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<?php |
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namespace pastuhov\ymlcatalog\readers; |
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use pastuhov\ymlcatalog\ReaderInterface; |
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use yii\base\Exception; |
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use yii\base\Model; |
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use yii\data\ActiveDataProvider; |
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/** |
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* Класс выборки данных с помощью DataProvider. |
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* |
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* @package pastuhov\ymlcatalog\readers |
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*/ |
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class DataProviderReader implements ReaderInterface |
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{ |
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/** |
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* @var ActiveDataProvider|null |
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*/ |
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protected $dataProvider = null; |
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/** |
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* @var \yii\data\Pagination|boolean|null |
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*/ |
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protected $pagination = null; |
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/** |
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* @var Model[]|null |
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*/ |
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protected $models = null; |
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/** |
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* @inheritdoc |
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* |
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* @param ActiveDataProvider $dataProvider |
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*/ |
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public function __construct(ActiveDataProvider $dataProvider = null) |
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{ |
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if (is_null($dataProvider)) { |
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throw new Exception('DataProvider can`t be empty.'); |
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} |
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$this->dataProvider = $dataProvider; |
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$this->pagination = $this->dataProvider->getPagination(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function rewind() |
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{ |
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if ($this->pagination && $this->pagination->getPage() != 0) { |
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$this->pagination->setPage(0); |
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$this->dataProvider->prepare(true); |
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} |
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$this->models = $this->dataProvider->getModels(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function next() |
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{ |
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if ($this->pagination) { |
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$this->pagination->setPage($this->pagination->getPage() + 1); |
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$this->dataProvider->prepare(true); |
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$this->models = $this->dataProvider->getModels(); |
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} else { |
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$this->models = null; |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function valid() |
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{ |
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return !empty($this->models); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function current() |
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{ |
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return $this->models; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function key() |
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{ |
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$key = 0; |
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if ($this->pagination) { |
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$key = $this->pagination->getPage(); |
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} |
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return $key; |
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} |
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} |
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pastuhov /
yii2-yml-catalog
