/// <summary>
/// Refreshes the queue and sets the execution timer to the first available tasks.
/// </summary>
/// <param name="state"></param>
private async void RefreshQueue(object state)
{
await _service.RefreshTasksAsync();
var result = await _service.CalculateTimespanAsync();
if (result.Expiration != TimeSpan.Zero)
{
_executionTimer = new Timer(ExecuteTask, result.UpcomingTask, TimeSpan.Zero, result.Expiration);
}
else
{
_executionTimer?.Change(Timeout.Infinite, 0);
}
}