public static AttendantsProjection RSVPDeclined(this AttendantsProjection projection, AttendantsReadModel readModel, Guid memberId)
{
projection.Project(readModel, new Events.RSVPDeclined {
MemberId = memberId, DeclinedAt = DateTime.UtcNow
});
return(projection);
}
public static void GivenPublishedMeetup(Action <AttendantsProjection, AttendantsReadModel> when, Action <AttendantsReadModel> then)
{
var projection = new AttendantsProjection();
var readModel = new AttendantsReadModel();
projection.Project(
readModel,
new Events.MeetupCreated {
Title = "EventSourcing a tope"
},
new Events.NumberOfSeatsUpdated {
NumberOfSeats = 2
},
new Events.MeetupPublished {
});
when(projection, readModel);
then(readModel);
}
public async Task Project(object @event)
{
try
{
var projection = new AttendantsProjection();
var id = (Guid)((dynamic)@event).Id;
var collection = _getDb().GetCollection<AttendantsReadModel>("attendants");
var state = await collection.Find<AttendantsReadModel>(meetup => meetup.Id == id).FirstOrDefaultAsync();
var newState = projection.Project(state ?? new AttendantsReadModel(), @event);
_logger.LogDebug($"Projecting event {@event} with id {id}, state {JsonConvert.SerializeObject(state)} and new state {JsonConvert.SerializeObject(newState)}");
await collection.ReplaceOneAsync(doc => doc.Id == id, newState, new UpdateOptions
{
IsUpsert = true
});
}
catch (Exception ex)
{
_logger.LogError($"Error {ex.Message}");
}
}