public async Task <EventsSet <string, string> > GetEventsSetAsync(int id)
{
var eventsSet = await _db.EventSets.FindAsync(id);
if (eventsSet == null)
{
return(null);
}
var result = new EventsSet <string, string>(eventsSet.Name)
{
Id = eventsSet.Id
};
var eventIdsInSet = await _db.EventsInSets
.Where(i => i.SetId == id)
.Select(i => i.EventId)
.ToArrayAsync();
var eventsRepo = new EventsRepository(_db);
var eventsInSet = await eventsRepo.GetEventsAsync(Ids(eventIdsInSet));
result.Add(eventsInSet.ToArray());
return(result);
}
public async Task SaveEventsSetsAsync(params EventsSet <string, string>[] eventsSets)
{
if (eventsSets is null)
{
throw new ArgumentNullException(nameof(eventsSets));
}
foreach (var eventsSet in eventsSets)
{
if (eventsSet is null)
{
throw new ArgumentException("Events sets should not be null", nameof(eventsSets));
}
// Save all events in the set
var eventsRepo = new EventsRepository(_db);
await eventsRepo.SaveEventsAsync(eventsSet.Events);
// Save events set
EventsSet eventsSetForStorage;
if (eventsSet.Id.HasValue)
{
var trackedEventsSet = _db.ChangeTracker.Entries <EventsSet>().FirstOrDefault(e => e.Entity.Id == eventsSet.Id.Value);
if (trackedEventsSet != null)
{
trackedEventsSet.State = EntityState.Detached;
}
eventsSetForStorage = new EventsSet
{
Id = eventsSet.Id.Value,
Name = eventsSet.Name
};
_db.Entry(eventsSetForStorage).State = EntityState.Modified;
}
else
{
eventsSetForStorage = new EventsSet
{
Name = eventsSet.Name
};
_db.Entry(eventsSetForStorage).State = EntityState.Added;
}
await _db.SaveChangesAsync();
eventsSet.Id = eventsSetForStorage.Id;
// Save events correspondence
_db.RemoveRange(_db.EventsInSets.Where(i => i.SetId == eventsSetForStorage.Id));
foreach (var @event in eventsSet.Events)
{
_db.EventsInSets.Add(new EventInSet
{
SetId = eventsSetForStorage.Id,
EventId = @event.Id.Value
});
}
await _db.SaveChangesAsync();
}
}
