ChatBot/ChatBot/Services/TelegramBotHostedService.cs

using ChatBot.Services.Telegram.Interfaces;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace ChatBot.Services
{
    /// <summary>
    /// Hosted service wrapper for TelegramBotService to handle scoped dependencies
    /// </summary>
    public class TelegramBotHostedService : IHostedService
    {
        private readonly IServiceProvider _serviceProvider;
        private readonly ILogger<TelegramBotHostedService> _logger;
        private ITelegramBotService? _botService;

        public TelegramBotHostedService(
            IServiceProvider serviceProvider,
            ILogger<TelegramBotHostedService> logger
        )
        {
            _serviceProvider = serviceProvider;
            _logger = logger;
        }

        public async Task StartAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("Starting Telegram Bot Hosted Service...");

            using var scope = _serviceProvider.CreateScope();
            _botService = scope.ServiceProvider.GetRequiredService<ITelegramBotService>();

            await _botService.StartAsync(cancellationToken);
        }

        public async Task StopAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("Stopping Telegram Bot Hosted Service...");

            if (_botService != null)
            {
                await _botService.StopAsync(cancellationToken);
            }
        }
    }
}