public IndexSearchRequestBuilder ParseFacets(ISearchPhraseParser phraseParser, string facetPhrase, IList <AggregationRequest> predefinedAggregations = null)
{
if (phraseParser == null)
{
throw new ArgumentNullException(nameof(phraseParser));
}
SearchRequest.Aggregations = predefinedAggregations ?? new List <AggregationRequest>();
if (string.IsNullOrEmpty(facetPhrase))
{
return(this);
}
//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);
//Term facets
if (!string.IsNullOrEmpty(parseResult.Keyword))
{
var termFacetExpressions = parseResult.Keyword.Split(" ");
parseResult.Filters.AddRange(termFacetExpressions.Select(x => new TermFilter
{
FieldName = x,
Values = new List <string>()
}));
}
SearchRequest.Aggregations = parseResult.Filters
.Select <IFilter, AggregationRequest>(filter =>
{
FilterSyntaxMapper.MapFilterAdditionalSyntax(filter);
return(filter switch
{
RangeFilter rangeFilter => new RangeAggregationRequest
{
Id = filter.Stringify(),
FieldName = rangeFilter.FieldName,
Values = rangeFilter.Values.Select(x => new RangeAggregationRequestValue
{
Id = x.Stringify(),
Lower = x.Lower,
Upper = x.Upper,
IncludeLower = x.IncludeLower,
IncludeUpper = x.IncludeUpper
}).ToList()
},
TermFilter termFilter => new TermAggregationRequest
{
FieldName = termFilter.FieldName,
Id = filter.Stringify(),
Filter = termFilter
},
_ => null,
});
})
public IndexSearchRequestBuilder ParseFilters(ISearchPhraseParser phraseParser, string filterPhrase)
{
if (phraseParser == null)
{
throw new ArgumentNullException(nameof(phraseParser));
}
if (string.IsNullOrEmpty(filterPhrase))
{
return(this);
}
var parseResult = phraseParser.Parse(filterPhrase);
var filters = new List <IFilter>();
foreach (var filter in parseResult.Filters)
{
FilterSyntaxMapper.MapFilterAdditionalSyntax(filter);
if (filter is TermFilter termFilter)
{
var wildcardValues = termFilter.Values.Where(x => new[] { "?", "*" }.Any(x.Contains)).ToArray();
if (wildcardValues.Any())
{
var orFilter = new OrFilter
{
ChildFilters = new List <IFilter>()
};
var wildcardTermFilters = wildcardValues.Select(x => new WildCardTermFilter
{
FieldName = termFilter.FieldName,
Value = x
}).ToList();
orFilter.ChildFilters.AddRange(wildcardTermFilters);
termFilter.Values = termFilter.Values.Except(wildcardValues).ToList();
if (termFilter.Values.Any())
{
orFilter.ChildFilters.Add(termFilter);
}
filters.Add(orFilter);
}
else
{
filters.Add(termFilter);
}
}
else
{
filters.Add(filter);
}
}
AddFiltersToSearchRequest(filters.ToArray());
return(this);
}