private void SetCalculationManager(out ICalculatorManager manager)
{
_view.DisplayMessage("Select way for calculating: " +
"\npress 1 - via file; " +
"\npress 2 - via console " +
"\npress 0 - to exit");
while (true)
{
int result = 0;
while (!int.TryParse(_view.GetUserResponse(), out result))
{
_view.DisplayMessage("Wrong number, try again.");
}
switch (result)
{
case 0:
manager = null;
return;
case 1:
manager = new FileCalculator(_view);
return;
case 2:
manager = new ConsoleCalculator(_view);
return;
default:
manager = null;
break;
}
}
}
public string ReadData()
{
string path;
_view.DisplayMessage("Enter path to the file with operations which needs to calculate");
do
{
path = _view.GetUserResponse();
}while (!CheckIfExists(path));
return(path);
}
public string ReadData()
{
_view.DisplayMessage("Calculator supports only operations of addition(+), multiplication(*), division(/) and subtraction(-). " +
"\nAlso expression should not contain brackets " +
"\nPlease enter expression for calculation. ");
string expression;
while (!Regex.IsMatch(expression = _view.GetUserResponse(), _validLineRegex))
{
_view.DisplayMessage("Expresion cannot be calculated. Enter valid formula.");
}
return(expression);
}