OnDoorOpened

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

namespace Oxide.Plugins
{
    [Info("Door Reward", "RustPluginGenerator", "1.0.0")]
    [Description("Gives scrap to players with a permission when they open a door, with a cooldown.")]
    public class DoorReward : RustPlugin
    {
        private const string PermUse = "doorreward.use";

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

        private class PluginConfig
        {
            [JsonProperty("Reward amount")]
            public int RewardAmount = 5;

            [JsonProperty("Cooldown seconds")]
            public float CooldownSeconds = 120f;
        }

        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>
            {
                ["Reward"] = "You received {0} scrap for opening a door."
            }, 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 OnDoorOpened(Door door, BasePlayer player)
        {
            if (door == null || player == null || player.IsNpc || !player.IsConnected) return;
            if (!permission.UserHasPermission(player.UserIDString, PermUse)) return;

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

            Item item = ItemManager.CreateByName("scrap", config.RewardAmount);
            if (item != null)
            {
                player.GiveItem(item);
            }
            player.ChatMessage(Msg("Reward", player.UserIDString, config.RewardAmount));
        }

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