CanHackCrate

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

namespace Oxide.Plugins
{
    [Info("HackPermissionGate", "RustPluginGenerator", "1.0.0")]
    [Description("Restricts hacking of hackable crates to permitted players during a configured time window.")]
    public class HackPermissionGate : RustPlugin
    {
        private const string PermUse = "hackpermissiongate.use";

        private PluginConfig config;

        public class PluginConfig
        {
            [JsonProperty("Require permission to hack crates")]
            public bool RequirePermission { get; set; } = true;

            [JsonProperty("Require an event time window")]
            public bool RequireEventWindow { get; set; } = false;

            [JsonProperty("Event window start hour (UTC)")]
            public int WindowStartHour { get; set; } = 18;

            [JsonProperty("Event window end hour (UTC)")]
            public int WindowEndHour { get; set; } = 22;
        }

        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>
            {
                ["NoPermission"] = "You are not authorized to hack crates.",
                ["OutsideWindow"] = "Crate hacking is only allowed between {0}:00 and {1}:00 UTC.",
                ["HackStarts"] = "You have started hacking a locked crate."
            }, 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(PermUse, this);
        }

        private object CanHackCrate(BasePlayer player, HackableLockedCrate hackableLockedCrate)
        {
            if (player == null || !player.IsConnected || player.IsNpc || hackableLockedCrate == null)
                return null;

            if (config.RequirePermission && !permission.UserHasPermission(player.UserIDString, PermUse))
            {
                player.ChatMessage(Msg("NoPermission", player.UserIDString));
                return "no permission";
            }

            if (!InsideWindow())
            {
                player.ChatMessage(Msg("OutsideWindow", player.UserIDString, config.WindowStartHour, config.WindowEndHour));
                return "outside window";
            }

            return null;
        }

        private bool InsideWindow()
        {
            if (!config.RequireEventWindow) return true;

            int hour = DateTime.UtcNow.Hour;
            if (config.WindowStartHour <= config.WindowEndHour)
                return hour >= config.WindowStartHour && hour < config.WindowEndHour;
            return hour >= config.WindowStartHour || hour < config.WindowEndHour;
        }
    }
}