OnLockRemove

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

namespace Oxide.Plugins
{
    [Info("Car Lock Owner Only", "RustPluginGenerator", "1.0.0")]
    [Description("Only allows the car owner, admins or permitted players to remove a modular car lock")]
    public class CarLockOwnerOnly : RustPlugin
    {
        private const string PermBypass = "carlockowneronly.bypass";

        private PluginConfig config;

        private class PluginConfig
        {
            [JsonProperty("Notify player when denied")]
            public bool NotifyOnDeny { get; set; } = true;

            [JsonProperty("Allow admins")]
            public bool AllowAdmins { 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"] = "Only the owner of this car can remove its lock."
            }, 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(PermBypass, this);
        }

        private object OnLockRemove(ModularCar carOccupant, BasePlayer player)
        {
            if (carOccupant == null || player == null) return null;

            if (config.AllowAdmins && player.IsAdmin) return null;
            if (permission.UserHasPermission(player.UserIDString, PermBypass)) return null;
            if (carOccupant.OwnerID == player.userID.Get()) return null;

            if (config.NotifyOnDeny && player.IsConnected)
                player.ChatMessage(Msg("Denied", player.UserIDString));

            return true;
        }
    }
}