public static PredefinedFilterCollection GetPredefinedFilters(MediaType mediaType, string fieldName)
{
string key = GetFilterKey(mediaType, fieldName);
if (PredefinedFilterCache.ContainsKey(key))
{
return(PredefinedFilterCache[key]);
}
PredefinedFilterCollection predefinedFilters = null;
IEnumerable <string> uniqueValues = GetUniqueValues(mediaType, fieldName);
if (uniqueValues != null)
{
predefinedFilters = new PredefinedFilterCollection();
PredefinedFilterCache.Add(key, predefinedFilters);
foreach (string value in uniqueValues)
{
PredefinedFilter predefinedFilter = new PredefinedFilter {
Name = value
};
predefinedFilter.Filter = CriteriaOperator.Parse(String.Format("Contains([{0}], '{1}')", fieldName, value.Replace("'", "''")));
predefinedFilters.Add(predefinedFilter);
}
}
return(predefinedFilters);
}
static FilterHelper()
{
Messenger.Default.Register(listener, (CultureChangeMessage message) =>
{
UniqueValuesCache.Remove("Movie_GenreIds");
UniqueValuesCache.Remove("Tv_GenreIds");
PredefinedFilterCache.Remove("Movie_GenreIds");
PredefinedFilterCache.Remove("Tv_GenreIds");
});
App.Repository.Movies.CollectionChanged += (s, e) =>
{
if (e.Action == NotifyCollectionChangedAction.Add || e.Action == NotifyCollectionChangedAction.Remove)
{
List <string> expiredKeys = PredefinedFilterCache.Keys.Where(x => x.StartsWith("Movie_") && !x.EndsWith("GenreIds")).ToList();
foreach (string key in expiredKeys)
{
UniqueValuesCache.Remove(key);
PredefinedFilterCache.Remove(key);
}
}
};
App.Repository.TvShows.CollectionChanged += (s, e) =>
{
if (e.Action == NotifyCollectionChangedAction.Add || e.Action == NotifyCollectionChangedAction.Remove)
{
List <string> expiredKeys = PredefinedFilterCache.Keys.Where(x => x.StartsWith("Tv_") && !x.EndsWith("GenreIds")).ToList();
foreach (string key in expiredKeys)
{
UniqueValuesCache.Remove(key);
PredefinedFilterCache.Remove(key);
}
}
};
}
