telegram-bot/modules/ChatManagement/Handler/ManagementHandler.cs

using System;
using System.Threading.Tasks;
using BotFramework;
using Kruzya.TelegramBot.Core.Extensions;
using Telegram.Bot;
using Telegram.Bot.Types;
using Telegram.Bot.Types.Enums;
using West.TelegramBot.ChatManagement.Extensions;

namespace West.TelegramBot.ChatManagement.Handler
{
    public class ManagementHandler : BotEventHandler
    {
        protected User GetVictim()
        {
            return RawUpdate.Message?.ReplyToMessage?.From;
        }
        
        protected async Task<bool> CanPunish()
        {
            return GetVictim() != null && await Bot.CanPunishMember(Chat, From, GetVictim());
        }

        protected async Task BanMember(User user, DateTime? banEnd = null, bool sendMessage = true)
        {
            await BanMember(user.Id, banEnd, sendMessage);

            if (sendMessage)
            {
                await Bot.SendTextMessageAsync(
                    Chat.Id, 
                    $"{From.ToHtml(false)} <code>заблокировал</code> {user.ToHtml(false)} <code>на 7 дней</code>",
                    disableNotification: true, parseMode: ParseMode.Html);
            }
        }
        
        protected async Task BanMember(long userId, DateTime? banEnd = null, bool sendMessage = true)
        {
            await Bot.RestrictChatMemberAsync(
                                Chat.Id,
                                userId,
                                new ChatPermissions
                                {
                                    CanSendMessages = false
                                },
                                banEnd ?? DateTime.Now.AddDays(7)
                                );
        }
    }
}