/// <summary>
/// Performs a lucene search using Examine.
/// </summary>
/// <param name="documentTypes">Document type aliases to search for.</param>
/// <param name="searchGroups">A list of search groupings, if you have more than one group it will apply an and to the search criteria</param>
/// <param name="sortFields">optional sort fields.</param>
/// <param name="sortDescending">sort direction</param>
/// <returns>Examine search results</returns>
public ISearchResults Search(IEnumerable <string> documentTypes, IEnumerable <SearchGroup> searchGroups, IEnumerable <string> sortFields = null, bool sortDescending = false)
{
var searchManager = ExamineManager.Instance; // uses the default providers
ISearchCriteria searchCriteria = searchManager.CreateSearchCriteria(BooleanOperation.And);
IBooleanOperation queryNodes;
// initialize query
if (sortFields == null)
{
queryNodes = searchCriteria.GroupedNot(new string[] { "__ignoreMe" }, new string[] { "ignoreMe" });
}
else if (sortDescending)
{
queryNodes = searchCriteria.OrderByDescending(sortFields.ToArray());
}
else
{
queryNodes = searchCriteria.OrderBy(sortFields.ToArray());
}
if (documentTypes?.Any() == true)
{
//only get results for documents of a certain type
queryNodes = queryNodes.And().GroupedOr(new string[] { Constants.PropertyAlias.NodeTypeAlias }, documentTypes.ToArray());
}
if (searchGroups?.Any() == true)
{
//in each search group it looks for a match where the specified fields contain any of the specified search terms
//usually would only have 1 search group, unless you want to filter out further, i.e. using categories as well as search terms
foreach (SearchGroup searchGroup in searchGroups)
{
queryNodes = queryNodes.And().GroupedOr(searchGroup.FieldsToSearchIn, searchGroup.SearchTerms.ToArray());
}
}
var compileQuery = queryNodes.Compile();
//return the results of the search
return(searchManager.Search(compileQuery));
}
