public FilterDescriptor ParseFilter(string input)
{
if (input.StartsWith("("))
{
input = input.Substring(1, input.Length - 2);
}
// Remove all of the ' characters from the string and split
var ss = input.Replace("'", "").Split('~');
var filters = new List <FilterDescriptor>(); // Used to store all of the parsed filters (one for each field)
int fIndex = -1; // Used to track filter index.
int cIndex = 0; // Used to track filter index within a composite filter object.
bool isComposite = false; // Used to indicate if a composite filter is currently being parsed.
for (var i = 0; i < ss.Length; i++)
{
if (i % 4 == 0) // Field
{
string fieldName = ss[i].Replace("(", "");
string convertedFieldName = _namingService.Convert(fieldName);
if ((i > 0 && ss[i].IndexOf('(') > -1) || (ss.Length > i + 4 && fieldName == ss[i + 4])) // We're starting a composite object
{
filters.Add(new FilterDescriptor()
{
Filters = new List <FilterDescriptor>()
}); // create a composite object and add it to the parsed filters
fIndex++; // We added an object to the array, so increment the counter.
filters[fIndex].Filters.Add(new FilterDescriptor()
{
Field = convertedFieldName
});
cIndex = 0; // We added the first filter to the composite object, so set the counter.
isComposite = true;
}
else if (isComposite)
{
// If we're parsing the second filter in a composite filter object, then add the field to the child filter.
filters[fIndex].Filters.Add(new FilterDescriptor()
{
Field = convertedFieldName
});
cIndex++; // We added the second filter to the composite object, so increment the counter.
}
else // Add the field as normal.
{
filters.Add(new FilterDescriptor()
{
Field = convertedFieldName
});
fIndex++; // We added an object to the array, so increment the counter.
}
}
if (i % 4 == 1) // Operator
{
if (isComposite)
{
filters[fIndex].Filters[cIndex].Operator = ss[i];
}
else
{
filters[fIndex].Operator = ss[i];
}
}
if (i % 4 == 2) // Value
{
string sVal = ss[i].IndexOf(')') > -1 ? ss[i].Replace(")", "") : ss[i];
object value = ParseValue(sVal);
if (i != ss.Length - 1 && ss[i].IndexOf(')') > -1)
{
filters[fIndex].Filters[cIndex].Value = value;/* ss[i].Replace(")", "");*/
isComposite = false;
}
else if (isComposite)
{
filters[fIndex].Filters[cIndex].Value = value /*ss[i]*/;
}
else
{
filters[fIndex].Value = value /*ss[i]*/;
}
}
if (i % 4 == 3) // Logic
{
if (isComposite)
{
filters[fIndex].Logic = ss[i]; // Add the logic to the composite filter object.
}
// If the filter is not composite, the logic will always be "and". So, we just don't do anything if that's the case.
}
}
return(new FilterDescriptor()
{
Filters = filters,
Logic = "and"
});
}