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 * Hackademic-CMS/controller/class.HackademicController.php
 * Hackademic Controller
 * The parent class of all Hackademic CMS controllers
 * Copyright (c) 2012 OWASP
 * LICENSE:
 * This file is part of Hackademic CMS (https://www.owasp.org/index.php/OWASP_Hackademic_Challenges_Project).
 * Hackademic CMS 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.
 * Hackademic CMS 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 Hackademic CMS.  If not, see
 * <http://www.gnu.org/licenses/>.
 * @author Pragya Gupta <pragya18nsit[at]gmail[dot]com>
 * @author Konstantinos Papapanagiotou <conpap[at]gmail[dot]com>
 * @license http://www.gnu.org/licenses/gpl.html
 * @copyright 2012 OWASP
require_once(HACKADEMIC_PATH."model/common/class.SmartyHackademic.php");
require_once(HACKADEMIC_PATH."model/common/class.Session.php");
require_once(HACKADEMIC_PATH."controller/class.FrontendMenuController.php");
require_once(HACKADEMIC_PATH."controller/class.ChallengeMenuController.php");
require_once(HACKADEMIC_PATH."controller/class.UserMenuController.php");
require_once(HACKADEMIC_PATH."/esapi/class.Esapi_Utils.php");
abstract class HackademicController {
	 * @var Smarty Object
	protected $smarty;
	 * @var template path
	protected $tmpl;
	 * @var view template
	protected $view_template;
	 * @var array
	protected $header_scripts = array ();
	 * @var session_exists
	private static $session_exists;
	 * @var app_session
	private $app_session;
	 * Constructor to initialize the Main Controller
	public function __construct() {
		if (!self::$session_exists) {
			self::$session_exists = 1;
			Session::start(SESS_EXP_ABS);
			//var_dump("no session");
			//die("no session");
		if(!isset($_GET['token']) && isset($_SESSION['hackademic_user'])){
			//die("not token but session");
			error_log("HACKADEMIC:: not token but session", 0);
			header('Location:'.SOURCE_ROOT_PATH."pages/mainlogin.php");
		if(isset($_SESSION['hackademic_user']) && !Session::isValid()){
			//die(" session but not valid");
			//error_log("session but not valid", 0);
			Session::logout();
			header('Location:'.SOURCE_ROOT_PATH."pages/home.php");
			//var_dump($_SESSION);
			$this->smarty = new SmartyHackademic();
			$this->app_session = new Session();
			if ($this->isLoggedIn()) {
				$this->addToView('is_logged_in', true);
				$this->addToView('logged_in_user', $this->getLoggedInUser());
			if ($this->isAdmin()) {
				$this->addToView('user_type', true);
			$menu=FrontendMenuController::go();
			$this->addToView('main_menu',$menu);
			$challenge_menu=ChallengeMenuController::go();
			$this->addToView('challenge_menu',$challenge_menu);
			if($this->isLoggedIn()){
				$usermenu=UserMenuController::go();
				$this->addToView('user_menu',$usermenu);
	 * Add javascript to header
	 * @param str javascript path
	public function addHeaderJavaScript($script) {
		array_push($this->header_scripts, $script);
	 * Set Page Title
	 * @param $title str Page Title
	public function addPageTitle($title) {
		self::addToView('controller_title', $title);
	 * Function to set view template
	 * @param $tmpl str Template name
	public function setViewTemplate($tmpl) {
		$this->view_template = HACKADEMIC_PATH.'view/'.$tmpl;
	 * Generate View In Smarty
	public function generateView() {
		$view_path = $this->view_template;
		$this->addToView('header_scripts', $this->header_scripts);
		return $this->smarty->display($view_path);
	 * Add error message to view
	 * @param str $msg
	public function addErrorMessage($msg) {
		$this->disableCaching();
		$this->addToView('errormsg', $msg );
	 * Add success message to view
	 * @param str $msg
	public function addSuccessMessage($msg) {
		$this->disableCaching();
		$this->addToView('successmsg', $msg );
	 * Disable Caching
	protected function disableCaching() {
		$this->smarty->disableCaching();
	 * Returns whether or not Hackademic user is logged in
	 * @return bool whether or not user is logged in
	protected function isLoggedIn() {
		return Session::isLoggedIn();
	 * Function to add data to Smarty Template
	 * @param $key str Variable name in Smarty
	 * @param $value str Variable value in Smarty
	public function addToView($key,$value) {
		$this->smarty->assign($key, $value);
	 * Returns whether or not a logged-in Hackademic user is an admin
	 * @return bool whether or not logged-in user is an admin
	protected function isAdmin() {
		return Session::isAdmin();
	 * Returns whether or not a logged-in Hackademic user is a teacher
	 * @return bool whether or not logged-in user is an admin
	protected function isTeacher() {
		return Session::isTeacher();
	 * Return username of logged-in user
	 * @return str username
	public function getLoggedInUser() {
		return Session::getLoggedInUser();
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