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<?php

/* --------------------------------------------------------------
   ProductAttributeRepositoryReader.inc.php 2016-01-08
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Class ProductAttributeRepositoryReader
 *
 * @category   System
 * @package    ProductModule
 * @subpackage Reader
 */
class ProductAttributeRepositoryReader implements ProductAttributeRepositoryReaderInterface
{
    /**
     * @var CI_DB_query_builder
     */
    private $db;

    /**
     * @var ProductAttributeFactoryInterface
     */
    private $factory;


    /**
     * Initialize the product attribute repository reader.
     *
     * @param CI_DB_query_builder              $db
     * @param ProductAttributeFactoryInterface $factory
     */
    public function __construct(CI_DB_query_builder $db, ProductAttributeFactoryInterface $factory)
    {
        $this->db      = $db;
        $this->factory = $factory;
    }


    /**
     * Returns a product attribute entity by the given product attribute id.
     *
     * @param IdType $productAttributeId Id of expected product attribute entity.
     *
     * @throws UnexpectedValueException If the requested product attribute was not found.
     * @throws InvalidArgumentException If the provided attribute ID is not valid.
     *
     * @return StoredProductAttributeInterface Expected product attribute entity.
     */
    public function getAttributeById(IdType $productAttributeId)
    {
        $dataArray = $this->db->get_where('products_attributes',
                                          array('products_attributes_id' => $productAttributeId->asInt()))->row_array();

        if(null === $dataArray)
        {
            throw new UnexpectedValueException('The requested product attribute was not found in database (ID:'
                                               . $productAttributeId->asInt()
                                               . ')');
        }

        $storedProductAttribute = $this->factory->createStoredProductAttribute($productAttributeId);
        $this->_callStoredProductAttributeSetter($storedProductAttribute, $dataArray);

        return $storedProductAttribute;
    }


    /**
     * Returns a collection with all product attribute entities which belongs to the product entity by the given
     * product id.
     *
     * @param IdType $productId Id of product entity which belongs to the expected product attribute entities.
     *
     * @throws UnexpectedValueException If the requested attributes were not found.
     * @throws InvalidArgumentException If the provided product ID ist not valid.
     *
     * @return StoredProductAttributeCollection Collection which contains all expected product attribute entities.
     */
    public function getAttributesByProductId(IdType $productId)
    {
        $dataArray =
            $this->db->get_where('products_attributes', array('products_id' => $productId->asInt()))->result_array();

        if(count($dataArray) === 0)
        {
            throw new UnexpectedValueException('The requested product attribute was not found in database (ID:'
                                               . $productId->asInt()
                                               . ')');
        }

        $storedProductAttributesArray = array();

        foreach($dataArray as $data)
        {
            $storedProductAttribute = $this->factory->createStoredProductAttribute(new IdType($data['products_id']));
            $this->_callStoredProductAttributeSetter($storedProductAttribute, $data);

            $storedProductAttributesArray[] = $storedProductAttribute;
        }

        return MainFactory::create('StoredProductAttributeCollection', $storedProductAttributesArray);
    }


    /**
     * Call the setter of the stored product attribute entity.
     *
     * @param StoredProductAttributeInterface $storedProductAttribute
     * @param array                            $data
     *
     * @throws InvalidArgumentException IF the provided product attribute is not valid.
     *
     * @return ProductAttributeRepositoryReader|$this Same instance for chained method calls.
     */
    protected function _callStoredProductAttributeSetter(StoredProductAttributeInterface $storedProductAttribute, $data)
    {
        $storedProductAttribute->setOptionId(new IdType($data['options_id']));
        $storedProductAttribute->setOptionValueId(new IdType($data['options_values_id']));
        $storedProductAttribute->setPrice(new DecimalType($data['options_values_price']));
        $storedProductAttribute->setPriceType(new StringType((string)$data['price_prefix']));
        $storedProductAttribute->setAttributeModel(new StringType((string)$data['attributes_model']));
        $storedProductAttribute->setStock(new DecimalType((float)$data['attributes_stock']));
        $storedProductAttribute->setWeight(new DecimalType($data['options_values_weight']));
        $storedProductAttribute->setWeightType(new StringType((string)$data['weight_prefix']));
        $storedProductAttribute->setSortOrder(new IntType((int)$data['sortorder']));
        $storedProductAttribute->setVpeId(new IdType($data['products_vpe_id']));
        $storedProductAttribute->setVpeValue(new DecimalType($data['gm_vpe_value']));
        $storedProductAttribute->setAttributeEan(new StringType((string)$data['gm_ean']));

        return $this;
    }
}