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<?php
/**
 * Copyright © Magefan ([email protected]). All rights reserved.
 * Please visit Magefan.com for license details (https://magefan.com/end-user-license-agreement).
 *
 * Glory to Ukraine! Glory to the heroes!
 */
namespace Magefan\Blog\Model;

use Magento\Framework\UrlInterface;
use Magento\Framework\App\ActionFlag;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Store\Model\ScopeInterface;

/**
 * Class NoSlashUrlRedirect Model
 */
class NoSlashUrlRedirect
{
    /**
     * @var ScopeConfigInterface
     */
    protected $scopeConfig;

    /**
     * @var UrlInterface
     */
    protected $urlInterface;

    /**
     * @var \Magento\Framework\App\ActionFlag
     */
    protected $actionFlag;

    /**
     * NoSlashUrlRedirect constructor.
     * @param UrlInterface $urlInterface
     * @param ActionFlag $actionFlag
     * @param ScopeConfigInterface $scopeConfig
     */
    public function __construct(
        UrlInterface $urlInterface,
        ActionFlag $actionFlag,
        ScopeConfigInterface $scopeConfig
    ) {
        $this->scopeConfig = $scopeConfig;
        $this->actionFlag = $actionFlag;
        $this->urlInterface = $urlInterface;
    }

    /**
     * @param \Magento\Framework\Event\Observer $observer
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     */
    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $moduleEnabled = $this->scopeConfig->getValue(Config::XML_PATH_EXTENSION_ENABLED, ScopeInterface::SCOPE_STORE);

        if ($moduleEnabled) {
            $currentUrl = $this->urlInterface->getCurrentUrl();
            $result = explode('?', $currentUrl);
            $result[0] = trim($result[0], '/');
            $urlNoSlash = implode('?', $result);

            if ($urlNoSlash != $currentUrl) {
                $controller = $observer->getEvent()->getData('controller_action');
                if ($controller->getRequest()->isXmlHttpRequest()
                    || $controller->getRequest()->isPost()
                ) {
                    return;
                }
                $this->actionFlag->set('', \Magento\Framework\App\ActionInterface::FLAG_NO_DISPATCH, true);
                $controller->getResponse()->setRedirect($urlNoSlash, 301)->sendResponse();
            }
        }
    }
}