public static KeySignature Parse(string input)
{
var inputArr = input.Split(' ');
var tonicAndAccidentalArr = inputArr[0].ToCharArray();
if (inputArr.Length == 2 &&
(tonicAndAccidentalArr.Length == 2 ||
tonicAndAccidentalArr.Length == 1))
{
var tonic = char.ToUpper(tonicAndAccidentalArr[0]);
var accidental = tonicAndAccidentalArr.Length == 2 ? tonicAndAccidentalArr[1].ToString() : "";
var mode = inputArr[1].ToLower().FirstCharToUpper();
if (Scale.Contains(tonic) && Accidentals.Contains(accidental) &&
Modes.Contains(mode))
{
return(new KeySignature(tonic, accidental, mode));
}
else
{
Console.WriteLine($"One or more parts of '{input}' are not valid. Ensure your key signature has no double sharps or double flats.");
}
}
else
{
Console.WriteLine($"'{input}' is not a valid key signature. Must contain a tonic and mode separated by a space. (e.g., Bb Major)");
}
return(null);
}
