public override async Task <ICollection <FilterValue> > GetAvailableValuesAsync(IEnumerable <Guid> necessaryMIATypeIds, IFilter selectAttributeFilter, IFilter filter)
{
IContentDirectory cd = ServiceRegistration.Get <IServerConnectionManager>().ContentDirectory;
if (cd == null)
{
throw new NotConnectedException("The MediaLibrary is not connected");
}
bool showVirtual = VirtualMediaHelper.ShowVirtualMedia(necessaryMIATypeIds);
ViewSettings settings = ServiceRegistration.Get <ISettingsManager>().Load <ViewSettings>();
IGenreConverter converter = ServiceRegistration.Get <IGenreConverter>();
Dictionary <int, FilterValue> genredFilters = new Dictionary <int, FilterValue>();
List <FilterValue> ungenredFilters = new List <FilterValue>();
if (_necessaryMIATypeIds != null)
{
necessaryMIATypeIds = _necessaryMIATypeIds;
}
HomogenousMap valueGroups = null;
HomogenousMap valueKeys = null;
if (_keyAttributeType != null)
{
Tuple <HomogenousMap, HomogenousMap> values = await cd.GetKeyValueGroupsAsync(_keyAttributeType, _valueAttributeType, selectAttributeFilter, ProjectionFunction.None, necessaryMIATypeIds, filter, true, showVirtual);
valueGroups = values.Item1;
valueKeys = values.Item2;
}
else
{
valueGroups = await cd.GetValueGroupsAsync(_valueAttributeType, selectAttributeFilter, ProjectionFunction.None, necessaryMIATypeIds, filter, true, showVirtual);
}
IList <FilterValue> result = new List <FilterValue>(valueGroups.Count);
int numEmptyEntries = 0;
foreach (KeyValuePair <object, object> group in valueGroups)
{
string name = GetDisplayName(group.Key);
if (name == string.Empty)
{
numEmptyEntries += (int)group.Value;
}
else if (!string.IsNullOrEmpty(_genreCategory) && settings.UseLocalizedGenres)
{
int?genreId = valueKeys[group.Key] as int?;
if (!genreId.HasValue)
{
ungenredFilters.Add(new FilterValue(valueKeys[group.Key], name, new RelationalFilter(_valueAttributeType, RelationalOperator.EQ, group.Key), null, (int)group.Value, this));
}
else if (!genredFilters.ContainsKey(genreId.Value))
{
if (converter.GetGenreName(genreId.Value, _genreCategory, null, out string genreName))
{
name = genreName;
}
genredFilters.Add(genreId.Value, new FilterValue(genreId.Value, name, new RelationalFilter(_valueAttributeType, RelationalOperator.EQ, group.Key), null, (int)group.Value, this));
}
else
{
genredFilters[genreId.Value] = new FilterValue(genreId.Value, genredFilters[genreId.Value].Title,
BooleanCombinationFilter.CombineFilters(BooleanOperator.Or, genredFilters[genreId.Value].Filter, new RelationalFilter(_valueAttributeType, RelationalOperator.EQ, group.Key)), null,
genredFilters[genreId.Value].NumItems.Value + (int)group.Value, this);
}
}
else
{
result.Add(new FilterValue(valueKeys[group.Key], name, new RelationalFilter(_valueAttributeType, RelationalOperator.EQ, group.Key), null, (int)group.Value, this));
}
}
foreach (var gf in genredFilters.Values)
{
result.Add(gf);
}
foreach (var ugf in ungenredFilters)
{
result.Add(ugf);
}
if (numEmptyEntries > 0)
{
result.Insert(0, new FilterValue(Consts.RES_VALUE_EMPTY_TITLE, new EmptyFilter(_valueAttributeType), null, numEmptyEntries, this));
}
return(result);
}
