public async Task <IReadOnlyList <Event <string, string> > > GetEventsAsync(EventsSpecification specification = null)
{
IQueryable <Event> query = _db.Events;
if (specification != null)
{
query = query.Where(specification.GetFilterExpression());
}
var eventsInfo = await query.ToArrayAsync();
var events = new List <Event <string, string> >(eventsInfo.Length);
if (eventsInfo.Length == 0)
{
return(events);
}
var placesRepository = new PlacesRepository(_db);
var places = await placesRepository.GetPlacesAsync();
foreach (var eventInfo in eventsInfo)
{
var startDate = GetStartDate(eventInfo);
var endDate = GetEndDate(eventInfo);
var @event = new Event <string, string>(eventInfo.Content, startDate, endDate)
{
Id = eventInfo.Id
};
if (eventInfo.PlaceId != null)
{
@event.Place = places.GetNodeById(eventInfo.PlaceId);
}
events.Add(@event);
}
return(events);
}
/// <summary> /// Reverts specification. /// </summary> /// <param name="spec">Specification.</param> public static EventsSpecification Not(EventsSpecification spec) => new NotEventsSpecification(spec);
/// <summary> /// Combines this specification with another one /// using AND operator. /// </summary> /// <param name="anotherSpec">Another specification.</param> public EventsSpecification And(EventsSpecification anotherSpec) => new AndEventsSpecification(this, anotherSpec);
/// <summary> /// Combines this specification with another one /// using OR operator. /// </summary> /// <param name="anotherSpec">Another specification.</param> public EventsSpecification Or(EventsSpecification anotherSpec) => new OrEventsSpecification(this, anotherSpec);
public NotEventsSpecification(EventsSpecification specification)
{
_specification = specification ?? throw new ArgumentNullException(nameof(specification));
}