The QueryStringCreated event dispatcher does not work

Problem/Motivation

The QueryString URL processor provides an event "facets.query_string_created" to change the URL of each facet filter with an EventSubscriber. However, the changes are not picked up in QueryString::buildUrls() method, so no changes are possible.

Proposed resolution

In \Drupal\facets\Plugin\facets\url_processor\QueryString :

Replace :

$this->eventDispatcher->dispatch(QueryStringCreated::NAME, new QueryStringCreated($result_get_params, $filter_params, $result, $this->activeFilters, $facet));

By :

$event = new QueryStringCreated($result_get_params, $filter_params, $result, $this->activeFilters, $facet);
$this->eventDispatcher->dispatch(QueryStringCreated::NAME, $event);
$filter_params = $event->getFilterParameters();

Remaining tasks

None

User interface changes

None

API changes

None

Data model changes

None