private static bool GreaterThanOrFalse(ExpressionType nodeType, object member, Property property, object value)
{
var serializedMember = SearchFilter.GetValue(property, FilterOperator.GreaterThan, member);
var serializedValue = SearchFilter.GetValue(property, FilterOperator.GreaterThan, value);
double serializedMemberVal;
double serializedValueVal;
if (double.TryParse(serializedMember, out serializedMemberVal))
{
if (double.TryParse(serializedValue, out serializedValueVal))
{
if (nodeType == ExpressionType.GreaterThan)
{
return(serializedMemberVal > serializedValueVal);
}
else
{
return(serializedMemberVal < serializedValueVal);
}
}
}
return(false);
}
private void RemoveInvalidFilters()
{
foreach (var set in FilterSets)
{
var remove = new List <SearchFilter>();
foreach (var filter in set)
{
var attrib = filter.Property.GetEnumAttribute <FilterHandlerAttribute>();
if (attrib != null)
{
FilterOperator op = filter.Operator;
string value = SearchFilter.GetValue(filter.Property, filter.Operator, filter.Value);
if (!attrib.Handler.TryFilter(op, value))
{
if (strict)
{
if (attrib.Handler.Unsupported)
{
throw Error.UnsupportedProperty(filter.Property);
}
throw Error.InvalidFilterValue(filter.Property, op, filter.Value.ToString(), attrib.Handler.ValidDescription);
}
remove.Add(filter);
}
}
}
foreach (var r in remove)
{
set.Remove(r);
}
}
}
public async Task <List <Conference> > GetConferencesAsync(SearchFilter filter = null)
{
var queryString = QueryString.Create(filter.GetValue());
return((await _httpClient.GetFromJsonAsync <ConferencesResponse>("conferences" + queryString.ToUriComponent())).Conferences);
}
private Expression SerializeValue(object value, Property property, FilterOperator op)
{
var serialized = SearchFilter.GetValue(property, op, value);
return(Expression.Constant(serialized));
}