public ExperimentManager (params Type[] experimentRegistries)
{
experiments = new List<Experiment> (FindExperiments (experimentRegistries));
// Restore currentExperiment
var id = ServiceContainer.Resolve<ISettingsStore> ().ExperimentId;
if (id != null) {
currentExperiment = experiments.FirstOrDefault (e => e.Id == id);
}
}
private static bool IsValid (Experiment e)
{
if (e == null || !e.Enabled) {
return false;
}
var now = Time.UtcNow;
if (e.StartTime != null && e.StartTime.ToUtc() > now) {
return false;
}
if (e.EndTime != null && e.EndTime.ToUtc() < now) {
return false;
}
return true;
}
public void NextExperiment (bool isFreshInstall)
{
// If the current experiment is still valid, do nothing.
if (IsValid (CurrentExperiment)) {
return;
}
var validExperiments = GetPossibleNextExperiments (isFreshInstall);
// Choose experiment or no experiment. Equal probability of any outcome.
var idx = RandomNumber (validExperiments.Count + 1);
if (idx < validExperiments.Count) {
CurrentExperiment = validExperiments [idx];
} else {
CurrentExperiment = null;
}
}