provide a logging mechanism

lib/app.php

@@ -222,6 +222,8 @@ class OC_App{
 				$settings[] = array( "id" => "core_users", "order" => 2, "href" => OC_Helper::linkTo( "settings", "users.php" ), "name" => $l->t("Users"), "icon" => OC_Helper::imagePath( "settings", "users.svg" ));
 				// admin apps menu
 				$settings[] = array( "id" => "core_apps", "order" => 3, "href" => OC_Helper::linkTo( "settings", "apps.php?installed" ), "name" => $l->t("Apps"), "icon" => OC_Helper::imagePath( "settings", "apps.svg" ));
+				// admin log menu
+				$settings[] = array( "id" => "core_log", "order" => 4, "href" => OC_Helper::linkTo( "settings", "log.php" ), "name" => $l->t("Log"), "icon" => OC_Helper::imagePath( "log", "apps.svg" ));
 
 				// if there're some admin forms
 				if(!empty(self::$adminForms))

lib/log.php

+<?php
+/**
+ * ownCloud
+ *
+ * @author Robin Appelman
+ * @copyright 2011 Robin Appelman icewind1991@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/>.
+ *
+ */
+
+/**
+ *logging utilities
+ *
+ * Log is saved at data/owncloud.log (on default)
+ */
+
+class OC_Log{
+	const DEBUG=0;
+	const INFO=1;
+	const WARN=2;
+	const ERROR=3;
+	const FATAL=4;
+
+	/**
+	 * write a message in the log
+	 * @param string $app
+	 * @param string $message
+	 * @param int level
+	 */
+	public static function write($app,$message,$level){
+		$minLevel=OC_Config::getValue( "loglevel", 2 );
+		if($level>$minLevel){
+			$datadir=OC_Config::getValue( "datadirectory", OC::$SERVERROOT.'/data' );
+			$logFile=OC_Config::getValue( "logfile", $datadir.'/owncloud.log' );
+			$entry=array('app'=>$app,'message'=>$message,'level'=>$level,'time'=>time());
+			$fh=fopen($logFile,'a');
+			fwrite($fh,json_encode($entry)."\n");
+			fclose($fh);
+		}
+	}
+	
+	public static function getEntries(){
+		$datadir=OC_Config::getValue( "datadirectory", OC::$SERVERROOT.'/data' );
+		$logFile=OC_Config::getValue( "logfile", $datadir.'/owncloud.log' );
+		$entries=array();
+		if(!file_exists($logFile)){
+			return array();
+		}
+		$fh=fopen($logFile,'r');
+		while(!feof($fh)){
+			$line=fgets($fh);
+			if($line){
+				$entries[]=json_decode($line);
+			}
+		}
+		fclose($fh);
+		return $entries;
+	}
+}

settings/log.php

+<?php
+/**
+ * ownCloud
+ *
+ * @author Robin Appelman
+ * @copyright 2011 Robin Appelman icewind1991@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/>.
+ *
+ */
+
+require_once('../lib/base.php');
+OC_Util::checkAdminUser();
+
+// Load the files we need
+OC_Util::addStyle( "settings", "settings" );
+OC_Util::addScript( "settings", "apps" );
+OC_App::setActiveNavigationEntry( "core_log" );
+
+$entries=OC_Log::getEntries();
+
+function compareEntries($a,$b){
+	return $b->time-$a>time;
+}
+usort($entries, 'compareEntries');
+
+$tmpl = new OC_Template( "settings", "log", "user" );
+$tmpl->assign('entries',$entries);
+
+$tmpl->printPage();

settings/templates/log.php

+<?php /**
+ * Copyright (c) 2011, Robin Appelman <icewind1991@gmail.com>
+ * This file is licensed under the Affero General Public License version 3 or later.
+ * See the COPYING-README file.
+ */
+$levels=array('DEBUG','INFO','WARN','ERROR','FATAL');
+?>
+
+<div id="controls">
+	
+</div>
+<table>
+	<?php foreach($_['entries'] as $entry):?>
+		<tr>
+			<td>
+				<?php echo $levels[$entry->level];?>
+			</td>
+			<td>
+				<?php echo $entry->app;?>
+			</td>
+			<td>
+				<?php echo $entry->message;?>
+			</td>
+			<td>
+				<?php echo $l->l('datetime',$entry->time);?>
+			</td>
+		</tr>
+	<?php endforeach;?>
+</table>
\ No newline at end of file