OnPhoneDialFailed

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

namespace Oxide.Plugins
{
    [Info("Phone Dial Failure Notice", "RustPluginGenerator", "1.0.0")]
    [Description("Sends a localized chat message when a player's phone call fails to dial")]
    public class PhoneDialFailureNotice : RustPlugin
    {
        private PluginConfig config;
        private readonly Dictionary<ulong, float> lastNotice = new Dictionary<ulong, float>();

        private class PluginConfig
        {
            [JsonProperty("Cooldown seconds between notices")]
            public float CooldownSeconds = 8f;
        }

        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>
            {
                ["Busy"] = "That line is busy right now.",
                ["NoAnswer"] = "Nobody picked up the phone.",
                ["NoCarrier"] = "The call could not be connected.",
                ["Generic"] = "Your call failed to dial ({0}).",
                ["Cooldown"] = "Please wait before trying again."
            }, this);
        }

        private string Msg(string key, string userId = null, params object[] args) =>
            string.Format(lang.GetMessage(key, this, userId), args);

        private void OnPhoneDialFailed(PhoneController phoneController, Telephone.DialFailReason reason, BasePlayer currentPlayer)
        {
            if (currentPlayer == null || !currentPlayer.IsConnected)
                return;

            float now = Time.realtimeSinceStartup;
            float last;
            if (lastNotice.TryGetValue(currentPlayer.userID, out last) && now - last < config.CooldownSeconds)
                return;
            lastNotice[currentPlayer.userID] = now;

            string key;
            switch (reason.ToString())
            {
                case "Busy":
                    key = "Busy";
                    break;
                case "NoAnswer":
                    key = "NoAnswer";
                    break;
                case "NoCarrier":
                    key = "NoCarrier";
                    break;
                default:
                    currentPlayer.ChatMessage(Msg("Generic", currentPlayer.UserIDString, reason));
                    return;
            }

            currentPlayer.ChatMessage(Msg(key, currentPlayer.UserIDString));
        }

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