<?php
/**
 * Copyright 2009, 2010 AEGEE-Europe
 *
 * This file is part of AEGEE-Europe Online Membership System.
 *
 * AEGEE-Europe Online Membership System is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * AEGEE-Europe Online Membership System 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AEGEE-Europe Online Membership System.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

/**
 * Provides a logger
 */

class Logger {
	private $logfile;
	private $messages;

	/**
	 * Constructor
	 *
	 * @param string logfile
	 */
	public function __construct($logfile) {
		$this->logfile = $logfile;
		$this->messages = array();
	}

	/**
	 * Log an error to file
	 *
	 * @param string error message to be logged
	 */
	public function error($msg) {
		$this->dolog("ERROR", $msg);
		$this->messages[] = array("Severity"=>"ERROR", "Message"=>$msg);
	}

	/**
	 * Log a warning to file
	 *
	 * @param string warning message to be logged
	 */
	public function warn($msg) {
		$this->dolog("WARN", $msg);
		$this->messages[] = array("Severity"=>"WARN", "Message"=>$msg);
	}

	/**
	 * Log an info message to file
	 *
	 * @param string info message to be logged
	 */
	public function info($msg) {
		$this->dolog("INFO", $msg);
		$this->messages[] = array("Severity"=>"INFO", "Message"=>$msg);
	}

	/**
	 * Get the logged messages
	 *
	 * @return array of logged messages. Each entry consists of an array with 'Severity' and 'Message' as key.
	 */
	public function getMessages() {
		return $this->messages;
	}

	/**
	 * Log a message
	 *
	 * @param string severity of the message
	 * @param string log message
	 */
	private function dolog($severity, $msg) {
		if( $this->logfile!=NULL ) {
			if( ($fp = @fopen($this->logfile, "a"))!==false ) {
				fwrite($fp, date("Y-m-d H:i:s")." ".$severity.": ".$msg." (in ".$_SERVER['REQUEST_URI']." requested from ".$_SERVER['REMOTE_ADDR']." by '".(isset($_SESSION['sess_uid'])?$_SESSION['sess_uid']:"*anonymous*")."')\n");
				fclose($fp);
			}else {
				$this->messages[] = array("Severity"=>"ERROR", "Message"=>"Failed opening log file: ".$this->logfile);
			}
		}
	}
}
?>