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NitroxPatcher/Patches/Dynamic/WaterParkCreature_ManagedUpdate_Patch.cs

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+using System.Collections.Generic;
+using System.Reflection;
+using System.Reflection.Emit;
+using HarmonyLib;
+using NitroxClient.Communication.Abstract;
+using NitroxClient.GameLogic;
+using NitroxModel.DataStructures;
+using NitroxModel.Helper;
+using NitroxModel.Packets;
+
+namespace NitroxPatcher.Patches.Dynamic;
+
+/// <summary>
+/// Syncs fish deletion once it ages to adult state.
+/// </summary>
+public sealed partial class WaterParkCreature_ManagedUpdate_Patch : NitroxPatch, IDynamicPatch
+{
+    public static readonly MethodInfo TARGET_METHOD = Reflect.Method((WaterParkCreature t) => t.ManagedUpdate());
+
+    /*
+     * MODIFIED:
+     * WaterParkCreature.Born(adultPrefab, this.currentWaterPark, base.transform.position);
+     * base.SetWaterPark(null);
+     * WaterParkCreature_ManagedUpdate_Patch.CreatureDestroyedCallback(this); <--- INSERTED
+     * UnityEngine.Object.Destroy(base.gameObject);
+     */
+    public static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions)
+    {
+        return new CodeMatcher(instructions).MatchEndForward([
+                                                new CodeMatch(OpCodes.Ldarg_0),
+                                                new CodeMatch(OpCodes.Ldnull),
+                                                new CodeMatch(OpCodes.Call, Reflect.Method((WaterParkItem t) => t.SetWaterPark(default))),
+                                            ])
+                                            .Advance(1)
+                                            .InsertAndAdvance([
+                                                new CodeInstruction(OpCodes.Ldarg_0),
+                                                new CodeInstruction(OpCodes.Call, Reflect.Method(() => CreatureDestroyedCallback(default)))
+                                            ])
+                                            .InstructionEnumeration();
+    }
+
+    public static void CreatureDestroyedCallback(WaterParkCreature waterParkCreature)
+    {
+        // We don't manage eggs with no id here
+        if (!waterParkCreature.TryGetNitroxId(out NitroxId creatureId))
+        {
+            return;
+        }
+
+        // It is VERY IMPORTANT to check for simulation ownership on the water park and not on the egg
+        // since that's the convention we chose
+        if (waterParkCreature.currentWaterPark.TryGetNitroxId(out NitroxId waterParkId) &&
+            Resolve<SimulationOwnership>().HasAnyLockType(waterParkId))
+        {
+            Resolve<IPacketSender>().Send(new EntityDestroyed(creatureId));
+        }
+    }
+}