first commit

NitroxPatcher/Patches/Dynamic/ItemsContainer_DestroyItem_Patch.cs

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+using System.Collections.Generic;
+using System.Reflection;
+using HarmonyLib;
+using NitroxClient.Communication.Abstract;
+using NitroxModel.DataStructures;
+using NitroxModel.Helper;
+using NitroxModel.Packets;
+using NitroxPatcher.PatternMatching;
+using static System.Reflection.Emit.OpCodes;
+
+namespace NitroxPatcher.Patches.Dynamic;
+
+/// <summary>
+/// When the player crafts items the game will leverage this API to select a pickupable
+/// from their inventory and delete it.  We want to let the server know that the item
+/// was successfully deleted.
+/// </summary>
+public sealed partial class ItemsContainer_DestroyItem_Patch : NitroxPatch, IDynamicPatch
+{
+    internal static readonly MethodInfo TARGET_METHOD = Reflect.Method((ItemsContainer t) => t.DestroyItem(default(TechType)));
+
+    private static readonly InstructionsPattern removeItemPattern = new()
+    {
+        Ldarg_0,
+        Ldarg_1,
+        Reflect.Method((ItemsContainer container) => container.RemoveItem(default(TechType))),
+        { Stloc_0, "NotifyServer" }
+    };
+
+    public static IEnumerable<CodeInstruction> Transpiler(MethodBase original, IEnumerable<CodeInstruction> instructions)
+    {
+        // After the call to RemoveItem (and storing the return value) we want to call our callback method
+        return instructions.InsertAfterMarker(removeItemPattern, "NotifyServer", new CodeInstruction[]
+        {
+            new(Ldloc_0),
+            new(Call, Reflect.Method(() => Callback(default)))
+        });
+    }
+
+    private static void Callback(Pickupable pickupable)
+    {
+        if (pickupable.TryGetIdOrWarn(out NitroxId id))
+        {
+            Resolve<IPacketSender>().Send(new EntityDestroyed(id));
+        }
+    }
+}