private static void MenuSelection() { int menuSelection = -1; while (menuSelection != 0) { Console.WriteLine(""); Console.WriteLine("Welcome to TEnmo! Please make a selection: "); Console.WriteLine("1: View your current balance"); Console.WriteLine("2: View your past transfers"); Console.WriteLine("3: View your pending requests"); Console.WriteLine("4: Send TE bucks"); Console.WriteLine("5: Request TE bucks"); Console.WriteLine("6: Log in as different user"); Console.WriteLine("0: Exit"); Console.WriteLine("---------"); Console.Write("Please choose an option: "); if (!int.TryParse(Console.ReadLine(), out menuSelection)) { Console.WriteLine("Invalid input. Please enter only a number."); } else if (menuSelection == 1) { Console.WriteLine($"Your current account balance is: ${apiService.GetBalance()}"); } else if (menuSelection == 2) { List <API_Transfer> transfers = apiService.ListTransfers(); if (transfers != null && transfers.Count > 0) { consoleService.WriteTransferList(transfers); int id = consoleService.TransferToDetail(transfers); API_Transfer transfer = apiService.GetTransfer(id); consoleService.GetTransferDetails(transfer); } } else if (menuSelection == 3) { List <API_Transfer> transfers = apiService.ListTransfers(); if (transfers != null && transfers.Count > 0) { consoleService.WritePendingTransferList(transfers); } } else if (menuSelection == 4) { List <API_User> users = apiService.ListUsers(); int userID = UserService.GetUserId(); API_Account accountFrom = apiService.GetAccount(userID); if (users != null && users.Count > 0) { API_Transfer transfer = consoleService.StartTransfer(users); if (transfer.TransferAmount > accountFrom.Balance) { Console.WriteLine("Insufficient Funds"); } else { API_Transfer updatedTransfer = apiService.DoTransfer(transfer); apiService.UpdateBalance(updatedTransfer); Console.WriteLine("Amount has been transferred"); } } } else if (menuSelection == 5) { List <API_User> users = apiService.ListUsers(); if (users != null && users.Count > 0) { API_Transfer transfer = consoleService.RequestTransfer(users); apiService.DoTransfer(transfer); Console.WriteLine("Request Sent."); } } else if (menuSelection == 6) { Console.WriteLine(""); UserService.SetLogin(new API_User()); //wipe out previous login info Run(); //return to entry point } else { Console.WriteLine("Goodbye!"); Environment.Exit(0); } } }