/// <summary>
/// Removes a timer from the EventTimer database by its <paramref name="TimerTracker"/> token.
/// </summary>
/// <remarks>This function removes the timer given by its <paramref name="TimerTracker"/> from the database completely.</remarks>
/// <param name="TimerTracker">The unique identifier of the target EventTimer.</param>
public void RemoveTimer(string TimerTracker)
{
EventTimer Timer = EventTimersDB.EventTimers.Find(TimerTracker);
if (Timer != null)
{
EventTimersDB.EventTimers.Remove(Timer);
}
EventTimersDB.SaveChanges();
}
/// <summary>
/// Loops through all events and checks if any of them are set to be triggered once (Expire) or periodically (Interval).
/// </summary>
/// <returns>A <c>Task</c> object, which can be awaited until this method completes successfully.</returns>
public async Task LoopThroughEvents()
{
long CurrentTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
await EventTimersDB.EventTimers.AsQueryable().Where(Timer => Timer.ExpirationTime <= CurrentTime)
.ForEachAsync(async(EventTimer Timer) => {
switch (Timer.TimerType)
{
case TimerType.Expire:
EventTimersDB.EventTimers.Remove(Timer);
break;
case TimerType.Interval:
Timer.ExpirationTime = Timer.ExpirationLength + DateTimeOffset.UtcNow.ToUnixTimeSeconds();
break;
}
EventTimersDB.SaveChanges();
Dictionary <string, string> Parameters = JsonConvert.DeserializeObject <Dictionary <string, string> >(Timer.CallbackParameters);
Type Class = Assembly.GetExecutingAssembly().GetTypes().Where(Type => Type.Name.Equals(Timer.CallbackClass)).FirstOrDefault();
if (Class != null)
{
if (Class.GetMethod(Timer.CallbackMethod) == null)
{
throw new NoNullAllowedException("The callback method specified for the admin confirmation is null! This could very well be due to the method being private.");
}
try {
await(Task) Class.GetMethod(Timer.CallbackMethod)
.Invoke(ServiceProvider.GetRequiredService(Class), new object[1] {
Parameters
});
} catch (Exception Exception) {
await LoggingService.LogMessageAsync(
new LogMessage(LogSeverity.Error, GetType().Name, Exception.Message, exception: Exception)
);
}
}
else if (Timer.TimerType == TimerType.Interval)
{
EventTimersDB.EventTimers.Remove(Timer);
}
});
}
/// <summary>
/// Creates a new timer object and adds it to the corresponding database.
/// </summary>
/// <param name="JSON">JSON-formatted string-string Dictionary codifying the parameters to pass to <paramref name="ClassName"/>.<paramref name="MethodName"/>()</param>
/// <param name="ClassName">The name of the class containing <paramref name="MethodName"/>.</param>
/// <param name="MethodName">The name of the method to call when the event is triggered.</param>
/// <param name="SecondsTillExpiration">Time until the event expires (Expire) or triggers (Interval).</param>
/// <param name="TimerType">Whether the timer is a single-trigger timer (Expire) or triggers every set number of <paramref name="SecondsTillExpiration"/> (Interval).</param>
/// <returns>A <c>Task</c> object, which can be awaited until this method completes successfully.</returns>
public async Task <string> AddTimer(string JSON, string ClassName, string MethodName, int SecondsTillExpiration, TimerType TimerType)
{
string Token = CreateToken();
EventTimer Timer = new () {
Token = Token,
ExpirationLength = SecondsTillExpiration,
CallbackClass = ClassName,
CallbackMethod = MethodName,
CallbackParameters = JSON,
ExpirationTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds() + (TimerType != TimerType.Interval ? SecondsTillExpiration : 0),
TimerType = TimerType
};
EventTimersDB.EventTimers.Add(Timer);
await EventTimersDB.SaveChangesAsync();
return(Timer.Token);
}
