
       public delegate int SetListAccepted(void* pBarter, int bAccepted);
+
+      [NativeFunction("_ZN11CNWSMessage34HandlePlayerToServerBarter_AddItemEP10CNWSPlayer", )]
+      public delegate void AddItem(void* pInitiator, void* pTargetPlayer, uint oidItem);
     }
   }
 }
+
+