OnStructureDemolish

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

namespace Oxide.Plugins
{
    [Info("Demolish Window", "RustPluginGenerator", "1.0.0")]
    [Description("Restricts player structure demolition to a configurable UTC time window.")]
    public class DemolishWindow : RustPlugin
    {
        private const string PermBypass = "demolishwindow.bypass";

        private PluginConfig config;

        private class PluginConfig
        {
            [JsonProperty("Start hour UTC (0-23)")]
            public int StartHour = 2;

            [JsonProperty("End hour UTC (0-23)")]
            public int EndHour = 6;

            [JsonProperty("Admins bypass window")]
            public bool AdminBypass = 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>
            {
                ["Blocked"] = "Structures can only be demolished between {0}:00 and {1}:00 UTC."
            }, 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 OnStructureDemolish(DecayEntity decayEntity, BasePlayer player, bool flag)
        {
            if (decayEntity == null || player == null) return null;
            if (player.IsAdmin && config.AdminBypass) return null;
            if (permission.UserHasPermission(player.UserIDString, PermBypass)) return null;
            if (InWindow(DateTime.UtcNow.Hour)) return null;

            player.ChatMessage(Msg("Blocked", player.UserIDString, config.StartHour, config.EndHour));
            return true;
        }

        private bool InWindow(int hour)
        {
            int start = Math.Min(Math.Max(config.StartHour, 0), 23);
            int end = Math.Min(Math.Max(config.EndHour, 0), 23);
            if (start == end) return true;
            if (start < end) return hour >= start && hour < end;
            return hour >= start || hour < end;
        }
    }
}