OnApartmentRoomUpgraded

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

namespace Oxide.Plugins
{
    [Info("Apartment Upgrade Reward", "RustPluginGenerator", "1.0.0")]
    [Description("Gives players a configurable item reward when they upgrade an apartment room.")]
    public class ApartmentUpgradeReward : RustPlugin
    {
        private const string PermUse = "apartmentupgradereward.use";

        private PluginConfig config;
        private readonly Dictionary<ulong, DateTime> lastReward = new Dictionary<ulong, DateTime>();

        private class PluginConfig
        {
            [JsonProperty("Reward item shortname")]
            public string RewardShortname = "scrap";

            [JsonProperty("Reward amount")]
            public int RewardAmount = 25;

            [JsonProperty("Cooldown seconds")]
            public int CooldownSeconds = 300;
        }

        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>
            {
                ["Rewarded"] = "Room {0} upgraded. You received {1} x {2}.",
                ["Cooldown"] = "Room {0} upgraded, but your reward is on cooldown."
            }, 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 OnApartmentRoomUpgraded(ApartmentRoom apartmentRoom, BasePlayer player, ApartmentSize size, ApartmentBuilding apartmentBuilding)
        {
            if (apartmentRoom == null || player == null || !player.IsConnected)
                return;

            if (!permission.UserHasPermission(player.UserIDString, PermUse))
                return;

            var roomNumber = apartmentRoom.RoomNumber;

            DateTime last;
            if (lastReward.TryGetValue(player.userID.Get(), out last) && (DateTime.UtcNow - last).TotalSeconds < config.CooldownSeconds)
            {
                player.ChatMessage(Msg("Cooldown", player.UserIDString, roomNumber));
                return;
            }

            var item = ItemManager.CreateByName(config.RewardShortname, config.RewardAmount);
            if (item == null)
            {
                PrintWarning($"Unknown reward shortname '{config.RewardShortname}', no reward given");
                return;
            }

            var itemName = item.info != null ? item.info.displayName.english : config.RewardShortname;
            player.GiveItem(item);

            lastReward[player.userID.Get()] = DateTime.UtcNow;
            player.ChatMessage(Msg("Rewarded", player.UserIDString, roomNumber, config.RewardAmount, itemName));
        }

        private void Unload()
        {
            lastReward.Clear();
        }
    }
}