MafiaTelegramBot/MafiaTelegramBot/Game/GameRoles/CopRole.cs

using System.Linq;
using System.Threading.Tasks;
using MafiaTelegramBot.Game.GameRooms;
using MafiaTelegramBot.Models;
using MafiaTelegramBot.Resources;
using Telegram.Bot.Types;

namespace MafiaTelegramBot.Game.GameRoles
{
    public class CopRole : GameRoom.Role
    {
        public override Roles RoleKey => Roles.Cop;

        public override async Task NightAction()
        {
            var targets = Room.Players.Values.Except(KnownRoles).Where(p => p.IsAlive).ToList();
            var message = await Bot.SendWithMarkdown2(Player.ChatId, strings.choose_player_to_check_role, 
                Keyboards.NightChooseTargetKeyboard(targets, Player.Id));
            MessageId = message.MessageId;
        }

        public override async Task ApplyNightActionResult()
        {
            if (NightTargetId == -1)
                await Bot.Get().EditMessageTextAsync(Player.ChatId, MessageId, strings.you_have_not_choosen_target);
            else
            {
                var user = Room.Players[NightTargetId];
                KnownRoles.Add(user);
                var role = user.GetRole() is Roles.Don or Roles.Mafia
                    ? roles.Mafia
                    : roles.Villager;
                await Bot.Get().EditMessageTextAsync(Player.ChatId, MessageId, $"{strings.role_of_your_target} {user.NickName} - {role}");
            }
        }

        public override Task<Message> SetNightTarget(long userId)
        {
            NightTargetId = userId;
            return Bot.Get().EditMessageTextAsync(Player.ChatId, MessageId, $"{strings.you_choose_target} {Room.Players[userId].NickName}");
        }

        public CopRole(GameRoom room, Player player) : base(room, player) { }
    }
}