public AttendeesListReadModel Project(AttendeesListReadModel readModel, params object[] events)
{
foreach (var ev in events)
{
readModel = When(readModel, ev);
}
return(readModel);
}
private AttendeesListReadModel When(AttendeesListReadModel readModel, object ev)
{
switch (ev)
{
case Events.MeetupCreated created:
readModel.Id = created.MeetupId;
break;
case Events.NumberOfSeatsUpdated seats:
readModel.MeetupCapacity = seats.NumberOfSeats;
break;
case Events.RSVPAccepted accepted:
if (readModel.MeetupFull)
{
readModel.WaitingList.Add(accepted.MemberId);
}
else
{
readModel.MembersGoing.Add(accepted.MemberId);
}
break;
case Events.RSVPDeclined declined:
readModel.MembersNotGoing.Add(declined.MemberId);
if (readModel.MembersGoing.Contains(declined.MemberId))
{
if (readModel.WaitingList.Count() > 0)
{
var memberWaiting = readModel.WaitingList.First();
readModel.MembersGoing.Add(memberWaiting);
readModel.WaitingList.Remove(memberWaiting);
}
readModel.MembersGoing.Remove(declined.MemberId);
}
break;
}
return(readModel);
}
