OnHorseHitch

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

namespace Oxide.Plugins
{
    [Info("Trough Owner Guard", "RustPluginGenerator", "1.0.0")]
    [Description("Restricts hitching animals to troughs so only the owner or their team can do it")]
    public class TroughOwnerGuard : RustPlugin
    {
        private const string PermBypass = "troughownerguard.bypass";

        private PluginConfig config;

        public class PluginConfig
        {
            [JsonProperty("Max trough search distance")]
            public float MaxTroughDistance = 4f;

            [JsonProperty("Require same team as animal owner")]
            public bool RequireSameTeam = 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>
            {
                ["NoPermission"] = "You are not allowed to hitch an animal you do not own to this trough.",
                ["NotYourAnimal"] = "This animal belongs to someone else.",
                ["TroughTooFar"] = "No usable hitch trough is close enough."
            }, 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(PermBypass, this);
        }

        private object OnHorseHitch(HitchTrough.IHitchable hitchable, HitchTrough.HitchSpot spot)
        {
            if (hitchable == null || spot == null) return null;

            var animal = hitchable as BaseEntity;
            if (animal == null || animal.IsDestroyed) return null;

            var trough = FindTrough(animal.transform.position);
            if (trough == null) return null;

            var animalOwner = animal.OwnerID;
            if (animalOwner == 0 || trough.OwnerID == animalOwner) return null;

            var player = BasePlayer.FindByID(animalOwner);

            if (config.RequireSameTeam && player != null && player.currentTeam != 0)
            {
                var team = RelationshipManager.ServerInstance?.FindTeam(player.currentTeam);
                if (team != null && team.members.Contains(trough.OwnerID))
                    return null;
            }

            if (player != null)
            {
                if (permission.UserHasPermission(player.UserIDString, PermBypass)) return null;
                player.ChatMessage(Msg("NotYourAnimal", player.UserIDString));
            }

            return false;
        }

        private HitchTrough FindTrough(Vector3 position)
        {
            foreach (var entity in BaseNetworkable.serverEntities)
            {
                var trough = entity as HitchTrough;
                if (trough == null || trough.IsDestroyed) continue;
                if (Vector3.Distance(trough.transform.position, position) <= config.MaxTroughDistance) return trough;
            }
            return null;
        }
    }
}