casa-bot/src/CasaBot/CasaBotApp/Program.cs

using CasaBotApp;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

// See https://aka.ms/new-console-template for more information

var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
IConfigurationRoot configuration = new ConfigurationBuilder()
    .AddJsonFile($"appsettings.json", true, true)
    .AddJsonFile($"appsettings.{environment}.json", true, true)
    .AddEnvironmentVariables()
    .Build();

var serviceCollection = new ServiceCollection();

serviceCollection.AddLogging(builder =>
{
    builder.AddConsole();
});
serviceCollection.AddSingleton(new BotConfiguration()
{
    Token = configuration.GetValue<string>("TelegramToken") ?? ""
});
serviceCollection.AddSingleton<BotHandler>();

var serviceProvider = serviceCollection.BuildServiceProvider();


var botHandler = serviceProvider.GetService<BotHandler>();
if (botHandler is null)
{
    Console.WriteLine("Bot is not initialized");
    return;
}

using var cts = new CancellationTokenSource();

botHandler.Start(cts.Token);

_ = SendMessageToSubscribers(cts.Token);


Console.WriteLine($"bot is running... Press Enter to terminate");
Console.ReadLine();
cts.Cancel(); // stop the bot
return;


async Task SendMessageToSubscribers(CancellationToken cancellationToken)
{
    while (!cancellationToken.IsCancellationRequested)
    {
        await Task.Delay(TimeSpan.FromMinutes(1), cancellationToken);
        botHandler.Update("Hello from CasaBot! at " + DateTime.Now);
    }
}