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 * Hackademic-CMS/controller/class.ReadArticleController.php
 * Hackademic Frontend Read Article Controller
 * Class for creating the frontend Main Menu
 * 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.ChallengeAttempts.php");
require_once(HACKADEMIC_PATH."/model/common/class.User.php");
require_once(HACKADEMIC_PATH."/model/common/class.UserScore.php");
require_once(HACKADEMIC_PATH."/admin/model/class.ClassMemberships.php");
require_once(HACKADEMIC_PATH."/controller/class.HackademicController.php");
class RankingsController extends HackademicController {
    public function go() {
        $this->setViewTemplate("rankings.tpl");
        if ($this->isLoggedIn()) {
            $username = $this->getLoggedInUser();
            if (Session::isAdmin() || Session::isTeacher()) {
                $classes = Classes::getAllClasses();
            } else {
                $user = User::findByUserName($username);
                $classes = ClassMemberships::getMembershipsOfUserObjects($user->id);
            $this->addToView('classes', $classes);
        if (!isset($_GET["class"]) || $_GET["class"]=="") {
            $rankings = ChallengeAttempts::getUniversalRankings();
            $class_id = GLOBAL_CLASS_ID;
        } else {
            $class_id = $_GET["class"];
            $class = Classes::getClass($class_id);
            if (!$class) {
                $this->addErrorMessage("Not a valid class");
                return $this->generateView();
            } else {
                $rankings = ChallengeAttempts::getClasswiseRankings($class_id);
        $final=array();
        $counter=1;
        $rank=1;
        $rankcount=1;
        $prevcount=null;
      foreach($rankings as $ranking){
				if($ranking['user_id'] != NULL){
					if ($counter !=1 && $prevcount == $ranking['tries']) {$rank=$rankcount; /*$rankcount++;*/}
					if  ($counter !=1 && $prevcount != $ranking['tries']) {$rankcount++; $rank=$rankcount;}
					$user_points = $this->calc_user_pts($ranking['user_id'], $class_id);
					$prevcount=$ranking['tries'];
					$counter++;
					$temp=array('user_id'=>$ranking['user_id'],'count' =>$ranking['tries'],'username'=>$ranking['username'],'rank'=>$rank,'score' => $user_points);
					array_push($final,$temp);
        $this->addToView('rankings', $final);
        return $this->generateView();
    private function calc_user_pts($user_id, $class_id = -1){
			$points = 0;
			if($class_id == -1){
				$scores = UserScore::get_scores_for_user($user_id);
				$scores = UserScore::get_scores_for_user_class($user_id, $class_id);
			if( $scores != false){
				foreach($scores as $score_obj){
					$points += $score_obj->points;
			return $points;

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