/// <summary>
/// Starts timer for the next reminder whici is assumed to exist
/// </summary>
protected virtual void ScheduleNextReminder(DateTime now)
{
ReminderEntity nextReminder = ActiveSortedReminders.First();
int intervalMs = GetTimeInMsUntilNextRinging(nextReminder, now);
Log.Logger.Information($"Starting NextReminderNotifier timer [Reminder name = {nextReminder.Name}, Interval = {intervalMs} ms, Scheduled at {nextReminder.ScheduledTime} UTC] ");
NextReminderTimer.Interval = intervalMs;
NextReminderTimer.Start();
}
/// <summary>
/// Updates the list of active reminders, and starts the timer if needed.
/// It is ok to call the method even when the component is disabled.
/// </summary>
/// <param name="upToDateReminders"></param>
public void UpdateReminderList(IList <ReminderEntity> upToDateReminders)
{
DateTime now = DateTime.UtcNow; //good to be constant in a variable during this analysis in method so that it doesn't change during analysis. It could make some kind of timer deadlock where timer would never ring.
//pause timer util we decide when should it ring again so that it does not make conccurency issues while we are changing the list
if (isEnabled)
{
Log.Logger.Information("Pausing NextReminderNotifier timer (if it is running at all)"); //maybe there were no events
NextReminderTimer.Stop();
}
//TODO: maybe not do this now but when needed, we can just find 1 first; keep list ordered instead of oredering it each time
ActiveSortedReminders = CloneAndSortOnlyActiveReminders(upToDateReminders);
//if scheduler is enabled continue timer (if there is need for this at all after change of reminders)
if (isEnabled)
{
TryToScheduleNextReminder(now);
}
}
protected virtual void HandleStatusChange(bool wasEnabledBefore)
{
bool startedNow = !wasEnabledBefore && isEnabled;
bool stoppedNow = wasEnabledBefore && !isEnabled;
if (startedNow)
{
DateTime now = DateTime.UtcNow;
TryToScheduleNextReminder(now);
Log.Logger.Information($"Started NextReminderNotifier");
}
else if (stoppedNow)
{
NextReminderTimer.Stop();
Log.Logger.Information($"Stopped NextReminderNotifier");
}
else
{
Log.Logger.Information($"NextReminderNotifier already {(isEnabled ? "started" : "stopped")}");
}
}
