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Current File : //home/rtorresani/www/vendor/magento/module-catalog/Block/Adminhtml/Product/Edit/Tab/Alerts.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

/**
 * Product alerts tab
 *
 * @author      Magento Core Team <core@magentocommerce.com>
 */
namespace Magento\Catalog\Block\Adminhtml\Product\Edit\Tab;

class Alerts extends \Magento\Backend\Block\Widget\Tab
{
    /**
     * @var string
     */
    protected $_template = 'Magento_Catalog::catalog/product/tab/alert.phtml';

    /**
     * @return $this
     */
    protected function _prepareLayout()
    {
        $accordion = $this->getLayout()->createBlock(
            \Magento\Backend\Block\Widget\Accordion::class
        )->setId('productAlerts');
        /* @var $accordion \Magento\Backend\Block\Widget\Accordion */

        $alertPriceAllow = $this->_scopeConfig->getValue(
            'catalog/productalert/allow_price',
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        );
        $alertStockAllow = $this->_scopeConfig->getValue(
            'catalog/productalert/allow_stock',
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        );

        if ($alertPriceAllow) {
            $accordion->addItem(
                'price',
                [
                    'title' => __('Price Alert Subscriptions'),
                    'content' => $this->getLayout()->createBlock(
                        \Magento\Catalog\Block\Adminhtml\Product\Edit\Tab\Alerts\Price::class
                    )->toHtml() . '<br />',
                    'open' => true
                ]
            );
        }
        if ($alertStockAllow) {
            $accordion->addItem(
                'stock',
                [
                    'title' => __('Stock Alert Subscriptions'),
                    'content' => $this->getLayout()->createBlock(
                        \Magento\Catalog\Block\Adminhtml\Product\Edit\Tab\Alerts\Stock::class
                    ),
                    'open' => true
                ]
            );
        }

        $this->setChild('accordion', $accordion);

        return parent::_prepareLayout();
    }

    /**
     * @return string
     */
    public function getAccordionHtml()
    {
        return $this->getChildHtml('accordion');
    }

    /**
     * Tab is hidden
     *
     * @return bool
     */
    public function canShowTab()
    {
        $alertPriceAllow = $this->_scopeConfig->getValue(
            'catalog/productalert/allow_price',
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        );
        $alertStockAllow = $this->_scopeConfig->getValue(
            'catalog/productalert/allow_stock',
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        );
        return ($alertPriceAllow || $alertStockAllow) && parent::canShowTab();
    }
}