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<?php
/**
* ownCloud - News
*
* @author Alessandro Cosentino
* @author Bernhard Posselt
* @copyright 2012 Alessandro Cosentino cosenal@gmail.com
* @copyright 2012 Bernhard Posselt nukeawhale@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\News\Utility;
use \OCA\AppFramework\Core\API;
use \OCA\AppFramework\Utility\FaviconFetcher;
use \OCA\AppFramework\Utility\SimplePieAPIFactory;
use \OCA\AppFramework\Utility\TimeFactory;
use \OCA\News\Db\Item;
use \OCA\News\Db\Feed;
class FeedFetcher implements IFeedFetcher {
private $api;
private $cacheDirectory;
private $cacheDuration;
private $faviconFetcher;
private $simplePieFactory;
private $fetchTimeout;
private $time;
private $purifier;
public function __construct(API $api,
SimplePieAPIFactory $simplePieFactory,
FaviconFetcher $faviconFetcher,
TimeFactory $time,
$cacheDirectory,
$cacheDuration,
$fetchTimeout,
$purifier){
$this->api = $api;
$this->cacheDirectory = $cacheDirectory;
$this->cacheDuration = $cacheDuration;
$this->faviconFetcher = $faviconFetcher;
$this->simplePieFactory = $simplePieFactory;
$this->time = $time;
$this->purifier = $purifier;
$this->fetchTimeout = $fetchTimeout;
}
/**
* This fetcher handles all the remaining urls therefore always returns true
*/
public function canHandle($url){
return true;
}
/**
* Fetch a feed from remote
* @param string url remote url of the feed
* @throws FetcherException if simple pie fails
* @return array an array containing the new feed and its items
*/
public function fetch($url, $getFavicon=true) {
$simplePie = $this->simplePieFactory->getCore();
$simplePie->set_feed_url($url);
$simplePie->enable_cache(true);
$simplePie->set_timeout($this->fetchTimeout);
$simplePie->set_cache_location($this->cacheDirectory);
$simplePie->set_cache_duration($this->cacheDuration);
if (!$simplePie->init()) {
throw new FetcherException('Could not initialize simple pie on feed with url ' . $url);
}
try {
// somehow $simplePie turns into a feed after init
$items = array();
if ($feedItems = $simplePie->get_items()) {
foreach($feedItems as $feedItem) {
array_push($items, $this->buildItem($feedItem));
}
}
$feed = $this->buildFeed($simplePie, $url, $getFavicon);
return array($feed, $items);
} catch(\Exception $ex){
throw new FetcherException($ex->getMessage());
}
}
protected function buildItem($simplePieItem) {
$item = new Item();
$item->setStatus(0);
$item->setUnread();
$item->setUrl(
html_entity_decode($simplePieItem->get_permalink(), ENT_COMPAT, 'UTF-8')
);
// unescape content because angularjs helps against XSS
// unescape again to clean up stuff that was escaped
$item->setTitle(
html_entity_decode(
html_entity_decode($simplePieItem->get_title(), ENT_COMPAT, 'UTF-8'),
ENT_COMPAT, 'UTF-8')
);
$guid = $simplePieItem->get_id();
$item->setGuid($guid);
$item->setGuidHash(md5($guid));
// links should always open in a new window
$item->setBody(
str_replace(
'<a', '<a target="_blank"', $this->purifier->purify(
$simplePieItem->get_content()
)
)
);
// pubdate is not required. if not given use the current date
$date = $simplePieItem->get_date('U');
if(!$date) {
$date = $this->time->getTime();
}
$item->setPubDate($date);
$item->setLastModified($this->time->getTime());
$author = $simplePieItem->get_author();
if ($author !== null) {
$name = html_entity_decode($author->get_name(),
ENT_COMPAT, 'UTF-8' );
if ($name) {
$item->setAuthor($name);
} else {
$item->setAuthor(html_entity_decode($author->get_email()),
ENT_COMPAT, 'UTF-8' );
}
}
// TODO: make it work for video files also
$enclosure = $simplePieItem->get_enclosure();
if($enclosure !== null) {
$enclosureType = $enclosure->get_type();
if(stripos($enclosureType, "audio/") !== false) {
$item->setEnclosureMime($enclosureType);
$item->setEnclosureLink($enclosure->get_link());
}
}
return $item;
}
protected function buildFeed($simplePieFeed, $url, $getFavicon) {
$feed = new Feed();
// unescape content because angularjs helps against XSS
$title = html_entity_decode($simplePieFeed->get_title(),
ENT_COMPAT, 'UTF-8' );
// if there is no title use the url
if(!$title) {
$title = $url;
}
$feed->setTitle($title);
$feed->setUrl($url);
$feed->setLink($simplePieFeed->get_link());
$feed->setUrlHash(md5($url));
$feed->setAdded($this->time->getTime());
if ($getFavicon) {
// use the favicon from the page first since most feeds use a weird image
$favicon = $this->faviconFetcher->fetch($feed->getLink());
if (!$favicon) {
$favicon = $simplePieFeed->get_image_url();
}
$feed->setFaviconLink($favicon);
}
return $feed;
}
}
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