public static IEnumerable <FilterDescriptor> SearchFilterDescriptors(CompositeFilterDescriptor root, string fieldName)
{
if (root == null)
{
return(new List <FilterDescriptor>());
}
return(FlattenCompositeFilterDescriptor(root)
.Where(x => x.Field.Trim().ToLower() == fieldName.Trim().ToLower()));
}
/// <summary>
/// Flatten out a CompositeFilterDescriptor to FilterDescriptor[]
/// </summary>
public static IEnumerable <FilterDescriptor> FlattenCompositeFilterDescriptor(CompositeFilterDescriptor root)
{
var result = new List <FilterDescriptor>();
if (root?.Filters != null)
{
// current system only support 'and'
if (root.Logic.ToLower() == "and")
{
foreach (var filterCriteria in root.Filters)
{
string json = filterCriteria.ToString();
if (json.IndexOf("logic") > -1)
{
var filterDescriptor = json.ToObject <CompositeFilterDescriptor>();
// recursive loop
result.AddRange(FlattenCompositeFilterDescriptor(filterDescriptor));
}
else
{
var filterDescriptor = json.ToObject <FilterDescriptor>();
result.Add(filterDescriptor);
}
}
}
else
{
throw new NotImplementedException("Logic not handled");
}
}
return(result);
}
