fix ItemAdded event call in Player::AddItem

Exiled.API/Extensions/ReflectionExtensions.cs

@@ -10,6 +10,8 @@ namespace Exiled.API.Extensions
     using System;
     using System.Reflection;
 
+    using HarmonyLib;
+
     using LiteNetLib.Utils;
 
     /// <summary>
@@ -18,7 +20,7 @@ namespace Exiled.API.Extensions
     public static class ReflectionExtensions
     {
         /// <summary>
-        /// Invoke a static method.
+        /// Invokes a static method.
         /// </summary>
         /// <param name="type">The method type.</param>
         /// <param name="methodName">The method name.</param>
@@ -30,6 +32,24 @@ public static void InvokeStaticMethod(this Type type, string methodName, object[
             type.GetMethod(methodName, flags)?.Invoke(null, param);
         }
 
+        /// <summary>
+        /// Invokes a static event.
+        /// </summary>
+        /// <param name="type">The event type.</param>
+        /// <param name="eventName">The event name.</param>
+        /// <param name="param">The event arguments.</param>
+        public static void InvokeStaticEvent(this Type type, string eventName, object[] param)
+        {
+            var eventDelegate = (MulticastDelegate)type.GetField(eventName, AccessTools.all).GetValue(null);
+            if (eventDelegate != null)
+            {
+                foreach (var handler in eventDelegate.GetInvocationList())
+                {
+                    handler.Method.Invoke(handler.Target, param);
+                }
+            }
+        }
+
         /// <summary>
         /// Copy all properties from the source class to the target one.
         /// </summary>

Exiled.API/Features/Player.cs

@@ -2552,6 +2552,8 @@ public Item AddItem(ItemBase itemBase, Item item = null)
                     acquisitionConfirmationTrigger.AcquisitionAlreadyReceived = false;
                 }
 
+                typeof(InventoryExtensions).InvokeStaticEvent(nameof(InventoryExtensions.OnItemAdded), new object[] { ReferenceHub, itemBase, null });
+
                 ItemsValue.Add(item);
 
                 Inventory.SendItemsNextFrame = true;