BotHandler.cs



using Telegram.Bot.Polling;
using Telegram.Bot.Types.Enums;
using Telegram.Bot;
using System.Reflection.Metadata;
using Telegram.Bot.Types;
using Telegram.Bot.Exceptions;

namespace Telegram_Bot
{
    public class BotHandler
    {
        public string botToken { get; set; }

        public BotHandler(string token)
        {
            botToken = token;
        }


        public async Task BotHandle()
        {
            var botClient = new TelegramBotClient(botToken);

            using CancellationTokenSource cts = new();

            ReceiverOptions receiverOptions = new()
            {
                AllowedUpdates = Array.Empty<UpdateType>()
            };

            botClient.StartReceiving(
                updateHandler: HandleUpdateAsync,
                pollingErrorHandler: HandlePollingErrorAsync,
                receiverOptions: receiverOptions,
                cancellationToken: cts.Token
            );

            var me = await botClient.GetMeAsync();

            Console.WriteLine($"Start listening for @{me.Username}");
            Console.ReadLine();

            cts.Cancel();
        }

        public async Task HandleUpdateAsync(ITelegramBotClient botClient,Update update, CancellationToken cancellationToken)
        {

        }


        async Task HandlePollingErrorAsync(ITelegramBotClient botClient, Exception exception, CancellationToken cancellationToken)
        {
            var ErrorMessage = exception switch
            {
                ApiRequestException apiRequestException
                    => $"Telegram API Error:\n[{apiRequestException.ErrorCode}]\n{apiRequestException.Message}",
                _ => exception.ToString()
            };

            Console.WriteLine(ErrorMessage);
        }
    }
}