OnItemRemovedFromContainer

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

namespace Oxide.Plugins
{
    [Info("Container Withdraw Audit", "RustPluginGenerator", "1.0.0")]
    [Description("Summarises which items a player removed from entity-owned containers during a loot session")]
    public class ContainerWithdrawAudit : RustPlugin
    {
        private const string PermSee = "containerwithdrawaudit.see";

        private PluginConfig config;
        private readonly Dictionary<ulong, Dictionary<string, int>> sessions = new Dictionary<ulong, Dictionary<string, int>>();
        private readonly Dictionary<ulong, Timer> reportTimers = new Dictionary<ulong, Timer>();

        private class PluginConfig
        {
            [JsonProperty("Summary delay after last withdrawal (seconds)")]
            public float ReportDelay = 3f;

            [JsonProperty("Notify players with permission")]
            public bool NotifyAdmins = 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>
            {
                ["Summary"] = "You removed {0} item stacks from containers: {1}",
                ["AdminSummary"] = "{0} removed from containers: {1}",
                ["None"] = "You did not remove any tracked items this session."
            }, 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(PermSee, this);
        }

        private void OnItemRemovedFromContainer(ItemContainer itemContainer, Item item, BasePlayer sourcePlayer)
        {
            if (itemContainer == null || item == null || sourcePlayer == null || !sourcePlayer.IsConnected) return;
            if (itemContainer.entityOwner == null) return;
            if (!(itemContainer.entityOwner is StorageContainer)) return;
            if (item.info == null) return;

            ulong userId = sourcePlayer.userID.Get();
            Dictionary<string, int> totals;
            if (!sessions.TryGetValue(userId, out totals))
            {
                totals = new Dictionary<string, int>();
                sessions[userId] = totals;
            }

            int current;
            totals.TryGetValue(item.info.shortname, out current);
            totals[item.info.shortname] = current + item.amount;

            Timer existing;
            if (reportTimers.TryGetValue(userId, out existing) && existing != null) existing.Destroy();
            reportTimers[userId] = timer.Once(Mathf.Max(1f, config.ReportDelay), () => Report(sourcePlayer));
        }

        private void Report(BasePlayer player)
        {
            if (player == null) return;
            ulong userId = player.userID.Get();
            reportTimers.Remove(userId);

            Dictionary<string, int> totals;
            if (!sessions.TryGetValue(userId, out totals) || totals.Count == 0) return;
            sessions.Remove(userId);

            string body = string.Empty;
            foreach (KeyValuePair<string, int> pair in totals)
            {
                if (body.Length > 0) body += ", ";
                body += pair.Key + " x" + pair.Value;
            }

            player.ChatMessage(Msg("Summary", player.UserIDString, totals.Count, body));

            if (config.NotifyAdmins && permission.UserHasPermission(player.UserIDString, PermSee))
            {
                PrintToChat(Msg("AdminSummary", null, player.displayName, body));
            }
        }

        private void OnPlayerLootEnd(PlayerLoot inventory)
        {
            BasePlayer player = inventory != null && inventory.baseEntity != null ? inventory.baseEntity.ToPlayer() : null;
            if (player == null) return;

            Timer existing;
            ulong userId = player.userID.Get();
            if (reportTimers.TryGetValue(userId, out existing) && existing != null)
            {
                existing.Destroy();
                reportTimers.Remove(userId);
            }
            NextTick(() => Report(player));
        }

        private void Unload()
        {
            foreach (Timer timer in reportTimers.Values)
            {
                if (timer != null) timer.Destroy();
            }
            reportTimers.Clear();
            sessions.Clear();
        }
    }
}