public SearchFacetsViewModel(MessageBus messageBus)
{
MessageBus = messageBus ?? throw new ArgumentNullException("messageBus");
MessageBus.Subscribe <ServerSettingsChangedMessage>(m =>
{
if (m.ServiceModel == null)
{
SelectedFacets.Clear();
Facets.Clear();
}
});
MessageBus.Subscribe <BuildSearchMessage>(m =>
{
SelectedFacets = Facets.SelectMany(f => f.Values).Where(v => v.Selected).ToList(); // save selected facets
SelectedFacets.ForEach(v => m.Query.AddFacetValue(v.FacetName, v.ValueName)); // add facets to query
});
MessageBus.Subscribe <EndSearchMessage>(m =>
{
if (m.Results.ReturnOptions.HasFlag(ReturnOptions.Facets))
{
Facets.Clear();
foreach (var facet in m.Results.Facets.Values)
{
var viewModel = new FacetViewModel(facet);
viewModel.Values.ToList().ForEach(fv => fv.Selected = SelectedFacets.Any(sf => sf.Equals(fv)));
Facets.Add(viewModel);
}
}
});
Facets = new ObservableCollection <FacetViewModel>();
SelectedFacets = new List <FacetValueViewModel>();
}
