Isswp101\Persimmon\Traits\Paginationable::makePagination PHP Метод

    public function makePagination(QueryBuilder $query = null)
    {
        if (is_null($this->_position)) {
            throw new Exception('To use Paginationable trait you must fill _position property in your model');
        }
        /** @var ElasticsearchModel $model */
        $model = static::createInstance();
        $query = $query ?: new QueryBuilder();
        $prevDoc = null;
        $nextDoc = null;
        $query->fields();
        $prevPos = $this->_position - 1;
        if ($prevPos >= 0) {
            $items = $model->search($query->from($prevPos)->size(3));
            $prevDoc = $items->first();
            $items = array_values($items->toArray());
            if (array_key_exists(2, $items)) {
                $nextDoc = $items[2];
            }
        } else {
            $items = $model->search($query->from($this->_position)->size(2));
            $total = $items->getTotal();
            $nextDoc = $items->last();
            $last = $total - 1;
            $items = $model->search($query->from($last)->size(1));
            $prevDoc = $items->first();
        }
        if (!$nextDoc) {
            $items = $model->search($query->from(0)->size(1));
            $nextDoc = $items->first();
        }
        $this->_previous = $prevDoc;
        $this->_next = $nextDoc;
    }