<?php
/*
    DOKEOS - elearning and course management software

    For a full list of contributors, see documentation/credits.html

    This program 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.
    See "documentation/licence.html" more details.

    Contact:
		Dokeos
		Rue des Palais 44 Paleizenstraat
		B-1030 Brussels - Belgium
		Tel. +32 (2) 211 34 56
*/


/**
*	Exercise list: This script shows the list of exercises for administrators and students.
*	@package dokeos.exercise
*	@author Olivier Brouckaert, original author
*	@author Denes Nagy, HotPotatoes integration
*	@author Wolfgang Schneider, code/html cleanup
* 	@version $Id: exercice.php 12048 2007-04-18 08:08:26Z elixir_julian $
*/


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

require_once('../inc/global.inc.php');
$this_section=SECTION_COURSES;
api_protect_course_script();

$show=(isset($_GET['show']) && $_GET['show'] == 'result')?'result':'test'; // moved down to fix bug: http://www.dokeos.com/forum/viewtopic.php?p=18609#18609

/*
-----------------------------------------------------------
	Libraries
-----------------------------------------------------------
*/
require_once('exercise.class.php');
require_once('question.class.php');
require_once('answer.class.php');
require_once(api_get_path(LIBRARY_PATH).'fileManage.lib.php');
require_once(api_get_path(LIBRARY_PATH).'fileUpload.lib.php');
require_once('hotpotatoes.lib.php');

/*
-----------------------------------------------------------
	Constants and variables
-----------------------------------------------------------
*/
$is_allowedToEdit = is_allowed_to_edit();

$TBL_USER          	    = Database::get_main_table(TABLE_MAIN_USER);
$TBL_DOCUMENT          	= Database::get_course_table(TABLE_DOCUMENT);
$TBL_ITEM_PROPERTY      = Database::get_course_table(TABLE_ITEM_PROPERTY);
$TBL_EXERCICE_QUESTION	= Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
$TBL_EXERCICES			= Database::get_course_table(TABLE_QUIZ_TEST);
$TBL_QUESTIONS			= Database::get_course_table(TABLE_QUIZ_QUESTION);
$TBL_TRACK_EXERCICES   	= $_configuration['statistics_database']."`.`track_e_exercices";
$TBL_TRACK_HOTPOTATOES  = $_configuration['statistics_database']."`.`track_e_hotpotatoes";
$TABLETRACK_ATTEMPT 	= $_configuration['statistics_database']."`.`track_e_attempt";

// document path
$documentPath= api_get_path(SYS_COURSE_PATH).$_course['path']."/document";
// picture path
$picturePath=$documentPath.'/images';
// audio path
$audioPath=$documentPath.'/audio';

// hotpotatoes
$uploadPath = "/HotPotatoes_files";
$exercicePath = $_SERVER['PHP_SELF'];
$exfile = explode('/',$exercicePath);
$exfile = strtolower($exfile[sizeof($exfile)-1]);
$exercicePath = substr($exercicePath,0,strpos($exercicePath,$exfile));
$exercicePath = $exercicePath."exercice.php";

// maximum number of exercises on a same page
$limitExPage=50;

// Clear the exercise session
if(isset($_SESSION['objExercise']))		{ api_session_unregister('objExercise');		}
if(isset($_SESSION['objQuestion']))		{ api_session_unregister('objQuestion');		}
if(isset($_SESSION['objAnswer']))		{ api_session_unregister('objAnswer');		}
if(isset($_SESSION['questionList']))	{ api_session_unregister('questionList');	}
if(isset($_SESSION['exerciseResult']))	{ api_session_unregister('exerciseResult');	}

//general POST/GET/SESSION/COOKIES parameters recovery
if ( empty ( $origin ) ) {
    $origin     = $_REQUEST['origin'];
}
if ( empty ($choice ) ) {
    $choice     = $_REQUEST['choice'];
}
if ( empty ( $hpchoice ) ) {
    $hpchoice   = $_REQUEST['hpchoice'];
}
if ( empty ($exerciseId ) ) {
    $exerciseId = mysql_real_escape_string($_REQUEST['exerciseId']);
}
if ( empty ( $file ) ) {
    $hpchoice   = mysql_real_escape_string($_REQUEST['file']);
}
$learnpath_id = mysql_real_escape_string($_REQUEST['learnpath_id']);
$learnpath_item_id = mysql_real_escape_string($_REQUEST['learnpath_item_id']);
$page = mysql_real_escape_string($_REQUEST['page']);

if($origin == 'learnpath'){
	$show = 'result';
}
$htmlHeadXtra[]='<style type="text/css">
<!--
a.invisible
{
	color: #999999;
}

a.invisible:visited
{
	color: #999999;
}

a.invisible:active
{
	color: #999999;
}

a.invisible:hover
{
	color: #999999;
}
-->
</style>';

if ($show=='result' && $_REQUEST['comments']=='update' && $is_allowedToEdit)
{
	$id  = $_GET['exeid'];
	$emailid = $_GET['emailid'];
	$test  = $_GET['test'];
	$from = $_SESSION[_user]['mail'];
	$from_name = $_SESSION[_user]['firstName']." ".$_SESSION[_user]['lastName'];
	$url = $_SESSION['checkDokeosURL'].'claroline/exercice/exercice.php?'.api_get_cidreq().'&show=result';

	foreach ($_POST as $key=>$v)
	{
		$keyexp = explode('_',$key);
		if ($keyexp[0] == "marks")
		{
			$sql = "select question from $TBL_QUESTIONS where id = '$keyexp[1]'";
			$result =api_sql_query($sql, __FILE__, __LINE__);
			$ques_name = mysql_result($result,0,"question");

			$query = "update `$TABLETRACK_ATTEMPT` set marks = '$v' where question_id = $keyexp[1] and exe_id=$id";
			api_sql_query($query, __FILE__, __LINE__);

			$qry = 'SELECT sum(marks) as tot
					FROM `'.$TABLETRACK_ATTEMPT.'` where exe_id = '.intval($id).'
					GROUP BY question_id';

			$res = api_sql_query($qry,__FILE__,__LINE__);
			$tot = mysql_result($res,0,'tot');

			$totquery = "update `$TBL_TRACK_EXERCICES` set exe_result = $tot where exe_Id=$id";
			api_sql_query($totquery, __FILE__, __LINE__);

		}
		else
		{
		  $query = "update `$TABLETRACK_ATTEMPT` set teacher_comment = '$v' where question_id = $keyexp[1] and exe_id = $id ";
		   api_sql_query($query, __FILE__, __LINE__);
		}

	}

	$qry = 'SELECT DISTINCT question_id, marks
			FROM `'.$TABLETRACK_ATTEMPT.'` where exe_id = '.intval($id).'
			GROUP BY question_id';

	$res = api_sql_query($qry,__FILE__,__LINE__);
	$tot = 0;
	while($row = mysql_fetch_assoc($res))
	{
		$tot += $row ['marks'];
	}

	$totquery = "update `$TBL_TRACK_EXERCICES` set exe_result = $tot where exe_Id=$id";

	api_sql_query($totquery, __FILE__, __LINE__);
$subject = "Examsheet viewed/corrected/commented by teacher";
$message = "<html>
<head>
<style type='text/css'>
<!--
.body{
font-family: Verdana, Arial, Helvetica, sans-serif;
font-weight: Normal;
color: #000000;
}
.style8 {font-family: Verdana, Arial, Helvetica, sans-serif; font-weight: bold; color: #006699; }
.style10 {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 12px;
	font-weight: bold;
}
.style16 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; }
-->
</style>
</head>
<body>
<DIV>
  <p>Dear Student, </p>
  <p class='style10'> Your following attempt has been viewed/commented/corrected by teacher </p>
  <table width='417'>
    <tr>
      <td width='229' valign='top' bgcolor='E5EDF8'>&nbsp;&nbsp;<span class='style10'>Question</span></td>
      <td width='469' valign='top' bgcolor='#F3F3F3'><span class='style16'>#ques_name#</span></td>

    </tr>
    <tr>
      <td width='229' valign='top' bgcolor='E5EDF8'>&nbsp;&nbsp;<span class='style10'>Test</span></td>
       <td width='469' valign='top' bgcolor='#F3F3F3'><span class='style16'>#test#</span></td>

    </tr>
  </table>
  <p>Click the link below to access   your account and view your commented Examsheet. <A href='#url#'>#url#</A><BR>
    <BR>
  Regards </p>
  </DIV>
  </body>
  </html>
";
$message = "<p>You attempt for the test #test# has been viewed/commented/corrected by the teacher. Click the link below to access  your account and view your Examsheet. <A href='#url#'>#url#</A></p>
<BR>";
$mess= str_replace("#test#",$test,$message);
//$message= str_replace("#ques_name#",$ques_name,$mess);
$message = str_replace("#url#",$url,$mess);
$mess = stripslashes($message);
$headers  = " MIME-Version: 1.0 \r\n";
$headers .= "User-Agent: Dokeos/1.6";
$headers .= "Content-Transfer-Encoding: 7bit";
$headers .= 'From: '.$from_name.' <'.$from.'>' . "\r\n";
$headers="From:$from_name\r\nReply-to: $to\r\nContent-type: text/html; charset=gb2312";
//mail($emailid, $subject, $mess,$headers);

if(in_array($origin, array('tracking_course','user_course'))){
	//Redirect to the reporting		
	header('location: ../mySpace/myStudents.php?origin='.$origin.'&student='.$_GET['student'].'&details=true&course='.$_GET['course']);
}

}

if($show!='result')
{
	$nameTools=get_lang('Exercices');
}
else
{
	if($is_allowedToEdit)
	{
		$nameTools=get_lang('StudentScore');
		$interbreadcrumb[]=array("url" => "exercice.php","name" => get_lang('Exercices'));
	}
	else
	{
		$nameTools=get_lang('YourScore');
		$interbreadcrumb[]=array("url" => "exercice.php","name" => get_lang('Exercices'));
	}
}


if ($origin != 'learnpath')
{
	//so we are not in learnpath tool
	Display::display_header($nameTools,"Exercise");
	if(isset($_GET['message']))
	{
		if (in_array($_GET['message'], array('ExerciseEdited')))
		{
			Display::display_confirmation_message(get_lang($_GET['message']));
		}
	}

}
else
{
	?> <link rel="stylesheet" type="text/css" href="<?php echo api_get_path(WEB_CODE_PATH); ?>css/default.css"/>

<?php
}

// used for stats
include_once(api_get_path(LIBRARY_PATH).'events.lib.inc.php');

event_access_tool(TOOL_QUIZ);

// need functions of statsutils lib to display previous exercices scores
include_once(api_get_path(LIBRARY_PATH).'statsUtils.lib.inc.php');


/*
-----------------------------------------------------------
	Introduction section
	(editable by course admins)
-----------------------------------------------------------
*/
//Display::display_introduction_section(TOOL_QUIZ);


// selects $limitExPage exercises at the same time
$from=$page*$limitExPage;
//	$sql="SELECT id,title,type,active FROM $TBL_EXERCICES ORDER BY title LIMIT $from,".($limitExPage+1);
//	$result=api_sql_query($sql,__FILE__,__LINE__);
$sql="SELECT count(id) FROM $TBL_EXERCICES";
$res = api_sql_query($sql,__FILE__,__LINE__);
list($nbrexerc) = mysql_fetch_row($res);

HotPotGCt($documentPath,1,$_user['user_id']);

// only for administrator

if($is_allowedToEdit)
{

	if(!empty($choice))
	{
		// construction of Exercise
		$objExerciseTmp=new Exercise();

		if($objExerciseTmp->read($exerciseId))
		{
			switch($choice)
			{
				case 'delete':	// deletes an exercise
								$objExerciseTmp->delete();
								Display::display_confirmation_message(get_lang('ExerciseDeleted'));
								break;
				case 'enable':  // enables an exercise
								$objExerciseTmp->enable();
								$objExerciseTmp->save();

								// "WHAT'S NEW" notification: update table item_property (previously last_tooledit)
								api_item_property_update($_course, TOOL_QUIZ, $exerciseId, "QuizAdded", $_user['user_id']);

								Display::display_confirmation_message(get_lang('VisibilityChanged'));

								break;
				case 'disable': // disables an exercise
								$objExerciseTmp->disable();
								$objExerciseTmp->save();
								Display::display_confirmation_message(get_lang('VisibilityChanged'));
								break;
			}
		}

		// destruction of Exercise
		unset($objExerciseTmp);
	}

	//$sql="SELECT id,title,type,active FROM $TBL_EXERCICES ORDER BY title LIMIT $from,".($limitExPage+1);
	//$result=api_sql_query($sql,__FILE__,__LINE__);


	if(!empty($hpchoice))
	{
		switch($hpchoice)
		{
				case 'delete':	// deletes an exercise
							$imgparams = array();
							$imgcount = 0;
							GetImgParams($file,$documentPath,$imgparams,$imgcount);
							$fld = GetFolderName($file);
							for($i=0;$i < $imgcount;$i++)
							{
									my_delete($documentPath.$uploadPath."/".$fld."/".$imgparams[$i]);
									update_db_info("delete", $uploadPath."/".$fld."/".$imgparams[$i]);
							}

							if ( my_delete($documentPath.$file))
							{
								update_db_info("delete", $file);
							}
							my_delete($documentPath.$uploadPath."/".$fld."/");
							break;
				case 'enable':  // enables an exercise
					$newVisibilityStatus = "1"; //"visible"
                    $query = "SELECT id FROM $TBL_DOCUMENT WHERE path='$file'";
                    $res = api_sql_query($query,__FILE__,__LINE__);
                    $row = Database::fetch_array($res, 'ASSOC');
                    api_item_property_update($_course, TOOL_DOCUMENT, $row['id'], 'visible', $_user['user_id']);
                    //$dialogBox = get_lang('ViMod');

							break;
				case 'disable': // disables an exercise
					$newVisibilityStatus = "0"; //"invisible"
                    $query = "SELECT id FROM $TBL_DOCUMENT WHERE path='$file'";
                    $res = api_sql_query($query,__FILE__,__LINE__);
                    $row = Database::fetch_array($res, 'ASSOC');
                    api_item_property_update($_course, TOOL_DOCUMENT, $row['id'], 'invisible', $_user['user_id']);
					#$query = "UPDATE $TBL_DOCUMENT SET visibility='$newVisibilityStatus' WHERE path=\"".$file."\""; //added by Toon
					#api_sql_query($query,__FILE__,__LINE__);
					//$dialogBox = get_lang('ViMod');

								break;
		}
	}

	if($show == 'test')
	{
		$sql="SELECT id,title,type,active,description FROM $TBL_EXERCICES WHERE active<>'-1' ORDER BY title LIMIT $from,".($limitExPage+1);
		$result=api_sql_query($sql,__FILE__,__LINE__);
	}
}
// only for students
elseif($show == 'test')
{
	$sql="SELECT id,title,type,description FROM $TBL_EXERCICES WHERE active='1' ORDER BY title LIMIT $from,".($limitExPage+1);
	$result=api_sql_query($sql,__FILE__,__LINE__);
}


if($show == 'test'){

	//error_log('Show == test',0);
	$nbrExercises=mysql_num_rows($result);

	echo "<table border=\"0\" align=\"center\" cellpadding=\"2\" cellspacing=\"2\" width=\"100%\">",
		"<tr>";

	if (($is_allowedToEdit) and ($origin != 'learnpath'))
	{
		//error_log('is_allowedToEdit and origin<> learnpath',0);
		echo "<td width=\"50%\" nowrap=\"nowrap\">",
			"<img src=\"../img/new_test.gif\" alt=\"new test\" align=\"absbottom\">&nbsp;<a href=\"exercise_admin.php\">".get_lang("NewEx")."</a>",

			//"<img src=\"../img/quiz_na.gif\" alt=\"new test\" valign=\"ABSMIDDLE\"><a href=\"question_pool.php\">".get_lang("QuestionPool")."</a> | ",
			//" | <img src=\"../img/jqz.jpg\" alt=\"HotPotatoes\" valign=\"ABSMIDDLE\">&nbsp;<a href=\"hotpotatoes.php\">".get_lang("ImportHotPotatoesQuiz")."</a>",
			"</td>",
			"<td width=\"50%\" align=\"right\">";
	}
	else
	{
		//error_log('!is_allowedToEdit or origin == learnpath ('.$origin.')',0);
		echo "<td align=\"right\">";
	}

	//get HotPotatoes files (active and inactive)
	$res = api_sql_query ("SELECT *
					FROM $TBL_DOCUMENT
					WHERE
					path LIKE '".$uploadPath."/%/%'",__FILE__,__LINE__);
	$nbrTests = Database::num_rows($res);
	$res = api_sql_query ("SELECT *
					FROM $TBL_DOCUMENT d, $TBL_ITEM_PROPERTY ip
					WHERE  d.id = ip.ref
					AND ip.tool = '".TOOL_DOCUMENT."'
					AND d.path LIKE '".$uploadPath."/%/%'
					AND ip.visibility='1'", __FILE__,__LINE__);
	$nbrActiveTests = Database::num_rows($res);
	//error_log('nbrActiveTests = '.$nbrActiveTests,0);


	if($is_allowedToEdit)
	{//if user is allowed to edit, also show hidden HP tests
		$nbrHpTests = $nbrTests;
	}else
	{
		$nbrHpTests = $nbrActiveTests;
	}
	$nbrNextTests = $nbrHpTests-(($page*$limitExPage));


	//show pages navigation link for previous page
	if($page)
	{
		echo "<a href=\"".$_SERVER['PHP_SELF']."?".api_get_cidreq()."&page=".($page-1)."\">&lt;&lt; ",get_lang("PreviousPage")."</a> | ";
	}
	elseif($nbrExercises+$nbrNextTests > $limitExPage)
	{
		echo "&lt;&lt; ",get_lang("PreviousPage")." | ";
	}

	//show pages navigation link for previous page
	if($nbrExercises+$nbrNextTests > $limitExPage)
	{
		echo "<a href=\"".$_SERVER['PHP_SELF']."?".api_get_cidreq()."&page=".($page+1)."\">&gt;&gt; ",get_lang("NextPage")."</a>";

	}
	elseif($page)
	{
		echo get_lang("NextPage") . " &gt;&gt;";
	}

	echo "</td>",
			"</tr>",
			"</table>";

?>
<table class="data_table">
  <?php
	if (($is_allowedToEdit) and ($origin != 'learnpath'))
	{
	?>
  <tr class="row_odd">
    <th colspan="2"><?php echo get_lang("ExerciseName");?></th>
     <th><?php echo get_lang("Description");?></th>
	 <th><?php echo get_lang("Modify");?></th>

  </tr>
  <?php
	}
  else
	{
	 ?> <tr bgcolor="#e6e6e6">
    <th><?php echo get_lang("ExerciseName");?></th>
     <th><?php echo get_lang("Description");?></th>
	 <th><?php echo get_lang("State");?></th>

  </tr>
	<?php }

	// show message if no HP test to show
	if(!($nbrExercises+$nbrHpTests) )
	{
	?>
  <tr>
    <td <?php if($is_allowedToEdit) echo 'colspan="4"'; ?>><?php echo get_lang("NoEx"); ?></td>
  </tr>
  <?php
	}

	$i=1;

	// while list exercises

	if ($origin != 'learnpath') {

		while($row=mysql_fetch_array($result))
		{

			//error_log($row[0],0);
			if($i%2==0) $s_class="row_odd"; else $s_class="row_even";
			echo "<tr class='$s_class'>\n";

			// prof only
			if($is_allowedToEdit)
			{
				?>
  <td width="27%" colspan="2"><table border="0" cellpadding="0" cellspacing="0" width="100%">
    <tr>
      <td width="30" align="left"><img src="../img/quiz.gif"></td>
      <td width="15" valign="left" align="center"><?php echo ($i+($page*$limitExPage)).'.'; ?></td>
      <?php $row['title']=api_parse_tex($row['title']); ?>
      <td>
      	<a href="exercice_submit.php?<?php echo api_get_cidreq()."&origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id"; ?>&exerciseId=<?php echo $row['id']; ?>" <?php if(!$row['active']) echo 'class="invisible"'; ?>><?php echo $row['title']; ?></a>
      	<a href="exercise_admin.php?modifyExercise=yes&exerciseId=<?php echo $row[id]; ?>"> <img src="../img/edit.gif" border="0" title="<?php echo htmlentities(get_lang('Modify'), ENT_NOQUOTES, 'gb2312'); ?>" alt="<?php echo htmlentities(get_lang('Modify'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
      </td>
    </tr>
  </table></td>
 <td width="8%" align="center"> <?php
 $exid = $row['id'];
 $sqlquery = "SELECT count(*) FROM $TBL_EXERCICE_QUESTION WHERE `exercice_id` = '$exid'";
 $sqlresult =mysql_query($sqlquery);
 $rowi = mysql_result($sqlresult,0);
 echo $rowi.' '.strtolower(get_lang('Questions')); ?> </td>
       <td width="12%" align="center"><a href="admin.php?exerciseId=<?php echo $row[id]; ?>"><img src="../img/wizard_small.gif" border="0" title="<?php echo htmlentities(get_lang('Build'), ENT_NOQUOTES, 'gb2312'); ?>" alt="<?php echo htmlentities(get_lang('Build'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <a href="exercice.php?choice=delete&exerciseId=<?php echo $row[id]; ?>" onclick="javascript:if(!confirm('<?php echo addslashes(htmlentities(get_lang('AreYouSureToDelete'), ENT_NOQUOTES, 'gb2312')); echo " ".$row['title']; echo "?"; ?>')) return false;"> <img src="../img/delete.gif" border="0" alt="<?php echo htmlentities(get_lang('Delete'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <?php
				// if active
				if($row['active'])
				{
					?>
      <a href="exercice.php?choice=disable&page=<?php echo $page; ?>&exerciseId=<?php echo $row['id']; ?>"> <img src="../img/visible.gif" border="0" alt="<?php echo htmlentities(get_lang('Deactivate'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <?php
				}
				// else if not active
				else
				{
					?>
      <a href="exercice.php?choice=enable&page=<?php echo $page; ?>&exerciseId=<?php echo $row['id']; ?>"> <img src="../img/invisible.gif" border="0" alt="<?php echo htmlentities(get_lang('Activate'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <?php
				}
				echo "</td></tr>\n";

			}
			// student only
			else
			{
				?>
      <td width="40%"><table border="0" cellpadding="0" cellspacing="0" width="100%">
          <tr>
            <td width="20" valign="top" align="right"><?php echo ($i+($page*$limitExPage)).'.'; ?></td>
            <td width="1">&nbsp;</td>
            <?php $row['title']=api_parse_tex($row['title']);?>
            <td><a href="exercice_submit.php?<?php echo api_get_cidreq()."&origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id"; ?>&exerciseId=<?php echo $row['id']; ?>"><?php echo $row['title']; ?></a></td>

			</tr>
    </table></td>
	 <td align='center'> <?php
 $exid = $row['id'];
 $sqlquery = "SELECT count(*) FROM $TBL_EXERCICE_QUESTION WHERE `exercice_id` = '$exid'";
 $sqlresult =mysql_query($sqlquery);
 $rowi = mysql_result($sqlresult,0);
 echo $rowi.' Question(s)'; ?> </td>

	<td align='center'><?php
		$eid = $row['id'];
	$uid= $_SESSION[_user][user_id];
	$qry = "select * from `".$TBL_TRACK_EXERCICES."` where exe_exo_id = $eid and exe_user_id = $uid";
	$qryres = api_sql_query($qry);
	$num = mysql_num_rows($qryres);
	$row = mysql_fetch_array($qryres);
	$percentage = ($row['exe_result']/$row['exe_weighting'])*100;
	if ($num>0)
	{
		echo get_lang('Attempted').' ('.get_lang('Score').':';
		printf("%1.2f\n",$percentage);
		echo " %)";
	}
	else
	{
		echo get_lang('NotAttempted');
	}
	?></td>
  </tr>
 
  <?php
			}

			// skips the last exercise, that is only used to know if we have or not to create a link "Next page"
			if($i == $limitExPage)
			{
				break;
			}

			$i++;
			
		}	// end while()

		$ind = $i;


		if (($from+$limitExPage-1)>$nbrexerc)
		{
			if($from>$nbrexerc)
			{
				$from = $from - $nbrexerc;
			  $to = $limitExPage;
			}
			else
			{
				$to = $limitExPage-($nbrexerc-$from);
				$from = 0;
			}
		}
		if($is_allowedToEdit)
		{
			$sql = "SELECT d.path as path, d.comment as comment, ip.visibility as visibility
				FROM $TBL_DOCUMENT d, $TBL_ITEM_PROPERTY ip
							WHERE   d.id = ip.ref AND ip.tool = '".TOOL_DOCUMENT."' AND
							 (d.path LIKE '%htm%' OR d.path LIKE '%html%')
							AND   d.path  LIKE '".$uploadPath."/%/%' LIMIT $from,$to"; // only .htm or .html files listed
			$result = api_sql_query ($sql,__FILE__,__LINE__);
			//error_log($sql,0);
		}
		else
		{
			$sql = "SELECT d.path as path, d.comment as comment, ip.visibility as visibility
				FROM $TBL_DOCUMENT d, $TBL_ITEM_PROPERTY ip
								WHERE d.id = ip.ref AND ip.tool = '".TOOL_DOCUMENT."' AND
								 (d.path LIKE '%htm%' OR d.path LIKE '%html%')
								AND   d.path  LIKE '".$uploadPath."/%/%' AND ip.visibility='1' LIMIT $from,$to";
			$result = api_sql_query($sql, __FILE__, __LINE__); // only .htm or .html files listed
			//error_log($sql,0);
		}
		//error_log(mysql_num_rows($result),0);
		while($row = Database::fetch_array($result, 'ASSOC'))
		{
			//error_log('hop',0);
			$attribute['path'      ][] = $row['path'      ];
			$attribute['visibility'][] = $row['visibility'];
			$attribute['comment'   ][] = $row['comment'   ];
		}
		$nbrActiveTests = 0;
		if(is_array($attribute['path']))
		{
			while(list($key,$path) = each($attribute['path']))
			{
				list($a,$vis)=each($attribute['visibility']);
				if (strcmp($vis,"1")==0)
				{ $active=1;}
				else
				{ $active=0;}
				echo "<tr>\n";

				$title = GetQuizName($path,$documentPath);
				if ($title =='')
				{
					$title = GetFileName($path);
				}
				// prof only
				if($is_allowedToEdit)
				{
					/************/
					?>
  <td width="27%"><table border="0" cellpadding="0" cellspacing="0" width="100%">
    <tr>
      <td width="20" align="right"><?php echo ($ind+($page*$limitExPage)).'.'; ?><!--<img src="../img/jqz.jpg" alt="HotPotatoes" />--></td>
	   <td width="1">&nbsp;</td>
           <td><a href="showinframes.php?file=<?php echo $path?>&cid=<?php echo $_course['official_code'];?>&uid=<?php echo $_user['user_id'];?>" <?php if(!$active) echo 'class="invisible"'; ?>><?php echo $title?></a></td>
    </tr>
  </table></td>
  <td>
 </td>
  <td></td>
      <td width="12%" align="center"><a href="adminhp.php?hotpotatoesName=<?php echo $path; ?>"> <img src="../img/edit.gif" border="0" alt="<?php echo htmlentities(get_lang('Modify'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
  <a href="<?php echo $exercicePath; ?>?hpchoice=delete&file=<?php echo $path; ?>" onclick="javascript:if(!confirm('<?php echo addslashes(htmlentities(get_lang('AreYouSure'), ENT_NOQUOTES, 'gb2312').$title."?"); ?>')) return false;"><img src="../img/delete.gif" border="0" alt="<?php echo htmlentities(get_lang('Delete'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <?php
					// if active
					if($active)
					{
						$nbrActiveTests = $nbrActiveTests + 1;
						?>
      <a href="<?php echo $exercicePath; ?>?hpchoice=disable&page=<?php echo $page; ?>&file=<?php echo $path; ?>"><img src="../img/visible.gif" border="0" alt="<?php echo htmlentities(get_lang('Deactivate'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <?php
					}
					// else if not active
					else
					{
						?>
    <a href="<?php echo $exercicePath; ?>?hpchoice=enable&page=<?php echo $page; ?>&file=<?php echo $path; ?>"><img src="../img/invisible.gif" border="0" alt="<?php echo htmlentities(get_lang('Activate'), ENT_NOQUOTES, 'gb2312'); ?>" /></a>
    <?php
					}
				/****************/
				?></td>
      <?php }
				// student only
				else
				{
					if ($active==1)
					{
						$nbrActiveTests = $nbrActiveTests + 1;
						?>
    <td width="40%"><table border="0" cellpadding="0" cellspacing="0" width="100%">

        <td width="20" align="right"><?php echo ($ind+($page*$limitExPage)).'.'; ?><!--<img src="../img/jqz.jpg" alt="HotPotatoes" />--></td>
       <td width="1">&nbsp;</td>
        <td><a href="showinframes.php?<?php echo api_get_cidreq()."&file=".$path."&cid=".$_course['official_code']."&uid=".$_user['user_id'].'"'; if(!$active) echo 'class="invisible"'; ?>"><?php echo $title;?></a></td>

     </tr>
    </table></td>
  </tr>
  <?php
					}
				}
				?>
  <?php
				if($ind == $limitExPage)
				{
					break;
				}
				if($is_allowedToEdit)
				{
					$ind++;
				}
				else
				{
					if ($active==1)
					{
						$ind++;
					}
				}echo "<tr><td colspan = '5'><hr></td></tr>";
			}
		}


	} //end if ($origin != 'learnpath') {
	?>
</table>
<?php
}else{
	if($origin != 'learnpath'){
		echo '<a href="'.api_add_url_param($_SERVER['REQUEST_URI'],'show=test').'">&lt;&lt; '.get_lang('Back').'</a>';
	}
}// end if($show == 'test')

/*****************************************/
/* Exercise Results (uses tracking tool) */
/*****************************************/

// if tracking is enabled
if($_configuration['tracking_enabled'])
{

	if($show == 'result'){
		
		?>

		<table class="data_table">
		 <tr class="row_odd">
		  <?php if($is_allowedToEdit): ?>
			<th><?php echo get_lang("User"); ?></th><?php endif; ?>
		  <th><?php echo get_lang("Exercice"); ?></th>
		  <th><?php echo get_lang("Date"); ?></th>
		  <th><?php echo get_lang("Result"); ?></th>
		  <th><?php echo $is_allowedToEdit?get_lang("CorrectTest"):get_lang("ViewTest"); ?></th>


		 </tr>

		<?php
		if($is_allowedToEdit)
		{
			//get all results (ourself and the others) as an admin should see them
			//AND exe_user_id <> $_user['user_id']  clause has been removed
			$sql="SELECT CONCAT(`lastname`,' ',`firstname`),`ce`.`title`, `te`.`exe_result` ,
						`te`.`exe_weighting`, UNIX_TIMESTAMP(`te`.`exe_date`),`te`.`exe_Id`,email
				  FROM $TBL_EXERCICES AS ce , `$TBL_TRACK_EXERCICES` AS te, $TBL_USER AS user
				  WHERE `te`.`exe_exo_id` = `ce`.`id` AND `user_id`=`te`.`exe_user_id` AND `te`.`exe_cours_id`='$_cid'
				  ORDER BY `te`.`exe_cours_id` ASC, `ce`.`title` ASC, `te`.`exe_date`ASC";

			$hpsql="SELECT CONCAT(tu.lastname,' ',tu.firstname), tth.exe_name,
						tth.exe_result , tth.exe_weighting, UNIX_TIMESTAMP(tth.exe_date)
					FROM `$TBL_TRACK_HOTPOTATOES` tth, $TBL_USER tu
					WHERE  tu.user_id=tth.exe_user_id AND tth.exe_cours_id = '".$_cid."'
					ORDER BY tth.exe_cours_id ASC, tth.exe_date ASC";

		}
		else
		{ // get only this user's results
			  $sql="SELECT '',`ce`.`title`, `te`.`exe_result` , `te`.`exe_weighting`, UNIX_TIMESTAMP(`te`.`exe_date`),`te`.`exe_Id`
				  FROM $TBL_EXERCICES AS ce , `$TBL_TRACK_EXERCICES` AS te
				  WHERE `te`.`exe_exo_id` = `ce`.`id` AND `te`.`exe_user_id`='".$_user['user_id']."' AND `te`.`exe_cours_id`='$_cid'
				  ORDER BY `te`.`exe_cours_id` ASC, `ce`.`title` ASC, `te`.`exe_date`ASC";

			$hpsql="SELECT '',exe_name, exe_result , exe_weighting, UNIX_TIMESTAMP(exe_date)
					FROM `$TBL_TRACK_HOTPOTATOES`
					WHERE exe_user_id = '".$_user['user_id']."' AND exe_cours_id = '".$_cid."'
					ORDER BY exe_cours_id ASC, exe_date ASC";

		}

		$results=getManyResultsXCol($sql,7);
		$hpresults=getManyResultsXCol($hpsql,5);

		$NoTestRes = 0;
		$NoHPTestRes = 0;

		if(is_array($results))
		{
			for($i = 0; $i < sizeof($results); $i++)
			{
				$id = $results[$i][5];
				$mailid = $results[$i][6];
		?>
		 <tr <?php if($i%2==0) echo 'class="row_odd"'; else echo 'class="row_even"'; ?>>
		  <?php if($is_allowedToEdit): ?>
			<td><?php $user = $results[$i][0]; echo $results[$i][0]; ?></td><?php endif; ?>
		  <td><?php $test = $results[$i][1]; echo $results[$i][1]; ?></td>
		  <td><?php $dt = strftime($dateTimeFormatLong,$results[$i][4]); echo strftime($dateTimeFormatLong,$results[$i][4]); ?></td>
		  <td><?php $res = $results[$i][2]; echo $results[$i][2]; ?> / <?php echo $results[$i][3]; ?></td>
		 <td><?php echo $is_allowedToEdit?"<a href='exercise_show.php?user=$user&dt=$dt&res=$res&id=$id&email=$mailid'>".get_lang("Edit")."</a>":"<a href='exercise_show.php?dt=$dt&res=$res&id=$id'>".get_lang('Show')."</a>"?></td>

		 </tr>

		<?php

			}
		}
		else
		{
				$NoTestRes = 1;
		}

		// The Result of Tests
		if(is_array($hpresults))
		{

			for($i = 0; $i < sizeof($hpresults); $i++)
			{
				$title = GetQuizName($hpresults[$i][1],$documentPath);
				if ($title =='')
				{
					$title = GetFileName($hpresults[$i][1]);
				}
		?>
		<tr>
		<?php if($is_allowedToEdit): ?>
			<td class="content"><?php echo $hpresults[$i][0]; ?></td><?php endif; ?>
		  <td class="content"><?php echo $title; ?></td>
		  <td class="content" align="center"><?php echo strftime($dateTimeFormatLong,$hpresults[$i][4]); ?></td>
		  <td class="content" align="center"><?php echo $hpresults[$i][2]; ?> / <?php echo $hpresults[$i][3]; ?></td>
		</tr>

		<?php
			}
		}
		else
		{
			$NoHPTestRes = 1;
		}



		if ($NoTestRes==1 && $NoHPTestRes==1)
		{
		?>

		 <tr>
		  <td colspan="3"><?php echo get_lang("NoResult"); ?></td>
		 </tr>

		<?php
		}

		?>

		</table>

		<?php
	}else{

		echo '<p><img src="'.api_get_path(WEB_IMG_PATH).'show_test_results.gif" align="absbottom">&nbsp;<a href="'.api_add_url_param($_SERVER['REQUEST_URI'],'show=result').'">'.get_lang("Results").' &gt;&gt;</a></p>';

	}// end if($show == 'result')

}// end if tracking is enabled

if ($origin != 'learnpath') { //so we are not in learnpath tool
	Display::display_footer();
} else {
	?>
	<link rel="stylesheet" type="text/css" href="<?php echo $clarolineRepositoryWeb ?>css/default.css" />
	<?php
}
?>