<?php
namespace Elastica\Aggregation;

use Elastica\Filter\AbstractFilter;

/**
 * Class Filter.
 *
 * @link http://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-filter-aggregation.html
 */
class Filter extends AbstractAggregation
{
    /**
     * @param string         $name
     * @param AbstractFilter $filter
     */
    public function __construct($name, AbstractFilter $filter = null)
    {
        parent::__construct($name);

        if ($filter !== null) {
            $this->setFilter($filter);
        }
    }

    /**
     * Set the filter for this aggregation.
     *
     * @param AbstractFilter $filter
     *
     * @return $this
     */
    public function setFilter(AbstractFilter $filter)
    {
        return $this->setParam('filter', $filter->toArray());
    }

    /**
     * @return array
     */
    public function toArray()
    {
        $array = array(
            'filter' => $this->getParam('filter'),
        );

        if ($this->_aggs) {
            $array['aggs'] = $this->_aggs;
        }

        return $array;
    }
}