OnVendingShopOpened

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

namespace Oxide.Plugins
{
    [Info("Vending Shop Audit", "RustPluginGenerator", "1.0.0")]
    [Description("Logs and summarises vending machine shop opens per machine and player.")]
    public class VendingShopAudit : RustPlugin
    {
        private const string PermUse = "vendingshopaudit.use";

        private class PluginConfig
        {
            [JsonProperty("Notify player in chat")]
            public bool NotifyPlayer { get; set; } = true;

            [JsonProperty("Seconds between chat notifications per player")]
            public float CooldownSeconds { get; set; } = 20f;
        }

        private class AuditData
        {
            public Dictionary<string, int> OpensPerMachine { get; set; } = new Dictionary<string, int>();
            public Dictionary<string, int> OpensPerPlayer { get; set; } = new Dictionary<string, int>();
        }

        private PluginConfig config;
        private AuditData data;
        private readonly Dictionary<ulong, float> lastNotify = new Dictionary<ulong, float>();
        private Timer saveTimer;

        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>
            {
                ["Opened"] = "Shop '{0}' at {1} has {2} sell offers.",
                ["Summary"] = "Tracked {0} shop opens across {1} machines.",
                ["NoPermission"] = "You do not have permission to use this command."
            }, 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 void OnServerInitialized()
        {
            data = Interface.Oxide.DataFileSystem.ReadObject<AuditData>(Name) ?? new AuditData();
            saveTimer = timer.Every(60f, SaveData);
        }

        private void Unload()
        {
            saveTimer?.Destroy();
            SaveData();
        }

        private void SaveData()
        {
            if (data != null)
            {
                Interface.Oxide.DataFileSystem.WriteObject(Name, data);
            }
        }

        private void OnVendingShopOpened(VendingMachine vendingMachine, BasePlayer player)
        {
            if (vendingMachine == null || player == null || !player.IsConnected) return;

            string machineId = vendingMachine.net.ID.Value.ToString();
            data.OpensPerMachine.TryGetValue(machineId, out int machineCount);
            data.OpensPerMachine[machineId] = machineCount + 1;

            string playerId = player.UserIDString;
            data.OpensPerPlayer.TryGetValue(playerId, out int playerCount);
            data.OpensPerPlayer[playerId] = playerCount + 1;

            if (!config.NotifyPlayer || !permission.UserHasPermission(playerId, PermUse)) return;

            float now = Time.realtimeSinceStartup;
            if (lastNotify.TryGetValue(player.userID, out float last) && now - last < config.CooldownSeconds) return;
            lastNotify[player.userID] = now;

            int sellOrders = vendingMachine.sellOrders?.sellOrders?.Count ?? 0;
            Vector3 pos = vendingMachine.transform.position;
            player.ChatMessage(Msg("Opened", playerId, vendingMachine.shopName, $"{pos.x:0},{pos.z:0}", sellOrders));
        }

        [ChatCommand("shopaudit")]
        private void CmdShopAudit(BasePlayer player, string command, string[] args)
        {
            if (player == null) return;
            if (!player.IsAdmin && !permission.UserHasPermission(player.UserIDString, PermUse))
            {
                player.ChatMessage(Msg("NoPermission", player.UserIDString));
                return;
            }

            int total = 0;
            foreach (var pair in data.OpensPerMachine) total += pair.Value;
            player.ChatMessage(Msg("Summary", player.UserIDString, total, data.OpensPerMachine.Count));
        }
    }
}