From b4a1fd1d98d4fb17e1ed2e9843d150760e7bb68d Mon Sep 17 00:00:00 2001
From: Alexandr Kozlov <sanekk1988@mail.ru>
Date: Wed, 23 May 2018 22:01:03 +0200
Subject: [PATCH 1/2] add iblock element caching class

---
 IblockElement.php | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 IblockElement.php

diff --git a/IblockElement.php b/IblockElement.php
new file mode 100644
index 0000000..ed28c07
--- /dev/null
+++ b/IblockElement.php
@@ -0,0 +1,83 @@
+<?php
+$_SERVER['DOCUMENT_ROOT'] = '/var/www/workspace/kplus/';
+
+require $_SERVER['DOCUMENT_ROOT'] .'/bitrix/modules/main/include/prolog_before.php';
+
+use \Bitrix\Main;
+
+class CIBlockElementCache
+{
+	/**
+	 * Read data from cache
+	 * 
+	 * @param int $ttl
+	 * @param string $cacheId
+	 * @param string $cacheDir
+	 */
+	public static function readFromCache($ttl, $cacheId)
+	{
+		if ($ttl > 0) {
+			$cache = Main\Application::getInstance()->getManagedCache();
+			
+			if($cache->read($ttl, $cacheId)) {
+				return $cache->get($cacheId);
+			}
+		}
+
+		return null;
+	}
+
+	/**
+	 * Write data to cache
+	 * 
+	 * @param array  $data
+	 * @param int    $ttl
+	 * @param string $cacheId
+	 * @param string $cacheDir
+	 */
+	public static function writeToCache($data, $ttl, $cacheId)
+	{
+		if ($ttl > 0) {
+			$cache = Main\Application::getInstance()->getManagedCache();
+			$ret = $cache->set($cacheId, $data);
+		}
+	}
+
+	public static function GetList()
+	{
+		$args  = func_get_args();
+		$cache = end($args);
+
+		if (isset($cache['ttl'])) {
+			array_pop($args);
+		} else {
+			$cache = ['ttl' => 600, 'fetchMethod' => 'Fetch'];
+		}
+
+		$cacheId = md5(__METHOD__ . serialize($args));
+		$data = static::readFromCache($cache['ttl'], $cacheId);
+
+		if ($data !== null) { echo 'dsf'; die;
+			return $data;
+		}
+
+		$result = call_user_func_array(['\CIBlockElement', __METHOD__], $args);
+		$return = [];
+
+		while($item = call_user_func([$result, $cache['fetchMethod'] ?: 'Fetch'])) {
+			$return[] = $item;
+		}
+
+		static::writeToCache($return, $cache['ttl']);
+
+		return $return;
+	}
+}
+
+
+$items = CIBlockElementCache::GetList(
+	$order  = ['ID' => 'ASC'],
+	$filter = ['IBLOCK_ID' => 1]
+);
+
+print_r($items);
\ No newline at end of file

From 6a6729e68bf0ac7c88afa2d03d280c6d2385a9f6 Mon Sep 17 00:00:00 2001
From: Alexandr Kozlov <sanekk1988@mail.ru>
Date: Wed, 23 May 2018 22:01:19 +0200
Subject: [PATCH 2/2] add rss reader class

---
 getLastNews.php | 140 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 getLastNews.php

diff --git a/getLastNews.php b/getLastNews.php
new file mode 100644
index 0000000..c236850
--- /dev/null
+++ b/getLastNews.php
@@ -0,0 +1,140 @@
+<?php
+
+/**
+ * Reader of rss chanel
+ */
+class RssReader implements \Iterator
+{
+	/**
+	 * @var string
+	 */
+	protected $url;
+
+	/**
+	 * @var XMLReader
+	 */
+	protected $source;
+
+	/**
+	 * @var array
+	 */
+	protected $items = [];
+
+	/**
+	 * @var integer
+	 */
+	protected $position = 0;
+
+	/**
+	 * Construct of class
+	 * 
+	 * @param string $url Path to rss chanel
+	 */
+	public function __construct($url)
+	{
+		$this->url = $url;
+	}
+
+	public function rewind()
+	{
+		$this->position = 0;
+	}
+
+	public function key()
+	{
+		return $this->position;
+	}
+
+	public function current()
+	{
+		return $this->items[$this->position];
+	}
+
+	public function next()
+	{
+		$this->position++;
+	}
+
+	public function valid()
+	{
+		if (array_key_exists($this->position, $this->items)) {
+			return true;
+		}
+
+		if ($item = $this->read()) {
+			$this->items[$this->position] = $item;
+
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Open rss chanel for read
+	 * 
+	 * @throws Exception
+	 * 
+	 * @return DomNodeList
+	 */
+	protected function getSource()
+	{
+		if ($this->source === null)
+		{
+			$dom = new DomDocument('1.0');
+
+			if (!$dom->load($this->url)) {
+				throw new Exception('Unable open rss chanel');
+			}
+
+			$xpath = new DomXPath($dom);
+			$this->source = $xpath->query('//*/item');
+		}
+
+		return $this->source;
+	}
+
+	/**
+	 * Read rss item from chanel
+	 * 
+	 * @return array|false
+	 */
+	protected function read()
+	{
+		$items = $this->getSource();
+
+		if ($items->length <= $this->position) {
+			return false;
+		}
+
+		$node = $items->item($this->position);
+
+		return static::nodeToArray($node);
+	}
+
+	/**
+	 * Convert DomNode to array
+	 * 
+	 * @param DomNode $node
+	 * 
+	 * @return mixed
+	 */
+	protected static function nodeToArray($node)
+	{
+		return (array) simplexml_import_dom($node);
+	}
+}
+
+$rss = new RssReader('https://lenta.ru/rss');
+
+foreach ($rss as $index => $item)
+{
+	echo 'Название: '. $item['title'], PHP_EOL;
+	echo 'Ссылка: '. $item['link'], PHP_EOL;
+	echo $item['description'], PHP_EOL;
+	echo '----------------------------', PHP_EOL;
+
+	if ($index >= 4) {
+		break;
+	}
+}
\ No newline at end of file