public CollectiblesViewModel(CollectiblesList list, TagsList tags)
{
SearchText = new ReactiveProperty <string>("");
AllItems = list.Collectibles.Select(item => new CollectibleViewModel(item, SearchText, tags.Tags)).ToReactiveCollection();
Func <CollectibleViewModel, CollectibleViewModel, int> sortByTitle = (a, b) => String.Compare(a.OriginalTitle, b.OriginalTitle);
Func <CollectibleViewModel, bool> filter = vm =>
{
if (string.IsNullOrEmpty(SearchText.Value))
{
return(true);
}
if (SearchText.Value.StartsWith("t:"))
{
var tag = SearchText.Value.Substring(2).ToLower();
return(vm.Tags.Any(t => t.Name.ToLower().Contains(tag)));
}
if (vm.OriginalTitle.ToLower().Contains(SearchText.Value.ToLower()))
{
return(true);
}
return(false);
};
Items = AllItems.WhereMany(filter, t => t.Tags.ObserveCountChanged().AsUnitObservable(), SearchText.AsUnitObservable()).Sort(sortByTitle, null);
SelectedItems = Items.WhereMany(vm => vm.IsSelected.Value, vm => vm.IsSelected.AsUnitObservable()).Sort(sortByTitle, null);
}