chamilo-lms2/main/exercise/exercise_submit_modal.php

<?php
/* For licensing terms, see /license.txt */

use \ChamiloSession as Session;

/**
*	@package chamilo.exercise
* 	@author Julio Montoya <gugli100@gmail.com>
*/

//require_once '../inc/global.inc.php';
api_protect_course_script(false);

require_once api_get_path(LIBRARY_PATH).'geometry.lib.php';

Display::display_reduced_header();

echo '<div id="delineation-container">';

$message = null;
$dbg_local = 0;
$gradebook = null;

$final_overlap = null;
$final_missing = null;
$final_excess = null;
$threadhold1 = null;
$threadhold2 = null;
$threadhold3 = null;

$exerciseResult = [];

if (Session::has('exerciseResult')) {
    $exerciseResult = Session::read('exerciseResult');
}

$exerciseResultCoordinates = isset($_REQUEST['exerciseResultCoordinates']) ? $_REQUEST['exerciseResultCoordinates'] : null;

if (empty($origin)) {
    $origin = Security::remove_XSS($_REQUEST['origin']);
}
// if origin is learnpath
$learnpath_id = 0;

if (isset($_REQUEST['learnpath_id'])) {
	$learnpath_id = intval($_REQUEST['learnpath_id']);
}

$learnpath_item_id = 0;

if (isset($_REQUEST['learnpath_item_id'])) {
	$learnpath_item_id = intval($_REQUEST['learnpath_item_id']);
}

$_SESSION['hotspot_coord']=array();
$newquestionList= isset($_SESSION['newquestionList']) ? $_SESSION['newquestionList'] : [];
$questionList 	= $_SESSION['questionList'];

$exerciseId		= intval($_GET['exerciseId']);
$exerciseType	= intval($_GET['exerciseType']);
$questionNum	= intval($_GET['num']);
$nbrQuestions	= isset($_GET['nbrQuestions']) ? intval($_GET['nbrQuestions']) : null;

//clean extra session variables
Session::erase('objExerciseExtra'.$exerciseId);
Session::erase('exerciseResultExtra'.$exerciseId);
Session::erase('questionListExtra'.$exerciseId);

//round-up the coordinates
$user_array = '';

if (isset($_GET['hotspot'])) {
    $coords = explode('/', $_GET['hotspot']);

    if (is_array($coords) && count($coords) > 0) {
        foreach ($coords as $coord) {
            if (!empty($coord)) {
                list($x, $y) = explode(';', $coord);
                $user_array .= round($x).';'.round($y).'/';
            }
        }
    }
}

$choice_value = '';

$user_array = substr($user_array,0,-1);

if (isset($_GET['choice'])){
    $choice_value = intval($_GET['choice']);
}

// Getting the options by js
if (empty($choice_value)) {

	echo "<script>
		// this works for only radio buttons
		var f = self.parent.window.document.frm_exercise;
		var choice_js='';

		var hotspot = new Array();
		var hotspotcoord = new Array();
		var counter=0;
		for ( var i = 0; i < f.elements.length; i++ ) {
			if (f.elements[i].type=='radio' && f.elements[i].checked) {
				choice_js = f.elements[i].value;
                counter ++;
			}

			if (f.elements[i].type=='hidden' ) {
				name = f.elements[i].name;
				if (name.substr(0,7)=='hotspot')
					hotspot.push(f.elements[i].value);

				if (name.substr(0,20)=='hotspot_coordinates')
					hotspotcoord.push(f.elements[i].value);
			}
		}

		if (counter==0) {
			choice_js=-1; // this is an error
		}

	";
	// IMPORTANT
	//this is the real redirect function
	//echo 'window.location.href = "exercise_submit_modal.php?learnpath_id='.$learnpath_id.'&learnpath_item_id='.$learnpath_item_id.'&hotspotcoord="+ hotspotcoord + "&hotspot="+ hotspot + "&choice="+ choice_js + "&exerciseId='.$exerciseId.'&num='.$questionNum.'&exerciseType='.$exerciseType.'&origin='.$origin.'&gradebook='.$gradebook.'";';
    echo ' url = "exercise_submit_modal.php?learnpath_id='.$learnpath_id.'&learnpath_item_id='.$learnpath_item_id.'&hotspotcoord="+ hotspotcoord + "&hotspot="+ hotspot + "&choice="+ choice_js + "&exerciseId='.$exerciseId.'&num='.$questionNum.'&exerciseType='.$exerciseType.'&origin='.$origin.'&gradebook='.$gradebook.'";';
    echo "$('#global-modal .modal-body').load(url);";
	echo '</script>';

    exit;
}

$choice = array();
$questionid= $questionList[$questionNum];
// $choice_value => value of the user selection
$choice[$questionid] = isset($choice_value) ? $choice_value : null;

// initializing
if (!is_array($exerciseResult)) {
    $exerciseResult = array();
}

// if the user has answered at least one question
if (is_array($choice)) {
    if ($exerciseType == EXERCISE_FEEDBACK_TYPE_DIRECT) {
        // $exerciseResult receives the content of the form.
        // Each choice of the student is stored into the array $choice
        $exerciseResult = $choice;
    } else {
        // gets the question ID from $choice. It is the key of the array
        list($key)=array_keys($choice);
        // if the user didn't already answer this question
        if(!isset($exerciseResult[$key])) {
            // stores the user answer into the array
            $exerciseResult[$key]=$choice[$key];
        }
    }
}

// the script "exercise_result.php" will take the variable $exerciseResult from the session

Session::write('exerciseResult', $exerciseResult);
Session::write('exerciseResultCoordinates', $exerciseResultCoordinates);

/*
// if it is the last question (only for a sequential exercise)
if($questionNum >= $nbrQuestions)
{
    if($debug>0){echo str_repeat('&nbsp;',0).'Redirecting to exercise_result.php - Remove debug option to let this happen'."<br />\n";}
	// goes to the script that will show the result of the exercise
    // header("Location: exercise_result.php?origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id");
  	// echo 'location result';
}*/

// gets the student choice for this question
//print_r($choice); echo "<br>";


// creates a temporary Question object
if (in_array($questionid, $questionList)) {
	$objQuestionTmp 	= Question :: read($questionid);
	$questionName		=$objQuestionTmp->selectTitle();
	$questionDescription=$objQuestionTmp->selectDescription();
	$questionWeighting	=$objQuestionTmp->selectWeighting();
	$answerType			=$objQuestionTmp->selectType();
	$quesId				=$objQuestionTmp->selectId(); //added by priya saini
}

$objAnswerTmp=new Answer($questionid);
$nbrAnswers=$objAnswerTmp->selectNbrAnswers();
//echo 'answe_type '.$answerType;echo '<br />';

$choice = $exerciseResult[$questionid];
$destination=array();
$comment='';
$next=1;
$_SESSION['hotspot_coord'] = array();
$_SESSION['hotspot_dest'] = array();

$overlap_color = $missing_color = $excess_color=false;
$organs_at_risk_hit = 0;
$wrong_results = false;
$hot_spot_load = false;

$questionScore = 0;
$totalScore = 0;

if (!empty($choice_value)) {
	for ($answerId=1;$answerId <= $nbrAnswers;$answerId++) {
		$answer            = $objAnswerTmp->selectAnswer($answerId);
		$answerComment     = $objAnswerTmp->selectComment($answerId);
		$answerDestination = $objAnswerTmp->selectDestination($answerId);

		$answerCorrect     = $objAnswerTmp->isCorrect($answerId);
		$answerWeighting   = $objAnswerTmp->selectWeighting($answerId);
		$numAnswer         = $objAnswerTmp->selectAutoId($answerId);

		//delineation
		$delineation_cord  = $objAnswerTmp->selectHotspotCoordinates(1);
		$answer_delineation_destination=$objAnswerTmp->selectDestination(1);
        if ($dbg_local>0) { error_log(__LINE__.' answerId: '.$answerId.'('.$answerType.') - user delineation_cord: '.$delineation_cord.' - $answer_delineation_destination: '.$answer_delineation_destination,0);}

		switch($answerType) {
			// for unique answer
			case UNIQUE_ANSWER :
				$studentChoice = ($choice_value == $numAnswer)?1:0;
				if ($studentChoice) {
					$questionScore	+=$answerWeighting;
					$totalScore		+=$answerWeighting;
					$newquestionList[]=$questionid;
				}
				break;
			case HOT_SPOT_DELINEATION :
			    $studentChoice=$choice[$answerId];
				if ($studentChoice) {
					$newquestionList[]=$questionid;
				}
				if ($answerId===1) {
					$questionScore	+=$answerWeighting;
					$totalScore		+=$answerWeighting;
					$_SESSION['hotspot_coord'][1]	=$delineation_cord;
					$_SESSION['hotspot_dest'][1]	=$answer_delineation_destination;
				}
				break;
		}


        if ($answerType == UNIQUE_ANSWER || $answerType == MULTIPLE_ANSWER) {
            //display_unique_or_multiple_answer($answerType, $studentChoice, $answer, $answerComment, $answerCorrect);
            if ($studentChoice) {
                $destination = $answerDestination;
                $comment = $answerComment;
            }
        } elseif($answerType == HOT_SPOT_DELINEATION) {
            if ($next) {
                if ($dbg_local>0) { error_log(__LINE__.' - next',0);}
                $hot_spot_load = true; //apparently the script is called twice
                $user_answer = $user_array;
                $_SESSION['exerciseResultCoordinates'][$questionid]=$user_answer; //needed for exercise_result.php

                // we compare only the delineation not the other points
                $answer_question	= $_SESSION['hotspot_coord'][1];
                $answerDestination	= $_SESSION['hotspot_dest'][1];

                $poly_user 				= convert_coordinates($user_answer,'/');
                $poly_answer 			= convert_coordinates($answer_question,'|');
                $max_coord 				= poly_get_max($poly_user,$poly_answer);

                if (empty($_GET['hotspot'])) { //no user response
                    $overlap = -2;
                } else {
                    $poly_user_compiled 	= poly_compile($poly_user,$max_coord);
                    $poly_answer_compiled 	= poly_compile($poly_answer,$max_coord);
                    $poly_results 			= poly_result($poly_answer_compiled,$poly_user_compiled,$max_coord);

                    $overlap = $poly_results['both'];
                    $poly_answer_area = $poly_results['s1'];
                    $poly_user_area = $poly_results['s2'];
                    $missing = $poly_results['s1Only'];
                    $excess = $poly_results['s2Only'];
                }

                //$overlap = round(polygons_overlap($poly_answer,$poly_user)); //this is an area in pixels
                if ($dbg_local>0) { error_log(__LINE__.' - Polygons results are '.print_r($poly_results,1),0);}
                if ($overlap < 1) {
                    //shortcut to avoid complicated calculations
                    $final_overlap = 0;
                    $final_missing = 100;
                    $final_excess  = 100;
                } else {
                    // the final overlap is the percentage of the initial polygon that is overlapped by the user's polygon
                    $final_overlap = round(((float)$overlap / (float)$poly_answer_area)*100);
                    if ($dbg_local>1) { error_log(__LINE__.' - Final overlap is '.$final_overlap,0);}
                    // the final missing area is the percentage of the initial polygon that is not overlapped by the user's polygon
                    $final_missing = 100 - $final_overlap;
                    if ($dbg_local>1) { error_log(__LINE__.' - Final missing is '.$final_missing,0);}
                    // the final excess area is the percentage of the initial polygon's size that is covered by the user's polygon outside of the initial polygon
                    $final_excess = round((((float)$poly_user_area-(float)$overlap)/(float)$poly_answer_area)*100);
                    if ($dbg_local>1) { error_log(__LINE__.' - Final excess is '.$final_excess,0);}
                }

                $destination_items= explode('@@', $answerDestination);
                $threadhold_total = $destination_items[0];
                $threadhold_items=explode(';',$threadhold_total);
                $threadhold1 = $threadhold_items[0]; // overlap
                $threadhold2 = $threadhold_items[1]; // excess
                $threadhold3 = $threadhold_items[2];	 //missing

                // echo $final_overlap.'  '.$threadhold1 .' - '. $final_missing.' '. $threadhold2 .' - '. $final_excess.'  '. $threadhold3;

                // if is delineation
                if ($answerId===1) {
                    //setting colors
                    if ($final_overlap >= $threadhold1) {
                        $overlap_color = true; //echo 'a';
                    }

                    if ($final_excess <= $threadhold2) {
                        $excess_color = true; //echo 'b';
                    }

                    if ($final_missing <= $threadhold3) {
                        $missing_color = true; //echo 'c';
                    }

                    // if pass
                    //if ($final_overlap>=$threadhold1 && $final_missing<=$threadhold2 && $final_excess<=$threadhold3) {
                    if ($final_overlap>=$threadhold1 && $final_missing<=$threadhold3 && $final_excess<=$threadhold2) {
                        $next=1; //go to the oars
                        $result_comment=get_lang('Acceptable');
                    } else {
                        $next=1; //Go to the oars. If $next =  0 we will show this message: "One (or more) area at risk has been hit" instead of the table resume with the results
                        $wrong_results = true;
                        $result_comment=get_lang('Unacceptable');
                        $special_comment = $comment=$answerDestination=$objAnswerTmp->selectComment(1);
                        $answerDestination=$objAnswerTmp->selectDestination(1);
                        $destination_items= explode('@@', $answerDestination);
                        $try_hotspot=$destination_items[1];
                        $lp_hotspot=$destination_items[2];
                        $select_question_hotspot=$destination_items[3];
                        $url_hotspot=$destination_items[4];
                         //echo 'show the feedback';
                    }
                } elseif($answerId>1) {
                    if ($objAnswerTmp->selectHotspotType($answerId) == 'noerror') {
                        if ($dbg_local>0) { error_log(__LINE__.' - answerId is of type noerror',0);}
                        //type no error shouldn't be treated
                        $next = 1;
                        continue;
                    }
                    if ($dbg_local>0) { error_log(__LINE__.' - answerId is >1 so we\'re probably in OAR',0);}
                    //check the intersection between the oar and the user
                    //echo 'user';	print_r($x_user_list);		print_r($y_user_list);
                    //echo 'official';print_r($x_list);print_r($y_list);
                    //$result = get_intersection_data($x_list,$y_list,$x_user_list,$y_user_list);

                    //$delineation_cord=$objAnswerTmp->selectHotspotCoordinates($answerId);
                    $delineation_cord=$objAnswerTmp->selectHotspotCoordinates($answerId); //getting the oars coordinates

                    $poly_answer 			= convert_coordinates($delineation_cord,'|');
                    $max_coord 				= poly_get_max($poly_user,$poly_answer); //getting max coordinates
                    $test = false;
                    // if ($answerId == 2 ){$test = true;} for test oars

                    if (empty($_GET['hotspot'])) { //no user response
                        $overlap = false;
                    } else {
                        //	poly_compile really works tested with gnuplot
                        $poly_user_compiled	  	= poly_compile($poly_user,$max_coord,$test);//$poly_user is already set when answerid = 1
                        $poly_answer_compiled 	= poly_compile($poly_answer,$max_coord,$test);
                        $overlap 			  	= poly_touch($poly_user_compiled, $poly_answer_compiled,$max_coord);
                    }

                    if ($overlap == false) {
                        //all good, no overlap
                        $next = 1;
                        continue;
                    } else {
                        if ($dbg_local>0) { error_log(__LINE__.' - Overlap is '.$overlap.': OAR hit',0);}

                        $organs_at_risk_hit++;
                        //show the feedback
                        $next=1;
                        $comment=$answerDestination=$objAnswerTmp->selectComment($answerId);
                        $answerDestination=$objAnswerTmp->selectDestination($answerId);
                        $destination_items= explode('@@', $answerDestination);
                        $try_hotspot=$destination_items[1];
                        $lp_hotspot=$destination_items[2];
                        $select_question_hotspot=$destination_items[3];
                        $url_hotspot=$destination_items[4];
                    }
                }
            } else {
                // the first delineation feedback
                if ($dbg_local>0) { error_log(__LINE__.' first',0);}
                //we send the error
            }
        }
	}

	if ($overlap_color) {
		$overlap_color='green';
    } else {
		$overlap_color='red';
    }
	if ($missing_color) {
		$missing_color='green';
    } else {
		$missing_color='red';
    }
	if ($excess_color) {
		$excess_color='green';
    } else {
		$excess_color='red';
    }

    if (!is_numeric($final_overlap)) {
    	$final_overlap = 0;
    }

    if (!is_numeric($final_missing)) {
    	$final_missing = 0;
    }
    if (!is_numeric($final_excess)) {
    	$final_excess = 0;
    }

    if ($final_excess>100) {
    	$final_excess = 100;
    }


	$table_resume = '<table class="data_table" >
	<tr class="row_odd" >
		<td></td>
		<td ><b>'.get_lang('Requirements').'</b></td>
		<td><b>'.get_lang('YourAnswer').'</b></td>
	</tr>

	<tr class="row_even">
		<td><b>'.get_lang('Overlap').'</b></td>
		<td>'.get_lang('Min').' '.$threadhold1.'</td>
		<td><div style="color:'.$overlap_color.'">'.(($final_overlap < 0)?0:intval($final_overlap)).'</div></td>
	</tr>

	<tr>
		<td><b>'.get_lang('Excess').'</b></td>
		<td>'.get_lang('Max').' '.$threadhold2.'</td>
		<td><div style="color:'.$excess_color.'">'.(($final_excess < 0)?0:intval($final_excess)).'</div></td>
	</tr>

	<tr class="row_even">
		<td><b>'.get_lang('Missing').'</b></td>
		<td>'.get_lang('Max').' '.$threadhold3.'</td>
		<td><div style="color:'.$missing_color.'">'.(($final_missing < 0)?0:intval($final_missing)).'</div></td>
	</tr>
	</table>';
}
$_SESSION['newquestionList'] = $newquestionList;

$links='';

if (isset($choice_value) && $choice_value == -1) {
    if ($answerType != HOT_SPOT_DELINEATION) {
        $links .= '<a href="#" onclick="self.parent.tb_remove();">'.get_lang('ChooseAnAnswer').'</a><br />';
    }
}

$destinationid = null;

if ($answerType != HOT_SPOT_DELINEATION) {
    if (!empty($destination)) {
        $item_list = explode('@@',$destination);
    	//print_R($item_list);
    	$try = $item_list[0];
    	$lp = $item_list[1];
    	$destinationid= $item_list[2];
    	$url=$item_list[3];
    }
	$table_resume='';
} else {
		$try = $try_hotspot;
		$lp = $lp_hotspot;
		$destinationid= $select_question_hotspot;
		$url=$url_hotspot;
	if ($organs_at_risk_hit==0 && $wrong_results==false ) {
		// no error = no oar and no wrong result for delineation
		//show if no error
		//echo 'no error';
		$comment= $answerComment = $objAnswerTmp->selectComment($nbrAnswers);
		$answerDestination		 = $objAnswerTmp->selectDestination($nbrAnswers);

		//we send the error
		$destination_items= explode('@@', $answerDestination);
		$try=$destination_items[1];
		$lp=$destination_items[2];
		$destinationid=$destination_items[3];
		$url=$destination_items[4];
		$exerciseResult[$questionid] = 1;
	} else {
		$exerciseResult[$questionid] = 0;
	}
}

// the link to retry the question
if (isset($try) && $try==1) {
	$num_value_array= (array_keys($questionList, $questionid));
	$links.= Display :: return_icon('reload.gif', '', array ('style' => 'padding-left:0px;padding-right:5px;')).'<a onclick="SendEx('.$num_value_array[0].');" href="#">'.get_lang('TryAgain').'</a><br /><br />';
}

// the link to theory (a learning path)
if (!empty($lp)) {
	$lp_url= api_get_path(WEB_CODE_PATH) . 'lp/lp_controller.php?'.api_get_cidreq().'&action=view&lp_id='.$lp;
	$list = new LearnpathList(api_get_user_id());
	$flat_list = $list->get_flat_list();
	$links.= Display :: return_icon('theory.gif', '', array ('style' => 'padding-left:0px;padding-right:5px;')).'<a target="_blank" href="'.$lp_url.'">'.get_lang('SeeTheory').'</a><br />';
}
$links.='<br />';

// the link to an external website or link
if (!empty($url)) {
	$links.= Display :: return_icon('link.gif', '', array ('style' => 'padding-left:0px;padding-right:5px;')).'<a target="_blank" href="'.$url.'">'.get_lang('VisitUrl').'</a><br /><br />';
}

// the link to finish the test
if ($destinationid==-1) {
	$links.= Display :: return_icon('finish.gif', '', array ('style' => 'width:22px; height:22px; padding-left:0px;padding-right:5px;')).'<a onclick="SendEx(-1);" href="#">'.get_lang('EndActivity').'</a><br /><br />';
} else {
	// the link to other question
	if (in_array($destinationid,$questionList)) {
		$objQuestionTmp = Question :: read($destinationid);
		$questionName=$objQuestionTmp->selectTitle();
		$num_value_array= (array_keys($questionList, $destinationid));
        $links .= Display:: return_icon(
                'quiz.png',
                '',
                array('style' => 'padding-left:0px;padding-right:5px;')
            ).'<a onclick="SendEx('.$num_value_array[0].');" href="#">'.get_lang(
                'GoToQuestion'
            ).' '.$num_value_array[0].'</a><br /><br />';
	}
}

echo '<script>
function SendEx(num) {
    if (num == -1) {
        self.parent.window.location.href = "exercise_result.php?take_session=1&exerciseId='.$exerciseId.'&num="+num+"&exerciseType='.$exerciseType.'&origin='.$origin.'&learnpath_item_id='.$learnpath_item_id.'&learnpath_id='.$learnpath_id.'";
        self.parent.tb_remove();
    } else {
        num -= 1;
        self.parent.window.location.href = "exercise_submit.php?tryagain=1&exerciseId='.$exerciseId.'&num="+num+"&exerciseType='.$exerciseType.'&origin='.$origin.'&learnpath_item_id='.$learnpath_item_id.'&learnpath_id='.$learnpath_id.'";
        self.parent.tb_remove();
    }
}
</script>';

if ($links!='') {
	/*echo '<div id="ModalContent" style="padding-bottom:30px;padding-top:10px;padding-left:20px;padding-right:20px;">
    <a onclick="self.parent.tb_remove();" href="#" style="float:right; margin-top:-10px;">'.api_ucfirst(get_lang('Close')).'</a>';*/
	echo '<h1><div style="color:#333;">'.get_lang('Feedback').'</div></h1>';

	if ($answerType == HOT_SPOT_DELINEATION) {
		if ($organs_at_risk_hit > 0) {
			//$message='<p>'.get_lang('YourDelineation').'</p>';
			//$message.=$table_resume;
			$message.='<br />'.get_lang('ResultIs').' <b>'.get_lang('Unacceptable').'</b><br />';
			//if ($wrong_results) { }
			$message.='<p style="color:#DC0A0A;"><b>'.get_lang('OARHit').'</b></p>';
			$message.='<p>'.$comment.'</p>';
		} else {
			$message='<p>'.get_lang('YourDelineation').'</p>';
			$message.=$table_resume;
			$message.='<br />'.get_lang('ResultIs').' <b>'.$result_comment.'</b><br />';
			$message.='<p>'.$comment.'</p>';
		}
		echo $message;
	} else {
		echo '<p>'.$comment.'</p>';
	}
	echo '<h3>'.$links.'</h3>';
	echo '</div>';

	$_SESSION['hot_spot_result']=$message;
	$_SESSION['hotspot_delineation_result'][$exerciseId][$questionid] = array($message, $exerciseResult[$questionid]);
	//reseting the exerciseResult variable
	Session::write('exerciseResult',$exerciseResult);

	//save this variables just in case the exercise loads an LP with other exercise
	$_SESSION['objExerciseExtra'.$exerciseId] 	 = $_SESSION['objExercise'];
	$_SESSION['exerciseResultExtra'.$exerciseId] = $_SESSION['exerciseResult'];
	$_SESSION['questionListExtra'.$exerciseId]	 = $_SESSION['questionList'];
} else {
	$questionNum++;
	echo '<script>
			self.parent.window.location.href = "exercise_submit.php?exerciseId='.$exerciseId.'&num='.$questionNum.'&exerciseType='.$exerciseType.'&origin='.$origin.'";
   			//self.parent.tb_remove();
 	 	</script>';
}

echo '</div>';