Little refactoring to reduce logic on index.php.

Moved RssExpander as a core logic system to lib/Bridge.php

Signed-off-by: teromene <teromene@teromene.fr>

lib/Bridge.php

@@ -293,6 +293,72 @@ class Bridge{
 
 		return $listBridge;
 	}
+	static function isWhitelisted( $whitelist, $name ) {
+	if(in_array("$name", $whitelist) or in_array("$name.php", $whitelist))
+		return TRUE;
+	else
+		return FALSE;
+	}
 
 }
 
+abstract class RssExpander extends HttpCachingBridgeAbstract{
+
+    public $name;
+    public $uri;
+    public $description;
+
+    public function collectExpandableDatas(array $param, $name){
+        if (empty($name)) {
+            $this->returnError('There is no $param[\'url\'] for this RSS expander', 404);
+        }
+//       $this->message("Loading from ".$param['url']);
+        // Notice WE DO NOT use cache here on purpose : we want a fresh view of the RSS stream each time
+        $rssContent = simplexml_load_file($name) or $this->returnError('Could not request '.$name, 404);
+//        $this->message("loaded RSS from ".$param['url']);
+        // TODO insert RSS format detection
+        // we suppose for now, we have some RSS 2.0
+        $this->collect_RSS_2_0_data($rssContent);
+    }
+
+    protected function collect_RSS_2_0_data($rssContent) {
+        $rssContent = $rssContent->channel[0];
+//        $this->message("RSS content is ===========\n".var_export($rssContent, true)."===========");
+        $this->load_RSS_2_0_feed_data($rssContent);
+        foreach($rssContent->item as $item) {
+//            $this->message("parsing item ".var_export($item, true));
+            $this->items[] = $this->parseRSSItem($item);
+        }
+    }
+
+    protected function RSS_2_0_time_to_timestamp($item)  {
+        return DateTime::createFromFormat('D, d M Y H:i:s e', $item->pubDate)->getTimestamp();
+    }
+
+    // TODO set title, link, description, language, and so on
+    protected function load_RSS_2_0_feed_data($rssContent) {
+        $this->name = trim($rssContent->title);
+        $this->uri = trim($rssContent->link);
+        $this->description = trim($rssContent->description);
+    }
+
+    /**
+     * Method should return, from a source RSS item given by lastRSS, one of our Items objects
+     * @param $item the input rss item
+     * @return a RSS-Bridge Item, with (hopefully) the whole content)
+     */
+    abstract protected function parseRSSItem($item);
+
+
+    public function getName(){
+        return $this->name;
+    }
+
+    public function getURI(){
+        return $this->uri;
+    }
+
+    public function getDescription() {
+        return $this->description;
+    }
+}