silverstripe-blog/code/widgets/RSSWidget.php

<?php

class RSSWidget extends Widget {
	static $db = array(
		"RSSTitle" => "Text",
		"RssUrl" => "Text",
		"NumberToShow" => "Int"
	);
	
	static $has_one = array();
	
	static $has_many = array();
	
	static $many_many = array();
	
	static $belongs_many_many = array();
	
	static $defaults = array(
		"NumberToShow" => 10,
		"RSSTitle" => 'RSS Feed'
	);
	static $cmsTitle = "RSS Feed";
	static $description = "Downloads another page's RSS feed and displays items in a list.";
	
	/**
	 * If the RssUrl is relative, convert it to absolute with the
	 * current baseURL to avoid confusing simplepie.
	 * Passing relative URLs to simplepie will result
	 * in strange DNS lookups and request timeouts.
	 * 
	 * @return string
	 */
	function getAbsoluteRssUrl() {
		$urlParts = parse_url($this->RssUrl);
		if(!isset($urlParts['host']) || !$urlParts['host']) {
			return Director::absoluteBaseURL() . $this->RssUrl;
		} else {
			return $this->RssUrl;
		}
	}
	
	function getCMSFields() {
		$fields = parent::getCMSFields(); 
		
		$fields->merge(
			new FieldList(
				new TextField("RSSTitle", _t('RSSWidget.CT', "Custom title for the feed")),
				new TextField("RssUrl", _t('RSSWidget.URL', "URL of the other page's RSS feed.  Please make sure this URL points to an RSS feed.")),
				new NumericField("NumberToShow", _t('RSSWidget.NTS', "Number of Items to show"))
			)
		);
		
		$this->extend('updateCMSFields', $fields);
		
		return $fields;
	}
	function Title() {
		return ($this->RSSTitle) ? $this->RSSTitle : 'RSS Feed';
	}
	
	function getFeedItems() {
		$output = new DataObjectSet();

		// Protection against infinite loops when an RSS widget pointing to this page is added to this page 
		if(stristr($_SERVER['HTTP_USER_AGENT'], 'SimplePie')) { 
			return $output;
		}
		
		include_once(Director::getAbsFile(SAPPHIRE_DIR . '/thirdparty/simplepie/simplepie.inc'));
		
		$t1 = microtime(true);
		$feed = new SimplePie($this->AbsoluteRssUrl, TEMP_FOLDER);
		$feed->init();
		if($items = $feed->get_items(0, $this->NumberToShow)) {
			foreach($items as $item) {
				
				// Cast the Date
				$date = new Date('Date');
				$date->setValue($item->get_date());

				// Cast the Title
				$title = new Text('Title');
				$title->setValue($item->get_title());

				$output->push(new ArrayData(array(
					'Title' => $title,
					'Date' => $date,
					'Link' => $item->get_link()
				)));
			}
			return $output;
		}
	}
}

?>