<?php
/*
 *  ConPortal - Pomona College ITS scheduling appplication
 *  Copyright (C) 2005-2006  Pomona College
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of version 2 of the GNU General Public License
 *  as published by the Free Software Foundation.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
require_once('../standard.php');

if (isset($_POST['pid']) && isset($_POST['timestamp']))
{
    // Cancel a shift in the database - if this fails, it will set the
    // session error message variables
    cancel_shift(intval($_POST['pid']), intval($_POST['timestamp']));
    if ($_SESSION['error'])
    {
        echo "<b>There was an error cancelling the shift: <br />";
        display_errors();
        echo "</b><br />\n";
    }
}

header("Location: ".$_SERVER['HTTP_REFERER']);
?>