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<?php
/**
 * @license http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 * @author Hervé Guétin <[email protected]> <@herveguetin>
 * @copyright Copyright (c) 2017 Agence Soon (http://www.agence-soon.fr)
 */

namespace Soon\AjaxScroll\Block;

use Magento\Framework\Exception\LocalizedException;
use Magento\Framework\Serialize\Serializer\Json as JsonSerializer;
use Magento\Framework\View\Element\Template;
use Magento\Framework\View\Element\Template\Context;
use Magento\Store\Model\ScopeInterface;
use Magento\Theme\Block\Html\Pager;

class JsConfig extends Template
{
    const IS_INFINITE_CONFIG_PATH = 'catalog/soon_ajaxscroll/is_infinite';
    const REPEAT_CONTAINER_CONFIG_PATH = 'catalog/soon_ajaxscroll/repeat_container';

    /**
     * @var Context
     */
    private $context;
    /**
     * @var JsonSerializer
     */
    private $jsonSerializer;

    /**
     * JsConfig constructor.
     * @param Context $context
     * @param JsonSerializer $jsonSerializer
     * @param array $data
     */
    public function __construct(
        Context $context,
        JsonSerializer $jsonSerializer,
        array $data = []
    ) {
        parent::__construct($context, $data);
        $this->context = $context;
        $this->jsonSerializer = $jsonSerializer;
    }

    /**
     * @return string
     * @throws LocalizedException
     */
    public function jsConfig()
    {
        return $this->jsonSerializer->serialize(
            $this->jsonConfig()
        );
    }

    /**
     * @return Pager
     * @throws LocalizedException
     */
    private function pager()
    {
        /** @var Pager $pager */
        $pager = $this->getLayout()->getBlock('product_list_toolbar_pager');

        return $pager;
    }

    /**
     * @return array
     * @throws LocalizedException
     */
    private function jsonConfig()
    {
        $jsonConfig = [];
        $pager = $this->pager();
        if ($pager && $pager->getCollection()) {
            $jsonConfig = [
                'current_page' => $this->pager()->getCurrentPage(),
                'last_page' => $this->pager()->getLastPageNum(),
                'items_per_page' => $this->pager()->getLimit(),
                'collection_count' => $this->pager()->getTotalNum(),
                'is_infinite' => (bool)$this->context->getScopeConfig()->getValue(self::IS_INFINITE_CONFIG_PATH,
                    ScopeInterface::SCOPE_STORE),
                'repeat_container' => (bool)$this->context->getScopeConfig()->getValue(self::REPEAT_CONTAINER_CONFIG_PATH,
                    ScopeInterface::SCOPE_STORE)
            ];
        }

        return $jsonConfig;
    }
}