<?php

namespace IpSupply\News\Block\Widget;

use Magento\Framework\View\Element\Template;
use Magento\Widget\Block\BlockInterface;
use Magento\Framework\View\Element\Template\Context;
use Magento\Framework\App\ObjectManager;
use Magento\Store\Model\StoreManagerInterface;
use Magento\Framework\UrlInterface;
use DOMDocument;
use DOMXPath;

class NewsWidget extends Template implements BlockInterface {
	protected $_objectManager;
	protected $_storeManager;

	public function __construct(StoreManagerInterface $_storeManager, Context $context, array $data = []) {
		$this->_objectManager = ObjectManager::getInstance();
		$this->_storeManager = $_storeManager;
		parent::__construct($context, $data);
	}

	public function getRSSData() {
		$rssUrl = $this->getData("url");
		$xml = simplexml_load_file($rssUrl); // data type of $xml is Object
		$dataResponse = array();
		foreach ($xml->channel->item as $item) {
			$description = strip_tags($item->description, ['a']);

			$doc = new DOMDocument();
			libxml_use_internal_errors(true);
			$doc->loadHTML($item->description);
			$xpath = new DOMXPath($doc);
			$imgs = $xpath->query("//img");
			if (count($imgs) != 0) {
				$imageURL = $imgs[0]->getAttribute("src");
			}
			else {
				$imageURL = null;
			}

			$obj = array(
				"image_url" => $imageURL,
				"title" => $item->title,
				"link" => $item->link,
				"description" => $description,
			);
			array_push($dataResponse, $obj);
		}
		return $dataResponse;
	}

	function getAssetUrl($asset) {
	    $assetRepository = $this->_objectManager->get('Magento\Framework\View\Asset\Repository');
	    return $assetRepository->createAsset($asset)->getUrl();
	}
}