OnFreeableContainerRelease

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

namespace Oxide.Plugins
{
    [Info("AnchoredLootRelease", "RustPluginGenerator", "1.0.0")]
    [Description("Keeps freeable loot containers anchored for a configurable cooldown after release is triggered.")]
    public class AnchoredLootRelease : RustPlugin
    {
        private const string PermManage = "anchoredlootrelease.manage";

        private PluginConfig config;
        private readonly Dictionary<ulong, double> releaseTimes = new Dictionary<ulong, double>();
        private bool dirty;

        private class PluginConfig
        {
            [JsonProperty("Cooldown seconds before a container can release")]
            public float CooldownSeconds = 30f;

            [JsonProperty("Notify the releasing player")]
            public bool NotifyPlayer = 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>
            {
                ["Locked"] = "This container stays anchored for another {0} seconds.",
                ["Released"] = "Loot released. Grab it before it drifts.",
                ["Saved"] = "Cooldown timestamps saved."
            }, 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(PermManage, this);
            LoadData();
        }

        private void Unload()
        {
            SaveData();
        }

        private void LoadData()
        {
            try
            {
                var data = Interface.Oxide.DataFileSystem.ReadObject<Dictionary<ulong, double>>(Name);
                if (data != null)
                {
                    foreach (var entry in data) releaseTimes[entry.Key] = entry.Value;
                }
            }
            catch
            {
                PrintWarning("Could not read stored release times, starting empty");
            }
        }

        private void SaveData()
        {
            if (!dirty) return;
            Interface.Oxide.DataFileSystem.WriteObject(Name, releaseTimes);
            dirty = false;
        }

        private object OnFreeableContainerRelease(FreeableLootContainer freeableLootContainer, BasePlayer ply)
        {
            if (freeableLootContainer == null) return null;

            ulong id = freeableLootContainer.net.ID.Value;
            double now = Facepunch.Math.Epoch.Current;
            double last;
            if (!releaseTimes.TryGetValue(id, out last))
            {
                releaseTimes[id] = now;
                dirty = true;
                return null;
            }

            double remaining = config.CooldownSeconds - (now - last);
            if (remaining <= 0) return null;

            if (config.NotifyPlayer && ply != null && ply.IsConnected)
            {
                ply.ChatMessage(Msg("Locked", ply.UserIDString, Math.Ceiling(remaining)));
            }

            return false;
        }
    }
}