static void Main(string[] args)
{
try
{
InputParameters parameters = ParseInputParameters(args);
CalculateRegularPolygon(parameters);
}
catch (Exception ex)
{
WriteErrorLine(ex.Message);
}
Console.WriteLine("Press any key to continue... ");
Console.ReadKey();
}
/// <summary>
/// Create new InputParameters object from text parameters.
/// </summary>
/// <exception cref="InputParametersException">
/// Thrown when number of parameters is incorrect
/// or when any of parameters couldn't be converted into appropriate object.
/// </exception>
/// <param name="args">Parameters to be parsed.</param>
/// <returns>InputParameters object corresponding to args method parameter</returns>
private static InputParameters ParseInputParameters(string[] args)
{
//check parameters correctness
if (args.Length != 3)
{
throw new InputParametersException($"{args.Length} is not a valid arguments number. There should be 3 arguments.");
}
if (!Int32.TryParse(args[0], out int numberOfVertices))
{
throw new InputParametersException($"Could not read number of vertexes. '{args[0]}' is not a valid first argument.");
}
if (!Double.TryParse(args[1], out double sideLength))
{
throw new InputParametersException($"Could not read polygon side length. '{args[1]}' is not a valid second argument.");
}
if (!(args[2].ToLowerInvariant() == "d" || args[2].ToLowerInvariant() == "f")) // should be d or f
{
throw new InputParametersException($"Could not read if should store result in file or display it. '{args[2]}' is not a valid third argument.");
}
//set proper application mode
ApplicationMode chosenMode;
if (args[2].ToLowerInvariant() == "d")
{
chosenMode = ApplicationMode.ConsoleDisplay;
}
else
{
chosenMode = ApplicationMode.SaveToFile;
}
InputParameters parameters = new InputParameters()
{
NumberOfVertices = numberOfVertices,
SideLength = sideLength,
Mode = chosenMode
};
return(parameters);
}
/// <summary>
/// Creates RegularPolygon object with specified attributes and according to Mode from 'parameters':
/// displays polygon description on console or saves it to default file.
/// </summary>
/// <param name="parameters"></param>
private static void CalculateRegularPolygon(InputParameters parameters)
{
RegularPolygonFactory factory = new RegularPolygonFactory();
try
{
RegularPolygon polygon = factory.CreatePolygon(parameters.NumberOfVertices, parameters.SideLength, new Vertex(0, 0));
switch (parameters.Mode)
{
case ApplicationMode.SaveToFile:
{
SaveToFile(polygon, _fileToSaveName);
break;
}
case ApplicationMode.ConsoleDisplay:
{
Console.WriteLine(polygon.ToString());
break;
}
default:
{
WriteErrorLine("Unknown application mode.");
break;
}
}
}
catch (RegularPolygonFactoryException ex)
{
WriteErrorLine(ex.Message);
}
catch (Exception ex) //Catches any exception, because cannot handle any kind of exception differently than only inform user about it.
{
WriteErrorLine(ex.Message);
}
}