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<?php

/* --------------------------------------------------------------
   ProductReadService.inc.php 2016-04-14
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2016 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Class ProductReadService
 *
 * @category   System
 * @package    Product
 */
class ProductReadService implements ProductReadServiceInterface
{
    /**
     * @var ProductRepositoryInterface
     */
    protected $productRepo;

    /**
     * @var ProductListProviderFactoryInterface
     */
    protected $listProviderFactory;
    
    /**
     * The product category linker.
     *
     * @var ProductCategoryLinkerInterface
     */
    protected $productLinker;
    
    /**
     * The url rewrite storage.
     *
     * @var UrlRewriteStorage
     */
    protected $urlRewriteStorage;
    
    
    /**
     * ProductReadService constructor.
     *
     * @param ProductRepositoryInterface          $productRepo
     * @param ProductListProviderFactoryInterface $listProviderFactory
     * @param ProductCategoryLinkerInterface      $productLinker
     * @param UrlRewriteStorage                   $urlRewriteStorage
     */
    public function __construct(ProductRepositoryInterface $productRepo,
                                ProductListProviderFactoryInterface $listProviderFactory,
                                ProductCategoryLinkerInterface $productLinker,
                                UrlRewriteStorage $urlRewriteStorage)
    {
        $this->productRepo         = $productRepo;
        $this->listProviderFactory = $listProviderFactory;
        $this->productLinker       = $productLinker;
        $this->urlRewriteStorage   = $urlRewriteStorage;
    }


    /**
     * Get Product by ID
     *
     * Returns a specific product, depending on the provided ID.
     *
     * @param IdType $productId The ID of the product to return.
     *
     * @return StoredProductInterface The stored product.
     */
    public function getProductById(IdType $productId)
    {
        return $this->productRepo->getProductById($productId);
    }


    /**
     * Get Product List
     *
     * Returns a specific product list.
     *
     * @param LanguageCode $languageCode        The language code.
     * @param IdType|null  $categoryId          The category ID of the product list.
     * @param IdType|null  $customerStatusLimit The customers status limit.
     *
     * @return ProductListItemCollection
     */
    public function getProductList(LanguageCode $languageCode,
                                   IdType $categoryId = null,
                                   IdType $customerStatusLimit = null)
    {
        $conditions = array();
        
        if($customerStatusLimit !== null)
        {
            $conditions = array('group_permission_' . $customerStatusLimit->asInt() => '1');
        }

        $productListProvider = $this->listProviderFactory->createProductListProvider($languageCode, $conditions);

        if($categoryId !== null)
        {
            $collection = $productListProvider->getByCategoryId($categoryId);
        }
        else
        {
            $collection = $productListProvider->getAll();
        }

        return $collection;
    }
    
    
    /**
     * Returns a paged product list.
     *
     * @param \LanguageCode $languageCode Language of location specific data.
     * @param \IntType|null $page         (Optional) Page of product item list.
     * @param \IntType|null $limit        (Optional) Maximal amount of processed elements.
     *
     * @return \ProductListItemCollection
     */
    public function getPagedList(LanguageCode $languageCode, IntType $page = null, IntType $limit = null)
    {
        $provider = $this->listProviderFactory->createProductListProvider($languageCode);
        
        return $provider->getAllPaged($page, $limit);
    }
    
    
    /**
     * Returns the count of all product entries.
     *
     * @return int
     */
    public function getProductsCount()
    {
        return $this->productRepo->getProductsCount();
    }
    
    
    /**
     * Get Active Product List
     *
     * Returns an active products list.
     *
     * @param LanguageCode $languageCode        The language code.
     * @param IdType|null  $categoryId          The category ID of the product list.
     * @param IdType|null  $customerStatusLimit The customers status limit.
     *
     * @return ProductListItemCollection
     */
    public function getActiveProductList(LanguageCode $languageCode,
                                         IdType $categoryId = null,
                                         IdType $customerStatusLimit = null)
    {
        $conditions = array(
            'products_status' => '1'
        );
        
        if($customerStatusLimit !== null)
        {
            $conditions['group_permission_' . $customerStatusLimit->asInt()] = '1';
        }

        $productListProvider = $this->listProviderFactory->createProductListProvider($languageCode, $conditions);

        if($categoryId !== null)
        {
            $collection = $productListProvider->getByCategoryId($categoryId);
        }
        else
        {
            $collection = $productListProvider->getAll();
        }

        return $collection;
    }
    
    
    /**
     * Returns the category Ids which are linked with given product id.
     *
     * @param IdType $productId
     *
     * @return IdCollection
     */
    public function getProductLinks(IdType $productId)
    {
        return $this->productLinker->getProductLinks($productId);
    }
    
    
    /**
     * Returns an UrlRewriteCollection with UrlRewrite instances for the provided content ID.
     *
     * @param IdType $productId
     *
     * @return UrlRewriteCollection
     */
    public function getRewriteUrls(IdType $productId)
    {
        return $this->urlRewriteStorage->get($productId);
    }
    
    
    /**
     * Returns a single UrlRewrite instance for the provided content ID and language ID or NULL if no entry was found.
     *
     * @param IdType $productId
     * @param IdType $languageId
     *
     * @return null|UrlRewrite
     */
    public function findRewriteUrl(IdType $productId, IdType $languageId)
    {
        return $this->urlRewriteStorage->findByContentIdAndLanguageId($productId, $languageId);
    }
    
    
    /**
     * Returns an UrlRewriteCollection with UrlRewrite instances for the provided rewrite url.
     *
     * @param NonEmptyStringType $rewriteUrl
     *
     * @return UrlRewriteCollection
     */
    public function findUrlRewritesByRewriteUrl(NonEmptyStringType $rewriteUrl)
    {
        return $this->urlRewriteStorage->findByRewriteUrl($rewriteUrl);
    }
}