private static bool EvaluateModeAnswer(DiatonicMode mode, Guitar guitar, int stringNumber, int position, int[][] fretNumbers, string answer)
{
var pitch = guitar.GetPitch(stringNumber, position + fretNumbers[0][0]);
var combinations =
from keyNote in new[] { pitch.Note, pitch.Note.Invert() }.Distinct()
from modeName in new[] { mode.GetName(), mode.GetAlternativeName() }.Distinct()
select $"{keyNote.ToString().ToLowerInvariant()} {modeName.ToLowerInvariant()}";
return(combinations.Contains(answer));
}
private static void PrintExcercise(Guitar guitar, int stringNumber, int[][] fretNumbers, int maxFretNumber, int questionStringIndex, int questionFretIndex, int position)
{
var questionStringNumber = stringNumber + questionStringIndex;
var sb = new StringBuilder();
var stringFrets = new bool[maxFretNumber + 1];
for (var i = guitar.NumberOfStrings - 1; i >= 0; i--)
{
sb.Clear();
Array.Clear(stringFrets, 0, stringFrets.Length);
int fretNumberIndex = i - stringNumber;
int[] stringFretNumbers;
if (0 <= fretNumberIndex && fretNumberIndex < fretNumbers.Length)
{
stringFretNumbers = fretNumbers[fretNumberIndex];
for (var j = 0; j < stringFretNumbers.Length; j++)
{
stringFrets[stringFretNumbers[j]] = true;
}
}
else
{
stringFretNumbers = null;
}
sb.Append(guitar.GetPitch(i, 0).Note.ToString().PadRight(3)).Append('-').Append('|');
for (var j = 0; j < stringFrets.Length; j++)
{
sb.Append('-');
if (!stringFrets[j])
{
sb.Append('-');
}
else if (i == questionStringNumber && j == stringFretNumbers[questionFretIndex])
{
sb.Append('?');
}
else
{
sb.Append('O');
}
sb.Append('-').Append('|');
}
sb.Append('-');
Console.WriteLine(sb.ToString());
}
Console.WriteLine(new string(' ', 5) + position.ToString().PadLeft(2));
}