/// <summary>
/// Perform a Look search
/// </summary>
/// <param name="lookQuery">A LookQuery model for the search criteria</param>
/// <returns>A LookResult model for the search response</returns>
internal static LookResult Search(LookQuery lookQuery)
{
if (lookQuery == null)
{
return(LookResult.Error("LookQuery object was null"));
}
if (lookQuery.SearchingContext == null) // supplied by unit test to skip examine dependency
{
// attempt to get searching context from examine searcher name
lookQuery.SearchingContext = LookService.GetSearchingContext(lookQuery.SearcherName);
if (lookQuery.SearchingContext == null)
{
return(LookResult.Error("SearchingContext was null"));
}
}
if (lookQuery.Compiled == null)
{
var parsingContext = new ParsingContext(); // for building/compiling the query
try
{
LookService.ParseRawQuery(parsingContext, lookQuery);
LookService.ParseExamineQuery(parsingContext, lookQuery);
LookService.ParseNodeQuery(parsingContext, lookQuery);
LookService.ParseNameQuery(parsingContext, lookQuery);
LookService.ParseDateQuery(parsingContext, lookQuery);
LookService.ParseTextQuery(parsingContext, lookQuery);
LookService.ParseTagQuery(parsingContext, lookQuery);
LookService.ParseLocationQuery(parsingContext, lookQuery);
}
catch (ParsingException parsingException)
{
return(LookResult.Error(parsingException.Message));
}
if (parsingContext.HasQuery)
{
lookQuery.Compiled = new LookQueryCompiled(lookQuery, parsingContext);
}
else
{
return(LookResult.Error("Unable to compile query - a query clause is required")); // empty failure
}
}
TopDocs topDocs = lookQuery
.SearchingContext
.IndexSearcher
.Search(
lookQuery.Compiled.Query,
lookQuery.Compiled.Filter,
lookQuery.MaxResults,
lookQuery.Compiled.Sort);
if (topDocs.TotalHits > 0)
{
List <Facet> facets = null;
if (lookQuery.TagQuery != null && lookQuery.TagQuery.FacetOn != null)
{
facets = new List <Facet>();
Query facetQuery = lookQuery.Compiled.Filter != null
? (Query) new FilteredQuery(lookQuery.Compiled.Query, lookQuery.Compiled.Filter)
: lookQuery.Compiled.Query;
// do a facet query for each group in the array
foreach (var group in lookQuery.TagQuery.FacetOn.TagGroups)
{
var simpleFacetedSearch = new SimpleFacetedSearch(
lookQuery.SearchingContext.IndexSearcher.GetIndexReader(),
LookConstants.TagsField + group);
var facetResult = simpleFacetedSearch.Search(facetQuery);
facets.AddRange(
facetResult
.HitsPerFacet
.Select(
x => new Facet()
{
Tags = new LookTag[] { new LookTag(group, x.Name.ToString()) },
Count = Convert.ToInt32(x.HitCount)
}
));
}
}
return(new LookResult(
lookQuery,
topDocs,
facets != null ? facets.ToArray() : new Facet[] { }));
}
return(LookResult.Empty()); // empty success
}
