add MakeTransfer method in AccountStorage

Bank/BankContracts/StoragesContracts/IAccountStorage.cs

@@ -19,6 +19,7 @@ namespace BankContracts.StoragesContracts
         AccountViewModel? GetElement(AccountSearchModel model);
         AccountViewModel? Insert(AccountBindingModel model);
         AccountViewModel? Update(AccountBindingModel model);
+        bool MakeTransfer(int recipientId, int senderId, int sum);
         AccountViewModel? Delete(AccountBindingModel model);
     }
 }

Bank/BankDatabaseImplement/Implements/AccountStorage.cs

@@ -95,6 +95,47 @@ namespace BankDatabaseImplement.Implements
             return account.GetViewModel;
         }
 
+        public bool MakeTransfer(int recipientId, int senderId, int sum)
+		{
+			using var context = new BankDatabase();
+			using var transaction = context.Database.BeginTransaction();
+            try
+			{
+				Account? sender = context.Accounts.FirstOrDefault(x => x.Id == senderId);
+				if (sender == null)
+					throw new InvalidOperationException("Sender account was not found");
+                if (sender.Money < sum)
+					throw new InvalidOperationException("Sender account did not have enough money");
+				Account? recipient = context.Accounts.FirstOrDefault(x => x.Id == recipientId);
+                if (recipient == null)
+                    throw new InvalidOperationException("Recipient account was not found");
+                sender.Update(new AccountBindingModel
+                {
+                    Id = sender.Id,
+                    Number = sender.Number,
+                    ReleaseDate = sender.ReleaseDate,
+                    ManagerId = sender.ManagerId,
+                    Money = sender.Money - sum,
+                });
+                recipient.Update(new AccountBindingModel
+                {
+                    Id = recipient.Id,
+                    Number = recipient.Number,
+                    ReleaseDate = recipient.ReleaseDate,
+                    ManagerId = recipient.ManagerId,
+                    Money = recipient.Money + sum,
+                });
+				context.SaveChanges();
+				transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+            return true;
+		}
+
         public AccountViewModel? Delete(AccountBindingModel model)
         {
             using var context = new BankDatabase();