/**
* Helper method for building hierarchical facets:
* Convert facet list to a hierarchical array
*
* @param string $facet Facet name
* @param array $facetList Facet list
* @param UrlHelper $urlHelper Query URL helper for building facet URLs
*
* @return array Facet hierarchy
*/
public function buildFacetArray($facet, $facetList, $urlHelper = false)
{
$result = parent::buildFacetArray($facet, $facetList, $urlHelper);
if ($urlHelper !== false) {
// Recreate href's for any facet items that have children/ancestors
// applied to remove them from the filters
$result = $this->removeAncestorAndChildFilters($facet, $result);
}
return $result;
}
/**
* Tests for flattenFacetHierarchy
*/
public function testFlattenFacetHierarchy()
{
$facetList = $this->helper->flattenFacetHierarchy($this->helper->buildFacetArray('format', $this->facetList));
$this->assertEquals($facetList[0]['value'], '0/Book/');
$this->assertEquals($facetList[1]['value'], '1/Book/BookPart/');
$this->assertEquals($facetList[2]['value'], '1/Book/Section/');
$this->assertEquals($facetList[3]['value'], '0/AV/');
$this->assertEquals($facetList[4]['value'], '0/Audio/');
$this->assertEquals($facetList[5]['value'], '1/Audio/Spoken/');
$this->assertEquals($facetList[6]['value'], '1/Audio/Music/');
}
/**
* Get facet information from the search results.
*
* @return array
* @throws \Exception
*/
public function getFacetSet()
{
$facetSet = $this->results->getFacetList($this->mainFacets);
foreach ($this->hierarchicalFacets as $hierarchicalFacet) {
if (isset($facetSet[$hierarchicalFacet])) {
if (!$this->hierarchicalFacetHelper) {
throw new \Exception(get_class($this) . ': hierarchical facet helper unavailable');
}
$facetArray = $this->hierarchicalFacetHelper->buildFacetArray($hierarchicalFacet, $facetSet[$hierarchicalFacet]['list']);
$facetSet[$hierarchicalFacet]['list'] = $this->hierarchicalFacetHelper->flattenFacetHierarchy($facetArray);
}
}
return $facetSet;
}
