OnBookmarkControl

using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using Oxide.Core;
using UnityEngine;

namespace Oxide.Plugins
{
    [Info("Bookmark Turret Lock", "RustPluginGenerator", "1.0.0")]
    [Description("Blocks computer station bookmark control of turrets owned by other players or teams.")]
    public class BookmarkTurretLock : RustPlugin
    {
        private const string PermBypass = "bookmarkturretlock.bypass";

        private PluginConfig config;

        public class PluginConfig
        {
            [JsonProperty("Block only player turrets (skip NPC samsites and turrets)")]
            public bool PlayerTurretsOnly { get; set; } = true;

            [JsonProperty("Allow players authorised on building privilege")]
            public bool AllowAuthed { get; set; } = true;
        }

        protected override void LoadDefaultConfig() => config = new PluginConfig();

        protected override void LoadConfig()
        {
            base.LoadConfig();
            try
            {
                config = Config.ReadObject<PluginConfig>();
                if (config == null) throw new Exception();
            }
            catch
            {
                PrintWarning("Configuration file is invalid, using defaults");
                LoadDefaultConfig();
            }
            SaveConfig();
        }

        protected override void SaveConfig() => Config.WriteObject(config);

        protected override void LoadDefaultMessages()
        {
            lang.RegisterMessages(new Dictionary<string, string>
            {
                ["Denied"] = "You cannot control this turret through this computer station."
            }, this);
        }

        private void Init()
        {
            permission.RegisterPermission(PermBypass, this);
        }

        private string Msg(string key, string userId = null) => lang.GetMessage(key, this, userId);

        private object OnBookmarkControl(ComputerStation computerStation, BasePlayer player, string text, IRemoteControllable remoteControllable)
        {
            if (player == null || remoteControllable == null) return null;
            if (permission.UserHasPermission(player.UserIDString, PermBypass)) return null;

            BaseEntity entity = remoteControllable.GetEnt();
            if (entity == null) return null;

            var turret = entity as AutoTurret;
            var samSite = entity as SamSite;
            if (turret == null && samSite == null) return null;

            ulong ownerId = turret != null ? turret.OwnerID : samSite.OwnerID;
            if (config.PlayerTurretsOnly && (ownerId == 0uL || ownerId >= 76561197960265728uL == false)) return null;

            if (IsAllowed(player, ownerId, entity)) return null;

            player.ChatMessage(Msg("Denied", player.UserIDString));
            return false;
        }

        private bool IsAllowed(BasePlayer player, ulong ownerId, BaseEntity entity)
        {
            if (ownerId == player.userID.Get()) return true;

            if (ownerId != 0uL)
            {
                BasePlayer owner = BasePlayer.FindByID(ownerId);
                if (owner != null && player.currentTeam != 0 && player.currentTeam == owner.currentTeam) return true;
            }

            if (!config.AllowAuthed) return false;

            BuildingPrivlidge privilege = entity.GetBuildingPrivilege();
            return privilege != null && privilege.IsAuthed(player);
        }

        private void Unload()
        {
            config = null;
        }
    }
}