OnPatrolHelicopterKill

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

namespace Oxide.Plugins
{
    [Info("HelicopterKillFeed", "RustPluginGenerator", "1.0.0")]
    [Description("Broadcasts Patrol Helicopter kills and rewards the killer")]
    public class HelicopterKillFeed : RustPlugin
    {
        private const string PermBroadcast = "helicopterkillfeed.broadcast";

        private PluginConfig config;
        private readonly Dictionary<ulong, Timer> handled = new Dictionary<ulong, Timer>();

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

            [JsonProperty("Reward amount")]
            public int RewardAmount = 100;

            [JsonProperty("Broadcast to all players")]
            public bool Broadcast = 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>
            {
                ["Kill"] = "{0} destroyed the Patrol Helicopter!",
                ["KillAnonymous"] = "The Patrol Helicopter was destroyed.",
                ["Reward"] = "You received {0} x {1} for the kill.",
                ["NoPerm"] = "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(PermBroadcast, this);
        }

        private object OnPatrolHelicopterKill(PatrolHelicopter patrolHelicopter, HitInfo info)
        {
            if (patrolHelicopter == null || patrolHelicopter.IsDestroyed) return null;

            ulong heliId = patrolHelicopter.net.ID.Value;
            if (handled.ContainsKey(heliId)) return null;

            Timer cleanup = timer.Once(60f, () => handled.Remove(heliId));
            handled[heliId] = cleanup;

            BasePlayer killer = info?.InitiatorPlayer;
            string killerName = killer != null && !killer.IsNpc ? killer.displayName : null;

            if (config.Broadcast)
            {
                string text = killerName != null
                    ? Msg("Kill", null, killerName)
                    : Msg("KillAnonymous");
                Server.Broadcast(text);
            }

            if (killer == null || killer.IsNpc || killer.IsDead()) return null;

            var reward = ItemManager.CreateByName(config.RewardShortname, config.RewardAmount);
            if (reward != null && killer.inventory.GiveItem(reward))
            {
                killer.ChatMessage(Msg("Reward", killer.UserIDString, config.RewardAmount, reward.info.displayName.english));
            }

            return null;
        }

        [ChatCommand("helikill")]
        private void CmdHeliKill(BasePlayer player, string command, string[] args)
        {
            if (player == null || !permission.UserHasPermission(player.UserIDString, PermBroadcast))
            {
                if (player != null) player.ChatMessage(Msg("NoPerm", player.UserIDString));
                return;
            }
            player.ChatMessage("Helicopter kill feed is active.");
        }

        private void Unload()
        {
            foreach (var entry in handled)
            {
                entry.Value?.Destroy();
            }
            handled.Clear();
        }
    }
}