Event Listener

Creating an Event Listener

You can attach event listeners to any of the events dispatched during the ONGRFilterManager search. The name of each of the events is defined as a constant on the ONGRFilterManagerEvents class. Each event has their own event object:

Name	Constant	Argument passed to the listener
`ongr_filter_manager.pre_search`	PRE_SEARCH	PreSearchEvent
`ongr_filter_manager.search_response`	SEARCH_RESPONSE	SearchResponseEvent
`ongr_filter_manager.pre_process_search`	PRE_PROCESS_SEARCH	PreProcessSearchEvent

The Listener Class

For example, SearchResponseEvent listener might look like this:

<?php

namespace AppBundle\EventListener;

use ONGR\FilterManagerBundle\Event\SearchResponseEvent;
// ...
class SearchResponseListener
{
    // ...
    public function onSearchResponse(SearchResponseEvent $event)
    {
        $results = $event->getDocumentIterator();
        // Do your magic
    }
    // ...
}

Listener Configuration

To register an event listener you just have to tag it with the appropriate name. For example, SearchResponseEventListener configuration might look like this:

services:
    # ...
    app_bundle.search_response_listener:
        class: AppBundle\EventListener\SearchResponseEventListener
        tags:
            - { name: kernel.event_listener, event: ongr_filter_manager.search_response, method: onSearchResponse }