/// <inheritdoc />
public override Expression <Func <Event, bool> > GetFilterExpression()
{
var parameterReplacer = new ParameterReplacer();
var filterExpression = _specification.GetFilterExpression();
var parameter = Expression.Parameter(typeof(Event));
var result = Expression.Lambda <Func <Event, bool> >(
Expression.Not(
parameterReplacer.ReplaceParameterWith(parameter, filterExpression.Body)
),
parameter);
return(result);
}
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);
}