private static async Task <ScheduledCommand> GetStoredScheduledCommand <TAggregate>(
IScheduledCommand <TAggregate> scheduledCommand,
CommandSchedulerDbContext db,
Guid scheduledCommandGuid) where TAggregate : class
{
var sequenceNumber = scheduledCommand
.IfTypeIs <IEvent>()
.Then(c => c.SequenceNumber)
.Else(() => scheduledCommand
.IfTypeIs <ScheduledCommand <TAggregate> >()
.Then(c => c.SequenceNumber))
.ElseThrow(() => new InvalidOperationException("Cannot look up stored scheduled command based on a " + scheduledCommand.GetType()));
var storedCommand = await db.ScheduledCommands
.SingleOrDefaultAsync(
c => c.AggregateId == scheduledCommandGuid &&
c.SequenceNumber == sequenceNumber);
return(storedCommand);
}
