OnBookmarkInput

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

namespace Oxide.Plugins
{
    [Info("Bookmark Input Guard", "RustPluginGenerator", "1.0.0")]
    [Description("Blocks ComputerStation bookmark input for players without a permission")]
    public class BookmarkInputGuard : RustPlugin
    {
        private const string PermControl = "bookmarkinputguard.control";

        private PluginConfig config;
        private readonly Dictionary<ulong, float> lastWarn = new Dictionary<ulong, float>();

        private class PluginConfig
        {
            [JsonProperty("Send chat warning when blocked")]
            public bool WarnOnBlock { get; set; } = true;

            [JsonProperty("Warning cooldown in seconds")]
            public float WarnCooldown { get; set; } = 5f;
        }

        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>
            {
                ["Blocked"] = "You are not allowed to control this device.",
                ["NoPermission"] = "You do not have the '{0}' permission."
            }, this);
        }

        private string Msg(string key, string userId = null, params object[] args) =>
            string.Format(lang.GetMessage(key, this, userId), args);

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

        private object OnBookmarkInput(ComputerStation computerStation, BasePlayer player, InputState inputState)
        {
            if (computerStation == null || player == null || inputState == null) return null;
            if (permission.UserHasPermission(player.UserIDString, PermControl)) return null;

            if (config.WarnOnBlock && player.IsConnected)
            {
                float now = UnityEngine.Time.realtimeSinceStartup;
                float last;
                if (!lastWarn.TryGetValue(player.userID, out last) || now - last >= config.WarnCooldown)
                {
                    lastWarn[player.userID] = now;
                    player.ChatMessage(Msg("Blocked", player.UserIDString));
                }
            }

            // Non-null return stops the input from reaching the controlled entity.
            return false;
        }

        private void Unload()
        {
            lastWarn.Clear();
        }
    }
}