<?php
# Copyright 2001-2006 by VIKO team and contributors
# 
# This file is part of VIKO.
#
# VIKO 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 2 of the License, or
# (at your option) any later version.
#
# VIKO 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 VIKO; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


// require user to be authented
require_once("viko_auth.php");

// NB! Initializing gloabal variable
// Troubles ahead, stay tuned...
$course_id = $_REQUEST["course_id"];

// If user is teacher, admin or schooladmin
// query, if user is teacher of this course
// if user is student
// query, if user is student of this course
if($_SESSION['level'] > 0)
{
    $result = mysql_query("
        SELECT
            *
        FROM
            Courses
        WHERE
            teacher = '$_SESSION[user_id]' &&
            course_id = '$course_id'
    ");
}
else
{
    $result = mysql_query("
        SELECT
            *
        FROM
            Courses_Users
        WHERE
            user_id = '$_SESSION[user_id]' &&
            course_id = '$course_id'
    ");
}

// if user is neither teacher or student of this course: flag error
if(mysql_num_rows($result) == 0)
{
    header("Location: error2.php");
    exit();
}


?>