Add authorization for /help command and handler setup

- Updated `HomeController.cs` to include two new methods for handling the `/help` command, one authorized and one not.
- Modified `Program.cs` to include `TelegramBot.Extensions` namespace and use an authorization handler.
- Added `AuthorizationHandler.cs` to define `AuthorizationHandler` class implementing `IBotAuthorizationHandler` for user ID-based authorization.

Author: bvdcode

Sources/TelegramBot.ConsoleTest/AuthorizationHandler.cs

@@ -0,0 +1,19 @@
+using Telegram.Bot.Types;
+using TelegramBot.Abstractions;
+using TelegramBot.ActionResults;
+
+namespace TelegramBot.ConsoleTest
+{
+    internal class AuthorizationHandler : IBotAuthorizationHandler
+    {
+        public bool Authorize(User authorizingUser)
+        {
+            return authorizingUser.Id == 1234567890;
+        }
+
+        public IActionResult HandleUnauthorized(User authorizingUser)
+        {
+            return new TextResult("You are not authorized to use this bot.");
+        }
+    }
+}

Sources/TelegramBot.ConsoleTest/Controllers/HomeController.cs

@@ -28,5 +28,20 @@ public IActionResult HandleLanguageAsync(string lang)
             _logger.LogInformation("Language command received.");
             return Text($"Language set to {lang}.");
         }
+
+        [TextCommand("/help")]
+        public IActionResult HandleHelpAsync(int page = 1)
+        {
+            _logger.LogInformation("Help command received.");
+            return Text("Help message: page " + page);
+        }
+
+        [Authorize]
+        [TextCommand("/help")]
+        public IActionResult HandleHelpAsync()
+        {
+            _logger.LogInformation("Help command received.");
+            return Text("Help message.");
+        }
     }
 }

Sources/TelegramBot.ConsoleTest/Program.cs

@@ -1,4 +1,5 @@
 using TelegramBot.Builders;
+using TelegramBot.Extensions;
 using Microsoft.EntityFrameworkCore;
 using TelegramBot.ConsoleTest.Database;
 using Microsoft.Extensions.DependencyInjection;
@@ -12,9 +13,12 @@ public static void Main(string[] args)
             BotBuilder builder = new BotBuilder(args)
                 .UseApiKey(x => x.FromConfiguration());
 
-            builder.Services.AddDbContext<AppDbContext>(x => x.UseSqlite("Data Source=app.db"));
+            builder.Services
+                .AddDbContext<AppDbContext>(x => x.UseSqlite("Data Source=app.db"))
+                .UseAuthorizationHandler<AuthorizationHandler>();
             var app = builder.Build();
             app.MapControllers();
+            
             app.Run();
         }
     }