/// <summary>
/// Adds another score to this one
/// </summary>
/// <param name="other"></param>
public void CombineWith(GameResults other)
{
foreach (var score in other.Scores)
{
if (Scores.ContainsKey(score.Key))
{
Scores[score.Key] += score.Value;
}
else
{
Scores.Add(score.Key, score.Value);
}
}
}
/// <summary>
/// Listen to messages coming from users, and end as soon as someone types the correct answer, or the question
/// times out.
/// When someone gets the correct answer, has a 1 second grace period so that multiple people guessing the
/// answer at the same time will all get points.
/// </summary>
/// <param name="chat"></param>
/// <param name="maxDuration"></param>
/// <returns>A list of users and how many points they got,</returns>
public async Task <GameResults> ExecuteQuestion(IObservable <DiscordMessage> chat, TimeSpan maxDuration)
{
if (maxDuration.TotalSeconds < 2)
{
throw new InvalidOperationException($"The timespan must be greater than 2 seconds, but was {maxDuration.TotalSeconds} seconds");
}
var result = new GameResults();
var waitHandle = new SemaphoreSlim(1);
var cancellationTokenSource = new CancellationTokenSource();
bool phase1 = true; // When this is true the round ends when the first person gets the question right,
// when it is false we are in the 1 second grace period
await waitHandle.WaitAsync(); // Take the wait handle and wait for the observable to release it
// Subscribe to incoming answers from users
_subscription = chat.ObserveOn(_scheduler).Subscribe(message =>
{
if (IsAnswerCorrect(message.MessageText))
{
// Someone was correct,
result.AddScore(message.UserName, Points);
if (phase1)
{
cancellationTokenSource.Cancel();
waitHandle.Release();
}
}
});
//PHASE 1 - get the first correct answer and end
//Release the lock after the time has run out
Task doAfter = TimerUtils.TimerUtils.DoAfter(() => waitHandle.Release(),
(int)maxDuration.Subtract(TimeSpan.FromSeconds(1)).TotalMilliseconds,
cancellationTokenSource.Token);
await waitHandle.WaitAsync();
phase1 = false;
//PHASE 2 - always lasts for 1 second and add all answers
await Task.Delay(1);
return(result);
}