public function unserialize($facetsAsString)
{
$urlFragmentSerializer = new URLFragmentSerializer();
$facetsAsArray = $urlFragmentSerializer->unserialize($facetsAsString);
$facets = [];
foreach ($facetsAsArray as $label => $filters) {
$facet = new Facet();
$facet->setLabel($label);
foreach ($filters as $filterLabel) {
$filter = new Filter();
$filter->setLabel($filterLabel)->setActive(true);
$facet->addFilter($filter);
}
$facets[] = $facet;
}
return $facets;
}
public function setFiltersFromEncodedFacets(array $facets, $encodedFacets)
{
$urlSerializer = new URLFragmentSerializer();
$facetAndFiltersLabels = $urlSerializer->unserialize($encodedFacets);
foreach ($facetAndFiltersLabels as $facetLabel => $filters) {
foreach ($facets as $facet) {
if ($facet->getLabel() === $facetLabel) {
if (true === $facet->getProperty('range')) {
$symbol = $filters[0];
$from = $filters[1];
$to = $filters[2];
$found = false;
foreach ($facet->getFilters() as $filter) {
if ($from >= $filter->getValue()['from'] && $to <= $filter->getValue()['to']) {
$filter->setActive(true);
$found = true;
}
}
if (!$found) {
$filter = new Filter();
$filter->setValue(['from' => $from, 'to' => $to])->setProperty('symbol', $symbol);
$filter->setActive(true);
$facet->addFilter($filter);
}
} else {
foreach ($filters as $filterLabel) {
foreach ($facet->getFilters() as $filter) {
if ($filter->getLabel() === $filterLabel) {
$filter->setActive(true);
}
}
}
}
}
}
}
return $facets;
}
/**
* This method generates a URL stub for each filter inside the given facets
* and assigns this stub to the filters.
* The URL stub is called 'nextEncodedFacets' because it is used
* to generate the URL of the search once a filter is activated.
*/
private function addEncodedFacetsToFilters(array $facets)
{
// first get the currently active facetFilter in an array
$activeFacetFilters = $this->facetsSerializer->getActiveFacetFiltersFromFacets($facets);
$urlSerializer = new URLFragmentSerializer();
foreach ($facets as $facet) {
// If only one filter can be selected, we keep track of
// the current active filter to disable it before generating the url stub
// and not select two filters in a facet that can have only one active filter.
if (!$facet->isMultipleSelectionAllowed()) {
foreach ($facet->getFilters() as $filter) {
if ($filter->isActive()) {
// we have a currently active filter is the facet, remove it from the facetFilter array
$activeFacetFilters = $this->facetsSerializer->removeFilterFromFacetFilters($activeFacetFilters, $filter, $facet);
break;
}
}
}
foreach ($facet->getFilters() as $filter) {
$facetFilters = $activeFacetFilters;
// toggle the current filter
if ($filter->isActive()) {
$facetFilters = $this->facetsSerializer->removeFilterFromFacetFilters($facetFilters, $filter, $facet);
} else {
$facetFilters = $this->facetsSerializer->addFilterToFacetFilters($facetFilters, $filter, $facet);
}
// We've toggled the filter, so the call to serialize
// returns the "URL" for the search when user has toggled
// the filter.
$filter->setNextEncodedFacets($urlSerializer->serialize($facetFilters));
}
}
}
