chamilo-lms/main/exercice/exercise_show.php

<?php
/**
 * @todo remove the debug code and use the general debug library
 * @todo use the Database:: functions
 * @todo small letters for table variables
 */
include('exercise.class.php');
include('question.class.php');
include('answer.class.php');

// answer types
define('UNIQUE_ANSWER',	1);
define('MULTIPLE_ANSWER',	2);
define('FILL_IN_BLANKS',	3);
define('MATCHING',		4);
define('FREE_ANSWER', 5);
define('HOTSPOT', 6);

// name of the language file that needs to be included 
$language_file='exercice';

include('../inc/global.inc.php');

$this_section=SECTION_COURSES;
api_protect_course_script();
include(api_get_path(LIBRARY_PATH).'text.lib.php');
include_once(api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');

// Database table definitions
$TBL_EXERCICE_QUESTION 	= $_course['dbNameGlu'].'quiz_rel_question';
$TBL_EXERCICES         	= $_course['dbNameGlu'].'quiz';
$TBL_QUESTIONS         	= $_course['dbNameGlu'].'quiz_question';
$TBL_REPONSES          	= $_course['dbNameGlu'].'quiz_answer';
$main_user_table 		= Database :: get_main_table(TABLE_MAIN_USER);
$main_course_user_table = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
$TABLETRACK_ATTEMPT 	= $_configuration['statistics_database']."`.`track_e_attempt"; 
$TABLETRACK_EXERCICES 	= $_configuration['statistics_database']."`.`track_e_exercices";

$dsp_percent = false; 
$debug=0;
if($debug>0)
{
	echo str_repeat('&nbsp;',0).'Entered exercise_result.php'."<br />\n";var_dump($_POST);
}
// general parameters passed via POST/GET
if ( empty ( $origin ) ) 
{
    $origin = $_REQUEST['origin'];
}
if ( empty ( $learnpath_id ) ) {
    $learnpath_id       = mysql_real_escape_string($_REQUEST['learnpath_id']);
}
if ( empty ( $learnpath_item_id ) ) {
    $learnpath_item_id  = mysql_real_escape_string($_REQUEST['learnpath_item_id']);
}
if ( empty ( $formSent ) ) {
    $formSent= $_REQUEST['formSent'];
}
if ( empty ( $exerciseResult ) ) {
    $exerciseResult = $_SESSION['exerciseResult'];
}
if ( empty ( $questionId ) ) {
    $questionId = $_REQUEST['questionId'];
}
if ( empty ( $choice ) ) {
    $choice = $_REQUEST['choice'];
}
if ( empty ( $questionNum ) ) {
    $questionNum    = mysql_real_escape_string($_REQUEST['questionNum']);
} 
if ( empty ( $nbrQuestions ) ) {
    $nbrQuestions   = mysql_real_escape_string($_REQUEST['nbrQuestions']);
}
if ( empty ( $questionList ) ) {
    $questionList = $_SESSION['questionList'];
}
if ( empty ( $objExercise ) ) {
    $objExercise = $_SESSION['objExercise'];
}
$is_allowedToEdit=$is_courseAdmin;	
$nameTools=get_lang('Exercice');

$interbreadcrumb[]=array("url" => "exercice.php","name" => get_lang('Exercices'));

Display::display_header($nameTools,"Exercise");
//echo "<pre>";
//print_r($_SESSION);
//echo "</pre>";
$emailId = $_REQUEST['email'];
$user_name = $_REQUEST['user'];
$test 	   = $_REQUEST['test'];
$dt	 	   = $_REQUEST['dt'];
$marks 	   = $_REQUEST['res'];
$id 	   = $_REQUEST['id'];
?>
<style type="text/css">
<!--
#comments {
	position:absolute;
	left:795px;
	top:0px;
	width:200px;
	height:75px;
	z-index:1;
}

-->
</style>
<script language="javascript">
function showfck(sid,marksid)
{
document.getElementById(sid).style.visibility='visible';
document.getElementById(marksid).style.visibility='visible';
}

function getFCK(vals,marksid){
  var f=document.getElementById('myform');

  var m_id = marksid.split(',');
  for(var i=0;i<m_id.length;i++){ 
  var oHidn = document.createElement("input");
			oHidn.type = "hidden";
			var selname = oHidn.name = "marks_"+m_id[i];
			var selid = document.forms['marksform_'+m_id[i]].marks.selectedIndex;			
			oHidn.value = document.forms['marksform_'+m_id[i]].marks.options[selid].text;
			f.appendChild(oHidn);
	}  

	var ids = vals.split(',');
	for(var k=0;k<ids.length;k++){  
			var oHidden = document.createElement("input");
			oHidden.type = "hidden";
			oHidden.name = "comments_"+ids[k];
			oEditor = FCKeditorAPI.GetInstance(oHidden.name) ;
			oHidden.value = oEditor.GetXHTML(true);
			f.appendChild(oHidden);  
	}
//f.submit();
}
</script>
<?php
		
//functions
function get_comments($id,$question_id)
	{
	global $TABLETRACK_ATTEMPT;				
	$sql = "select teacher_comment from `".$TABLETRACK_ATTEMPT."` where exe_id=$id and question_id = '$question_id' order by question_id";
	$sqlres = api_sql_query($sql, __FILE__, __LINE__);
	$comm = mysql_result($sqlres,0,"teacher_comment");
	return $comm;
	}
function display_unique_or_multiple_answer($answerType, $studentChoice, $answer, $answerComment, $answerCorrect,$id,$questionId,$ans)
{
	?>
	<tr valign="top">
	<td width="5%" align="center">
		<img src="../img/<?php echo ($answerType == UNIQUE_ANSWER)?'radio':'checkbox'; echo $studentChoice?'_on':'_off'; ?>.gif"
		border="0" alt="" />
	</td>
	<td width="5%" align="center">
		<img src="../img/<?php echo ($answerType == UNIQUE_ANSWER)?'radio':'checkbox'; echo $answerCorrect?'_on':'_off'; ?>.gif"
		border="0" alt=" " />
	</td>
	<td width="45%">
		<?php
		$answer=api_parse_tex($answer);
		echo $answer; ?><hr  style="border-top: 0.5px solid #4171B5;">
	</td>
	<?php if($ans==1)
	{$comm = get_comments($id,$questionId);
	//echo $comm;
	}?>
	</tr>
	<?php
}
function display_fill_in_blanks_answer($answer,$id,$questionId)
{
	
	?>					
		<tr>
		<td>
			<?php echo nl2br($answer); ?>
		</td><?php 
		if(!$is_allowedToEdit) {?>
		<td>
		<?php 
		$comm = get_comments($id,$questionId);
		//echo $comm;
		?>
		</td>
		</tr>					
	<?php }
}

function display_free_answer($answer,$id,$questionId)
{
	?>					
		<tr>
		<td>
			<?php echo nl2br(stripslashes($answer)); ?>
		</td> <?php if(!$is_allowedToEdit) {?>
   <td>
    <?php 
	
	$comm = get_comments($id,$questionId);
	/*if ($comm!='')
	echo $comm;
	else
	echo  get_lang('notCorrectedYet');
	*/?>
	
   </td> <?php }?>		
		</tr>			
	<?php
}


/*
==============================================================================
		MAIN CODE
==============================================================================
*/

?>
<table width="100%" border="0" cellspacing=0 cellpadding=0>
  <tr>
    <td colspan="2">
	<?php $exerciseTitle=api_parse_tex($test);
$query = "select * from `".$TABLETRACK_ATTEMPT."` where exe_id='$id' group by question_id";
$result =api_sql_query($query, __FILE__, __LINE__);
?>	
	<h3><?php echo $test ?>: <?php echo get_lang("Result"); ?></h3>
	
	 </td>
  </tr>
  <?php 


	$i=$totalScore=$totalWeighting=0;
 if($debug>0){echo "ExerciseResult: "; var_dump($exerciseResult); echo "QuestionList: ";var_dump($questionList);}

	// for each question
	$questionList = array();
	$exerciseResult = array();
	$k=0;
	while ($row = mysql_fetch_array($result))
			{
			$questionList[] = $row['question_id'];
			$exerciseResult[] = $row['answer'];
			}
		foreach($questionList as $questionId)
			{
				$k++;
				$choice=$exerciseResult[$questionId];
				// creates a temporary Question object
				$objQuestionTmp=new Question();
				$objQuestionTmp->read($questionId);
				$questionName=$objQuestionTmp->selectTitle();
				$questionWeighting=$objQuestionTmp->selectWeighting();
				$answerType=$objQuestionTmp->selectType();
				$quesId =$objQuestionTmp->selectId(); //added by priya saini
				
				// destruction of the Question object
					unset($objQuestionTmp);

				

				if($answerType == UNIQUE_ANSWER || $answerType == MULTIPLE_ANSWER)
				{
					$colspan=2;
				}
				if($answerType == MATCHING || $answerType == FREE_ANSWER)
				{
					$colspan=2;
				}
				else
				{
					$colspan=2;
				}?>

  <tr bgcolor="#E6E6E6">
    <td colspan="2" > <?php echo get_lang("Question").' '.($i+1); ?> </td>
  </tr>
  <tr>
    <td colspan="2"><?php echo $questionName; ?> </td>
  </tr>
  <tr>
  <td width="200" height="90" valign="top">
  <?php
		if($answerType == MULTIPLE_ANSWER)
		{?>
			<table width="355" border="0" cellspacing="3" cellpadding="3">
			<tr>
			<td>&nbsp;</td>
			</tr>
			<tr>
			<td><i><?php echo get_lang("Choice"); ?></i> </td>
			<td><i><?php echo get_lang("ExpectedChoice"); ?></i></td>
			<td><i><?php echo get_lang("Answer"); ?></i></td>
			</tr>
			<tr>
			<td>&nbsp;</td>
			</tr>
			<?php
			// construction of the Answer object
				$objAnswerTmp=new Answer($questionId);
				$nbrAnswers=$objAnswerTmp->selectNbrAnswers();
				$questionScore=0; 
				for($answerId=1;$answerId <= $nbrAnswers;$answerId++)
					{
						$answer=$objAnswerTmp->selectAnswer($answerId);
						$answerComment=$objAnswerTmp->selectComment($answerId);
						$answerCorrect=$objAnswerTmp->isCorrect($answerId);
						$answerWeighting=$objAnswerTmp->selectWeighting($answerId);
						$queryans = "select * from `".$TABLETRACK_ATTEMPT."` where exe_id = $id and question_id= $questionId";
						$resultans = api_sql_query($queryans, __FILE__, __LINE__);
						while ($row = mysql_fetch_array($resultans))
								{
								$ind = $row['answer'];
								$choice[$ind] = 1;
								}
						$studentChoice=$choice[$answerId];
						if($studentChoice)
							{
							$questionScore+=$answerWeighting;
							$totalScore+=$answerWeighting;
							}
					
				?>
			<tr>
			<td> <?php 
			if($answerId==1)
					display_unique_or_multiple_answer($answerType, $studentChoice, $answer, $answerComment, $answerCorrect,$id,$questionId,$answerId);
			else
					display_unique_or_multiple_answer($answerType, $studentChoice, $answer, $answerComment, $answerCorrect,$id,$questionId,"");
				?>
			</td>
			</tr>
			<?php 
		$i++;
		 }?>
			</table>
	<?php }
		else if ($answerType == UNIQUE_ANSWER)
		{?>
		<table width="355" border="0">
			<tr>
			<td>&nbsp;</td>
			</tr>
			<tr>
			<td><i><?php echo get_lang("Choice"); ?></i> </td>
			<td><i><?php echo get_lang("ExpectedChoice"); ?></i></td>
			<td><i><?php echo get_lang("Answer"); ?></i></td>
			</tr>
			<tr>
			<td>&nbsp;</td>
			</tr>
			<?php 
			$objAnswerTmp=new Answer($questionId);
			$nbrAnswers=$objAnswerTmp->selectNbrAnswers();
			$questionScore=0;
			for($answerId=1;$answerId <= $nbrAnswers;$answerId++)
				{
				$answer=$objAnswerTmp->selectAnswer($answerId);
				$answerComment=$objAnswerTmp->selectComment($answerId);
				$answerCorrect=$objAnswerTmp->isCorrect($answerId);
				$answerWeighting=$objAnswerTmp->selectWeighting($answerId);
				$queryans = "select answer from `".$TABLETRACK_ATTEMPT."` where exe_id = $id and question_id= $questionId";
				$resultans = api_sql_query($queryans, __FILE__, __LINE__);
				$choice = mysql_result($resultans,0,"answer");
				$studentChoice=($choice == $answerId)?1:0;
				if($studentChoice)
					{
				  	$questionScore+=$answerWeighting;
					$totalScore+=$answerWeighting;
					}?>

			<tr>
			<td><?php if($answerId==1)
				display_unique_or_multiple_answer($answerType, $studentChoice, $answer, $answerComment, $answerCorrect,$id,$questionId,$answerId);
				else
				display_unique_or_multiple_answer($answerType, $studentChoice, $answer, $answerComment, $answerCorrect,$id,$questionId,"");
				 ?>
			</td>
			</tr><?php
		$i++;

		
		}?>
			</table>
	<?php  }
		elseif($answerType == FILL_IN_BLANKS)
		{?>
			<table width="355" border="0">
			<tr>
			<td>&nbsp;</td>
			</tr>
			<tr>
			<td><i><?php echo get_lang("Answer"); ?></i> </td>
			</tr>
			<tr>
			<td>&nbsp;</td>
			</tr>
			<?php 
			$objAnswerTmp=new Answer($questionId);
			$nbrAnswers=$objAnswerTmp->selectNbrAnswers();
			$questionScore=0;
			for($answerId=1;$answerId <= $nbrAnswers;$answerId++)
				{
				$answer=$objAnswerTmp->selectAnswer($answerId);
				$answerComment=$objAnswerTmp->selectComment($answerId);
				$answerCorrect=$objAnswerTmp->isCorrect($answerId);
				$answerWeighting=$objAnswerTmp->selectWeighting($answerId);
				list($answer,$answerWeighting)=explode('::',$answer);
				// splits weightings that are joined with a comma
				$answerWeighting=explode(',',$answerWeighting);
				// we save the answer because it will be modified
			    $temp=$answer;
				// TeX parsing
				// 1. find everything between the [tex] and [/tex] tags
				$startlocations=strpos($temp,'[tex]');
				$endlocations=strpos($temp,'[/tex]');
				if($startlocations !== false && $endlocations !== false)
					{
					$texstring=substr($temp,$startlocations,$endlocations-$startlocations+6);
					// 2. replace this by {texcode}
					$temp=str_replace($texstring,'{texcode}',$temp);
					}
				$j=0;
				// the loop will stop at the end of the text
				$i=0;
				while(1)
					{ 
					// quits the loop if there are no more blanks
					if(($pos = strpos($temp,'[')) === false)
						{
						// adds the end of the text
						 $answer.=$temp;
						// TeX parsing
						$texstring = api_parse_tex($texstring);
						break;
						}
				    $temp=substr($temp,$pos+1);
				// quits the loop if there are no more blanks
					if(($pos = strpos($temp,']')) === false)
						{
							break;
						}
					$queryfill = "select answer from `".$TABLETRACK_ATTEMPT."` where exe_id = $id and question_id= $questionId";
					$resfill = api_sql_query($queryfill, __FILE__, __LINE__);
					$str=mysql_result($resfill,0,"answer");
					preg_match_all ('#\[([^[/]*)/#', $str, $arr);
					$choice = $arr[1];
					$choice[$j]=trim($choice[$j]);
				// if the word entered by the student IS the same as the one defined by the professor
					if(strtolower(substr($temp,0,$pos)) == stripslashes(strtolower($choice[$j])))
						{
					// gives the related weighting to the student
						$questionScore+=$answerWeighting[$j];
						// increments total score
						$totalScore+=$answerWeighting[$j];
						}
					// else if the word entered by the student IS NOT the same as the one defined by the professor
					$j++;
					$temp=substr($temp,$pos+1);
					$i=$i+1;
				} $answer = $str;
?>
			<tr>
			<td> <?php display_fill_in_blanks_answer($answer,$id,$questionId); ?> </td>
			</tr><?php 
		$i++;

	
		}?>
			</table>
	<?php  }
		elseif($answerType == FREE_ANSWER)
		{?>
			<table width="355" border="0" cellspacing="0" cellpadding="0">
			<tr>
			<td>&nbsp;</td>
			</tr>
			<tr>
			<td><i><?php echo get_lang("Answer"); ?></i> </td>
			</tr>
			<tr>
			<td>&nbsp;</td>
			</tr>

			<?php 
			$objAnswerTmp=new Answer($questionId);
			$nbrAnswers=$objAnswerTmp->selectNbrAnswers();
			$questionScore=0;
			for($answerId=1;$answerId <= $nbrAnswers;$answerId++)
				{
				$answer=$objAnswerTmp->selectAnswer($answerId);
				$answerComment=$objAnswerTmp->selectComment($answerId);
				$answerCorrect=$objAnswerTmp->isCorrect($answerId);
				$answerWeighting=$objAnswerTmp->selectWeighting($answerId);
				$queryfree = "select marks from `".$TABLETRACK_ATTEMPT."` where exe_id = $id and question_id= $questionId";
				$resfree = api_sql_query($queryfree, __FILE__, __LINE__);
				$questionScore= mysql_result($resfree,0,"marks");
				//to assign marks to open question
				$totalScore+=$questionScore;
				$query = "select answer from `".$TABLETRACK_ATTEMPT."` where exe_id = $id and question_id= $questionId";
				$resq=api_sql_query($query);
				$choice = mysql_result($resq,0,"answer");
				?>	
			<tr>
			<td valign="top"><?php display_free_answer($choice,$id,$questionId);?> </td>
			</tr><?php 
		$i++;

		
		 }?>
			</table>
	<?php  }
		elseif($answerType == MATCHING)
			{?>
		<table width="355" height="71" border="0">
			<tr>
			<td>&nbsp;</td>
			</tr>
			<tr>
			<td><i><?php echo get_lang("ElementList"); ?></i> </td>
			<td><i><?php echo get_lang("CorrespondsTo"); ?></i></td>
			
			</tr>
			<tr>
			<td>&nbsp;</td>
			</tr>
			<?php 
			$objAnswerTmp=new Answer($questionId);
			$nbrAnswers=$objAnswerTmp->selectNbrAnswers();
			$questionScore=0;
			for($answerId=1;$answerId <= $nbrAnswers;$answerId++)
				{
				$answer=$objAnswerTmp->selectAnswer($answerId);
				$answerComment=$objAnswerTmp->selectComment($answerId);
				$answerCorrect=$objAnswerTmp->isCorrect($answerId);
				$answerWeighting=$objAnswerTmp->selectWeighting($answerId);
				$querymatch = "select * from `".$TABLETRACK_ATTEMPT."` where exe_id = $id and question_id= $questionId";
				$resmatch = api_sql_query($querymatch, __FILE__, __LINE__);
				while ($row = mysql_fetch_array($resmatch))
					{
					$ind = $row['position'];
					$answ = $row['answer'];
					$choice[$ind] = $answ;
					}
					
				 if($answerCorrect)
				{
					if($answerCorrect == $choice[$answerId])
					{
						$questionScore+=$answerWeighting;
						$totalScore+=$answerWeighting;
						$choice[$answerId]=$matching[$choice[$answerId]];
					}
					elseif(!$choice[$answerId])
					{
						$choice[$answerId]='&nbsp;&nbsp;&nbsp;';
					}
					else
					{
						$choice[$answerId]='<font color="red"><s>'.$matching[$choice[$answerId]].'</s></font>';
					}
				}
				else
				{
					$matching[$answerId]=$answer;
				}
				 ?>
			<tr>
			
			
							  <?php
								$answer=api_parse_tex($answer);
								//echo $answer; ?>
						     
							  <?php 
						$query = "select position from `".$TABLETRACK_ATTEMPT."` where question_id = $questionId and exe_id=$id";
						$resapp = api_sql_query($query, __FILE__, __LINE__);
						while($row = mysql_fetch_array($resapp))
							{
							 $tp = $row['position'];
						     }											
						foreach($choice as $key => $v)
							{
							if($key==$answerId)
								{
                                 echo "<td>".$answer."</td>";
								 echo "<td>";
								 echo $v.'/';
								
								}								
							}
									
							?>  <font color="green"><b>
							<?php
							 $matching[$answerCorrect]=api_parse_tex($matching[$answerCorrect]);
							 echo $matching[$answerCorrect]; ?></b></font>
			</td>
			
			</tr><?php 
		$i++;

		
		}?>
			</table>
	<?php }?>


		 </td>
		<td width="346" valign = "top"><i>
		<?php echo get_lang("Comment"); ?></i>
			 <?php if($is_allowedToEdit) 
					 		{
							//if (isset($_REQUEST['showdiv']) && $questionId==$_REQUEST['ques_id'])
								//{
								$name = "fckdiv".$questionId;
								$marksname = "marksName".$questionId;
								?>
								<a href="#" onclick="showfck('<?php echo $name; ?>','<?php echo $marksname; ?>');"><?php if ($answerType == FREE_ANSWER) echo "&nbsp;".get_lang('EditCommentsAndMarks'); else echo "&nbsp;".get_lang('AddComments');?></a>
								<?php
								$comnt = get_comments($id,$questionId);
								echo "<br> <br>".$comnt;
								?>
								<div id="<?php echo $name; ?>" style="visibility:hidden">
								<?php
								$arrid[] = $questionId;
								$fck_attribute['Width'] = '400';
								$fck_attribute['Height'] = '150';
								$fck_attribute['ToolbarSet'] = 'Comment';
								$$questionId = new FormValidator('frmcomments'.$questionId,'post','');													
								$renderer =& $$questionId->defaultRenderer();
								$renderer->setFormTemplate(
	'<form{attributes}><div align="left">{content}</div></form>');

								$renderer->setElementTemplate(
	'<div align="left">{element}</div>'
);
								$comnt =get_comments($id,$questionId);
								${user.$questionId}['comments_'.$questionId] = $comnt;
								$$questionId->addElement('html_editor','comments_'.$questionId,false);
								//$$questionId->addElement('submit','submitQuestion',get_lang('Ok'));
								$$questionId->setDefaults(${user.$questionId});
								$$questionId->display();
								?>	
								</div>
							<?php
							
							
								}
							else
								{
							
							$comnt = get_comments($id,$questionId);
							echo "<br> <br>".$comnt;
								}
					?>  

		 </td>
	</tr>	
  <tr>
  <td></td>
  <td align= "left" >

  <?php
				 if($is_allowedToEdit)
						{
							if ($answerType == FREE_ANSWER)
								{
								$marksname = "marksName".$questionId;
								?>
							 <div id="<?php echo $marksname; ?>" style="visibility:hidden">
							 <form name="marksform_<?php echo $questionId; ?>" method="post" action="">
														 
								  
								  <?php 
								  $arrmarks[] = $questionId;
								 echo "Assign Marks ";
								  echo "<select name='marks' id='marks'>";
								  for($i=0;$i<=$questionWeighting;$i++)
									{?>
									<option <?php if ($i==$questionScore) echo "selected='selected'";?>>
										<?php echo $i;
											?></option>
    									<?php } ?>
								  </select>
								  </form></div><?php 
								 }
						}?>
				
  </td><tr><td></td><td align="right"><b><?php echo get_lang('Score')." : $questionScore/$questionWeighting"; ?></b></td>
  </tr>
	<?php  unset($objAnswerTmp);
		$i++;
$totalWeighting+=$questionWeighting;
		}
?>
<tr><td></td><td align=right><b><?php 
			$query = "update `".$TABLETRACK_EXERCICES."` set exe_result = $totalScore where exe_id = '$id'";
			api_sql_query($query,__FILE__,__LINE__);
			echo get_lang('YourTotalScore')." ";
			if($dsp_percent == true)
				{
			  	echo number_format(($totalScore/$totalWeighting)*100,1,'.','')."%";
				}
			else
				{
			  echo $totalScore."/".$totalWeighting;
				}
                  ?> !</b>
	</td></tr>
	<tr><td></td>
		<td align="right">
		<br />
		<?php $strids = implode(",",$arrid);
			$marksid = implode(",",$arrmarks);
			if($is_allowedToEdit)
			{
		?>
			
			 <form name="myform" id="myform" action="exercice.php?show=result&comments=update&exeid=<?php echo $id; ?>&test=<?php echo $test; ?>&emailid=<?php echo $emailId;?>" method="post">
			 <input type="submit" value="<?php echo get_lang('Ok'); ?>" onclick="getFCK('<?php echo $strids; ?>','<?php echo $marksid; ?>');"/> 
			 </form>
		<?php } ?>
		</td>
		</tr>
</table>