<?php 
/*******************************************************************************
 * Copyright (c) 2007 Eclipse Foundation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Denis Roy (Eclipse Foundation)- initial implementation
 *******************************************************************************/
 
 
    #*****************************************************************************
    #
    # redirector.php
    #
    # Author:       Denis Roy
    # Date:         2007-09-07
    #
    # Description:  redirector for campaign URL tracking
    #
    #
    #*****************************************************************************

	require_once($_SERVER['DOCUMENT_ROOT'] . "/eclipse.org-common/system/app.class.php");
	require_once "/home/data/httpd/eclipse-php-classes/system/dbconnection_rw.class.php";
	$App 	= new App();
	
	# get the incoming parameters
    $_TAG = $App->getHTTPParameter("tag", "GET");

	if(strlen($_TAG) < 1) {
    	# error
    	header("Location: /");
    }
    
    # strip potentially bad characters from file
	$_TAG = preg_replace('/["\'?%$#@!;*&]/i', '', $_TAG);


	# Connect to databases
	$dbc_RW 	= new DBConnectionRW();
	$dbh_RW		= $dbc_RW->connect();


	$SQL = "SELECT TargetUrl FROM Campaigns WHERE CampaignKey = " . $App->returnQuotedString($_TAG) . " AND DateExpires > CURDATE()";
	$rs 	= mysql_query($SQL, $dbh_RW);
	
	if($myrow = mysql_fetch_assoc($rs)) {
		# redirect the browser now
		header("Location: " . $myrow['TargetUrl']);
		
		# track the click
		# Do a reverse lookup on the client IP
		$client_hostname = @gethostbyaddr($_SERVER['REMOTE_ADDR']) ;
		$SQL = "INSERT INTO CampaignClicks (
					ClickID,
  					CampaignKey,
  					SubKey,
  					HostName,
  					TimeClicked) VALUES (
  					NULL,
  					" . $App->returnQuotedString($_TAG) . ",
  					NULL,
  					" . $App->returnQuotedString($client_hostname) . ",
  					NOW())";
		
		mysql_query($SQL, $dbh_RW);
	}
	else {
		# error finding Campaign
		header("Location: /");
	}
	
	$dbc_RW->disconnect();  # disconnects all pending DB connections
	$rs 	= null;
	$dbh_RW	= null;
	$dbc_RW = null;

?>