OnBookmarkDelete

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

namespace Oxide.Plugins
{
    [Info("Bookmark Protection", "RustPluginGenerator", "1.0.0")]
    [Description("Lets admins lock control bookmarks on computer stations so they cannot be deleted")]
    public class BookmarkProtection : RustPlugin
    {
        private const string PermUse = "bookmarkprotection.use";

        private PluginConfig config;
        private StoredData data;

        private class PluginConfig
        {
            [JsonProperty("Send chat message when a locked bookmark is deleted")]
            public bool NotifyOnBlock { get; set; } = true;
        }

        private class StoredData
        {
            [JsonProperty("Locked bookmarks by station id")]
            public Dictionary<ulong, List<string>> Locked { get; set; } = new Dictionary<ulong, List<string>>();
        }

        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>
            {
                ["Locked"] = "That bookmark is locked and cannot be removed",
                ["Toggled"] = "Bookmark '{0}' protection is now {1}",
                ["NotStation"] = "You must be mounted on a computer station"
            }, 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);
            data = Interface.Oxide.DataFileSystem.ReadObject<StoredData>(Name) ?? new StoredData();
        }

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

        [ChatCommand("bookmark")]
        private void CmdBookmark(BasePlayer player, string command, string[] args)
        {
            if (player == null || !permission.UserHasPermission(player.UserIDString, PermUse)) return;
            if (args.Length == 0) return;

            var station = player.GetMounted() as ComputerStation;
            if (station == null)
            {
                player.ChatMessage(Msg("NotStation", player.UserIDString));
                return;
            }

            ulong id = station.net.ID.Value;
            if (!data.Locked.TryGetValue(id, out var list))
            {
                list = new List<string>();
                data.Locked[id] = list;
            }

            bool nowLocked;
            if (list.Contains(args[0]))
            {
                list.Remove(args[0]);
                nowLocked = false;
            }
            else
            {
                list.Add(args[0]);
                nowLocked = true;
            }

            player.ChatMessage(Msg("Toggled", player.UserIDString, args[0], nowLocked ? "on" : "off"));
            Interface.Oxide.DataFileSystem.WriteObject(Name, data);
        }

        private object OnBookmarkDelete(ComputerStation computerStation, BasePlayer mountedPlayer, string identifier)
        {
            if (computerStation == null || string.IsNullOrEmpty(identifier)) return null;
            if (!data.Locked.TryGetValue(computerStation.net.ID.Value, out var list)) return null;
            if (!list.Contains(identifier)) return null;

            if (config.NotifyOnBlock && mountedPlayer != null && mountedPlayer.IsConnected)
                mountedPlayer.ChatMessage(Msg("Locked", mountedPlayer.UserIDString));

            return true;
        }
    }
}