<?php

namespace Letsknowit\Priceslider\Block;

use Magento\Catalog\Model\Layer\Filter\Price;
use Magento\Catalog\Model\Layer\Filter\FilterInterface;
use Magento\Framework\View\Element\Template;
use Magento\LayeredNavigation\Block\Navigation\FilterRendererInterface;

class FilterRenderer extends \Magento\LayeredNavigation\Block\Navigation\FilterRenderer {
    
    protected $registry;

    protected $request;

    protected $productCollection;

    protected $scopeConfig;

    public function __construct(
        \Magento\Framework\Registry $registry,
        \Magento\Framework\App\RequestInterface $request,
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
        \Magento\Catalog\Model\ResourceModel\Product\Collection $productCollection,
         \Magento\Backend\Block\Template\Context $context,        
        array $data = [ ]
    ) {
       $this->registry = $registry; 
       $this->request = $request;
       $this->scopeConfig = $scopeConfig;
       $this->productCollection = $productCollection;       
       parent::__construct($context, $data);

    }

    public function getPriceRange($filter) {
          
       $category = $this->registry->registry('current_category');

       $ProductFactory = $this->productCollection->addAttributeToSelect('price')->setOrder('price', 'DESC')->addCategoryFilter($category); 

        $maxPrice = $ProductFactory->getMaxPrice();
        $minPrice = $ProductFactory->getMinPrice();       
        $filterprice = array('min' => $minPrice, 'max' => $maxPrice);
       
        return $filterprice;
    }

?>