first small step to an automatic updating system.

At the moment we only have a hint that a new version is avaiable and a link to a not yet existing page if updating information. This has to be improved.

lib/updater.php

+<?php
+/**
+ * ownCloud
+ *
+ * @author Frank Karlitschek
+ * @copyright 2010 Frank Karlitschek karlitschek@kde.org
+ *
+ * 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/>.
+ *
+ */
+
+/**
+ * Class that handels autoupdating of ownCloud
+ */
+class OC_Updater{
+
+	/**
+	 * Check if a new version is available
+	 */
+	public static function check(){
+		OC_Config::setValue('lastupdatedat',microtime(true));
+
+		$updaterurl='http://apps.owncloud.com/updater.php';
+		$version=OC_Util::getVersion();
+		$version['installed']=OC_Config::getValue( "installedat");
+		$version['updated']=OC_Config::getValue( "lastupdatedat");
+		$version['updatechannel']='stable';
+		$versionstring=implode('x',$version);
+
+		//fetch xml data from updater
+		$url=$updaterurl.'?version='.$versionstring;
+                $xml=@file_get_contents($url);
+                if($xml==FALSE){
+                        return array();
+                }
+                $data=@simplexml_load_string($xml);
+
+		$tmp=array();
+                $tmp['version'] = $data->version;
+                $tmp['versionstring'] = $data->versionstring;
+                $tmp['url'] = $data->url;
+                $tmp['web'] = $data->web;
+
+
+                return $tmp;
+
+	}
+
+
+
+	public static function ShowUpdatingHint(){
+		$data=OC_Updater::check();
+		if(isset($data['version']) and $data['version']<>'') {
+			$txt='<span style="color:#AA0000; font-weight:bold;">'.$data['versionstring'].' is available. Please click <a href="'.$data['web'].'">here</a> for more information</span>';
+		}else{
+			$txt='Your ownCloud is up to date';
+		}
+		return($txt);
+
+	}
+
+
+	/**
+	 * do ownCloud update
+	 */
+	public static function doUpdate(){
+
+		//update ownCloud core
+
+		//update all apps
+
+		//update version in config
+
+	}
+
+}
+
+
+
+?>