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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Catalog\Block\Product;

use Magento\Customer\Model\Context as CustomerContext;

/**
 * New products block
 *
 * @SuppressWarnings(PHPMD.LongVariable)
 */
class NewProduct extends \Magento\Catalog\Block\Product\AbstractProduct implements
    \Magento\Framework\DataObject\IdentityInterface
{
    /**
     * Default value for products count that will be shown
     */
    const DEFAULT_PRODUCTS_COUNT = 10;

    /**
     * Products count
     *
     * @var int
     */
    protected $_productsCount;

    /**
     * @var \Magento\Framework\App\Http\Context
     */
    protected $httpContext;

    /**
     * Catalog product visibility
     *
     * @var \Magento\Catalog\Model\Product\Visibility
     */
    protected $_catalogProductVisibility;

    /**
     * Product collection factory
     *
     * @var \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory
     */
    protected $_productCollectionFactory;

    /**
     * @param Context $context
     * @param \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory
     * @param \Magento\Catalog\Model\Product\Visibility $catalogProductVisibility
     * @param \Magento\Framework\App\Http\Context $httpContext
     * @param array $data
     */
    public function __construct(
        \Magento\Catalog\Block\Product\Context $context,
        \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
        \Magento\Catalog\Model\Product\Visibility $catalogProductVisibility,
        \Magento\Framework\App\Http\Context $httpContext,
        array $data = []
    ) {
        $this->_productCollectionFactory = $productCollectionFactory;
        $this->_catalogProductVisibility = $catalogProductVisibility;
        $this->httpContext = $httpContext;
        parent::__construct(
            $context,
            $data
        );
    }

    /**
     * Initialize block's cache
     *
     * @return void
     */
    protected function _construct()
    {
        parent::_construct();
        $this->addColumnCountLayoutDepend('empty', 6)
            ->addColumnCountLayoutDepend('1column', 5)
            ->addColumnCountLayoutDepend('2columns-left', 4)
            ->addColumnCountLayoutDepend('2columns-right', 4)
            ->addColumnCountLayoutDepend('3columns', 3);

        $this->addData(
            ['cache_lifetime' => 86400, 'cache_tags' => [\Magento\Catalog\Model\Product::CACHE_TAG]]
        );
    }

    /**
     * Get Key pieces for caching block content
     *
     * @return array
     */
    public function getCacheKeyInfo()
    {
        return [
           'CATALOG_PRODUCT_NEW',
           $this->_storeManager->getStore()->getId(),
           $this->_design->getDesignTheme()->getId(),
           $this->httpContext->getValue(CustomerContext::CONTEXT_GROUP),
           'template' => $this->getTemplate(),
           $this->getProductsCount()
        ];
    }

    /**
     * Prepare and return product collection
     *
     * @return \Magento\Catalog\Model\ResourceModel\Product\Collection|Object|\Magento\Framework\Data\Collection
     */
    protected function _getProductCollection()
    {
        $todayStartOfDayDate = $this->_localeDate->date()->setTime(0, 0, 0)->format('Y-m-d H:i:s');
        $todayEndOfDayDate = $this->_localeDate->date()->setTime(23, 59, 59)->format('Y-m-d H:i:s');

        /** @var $collection \Magento\Catalog\Model\ResourceModel\Product\Collection */
        $collection = $this->_productCollectionFactory->create();
        $collection->setVisibility($this->_catalogProductVisibility->getVisibleInCatalogIds());

        $collection = $this->_addProductAttributesAndPrices(
            $collection
        )->addStoreFilter()->addAttributeToFilter(
            'news_from_date',
            [
                'or' => [
                    0 => ['date' => true, 'to' => $todayEndOfDayDate],
                    1 => ['is' => new \Zend_Db_Expr('null')],
                ]
            ],
            'left'
        )->addAttributeToFilter(
            'news_to_date',
            [
                'or' => [
                    0 => ['date' => true, 'from' => $todayStartOfDayDate],
                    1 => ['is' => new \Zend_Db_Expr('null')],
                ]
            ],
            'left'
        )->addAttributeToFilter(
            [
                ['attribute' => 'news_from_date', 'is' => new \Zend_Db_Expr('not null')],
                ['attribute' => 'news_to_date', 'is' => new \Zend_Db_Expr('not null')],
            ]
        )->addAttributeToSort(
            'news_from_date',
            'desc'
        )->setPageSize(
            $this->getProductsCount()
        )->setCurPage(
            1
        );

        return $collection;
    }

    /**
     * Prepare collection with new products
     *
     * @return \Magento\Framework\View\Element\AbstractBlock
     */
    protected function _beforeToHtml()
    {
        $this->setProductCollection($this->_getProductCollection());
        return parent::_beforeToHtml();
    }

    /**
     * Set how much product should be displayed at once.
     *
     * @param int $count
     * @return $this
     */
    public function setProductsCount($count)
    {
        $this->_productsCount = $count;
        return $this;
    }

    /**
     * Get how much products should be displayed at once.
     *
     * @return int
     */
    public function getProductsCount()
    {
        if (null === $this->_productsCount) {
            $this->_productsCount = self::DEFAULT_PRODUCTS_COUNT;
        }
        return $this->_productsCount;
    }

    /**
     * Return identifiers for produced content
     *
     * @return array
     */
    public function getIdentities()
    {
        return [\Magento\Catalog\Model\Product::CACHE_TAG];
    }
}