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<?php |
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namespace Isswp101\Persimmon\Traits; |
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use Exception; |
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use Isswp101\Persimmon\ElasticsearchModel; |
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use Isswp101\Persimmon\QueryBuilder\QueryBuilder; |
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trait Paginationable |
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{ |
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/** |
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* @var ElasticsearchModel |
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*/ |
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public $_previous = null; |
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/** |
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* @var ElasticsearchModel |
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*/ |
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public $_next = null; |
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/** |
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* Search documents and find previous and next documents. |
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* |
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* @param QueryBuilder $query Query |
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* @throws Exception |
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*/ |
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public function makePagination(QueryBuilder $query = null) |
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{ |
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if (is_null($this->_position)) { |
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throw new Exception('To use Paginationable trait you must fill _position property in your model'); |
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} |
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/** @var ElasticsearchModel $model */ |
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$model = static::createInstance(); |
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$query = $query ?: new QueryBuilder(); |
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$prevDoc = null; |
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$nextDoc = null; |
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$query->fields(); |
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$prevPos = $this->_position - 1; |
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if ($prevPos >= 0) { |
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$items = $model->search($query->from($prevPos)->size(3)); |
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$prevDoc = $items->first(); |
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$items = array_values($items->toArray()); |
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if (array_key_exists(2, $items)) { |
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$nextDoc = $items[2]; |
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} |
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} else { |
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$items = $model->search($query->from($this->_position)->size(2)); |
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$total = $items->getTotal(); |
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$nextDoc = $items->last(); |
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$last = $total - 1; |
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$items = $model->search($query->from($last)->size(1)); |
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$prevDoc = $items->first(); |
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} |
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if (!$nextDoc) { |
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$items = $model->search($query->from(0)->size(1)); |
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$nextDoc = $items->first(); |
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} |
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$this->_previous = $prevDoc; |
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$this->_next = $nextDoc; |
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} |
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/** |
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* Return previous document. |
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* |
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* @return ElasticsearchModel |
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*/ |
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public function getPrevious() |
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{ |
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return $this->_previous; |
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} |
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/** |
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* Return next document. |
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* |
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* @return ElasticsearchModel |
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*/ |
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public function getNext() |
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{ |
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return $this->_next; |
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} |
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} |
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devemio /
elasticsearch-eloquent
