feat: added DI to Client

JOBot.TClient/Commands/ITelegramCommand.cs

@@ -0,0 +1,8 @@
+using Telegram.Bot.Types;
+
+namespace JOBot.TClient.Commands;
+
+public interface ITelegramCommand
+{
+    public Task ExecuteAsync(Update update, CancellationToken ct);
+}

JOBot.TClient/Commands/StartCommand.cs

@@ -0,0 +1,18 @@
+using JOBot.TClient.Core.Services;
+using Telegram.Bot;
+using Telegram.Bot.Types;
+
+namespace JOBot.TClient.Commands;
+
+public class StartCommand(ITelegramBotClient bot, UserService userService) : ITelegramCommand
+{
+    public async Task ExecuteAsync(Update update, CancellationToken ct)
+    {
+        var isRegistered = await userService.RegisterAsync(
+            update.Message?.Chat.Id ?? throw new Exception("Chat id is null"),
+            update.Message.Chat.Username);
+        
+            await bot.SendMessage(chatId: update.Message.Chat.Id,
+                isRegistered ? "You registered" : "Not registered", cancellationToken: ct);
+    }
+}