<?php
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2004 Dokeos S.A.
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)
	Copyright (c) Olivier Brouckaert

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	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 the GNU General Public License for more details.

	Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
==============================================================================
*/
/**
==============================================================================
*	@package dokeos.admin
==============================================================================
*/

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

// resetting the course id
$cidReset=true;

// including some necessary dokeos files
require('../inc/global.inc.php');

require_once ('../inc/lib/xajax/xajax.inc.php');
$xajax = new xajax();
//$xajax->debugOn();
$xajax -> registerFunction ('search_users');

// setting the section (for the tabs)
$this_section = SECTION_PLATFORM_ADMIN;

// Access restrictions
api_protect_admin_script(true);

// setting breadcrumbs
$interbreadcrumb[]=array('url' => 'index.php',"name" => get_lang('PlatformAdmin'));
$interbreadcrumb[]=array('url' => "session_list.php","name" => "Liste des sessions");

// Database Table Definitions
$tbl_session						= Database::get_main_table(TABLE_MAIN_SESSION);
$tbl_session_rel_class				= Database::get_main_table(TABLE_MAIN_SESSION_CLASS);
$tbl_session_rel_course				= Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
$tbl_session_rel_course_rel_user	= Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
$tbl_course							= Database::get_main_table(TABLE_MAIN_COURSE);
$tbl_user							= Database::get_main_table(TABLE_MAIN_USER);
$tbl_session_rel_user				= Database::get_main_table(TABLE_MAIN_SESSION_USER);
$tbl_class							= Database::get_main_table(TABLE_MAIN_CLASS);
$tbl_class_user						= Database::get_main_table(TABLE_MAIN_CLASS_USER);

// setting the name of the tool
$tool_name=get_lang('SubscribeUsersToSession');

$id_session=intval($_GET['id_session']);

if(!api_is_platform_admin())
{
	$sql = 'SELECT session_admin_id FROM '.Database :: get_main_table(TABLE_MAIN_SESSION).' WHERE id='.$id_session;
	$rs = api_sql_query($sql,__FILE__,__LINE__);
	if(mysql_result($rs,0,0)!=$_user['user_id'])
	{
		api_not_allowed(true);
	}
}


function search_users($needle)
{
	global $tbl_user;
	
	$xajax_response = new XajaxResponse();
	$return = '';
	if(!empty($needle))
	{
		// search users where username or firstname or lastname begins likes $needle
		$sql = 'SELECT user_id, username, lastname, firstname FROM '.$tbl_user.' user
				WHERE (username LIKE "'.$needle.'%"
				OR firstname LIKE "'.$needle.'%"
				OR lastname LIKE "'.$needle.'%")
				ORDER BY lastname, firstname, username
				LIMIT 10';
				
		$rs = api_sql_query($sql, __FILE__, __LINE__);
		
		while($user = Database :: fetch_array($rs))
		{
			$return .= '<a href="#" onclick="add_user_to_session(\''.$user['user_id'].'\',\''.$user['firstname'].' '.$user['lastname'].' ('.$user['username'].')'.'\')">'.$user['firstname'].' '.$user['lastname'].' ('.$user['username'].')</a><br />';
		}
	}
	$xajax_response -> addAssign('ajax_list_users','innerHTML',utf8_encode($return));
	return $xajax_response;
}
$xajax -> processRequests();

$htmlHeadXtra[] = $xajax->getJavascript('../inc/lib/xajax/');
$htmlHeadXtra[] = '
<script type="text/javascript">
function add_user_to_session (code, content) {

	document.getElementById("user_to_add").value = "";
	document.getElementById("ajax_list_users").innerHTML = "";
	
	destination = document.getElementById("destination_users");
	destination.options[destination.length] = new Option(content,code);
	
	destination.selectedIndex = -1;
	sortOptions(destination.options);
	
}
function remove_item(origin)
{
	for(var i = 0 ; i<origin.options.length ; i++) {
		if(origin.options[i].selected) {
			origin.options[i]=null;
			i = i-1;
		}
	}
}
</script>';


$formSent=0;
$errorMsg=$firstLetterUser=$firstLetterSession='';
$UserList=$SessionList=array();
$users=$sessions=array();
$noPHP_SELF=true;




if($_POST['formSent'])
{
	$formSent=$_POST['formSent'];
	$firstLetterUser=$_POST['firstLetterUser'];
	$firstLetterSession=$_POST['firstLetterSession'];
	$UserList=$_POST['sessionUsersList'];
	$ClassList=$_POST['sessionClassesList'];
	if(!is_array($UserList))
	{
		$UserList=array();
	}

	if($formSent == 1)
	{
		$result = api_sql_query("SELECT id_user FROM $tbl_session_rel_user WHERE id_session='$id_session'");
		$existingUsers = array();
		while($row = mysql_fetch_array($result)){
			$existingUsers[] = $row['id_user'];
		}

		$result=api_sql_query("SELECT course_code FROM $tbl_session_rel_course WHERE id_session='$id_session'",__FILE__,__LINE__);

		$CourseList=array();

		while($row=mysql_fetch_array($result))
		{
			$CourseList[]=$row['course_code'];
		}

		foreach($CourseList as $enreg_course)
		{
			$nbr_users=0;
			foreach($UserList as $enreg_user)
			{
				if(!in_array($enreg_user, $existingUsers)){
					api_sql_query("INSERT IGNORE INTO $tbl_session_rel_course_rel_user(id_session,course_code,id_user) VALUES('$id_session','$enreg_course','$enreg_user')",__FILE__,__LINE__);

					if(mysql_affected_rows())
					{
						$nbr_users++;
					}
				}
			}
			foreach($existingUsers as $existing_user){
				if(!in_array($existing_user, $UserList)){
					$sql = "DELETE FROM $tbl_session_rel_course_rel_user WHERE id_session='$id_session' AND course_code='$enreg_course' AND id_user='$existing_user'";
					api_sql_query($sql);

					if(mysql_affected_rows())
					{
						$nbr_users--;
					}
				}
			}
			$sql = "SELECT COUNT(id_user) as nbUsers FROM $tbl_session_rel_course_rel_user WHERE id_session='$id_session' AND course_code='$enreg_course'";
			$rs = api_sql_query($sql, __FILE__, __LINE__);
			list($nbr_users) = mysql_fetch_array($rs);
			api_sql_query("UPDATE $tbl_session_rel_course SET nbr_users=$nbr_users WHERE id_session='$id_session' AND course_code='$enreg_course'",__FILE__,__LINE__);

		}

		api_sql_query("DELETE FROM $tbl_session_rel_user WHERE id_session = $id_session");
		$nbr_users = 0;
		foreach($UserList as $enreg_user){
			$nbr_users++;
			api_sql_query("INSERT IGNORE INTO $tbl_session_rel_user(id_session, id_user) VALUES('$id_session','$enreg_user')",__FILE__,__LINE__);

		}
		$nbr_users = count($UserList);
		api_sql_query("UPDATE $tbl_session SET nbr_users= $nbr_users WHERE id='$id_session' ",__FILE__,__LINE__);

		//if(empty($_GET['add']))
			//header('Location: '.$_GET['page'].'?id_session='.$id_session);
		//else
		header('Location: resume_session.php?id_session='.$id_session);

	}
}

Display::display_header($tool_name);

api_display_tool_title($tool_name);

$nosessionUsersList = $sessionUsersList = array();
$sql = 'SELECT COUNT(1) FROM '.$tbl_user;
$rs = api_sql_query($sql, __FILE__, __LINE__);
$count_courses = mysql_result($rs, 0, 0);
$ajax_search = $count_courses > 100 ? true : false;

if($ajax_search)
{
	$sql="SELECT user_id, lastname, firstname, username, id_session
			FROM $tbl_user
			INNER JOIN $tbl_session_rel_user
				ON $tbl_session_rel_user.id_user = $tbl_user.user_id
				AND $tbl_session_rel_user.id_session = ".intval($id_session)."
			ORDER BY lastname,firstname,username";
	
	$result=api_sql_query($sql,__FILE__,__LINE__);	
	$Users=api_store_result($result);
	
	foreach($Users as $user)
	{
		$sessionUsersList[$user['user_id']] = $user ;
	}
}
else
{
	$sql="SELECT user_id, lastname, firstname, username, id_session
			FROM $tbl_user
			LEFT JOIN $tbl_session_rel_user
				ON $tbl_session_rel_user.id_user = $tbl_user.user_id
			ORDER BY lastname,firstname,username";
	
	$result=api_sql_query($sql,__FILE__,__LINE__);	
	$Users=api_store_result($result);
	
	foreach($Users as $user)
	{
		if($user['id_session'] == $id_session)
			$sessionUsersList[$user['user_id']] = $user ;
		else
			$nosessionUsersList[$user['user_id']] = $user ;
	}
}





?>

<form name="formulaire" method="post" action="<?php echo api_get_self(); ?>?page=<?php echo $_GET['page'] ?>&id_session=<?php echo $id_session; ?><?php if(!empty($_GET['add'])) echo '&add=true' ; ?>" style="margin:0px;">
<input type="hidden" name="formSent" value="1" />

<?php
if(!empty($errorMsg))
{
	Display::display_normal_message($errorMsg); //main API
}
?>

<table border="0" cellpadding="5" cellspacing="0" width="100%">


<!-- Users -->
<tr>
  <td align="center"><b><?php echo get_lang('UserListInPlatform') ?> :</b>
  </td>
  <td></td>
  <td align="center"><b><?php echo get_lang('UserListInSession') ?> :</b></td>
</tr>

<tr>
  <td align="center">
  <div id="content_source">
  	  <?php
  	  if($ajax_search)
  	  {
  	  	?>
		<input type="text" id="user_to_add" onkeyup="xajax_search_users(this.value)" />
		<div id="ajax_list_users"></div>
		<?php
  	  }
  	  else
  	  {
  	  ?>
  	  
	  <select id="origin_users" name="nosessionUsersList[]" multiple="multiple" size="15" style="width:300px;">

		<?php
		foreach($nosessionUsersList as $enreg)
		{
		?>

			<option value="<?php echo $enreg['user_id']; ?>"><?php echo $enreg['lastname'].' '.$enreg['firstname'].' ('.$enreg['username'].')'; ?></option>

		<?php
		}

		unset($nosessionUsersList);
		?>

	  </select>
	<?php
  	  }
  	 ?>
  </div>
  </td>
  <td width="10%" valign="middle" align="center">
  <?php
  if($ajax_search)
  {
  ?>
  	<input type="button" onclick="remove_item(document.getElementById('destination_users'))" value="<<" />
  <?php
  }
  else
  {
  ?>
	<input type="button" onclick="moveItem(document.getElementById('origin_users'), document.getElementById('destination_users'))" value=">>" />
	<br /><br />
	<input type="button" onclick="moveItem(document.getElementById('destination_users'), document.getElementById('origin_users'))" value="<<" />
	<?php 
  } 
  ?>
	<br /><br /><br /><br /><br /><br />
  </td>
  <td align="center">
  <select id="destination_users" name="sessionUsersList[]" multiple="multiple" size="15" style="width:300px;">

<?php
foreach($sessionUsersList as $enreg)
{
?>

	<option value="<?php echo $enreg['user_id']; ?>"><?php echo $enreg['lastname'].' '.$enreg['firstname'].' ('.$enreg['username'].')'; ?></option>

<?php
}

unset($sessionUsersList);
?>

  </select></td>
</tr>

<tr>
	<td colspan="3" align="center">
		<br />
		<?php
		if(isset($_GET['add']))
			echo '<input type="button" value="'.get_lang("FinishSessionCreation").'" onclick="valide()" />';
		else
			echo '<input type="button" value="'.get_lang('Ok').'" onclick="valide()" />';
		?>
	</td>
</tr>




</table>

</form>
<script type="text/javascript">
<!--
function moveItem(origin , destination){

	for(var i = 0 ; i<origin.options.length ; i++) {
		if(origin.options[i].selected) {
			destination.options[destination.length] = new Option(origin.options[i].text,origin.options[i].value);
			origin.options[i]=null;
			i = i-1;
		}
	}
	destination.selectedIndex = -1;
	sortOptions(destination.options);

}

function sortOptions(options) {

	newOptions = new Array();
	for (i = 0 ; i<options.length ; i++)
		newOptions[i] = options[i];

	newOptions = newOptions.sort(mysort);
	options.length = 0;
	for(i = 0 ; i < newOptions.length ; i++)
		options[i] = newOptions[i];

}

function mysort(a, b){
	if(a.text.toLowerCase() > b.text.toLowerCase()){
		return 1;
	}
	if(a.text.toLowerCase() < b.text.toLowerCase()){
		return -1;
	}
	return 0;
}

function valide(){
	var options = document.getElementById('destination_users').options;
	for (i = 0 ; i<options.length ; i++)
		options[i].selected = true;
	/*
	var options = document.getElementById('destination_classes').options;
	for (i = 0 ; i<options.length ; i++)
		options[i].selected = true;
		*/
	document.forms.formulaire.submit();
}


function loadUsersInSelect(select){

	var xhr_object = null;

	if(window.XMLHttpRequest) // Firefox
		xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // Internet Explorer
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else  // XMLHttpRequest non supporté par le navigateur
	alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");

	//xhr_object.open("GET", "loadUsersInSelect.ajax.php?id_session=<?php echo $id_session ?>&letter="+select.options[select.selectedIndex].text, false);
	xhr_object.open("POST", "loadUsersInSelect.ajax.php");

	xhr_object.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");


	nosessionUsers = makepost(document.getElementById('origin_users'));
	sessionUsers = makepost(document.getElementById('destination_users'));
	nosessionClasses = makepost(document.getElementById('origin_classes'));
	sessionClasses = makepost(document.getElementById('destination_classes'));
	xhr_object.send("nosessionusers="+nosessionUsers+"&sessionusers="+sessionUsers+"&nosessionclasses="+nosessionClasses+"&sessionclasses="+sessionClasses);

	xhr_object.onreadystatechange = function() {
		if(xhr_object.readyState == 4) {
			document.getElementById('content_source').innerHTML = result = xhr_object.responseText;
			//alert(xhr_object.responseText);
		}
	}
}

function makepost(select){

	var options = select.options;
	var ret = "";
	for (i = 0 ; i<options.length ; i++)
		ret = ret + options[i].value +'::'+options[i].text+";;";

	return ret;

}
-->

</script>
<?php
/*
==============================================================================
		FOOTER
==============================================================================
*/
Display::display_footer();
?>
