MafiaTelegramBot/MafiaTelegramBot/Game/GameRoles/CopRole.cs

using System.Linq;
using System.Threading.Tasks;
using MafiaTelegramBot.Game.GameRooms;
using MafiaTelegramBot.Resources;

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

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

        public override async Task ApplyNightActionResult()
        {
            if (NightTargetId != -2)
            {
                if (NightTargetId == -1)
                {
                    NightTargetId = NightTargetList[Utilities.Rnd.Next(NightTargetList.Count)].Id;
                    await Room.PlayersCh.EditTo(Player.Id, MessageId,
                        $"{strings.automatically_choosed_target} {Room.Players[NightTargetId].NickName}");
                }

                var user = Room.Players[NightTargetId];
                NightTargetId = -1;
                KnownRoles.Add(user);
                var role = user.GetRole() is Roles.Don or Roles.Mafia
                    ? roles.Mafia
                    : roles.Villager;
                await Room.PlayersCh.EditTo(Player.Id, MessageId,
                    $"{strings.role_of_your_target} {user.NickName} - {role}");
            }
        }

        public override async Task SetNightTarget(long userId)
        {
            NightTargetId = userId;
            await Room.PlayersCh.EditTo(Player.Id, MessageId, $"{strings.you_choose_target} {Room.Players[userId].NickName}");
        }

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