reorganize folder

2 files changed, 292 insertions, 0 deletions

diff --git a/utility/opmlexporter.php b/utility/opmlexporter.php
new file mode 100644
index 000000000..d9d404ff1
--- /dev/null
+++ b/utility/opmlexporter.php
@@ -0,0 +1,84 @@
+<?php
+
+/**
+* ownCloud - News app
+*
+* @author Alessandro Cosentino
+* Copyright (c) 2012 - Alessandro Cosentino <cosenal@gmail.com>
+*
+* This file is licensed under the Affero General Public License version 3 or later.
+* See the COPYING-README file
+*
+*/
+
+namespace OCA\News;
+
+/**
+* Exports the OPML
+*/
+class OPMLExporter {
+	
+	private $api;
+	private $trans;
+
+	public function __construct($api){
+		$this->api = $api;
+		$this->trans = $api->getTrans();
+	}
+
+
+	/**
+	 * Generates the OPML for the active user
+	 * @return the OPML as string
+	 */
+	public function buildOPML($feeds){
+		$dom = new \DomDocument('1.0', 'UTF-8');
+		$dom->formatOutput = true;
+
+		$opml_el = $dom->createElement('opml');
+		$opml_el->setAttribute('version', '2.0');
+
+		$head_el = $dom->createElement('head');
+
+		$title = $this->api->getUserId() . ' ' . 
+					$this->trans->t('subscriptions in ownCloud - News');
+		$title_el = $dom->createElement('title', $title);
+
+		$head_el->appendChild( $title_el );
+		$opml_el->appendChild( $head_el );
+		$body_el = $dom->createElement('body');
+
+		$this->feedsToXML($feeds, $body_el, $dom);
+
+		$opml_el->appendChild( $body_el );
+		$dom->appendChild( $opml_el );
+
+		return $dom->saveXML();
+	}
+
+
+	/**
+	 * Creates the OPML content recursively
+	 */
+	protected function feedsToXML($data, $xml_el, $dom) {
+
+		foreach($data as $collection) {
+			$outline_el = $dom->createElement('outline');
+			if ($collection instanceOf Folder) {
+				$outline_el->setAttribute('title', $collection->getName());
+				$outline_el->setAttribute('text', $collection->getName());
+				$this->feedsToXML($collection->getChildren(), $outline_el, $dom);
+			}
+			elseif ($collection instanceOf Feed) {
+				$outline_el->setAttribute('title', $collection->getTitle());
+				$outline_el->setAttribute('text', $collection->getTitle());
+				$outline_el->setAttribute('type', 'rss');
+				$outline_el->setAttribute('xmlUrl', $collection->getUrl());
+			}
+			$xml_el->appendChild( $outline_el );
+		}
+	}
+
+
+}
+
diff --git a/utility/utils.php b/utility/utils.php
new file mode 100644
index 000000000..560114ca7
--- /dev/null
+++ b/utility/utils.php
@@ -0,0 +1,208 @@
+<?php
+/**
+* ownCloud - News app
+*
+* @author Alessandro Cosentino
+* Copyright (c) 2012 - Alessandro Cosentino <cosenal@gmail.com>
+*
+* This file is licensed under the Affero General Public License version 3 or later.
+* See the COPYING-README file
+*
+*/
+
+namespace OCA\News;
+
+// load SimplePie library
+//TODO: is this a suitable place for the following require?
+require_once 'news/3rdparty/SimplePie/autoloader.php';
+
+class Utils {
+
+	/**
+	 * @brief Transform a date from UNIX timestamp format to MDB2 timestamp format
+	 * @param dbtimestamp a date in the UNIX timestamp format
+	 * @returns a date in the MDB2 timestamp format, or NULL if an error occurred
+	 */
+	public static function unixtimeToDbtimestamp($unixtime) {
+		if ($unixtime === null) {
+			return null;
+		}
+		$dt = \DateTime::createFromFormat('U', $unixtime);
+		if ($dt === false) {
+			return null;
+		}
+		return $dt->format('Y-m-d H:i:s');
+	}
+
+	/**
+	 * @brief Transform a date from MDB2 timestamp format to UNIX timestamp format
+	 * @param dbtimestamp a date in the MDB2 timestamp format
+	 * @returns a date in the UNIX timestamp format, or NULL if an error occurred
+	 */
+	public static function dbtimestampToUnixtime($dbtimestamp) {
+		if ($dbtimestamp === null) {
+			return null;
+		}
+		$dt = \DateTime::createFromFormat('Y-m-d H:i:s', $dbtimestamp);
+		if ($dt === false) {
+			return null;
+		}
+		return $dt->format('U');
+	}
+
+	/**
+	 * @brief Fetch a feed from remote
+	 * @param url remote url of the feed
+	 * @returns an instance of OC_News_Feed
+	 */
+	public static function fetch($url) {
+		$spfeed = new \SimplePie_Core();
+		$spfeed->set_feed_url( $url );
+		$spfeed->enable_cache( false );
+
+		if (!$spfeed->init()) {
+			return null;
+		}
+
+		//temporary try-catch to bypass SimplePie bugs
+		try {
+			$spfeed->handle_content_type();
+			$title = $spfeed->get_title();
+
+			$items = array();
+			if ($spitems = $spfeed->get_items()) {
+				foreach($spitems as $spitem) {
+					$itemUrl = $spitem->get_permalink();
+					$itemTitle = $spitem->get_title();
+					$itemGUID = $spitem->get_id();
+					$itemBody = $spitem->get_content();
+					$item = new Item($itemUrl, $itemTitle, $itemGUID, $itemBody);
+					
+					$spAuthor = $spitem->get_author();
+					if ($spAuthor !== null) {
+						$item->setAuthor($spAuthor->get_name());
+					}
+
+					//date in Item is stored in UNIX timestamp format
+					$itemDate = $spitem->get_date('U');
+					$item->setDate($itemDate);
+
+					// associated media file, for podcasts
+					$itemEnclosure = $spitem->get_enclosure();
+					if($itemEnclosure !== null) {
+						$enclosureType = $itemEnclosure->get_type();
+						$enclosureLink = $itemEnclosure->get_link();
+						if(stripos($enclosureType, "audio/") !== FALSE) {
+							$enclosure = new Enclosure();
+							$enclosure->setMimeType($enclosureType);
+							$enclosure->setLink($enclosureLink);
+							$item->setEnclosure($enclosure);
+						}
+					}
+					
+					$items[] = $item;
+				}
+			}
+
+			$feed = new Feed($url, $title, $items);
+
+			$favicon = $spfeed->get_image_url();
+
+			if ($favicon !== null && self::checkFavicon($favicon)) { // use favicon from feed
+				$feed->setFavicon($favicon);
+			}
+			else { // try really hard to find a favicon
+				$webFavicon = self::discoverFavicon($url);
+				if ($webFavicon !== null) {
+					$feed->setFavicon($webFavicon);
+				}
+			}
+			return $feed;
+		}
+	  catch (Exception $e) {
+			return null;
+	  }
+	}
+
+	/**
+	 * Perform a "slim" fetch of a feed from remote.
+	 * Differently from Utils::fetch(), it doesn't retrieve items nor a favicon
+	 *
+	 * @param url remote url of the feed
+	 * @returns an instance of OC_News_Feed
+	 */
+	public static function slimFetch($url) {
+		$spfeed = new \SimplePie_Core();
+		$spfeed->set_feed_url( $url );
+		$spfeed->enable_cache( false );
+		$spfeed->set_stupidly_fast( true );
+
+		if (!$spfeed->init()) {
+			return null;
+		}
+
+	   //temporary try-catch to bypass SimplePie bugs
+	   try {
+		$title = $spfeed->get_title();
+
+		$feed = new Feed($url, $title);
+
+		return $feed;
+		}
+	   catch (Exception $e) {
+		return null;
+	   }
+	}
+
+	public static function checkFavicon($favicon) {
+		if ($favicon === null || $favicon == false)
+			return false;
+
+		$file = new \SimplePie_File($favicon);
+		// size in bytes
+		$filesize = strlen($file->body);
+
+		if($file->success && $filesize > 0 && $filesize < 50000) { //bigger files are not considered favicons
+			$sniffer = new \SimplePie_Content_Type_Sniffer($file);
+			if(substr($sniffer->get_type(), 0, 6) === 'image/') {
+				$imgsize = getimagesize($favicon);
+				if ($imgsize['0'] <= 32 && $imgsize['1'] <= 32) { //bigger images are not considered favicons
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
+	public static function discoverFavicon($url) {
+		//try webroot favicon
+		$favicon = \SimplePie_Misc::absolutize_url('/favicon.ico', $url);
+
+		if(self::checkFavicon($favicon))
+			return $favicon;
+
+		//try to extract favicon from web page
+		$absoluteUrl = \SimplePie_Misc::absolutize_url('/', $url);
+
+		$handle = curl_init ( );
+		curl_setopt ( $handle, CURLOPT_URL, $absoluteUrl );
+		curl_setopt ( $handle, CURLOPT_RETURNTRANSFER, 1 );
+		curl_setopt ( $handle, CURLOPT_FOLLOWLOCATION, TRUE );
+		curl_setopt ( $handle, CURLOPT_MAXREDIRS, 10 );
+
+		if ( FALSE!==($page=curl_exec($handle)) ) {
+			preg_match ( '/<[^>]*link[^>]*(rel=["\']icon["\']|rel=["\']shortcut icon["\']) .*href=["\']([^>]*)["\'].*>/iU', $page, $match );
+			if (1<sizeof($match)) {
+				// the specified uri might be an url, an absolute or a relative path
+				// we have to turn it into an url to be able to display it out of context
+				$favicon = htmlspecialchars_decode ( $match[2] );
+				// test for an url
+				if (parse_url($favicon,PHP_URL_SCHEME)) {
+					if(self::checkFavicon($favicon))
+						return $favicon;
+				}
+			}
+		}
+		return null;
+	}
+}
\ No newline at end of file