Maslosoft Manganel API
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/**
* This software package is licensed under `AGPL, Commercial` license[s].
*
* @package maslosoft/manganel
* @license AGPL, Commercial
*
* @copyright Copyright (c) Peter Maselkowski <pmaselkowski@gmail.com>
* @link https://maslosoft.com/manganel/
*/
namespace Maslosoft\Manganel\Adapters\Finder;
use Maslosoft\Mangan\Interfaces\Adapters\FinderCursorInterface;
use Maslosoft\Manganel\Decorators\IndexDecorator;
use Maslosoft\Manganel\Decorators\MaxScoreDecorator;
use Maslosoft\Manganel\Decorators\ScoreDecorator;
use Maslosoft\Manganel\QueryBuilder;
use Maslosoft\Manganel\SearchCriteria;
/**
* ElasticSearchCursor
*
* @author Piotr Maselkowski <pmaselkowski at gmail.com>
*/
class ElasticSearchCursor implements FinderCursorInterface
{
/**
* Whether query was sent to search server
* @var bool
*/
private $isExecuted = false;
/**
*
* @var QueryBuilder
*/
private $qb = null;
/**
*
* @var array
*/
private $data = [];
public function __construct(QueryBuilder $qb)
{
$this->qb = $qb;
$criteria = $qb->getCriteria();
if (empty($criteria))
{
$this->qb->setCriteria(new SearchCriteria());
}
}
public function limit($num)
{
$this->qb->getCriteria()->limit($num);
return $this;
}
public function skip($num)
{
$this->qb->getCriteria()->offset($num);
return $this;
}
public function sort(array $fields)
{
$this->qb->getCriteria()->setSort($fields);
return $this;
}
public function fields(array $fields)
{
$this->qb->getCriteria()->select($fields);
return $this;
}
// <editor-fold defaultstate="collapsed" desc="Countable impl">
/**
*
* @return int
*/
public function count()
{
$this->execute();
return count($this->data);
}
// </editor-fold>
// <editor-fold defaultstate="collapsed" desc="Iterator impl">
public function current()
{
$this->execute();
return current($this->data);
}
public function key()
{
$this->execute();
return key($this->data);
}
public function next()
{
$this->execute();
next($this->data);
}
public function rewind()
{
$this->execute();
return reset($this->data);
}
public function valid()
{
$this->execute();
$key = key($this->data);
return ($key !== null && $key !== false);
}
private function execute()
{
if (!$this->isExecuted)
{
$this->isExecuted = true;
$results = [];
$data = $this->qb->search(null, $results);
$maxScore = $results['hits']['max_score'];
foreach ($data as $result)
{
$document = $result['_source'];
/**
* TODO Refactor it into plugable interface, with params:
* $document,
* $result,
* $results
*/
$document[IndexDecorator::Key] = $result['_index'];
$document[ScoreDecorator::Key] = $result['_score'];
$document[MaxScoreDecorator::Key] = $maxScore;
$this->data[] = $document;
}
}
}
// </editor-fold>
}
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