first add of the event

EXILED/Exiled.Events/EventArgs/Item/DisruptorFiringEventArgs.cs

@@ -0,0 +1,55 @@
+// ----------------DissolveMatPool-------------------------------------------------------
+// <copyright file="DisruptorFiringEventArgs.cs" company="ExMod Team">
+// Copyright (c) ExMod Team. All rights reserved.
+// Licensed under the CC BY-SA 3.0 license.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Exiled.Events.EventArgs.Item
+{
+    using Exiled.API.Features.Pickups;
+    using Interfaces;
+    using InventorySystem.Items.Firearms.Modules;
+    using InventorySystem.Items.Pickups;
+
+    /// <summary>
+    /// Contains all information before a pickup <see cref="ItemType.ParticleDisruptor"/> shoot while on the ground.
+    /// </summary>
+    public class DisruptorFiringEventArgs : IDeniableEvent, IPickupEvent
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DisruptorFiringEventArgs"/> class.
+        /// </summary>
+        /// <param name="disruptor"><inheritdoc cref="Pickup"/></param>
+        /// <param name="attacker"><inheritdoc cref="Attacker"/></param>
+        /// <param name="state"><inheritdoc cref="State"/></param>
+        /// <param name="isAllowed"><inheritdoc cref="IsAllowed"/></param>
+        public DisruptorFiringEventArgs(Pickup disruptor, API.Features.Player attacker, DisruptorActionModule.FiringState state, bool isAllowed = true)
+        {
+            Pickup = disruptor;
+            Attacker = attacker;
+            State = state;
+            IsAllowed = isAllowed;
+        }
+
+        /// <summary>
+        /// Gets or Sets a value indicating whether the disruptor shoot and the ground. Still play the sound on client and remove a bullet.
+        /// </summary>
+        public bool IsAllowed { get; set; }
+
+        /// <summary>
+        /// Gets or Sets whether is the attacker.
+        /// </summary>
+        public API.Features.Player Attacker { get; set; }
+
+        /// <summary>
+        /// Gets the state of the weapon.
+        /// </summary>
+        public DisruptorActionModule.FiringState State { get; }
+
+        /// <summary>
+        /// Gets the pickup who shot the bullet.
+        /// </summary>
+        public Pickup Pickup { get; }
+    }
+}

EXILED/Exiled.Events/Handlers/Item.cs

@@ -54,10 +54,22 @@ public static class Item
         public static Event<UsingRadioPickupBatteryEventArgs> UsingRadioPickupBattery { get; set; } = new();
 
         /// <summary>
-        /// Invoked before a<see cref="API.Features.Pickups.MicroHIDPickup"/> state is changed.
+        /// Invoked before a <see cref="API.Features.Pickups.MicroHIDPickup"/> state is changed.
         /// </summary>
         public static Event<ChangingMicroHIDPickupStateEventArgs> ChangingMicroHIDPickupState { get; set; } = new();
 
+        /// <summary>
+        /// Invoked before a <see cref="ItemType.ParticleDisruptor"/> firing while on the ground.
+        /// </summary>
+        public static Event<DisruptorFiringEventArgs> DisruptorFiring { get; set; } = new();
+
+        /// <summary>
+        /// Called before a <see cref="ItemType.ParticleDisruptor"/> firing while on the ground.
+        /// WARNING: Client still receive the shoot sound AND the ammo is still removed. (even if <see cref="DisruptorFiringEventArgs.IsAllowed"/> = false).
+        /// </summary>
+        /// <param name="ev">The <see cref="DisruptorFiringEventArgs"/> instance.</param>
+        public static void OnDisruptorFiring(DisruptorFiringEventArgs ev) => DisruptorFiring.InvokeSafely(ev);
+
         /// <summary>
         /// Called before the ammo of an firearm is changed.
         /// </summary>

EXILED/Exiled.Events/Patches/Events/Item/DisruptorFiring.cs

@@ -0,0 +1,89 @@
+// -----------------------------------------------------------------------
+// <copyright file="DisruptorFiring.cs" company="ExMod Team">
+// Copyright (c) ExMod Team. All rights reserved.
+// Licensed under the CC BY-SA 3.0 license.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Exiled.Events.Patches.Events.Item
+{
+    using System.Collections.Generic;
+    using System.Reflection.Emit;
+
+    using Exiled.API.Features;
+    using Exiled.API.Features.Pickups;
+    using Exiled.API.Features.Pools;
+    using Exiled.Events.Attributes;
+    using Exiled.Events.EventArgs.Item;
+    using Footprinting;
+    using HarmonyLib;
+    using InventorySystem.Items;
+    using InventorySystem.Items.Firearms;
+    using InventorySystem.Items.Firearms.Extensions;
+    using InventorySystem.Items.Firearms.Modules;
+
+    using static HarmonyLib.AccessTools;
+
+    /// <summary>
+    /// Patches <see cref="DisruptorWorldmodelActionExtension.ServerFire"/>. Adds the <see cref="DisruptorFiring"/> event.
+    /// </summary>
+    [EventPatch(typeof(Handlers.Item), nameof(Handlers.Item.DisruptorFiring))]
+    [HarmonyPatch(typeof(DisruptorWorldmodelActionExtension), nameof(DisruptorWorldmodelActionExtension.ServerFire))]
+    public class DisruptorFiring
+    {
+        private static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions, ILGenerator generator)
+        {
+            List<CodeInstruction> newInstructions = ListPool<CodeInstruction>.Pool.Get(instructions);
+
+            LocalBuilder ev = generator.DeclareLocal(typeof(DisruptorFiringEventArgs));
+            Label continueLabel = generator.DefineLabel();
+            newInstructions.InsertRange(0, new CodeInstruction[]
+            {
+                // Pickup.Get(this._worldmodel.Identifier.SerialNumber)
+                new(OpCodes.Ldarg_0),
+                new(OpCodes.Ldfld, Field(typeof(DisruptorWorldmodelActionExtension), nameof(DisruptorWorldmodelActionExtension._worldmodel))),
+                new(OpCodes.Callvirt, PropertyGetter(typeof(FirearmWorldmodel), nameof(FirearmWorldmodel.Identifier))),
+                new(OpCodes.Ldfld, Field(typeof(ItemIdentifier), nameof(ItemIdentifier.SerialNumber))),
+                new(OpCodes.Call, Method(typeof(Pickup), nameof(Pickup.Get), new[] { typeof(ushort) })),
+
+                // Player.Get(this._scheduledAttackerFootprint)
+                new(OpCodes.Ldarg_0),
+                new(OpCodes.Ldfld, Field(typeof(DisruptorWorldmodelActionExtension), nameof(DisruptorWorldmodelActionExtension._scheduledAttackerFootprint))),
+                new(OpCodes.Call, Method(typeof(API.Features.Player), nameof(API.Features.Player.Get), new[] { typeof(Footprint) })),
+
+                // this._scheduledFiringState
+                new(OpCodes.Ldarg_0),
+                new(OpCodes.Ldfld, Field(typeof(DisruptorWorldmodelActionExtension), nameof(DisruptorWorldmodelActionExtension._scheduledFiringState))),
+
+                // true
+                new(OpCodes.Ldc_I4_0),
+
+                // DisruptorFiringEventArgs ev = new DisruptorFiringEventArgs(Pickup.Get(this._worldmodel.Identifier.SerialNumber), Player.Get(this._scheduledAttackerFootprint), this._scheduledFiringState, true)
+                new(OpCodes.Newobj, GetDeclaredConstructors(typeof(DisruptorFiringEventArgs))[0]),
+                new(OpCodes.Stloc_S, ev.LocalIndex),
+
+                // Handlers.Item.OnDisruptorFiring(ev);
+                new(OpCodes.Ldloc_S, ev.LocalIndex),
+                new(OpCodes.Call, Method(typeof(Handlers.Item), nameof(Handlers.Item.OnDisruptorFiring))),
+
+                // if (!ev.IsAllowed) return;
+                new(OpCodes.Ldloc_S, ev.LocalIndex),
+                new (OpCodes.Callvirt, PropertyGetter(typeof(DisruptorFiringEventArgs), nameof(DisruptorFiringEventArgs.IsAllowed))),
+                new(OpCodes.Brtrue_S, continueLabel),
+                new(OpCodes.Ret),
+
+                // this._scheduledAttackerFootprint = Attacker.Footprint;
+                new CodeInstruction(OpCodes.Ldloc_S, ev.LocalIndex).WithLabels(continueLabel),
+                new(OpCodes.Ldarg_0),
+                new(OpCodes.Callvirt, PropertyGetter(typeof(DisruptorFiringEventArgs), nameof(DisruptorFiringEventArgs.Attacker))),
+                new(OpCodes.Callvirt, PropertyGetter(typeof(API.Features.Player), nameof(API.Features.Player.Footprint))),
+                new(OpCodes.Stfld, Field(typeof(DisruptorWorldmodelActionExtension), nameof(DisruptorWorldmodelActionExtension._scheduledAttackerFootprint))),
+            });
+
+            for (int z = 0; z < newInstructions.Count; z++)
+                yield return newInstructions[z];
+
+            ListPool<CodeInstruction>.Pool.Return(newInstructions);
+        }
+    }
+}