Scratch for running next callbacks in queue

Core/Extensions/RepositoryExtension.cs

@@ -1,6 +1,7 @@
 using System.Threading.Tasks;
 using Kruzya.TelegramBot.Core.Data;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 
 namespace Kruzya.TelegramBot.Core.Extensions
 {
@@ -48,6 +49,23 @@ namespace Kruzya.TelegramBot.Core.Extensions
 
         #region Core-context repository extensions
 
+        #region BotUser
+
+        public static async Task<BotUser> FindOrCreate(this DbSet<BotUser> repository, long chatId, int userId)
+        {
+            var user = await repository.SingleOrDefaultAsync(e => e.ChatId == chatId && e.UserId == userId);
+            if (user == null)
+            {
+                user = repository.Create();
+                user.ChatId = chatId;
+                user.UserId = userId;
+            }
+
+            return user;
+        }
+
+        #endregion
+        
         #region BotUserValue
 
         #region FindOption
@@ -79,6 +97,7 @@ namespace Kruzya.TelegramBot.Core.Extensions
             if (opt == null)
             {
                 opt = repository.Create();
+                opt.BotUser = await repository.GetService<CoreContext>().Users.FindOrCreate(chatId, userId);
             }
 
             return opt;