telegram-bot/modules/Destiny2.WhereIsXur/RequestHandler.cs

using System.Threading.Tasks;
using BotFramework;
using BotFramework.Attributes;
using Kruzya.TelegramBot.Destiny2.WhereIsXur.Provider;
using Telegram.Bot.Types.Enums;

namespace Kruzya.TelegramBot.Destiny2.WhereIsXur
{
    public class RequestHandler : BotEventHandler
    {
        protected readonly IXurPlaceProvider _placeProvider;

        public RequestHandler(IXurPlaceProvider xurPlaceProvider)
        {
            _placeProvider = xurPlaceProvider;
        }
        
        [Command("d2_xur")]
        public async Task WhereIsXur()
        {
            var place = await _placeProvider.GetPlaceAsync();
            if (string.IsNullOrWhiteSpace(place))
            {
                await Response("unknown");
                return;
            }

            await Response(place);
        }

        protected async Task Response(string place)
        {
            await Bot.SendTextMessageAsync(Chat, $"<b>Xûr</b> place is <code>{place}</code>", ParseMode.Html);
        }
    }
}