public SearchRequestBuilder ParseFacets(string facetPhrase)
{
if (facetPhrase == null)
{
return(this);
}
if (_phraseParser == null)
{
throw new OperationCanceledException("phrase parser must be initialized");
}
//TODO: Support aliases for Facet expressions e.g price.usd[TO 200) as price_below_200
//TODO: Need to create a new Antlr file with g4-lexer rules and generate parser especially for facets expression that will return proper AggregationRequests objects
var parseResult = _phraseParser.Parse(facetPhrase);
var aggrs = new List <AggregationRequest>();
//Term facets
if (!string.IsNullOrEmpty(parseResult.Keyword))
{
var termFacetExpressions = parseResult.Keyword.Split(" ");
aggrs.AddRange(termFacetExpressions.Select(x => new TermAggregationRequest {
FieldName = x, Id = x
}));
}
foreach (var filter in parseResult.Filters)
{
FilterSyntaxMapper.MapFilterSyntax(filter);
//Range facets
if (filter is RangeFilter rangeFilter)
{
aggrs.Add(new RangeAggregationRequest
{
Id = rangeFilter.FieldName + "range",
FieldName = rangeFilter.FieldName,
Values = rangeFilter.Values.Select(x => new RangeAggregationRequestValue
{
Id = (x.Lower ?? "*") + "-" + (x.Upper ?? "*"),
Lower = x.Lower,
Upper = x.Upper,
IncludeLower = x.IncludeLower,
IncludeUpper = x.IncludeUpper
}).ToList()
});
}
//Filter facets
if (filter is TermFilter termFilter)
{
aggrs.Add(new TermAggregationRequest {
FieldName = termFilter.FieldName, Id = termFilter.ToString(), Filter = termFilter
});
}
}
SearchRequest.Aggregations = aggrs;
return(this);
}
public SearchRequestBuilder ParseFilters(string filterPhrase)
{
if (filterPhrase == null)
{
return(this);
}
if (_phraseParser == null)
{
throw new OperationCanceledException("phrase parser must be initialized");
}
var parseResult = _phraseParser.Parse(filterPhrase);
var filters = new List <IFilter>();
foreach (var filter in parseResult.Filters)
{
FilterSyntaxMapper.MapFilterSyntax(filter);
if (filter is TermFilter termFilter)
{
var wildcardValues = termFilter.Values.Where(x => new[] { "?", "*" }.Any(x.Contains));
if (wildcardValues.Any())
{
filters.AddRange(wildcardValues.Select(x => new WildCardTermFilter {
FieldName = termFilter.FieldName, Value = x
}));
termFilter.Values = termFilter.Values.Except(wildcardValues).ToList();
}
if (termFilter.Values.Any())
{
filters.Add(termFilter);
}
}
else
{
filters.Add(filter);
}
}
((AndFilter)SearchRequest.Filter).ChildFilters.AddRange(filters);
return(this);
}
