private static bool GetInputFile(out string inputFileName)
{
inputFileName = IO.ReadLine("Input file: ");
if (inputFileName == string.Empty)
{
IO.WriteLineError("No input file provided.");
return(false);
}
try
{
new FileInfo(inputFileName);
}
catch (ArgumentException)
{
IO.WriteLineError("Invalid file name!");
return(false);
}
catch (Exception e)
{
IO.WriteLineError(e.Message);
return(false);
}
return(true);
}
private static void GenerateRandomExpression()
{
int resultLower, resultUpper, numberOfExpressions, numberOfOperandsLower, numberOfOperandsUpper;
string outFileName;
while (!GetDesiredResult(out resultLower, out resultUpper))
{
;
}
while (!GetNumberOfOperands(out numberOfOperandsLower, out numberOfOperandsUpper))
{
;
}
while (!GetNumberOfExpressionsToGenerate(out numberOfExpressions))
{
;
}
while (!GetOutputFile(out outFileName))
{
;
}
IO.RedirectOutputToFile(outFileName, FileMode.Create);
for (int i = 0; i < numberOfExpressions; i++)
{
int goal = ExpressionGenerator.Random.Next(resultLower, resultUpper + 1);
int numberOfOperands = ExpressionGenerator.Random.Next(numberOfOperandsLower, numberOfOperandsUpper + 1);
IO.WriteLine(_generator.BuildExpression(goal, numberOfOperands));
}
IO.RedirectOutputToConsole();
}
private static void GenerateExpressionsFromFormat()
{
if (_formats.Count == 0)
{
IO.WriteLineError("There are no formats specified!");
return;
}
int resultLower, resultUpper, numberOfExpressions;
string outFileName;
while (!GetDesiredResult(out resultLower, out resultUpper))
{
;
}
while (!GetNumberOfExpressionsToGenerate(out numberOfExpressions))
{
;
}
while (!GetOutputFile(out outFileName))
{
;
}
IO.RedirectOutputToFile(outFileName, FileMode.Create);
for (int i = 0; i < numberOfExpressions; i++)
{
int goal = ExpressionGenerator.Random.Next(resultLower, resultUpper + 1);
var format = _formats.GetRandomElement();
IO.WriteLine(_generator.FromFormat(format, goal));
}
IO.RedirectOutputToConsole();
}
private static void ShowMenu()
{
foreach (var item in _menuItems)
{
IO.WriteLine("`{0}`. {1}", item.Id, item.Description);
}
IO.WriteLine("");
}
private static void AddNewFormat()
{
string format = IO.ReadLine("Enter a format: ", removeWhiteSpace: false); // [[5]]
if (AddNewFormat(format))
{
IO.WriteLineSuccess("Format added successfully.");
}
}
private static bool GetNumberOfExpressionsToGenerate(out int number)
{
string input = IO.ReadLine("Number of expressions to generate: ");
if (!int.TryParse(input, out number))
{
IO.WriteLineError("You must enter a number!");
return(false);
}
return(true);
}
private static void ParseInput()
{
string input = IO.ReadLine("Your choice: ");
Action action;
if (!_actions.TryGetValue(input, out action))
{
IO.WriteLineError("Invalid input!");
return;
}
action();
}
private static bool GetNumberOfOperands(out int lower, out int upper)
{
lower = upper = -1;
string input = IO.ReadLine("Desired number of operands in each expression (one number for exact number of operands, two numbers for a range): ",
removeWhiteSpace: false);
var args = input.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (args.Length == 0)
{
IO.WriteLineError("You must enter at least one number!");
return(false);
}
else if (args.Length == 1)
{
int result;
if (!int.TryParse(args[0], out result))
{
IO.WriteLineError("You must enter a number!");
return(false);
}
if (result < 2)
{
IO.WriteLineError("There must be at least two operands!");
return(false);
}
lower = upper = result;
}
else if (args.Length == 2)
{
if (!int.TryParse(args[0], out lower) || !int.TryParse(args[1], out upper))
{
IO.WriteLineError("You must enter a number!");
return(false);
}
if (upper < lower)
{
MathHelper.Swap(ref lower, ref upper);
}
if (lower < 2 || upper < 2)
{
IO.WriteLineError("There must be at least two operands!");
return(false);
}
}
else
{
IO.WriteLineError("Too many numbers provided!");
return(false);
}
return(true);
}
private static void ShowExistingFormats()
{
if (_formats.Count == 0)
{
IO.WriteLineWarning("No formats found.");
return;
}
foreach (var format in _formats.OrderBy(x => x.Index))
{
IO.WriteLine($"{format.Index}: {format.Format}");
}
}
private static bool AddNewFormat(string format)
{
format = Regex.Replace(format, @"\s+", "");
if (format.Length < 3 || !_formatRegex.IsMatch(format))
{
IO.WriteLineError("Format '{0}' is invalid!", format);
return(false);
}
if (!_formats.Add(new ExpressionFormat(format)))
{
IO.WriteLineError("Format '{0}' already exists!", format);
return(false);
}
return(true);
}
private static bool GetOutputFile(out string outFileName)
{
outFileName = IO.ReadLine("Output file (leave blank if you want console output): ");
if (outFileName != "")
{
try
{
new FileInfo(outFileName);
}
catch (ArgumentException)
{
IO.WriteLineError("Invalid file name!");
return(false);
}
catch (Exception e)
{
IO.WriteLineError(e.Message);
return(false);
}
}
return(true);
}
private static void RemoveFormat()
{
string input = IO.ReadLine("Id of format to remove: ");
int id;
if (!int.TryParse(input, out id))
{
IO.WriteLineError("You must enter a number!");
return;
}
int removed = _formats.RemoveWhere(x => x.Index == id); //[[12]]
if (removed == 0)
{
IO.WriteLineError("No formats with the specified ID found!");
}
else
{
IO.WriteLineSuccess("Format removed successfully.");
}
}
private static void LoadFormatsFromFile()
{
string fileName;
while (!GetInputFile(out fileName))
{
;
}
if (!File.Exists(fileName))
{
IO.WriteLineError("The specified file could not be found.");
return;
}
string[] lines = File.ReadAllLines(fileName).Where(x => !string.IsNullOrWhiteSpace(x)).ToArray();
foreach (string line in lines)
{
if (!AddNewFormat(line))
{
return;
}
}
IO.WriteLineSuccess("All formats added successfully.");
}