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<?php
namespace SMW\Elastic\QueryEngine;
/**
* @license GNU GPL v2+
* @since 3.0
*
* @author mwjames
*/
class Aggregations {
/**
* @var array
*/
private $parameters = [];
/**
* @var array
*/
private $subAggregations = [];
/**
* @var boolean
*/
private $plain = false;
/**
* @since 3.0
*
* @param Aggregations|array $parameters
*/
public function __construct( $parameters = [] ) {
$this->parameters = $parameters;
}
/**
* @since 3.0
*
* @param Aggregations $aggregations
*/
public function addSubAggregations( Aggregations $aggregations ) {
$this->subAggregations[] = $aggregations;
}
/**
* @since 3.0
*/
public function plain() {
$this->plain = true;
}
/**
* @since 3.0
*
* @return array
*/
public function toArray() {
$params = $this->params( $this->parameters );
foreach ( $this->subAggregations as $subAggregation ) {
foreach ( $params as $key => $value) {
$params[$key] += $subAggregation->toArray();
}
}
if ( $params === [] || $this->plain ) {
return $params;
}
return [ 'aggregations' => $params ];
}
private function params( &$params ) {
$aggregation = $params;
if ( $aggregation instanceof Aggregations ) {
$aggregation->plain();
$params = $aggregation->toArray();
}
if ( !is_array( $params ) ) {
return $params;
}
$p = [];
foreach ( $params as $k => $aggregation ) {
if ( $aggregation instanceof Aggregations ) {
$aggregation = $this->params( $aggregation );
}
if ( is_string( $k ) ) {
$p[$k] = $aggregation;
} else {
$p = array_merge( $p, $aggregation );
}
}
return $p;
}
/**
* @since 3.0
*
* @return string
*/
public function __toString() {
return json_encode( $this->toArray() );
}
}
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