/**
* Adds filters specified through HTTP GET as filter query parameters to
* the Solr query.
*
*/
protected function addFacetQueryFilters()
{
// todo refactor to use a request object
$resultParameters = GeneralUtility::_GET('tx_solr');
// format for filter URL parameter:
// tx_solr[filter]=$facetName0:$facetValue0,$facetName1:$facetValue1,$facetName2:$facetValue2
if (is_array($resultParameters['filter'])) {
$filters = array_map('urldecode', $resultParameters['filter']);
// $filters look like array('name:value1','name:value2','fieldname2:foo')
$configuredFacets = $this->getConfiguredFacets();
// first group the filters by facetName - so that we can
// decide later whether we need to do AND or OR for multiple
// filters for a certain facet/field
// $filtersByFacetName look like array('name' => array ('value1', 'value2'), 'fieldname2' => array('foo'))
$filtersByFacetName = array();
foreach ($filters as $filter) {
// only split by the first colon to allow using colons in the filter value itself
list($filterFacetName, $filterValue) = explode(':', $filter, 2);
if (in_array($filterFacetName, $configuredFacets)) {
$filtersByFacetName[$filterFacetName][] = $filterValue;
}
}
foreach ($filtersByFacetName as $facetName => $filterValues) {
$facetConfiguration = $this->allConfiguredFacets[$facetName . '.'];
$filterEncoder = $this->facetRendererFactory->getFacetFilterEncoderByFacetName($facetName);
$tag = '';
if ($facetConfiguration['keepAllOptionsOnSelection'] == 1 || $this->configuration->getSearchFacetingKeepAllFacetsOnSelection()) {
$tag = '{!tag=' . addslashes($facetConfiguration['field']) . '}';
}
$filterParts = array();
foreach ($filterValues as $filterValue) {
if (!is_null($filterEncoder)) {
$filterOptions = $facetConfiguration[$facetConfiguration['type'] . '.'];
if (empty($filterOptions)) {
$filterOptions = array();
}
$filterValue = $filterEncoder->decodeFilter($filterValue, $filterOptions);
$filterParts[] = $facetConfiguration['field'] . ':' . $filterValue;
} else {
$filterParts[] = $facetConfiguration['field'] . ':"' . addslashes($filterValue) . '"';
}
}
$operator = $facetConfiguration['operator'] == 'OR' ? ' OR ' : ' AND ';
$this->facetFilters[] = $tag . '(' . implode($operator, $filterParts) . ')';
}
}
}
