private static async Task <PromptResult> ReadAnswerFromStenoDeviceAsync(TermModel term)
{
string[] strokesAsSteno = term.Steno.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
var strokes = new List <Stroke>();
var cancellationTokenSource = new CancellationTokenSource();
IDisposable strokesReceived = _stenoDevice.StrokeReceived.Subscribe(
stroke =>
{
strokes.Add(stroke);
if (strokes.Count == strokesAsSteno.Length)
{
cancellationTokenSource.Cancel();
}
});
_stenoDevice.StartReadingStrokes();
try
{
while (!cancellationTokenSource.IsCancellationRequested)
{
try
{
await Task.Delay(TimeSpan.FromSeconds(1), cancellationTokenSource.Token);
}
catch (TaskCanceledException)
{
}
}
}
finally
{
strokesReceived.Dispose();
_stenoDevice.StopReadingStrokes();
}
string steno = strokes.Count == 1 ? $"/{strokes[0].Steno}" : string.Join("/", strokes.Select(x => x.Steno));
Console.WriteLine(steno);
return(PromptResult.Success(steno));
}
private static Task <PromptResult> ReadAnswerFromConsoleAsync(TermModel term)
{
string line = Console.ReadLine();
return(Task.FromResult(string.IsNullOrEmpty(line) ? PromptResult.Canceled() : PromptResult.Success(line)));
}
private static async Task QuizAsync(
IEnumerable <LessonModel> lessons,
string questionPrompt,
string answerPrompt,
Func <TermModel, string> questionDelegate,
Func <TermModel, string> answerDelegate,
Func <TermModel, Task <PromptResult> > promptDelegate,
StringComparison comparisonType)
{
lessons = lessons.ToArray();
TermModel[] terms = lessons.SelectMany(x => x.Terms).ToArray();
var random = new Random();
var correctAnswers = 0;
var totalAnswerAttempts = 0;
TermModel term = terms[random.Next(0, terms.Length)];
while (true)
{
Console.Clear();
Console.WriteLine($"Lesson{(lessons.Count() != 1 ? "s" : "")}: {string.Join(", ", lessons.Select(x => x.Name))}");
Console.WriteLine();
if (totalAnswerAttempts > 0)
{
Console.WriteLine($"{correctAnswers} / {totalAnswerAttempts} = {(correctAnswers / (decimal)totalAnswerAttempts * 100).ToString("#0.0")}%");
Console.WriteLine();
}
Console.WriteLine($"{questionPrompt}: {questionDelegate(term)}");
Console.Write($"{answerPrompt}: ");
PromptResult result = await promptDelegate(term);
if (result.Type == PromptResultType.Canceled)
{
Console.Clear();
return;
}
if (string.IsNullOrEmpty(result.Answer))
{
continue;
}
bool correct = string.Equals(result.Answer, answerDelegate(term), comparisonType);
correctAnswers += correct ? 1 : 0;
totalAnswerAttempts++;
Console.WriteLine();
using (new ConsoleColorContext(correct ? ConsoleColor.Green : ConsoleColor.Red))
{
Console.WriteLine(correct ? "Correct!" : "Incorrect");
}
Thread.Sleep(TimeSpan.FromSeconds(2));
if (correct)
{
term = terms[random.Next(0, terms.Length)];
}
}
}
