CanSeeStash

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

namespace Oxide.Plugins
{
    [Info("Stash Owner Reveal", "RustPluginGenerator", "1.0.0")]
    [Description("Controls which players can reveal a hidden stash by looking at it.")]
    public class StashOwnerReveal : RustPlugin
    {
        private const string PermBypass = "stashownerreveal.bypass";

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

        private class PluginConfig
        {
            [JsonProperty("Allow team members to reveal stashes")]
            public bool AllowTeam { get; set; } = true;

            [JsonProperty("Admins bypass restrictions")]
            public bool AdminBypass { get; set; } = true;

            [JsonProperty("Denied message cooldown (seconds)")]
            public float DeniedCooldown { get; set; } = 10f;
        }

        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>
            {
                ["NotYourStash"] = "This stash does not belong to you."
            }, 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 void Unload()
        {
            lastDeniedAt.Clear();
        }

        private object CanSeeStash(BasePlayer player, StashContainer stash)
        {
            if (player == null || stash == null) return null;
            if (player.IsAdmin && config.AdminBypass) return null;
            if (permission.UserHasPermission(player.UserIDString, PermBypass)) return null;

            ulong ownerId = stash.OwnerID;
            if (ownerId == 0 || ownerId == player.userID.Get()) return null;

            if (config.AllowTeam && player.currentTeam != 0)
            {
                var team = RelationshipManager.ServerInstance.FindTeam(player.currentTeam);
                if (team != null && team.members.Contains(ownerId)) return null;
            }

            NotifyDenied(player, stash);
            return true;
        }

        private void NotifyDenied(BasePlayer player, StashContainer stash)
        {
            ulong id = stash.net.ID.Value;
            float now = Time.realtimeSinceStartup;
            float last;
            if (lastDeniedAt.TryGetValue(id, out last) && now - last < config.DeniedCooldown) return;
            lastDeniedAt[id] = now;
            player.ChatMessage(Msg("NotYourStash", player.UserIDString));
        }
    }
}