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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\Helper;

use Magento\Framework\Data\Tree\Node;
use Magento\Store\Model\ScopeInterface;

/**
 * Magefan Blog Menu Helper
 * Example: {{block class="Magefan\Blog\Block\Smartwave\Megamenu\Topmenu" menu_type="fullwidth" }}
 */
class Menu extends \Magento\Framework\App\Helper\AbstractHelper
{
    /**
     * @var \Magefan\Blog\Model\Url
     */
    protected $url;

    /**
     * @param \Magento\Framework\Registry $registry,
     */
    protected $registry;

    /**
     * @var \Magefan\Blog\Model\ResourceModel\Category\CollectionFactory
     */
    protected $categoryCollectionFactory;

    /**
     * @var \Magento\Store\Model\StoreManagerInterface
     */
    protected $storeManager;

    /**
     * @param \Magento\Framework\App\Helper\Context                        $context
     * @param \Magefan\Blog\Model\Url                                      $url
     * @param \Magento\Framework\Registry                                  $registry
     * @param \Magefan\Blog\Model\ResourceModel\Category\CollectionFactory $categoryCollectionFactory
     * @param \Magento\Store\Model\StoreManagerInterface                   $storeManager
     */
    public function __construct(
        \Magento\Framework\App\Helper\Context $context,
        \Magefan\Blog\Model\Url $url,
        \Magento\Framework\Registry $registry,
        \Magefan\Blog\Model\ResourceModel\Category\CollectionFactory $categoryCollectionFactory,
        \Magento\Store\Model\StoreManagerInterface $storeManager
    ) {
        $this->url = $url;
        $this->registry = $registry;
        $this->categoryCollectionFactory = $categoryCollectionFactory;
        $this->storeManager = $storeManager;
        parent::__construct($context);
    }

    /**
     * Retrieve blog menu nodes
     * @param  mixed $menu
     * @param  mixed $tree
     * @return \Magento\Framework\Data\Tree\Node | null
     */
    public function getBlogNode($menu = null, $tree = null)
    {
        if (!$this->scopeConfig->isSetFlag(Config::XML_PATH_TOP_MENU_SHOW_ITEM, ScopeInterface::SCOPE_STORE)) {
            return;
        }

        if (!$this->scopeConfig->isSetFlag(Config::XML_PATH_EXTENSION_ENABLED, ScopeInterface::SCOPE_STORE)) {
            return;
        }

        if (null == $tree) {
            $tree = new \Magento\Framework\Data\Tree;
        }

        $addedNodes = [];

        $data = [
            'name'      => $this->scopeConfig->getValue(
                Config::XML_PATH_TOP_MENU_ITEM_TEXT,
                ScopeInterface::SCOPE_STORE
            ),
            'id'        => 'magefan-blog',
            'url'       => $this->url->getBaseUrl(),
            'is_active' => ($this->_request->getModuleName() == 'blog')
        ];

        $addedNodes[0] = new Node($data, 'id', $tree, $menu);

        $includeCategories = $this->scopeConfig->getValue(
            Config::XML_PATH_TOP_MENU_INCLUDE_CATEGORIES,
            ScopeInterface::SCOPE_STORE
        );

        if ($includeCategories) {
            $maxDepth = $this->scopeConfig->getValue(
                Config::XML_PATH_TOP_MENU_MAX_DEPTH,
                ScopeInterface::SCOPE_STORE
            );

            $items = $this->getGroupedChilds();
            $currentCategoryId = $this->getCurrentCategory()
                ? $this->getCurrentCategory()->getId()
                : 0;

            foreach ($items as $item) {
                $parentId = (int) $item->getParentId();

                if (!isset($addedNodes[$parentId])) {
                    continue;
                }

                if ($maxDepth > 0 && $item->getLevel() >= $maxDepth) {
                    continue;
                }

                $data = [
                    'name'      => $item->getTitle(),
                    'id'        => 'magefan-blog-category-' . $item->getId(),
                    'url'       => $item->getCategoryUrl(),
                    'is_active' => $currentCategoryId == $item->getId()
                ];

                $addedNodes[$item->getId()] = new Node($data, 'id', $tree, $menu);
                $addedNodes[$parentId]->addChild(
                    $addedNodes[$item->getId()]
                );
            }
        }

        return $addedNodes[0];
    }

    /**
     * Retrieve sorted array of categories
     * @return array
     */
    protected function getGroupedChilds()
    {
        return $this->categoryCollectionFactory->create()
            ->addActiveFilter()
            ->addStoreFilter($this->storeManager->getStore()->getId())
            ->addFieldToFilter('include_in_menu', 1)
            ->setOrder('position')
            ->getTreeOrderedArray();
    }

    /**
     * Retrieve current blog category
     * @return \Magefan\Blog\Model\Category | null
     */
    protected function getCurrentCategory()
    {
        return $this->registry->registry('current_blog_category');
    }
}