File Source for course

<?php // $Id: course_category.php 14214 2008-01-31 03:31:49Z yannoo $
/*
==============================================================================
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';
$cidReset=true;
require('../inc/global.inc.php');
$this_section=SECTION_PLATFORM_ADMIN;
api_protect_admin_script();
$category=$_GET['category'];
$action=$_GET['action'];
$tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
$tbl_category = Database::get_main_table(TABLE_MAIN_CATEGORY);
$errorMsg='';
if(!empty($action))
{
if($action == 'delete')
{
deleteNode($_GET['id']);
header('Location: '.api_get_self().'?category='.Security::remove_XSS($category));
exit();
}
elseif(($action == 'add' || $action == 'edit') && $_POST['formSent'])
{
$_POST['categoryCode']=trim($_POST['categoryCode']);
$_POST['categoryName']=trim($_POST['categoryName']);
if(!empty($_POST['categoryCode']) && !empty($_POST['categoryName']))
{
if($action == 'add')
{
$ret=addNode($_POST['categoryCode'],$_POST['categoryName'],$_POST['canHaveCourses'],$category);
}
else
{
$ret=editNode($_POST['categoryCode'],$_POST['categoryName'],$_POST['canHaveCourses'],$_GET['id']);
}
if($ret)
{
$action='';
}
else
{
$errorMsg=get_lang('CatCodeAlreadyUsed');
}
}
else
{
$errorMsg=get_lang('PleaseEnterCategoryInfo');
}
}
elseif($action == 'edit')
{
$categoryCode=Database::escape_string($_GET['id']);
$result=api_sql_query("SELECT name,auth_course_child FROM $tbl_category WHERE code='$categoryCode'",__FILE__,__LINE__);
list($categoryName,$canHaveCourses)=Database::fetch_row($result);
$canHaveCourses=($canHaveCourses == 'FALSE')?0:1;
}
elseif($action == 'moveUp')
{
moveNodeUp($_GET['id'],$_GET['tree_pos'],$category);
header('Location: '.api_get_self().'?category='.Security::remove_XSS($category));
exit();
}
}
$tool_name=get_lang('AdminCategories');
$interbreadcrumb[]=array('url' => 'index.php',"name" => get_lang('PlatformAdmin'));
Display::display_header($tool_name);
//api_display_tool_title($tool_name);
if(!empty($category))
{
$myquery = "SELECT * FROM $tbl_category WHERE code ='$category'";
$result = api_sql_query($myquery,__FILE__,__LINE__);
if(Database::num_rows($result)==0)
{
$category = '';
}
}
if(empty($action))
{
$myquery="SELECT t1.name,t1.code,t1.parent_id,t1.tree_pos,t1.children_count,COUNT(DISTINCT t3.code) AS nbr_courses FROM $tbl_category t1 LEFT JOIN $tbl_category t2 ON t1.code=t2.parent_id LEFT JOIN $tbl_course t3 ON t3.category_code=t1.code WHERE t1.parent_id ".(empty($category)?"IS NULL":"='$category'")." GROUP BY t1.name,t1.code,t1.parent_id,t1.tree_pos,t1.children_count ORDER BY t1.tree_pos";
$result=api_sql_query($myquery,__FILE__,__LINE__);
$Categories=api_store_result($result);
}
if(!empty($category) && empty($action))
{
$myquery = "SELECT parent_id FROM $tbl_category WHERE code='$category'";
$result=api_sql_query($myquery,__FILE__,__LINE__);
$parent_id = 0;
if(Database::num_rows($result)>0){
$parent_id=Database::fetch_row($result);
}
?>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($parent_id); ?>"><< <?php echo get_lang("Back"); if(!empty($parent_id)) echo ' ('.$parent_id.')'; ?></a>
<?php
}
if($action == 'add' || $action == 'edit')
{
?>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($category); ?>"><< <?php echo get_lang("Back"); if(!empty($category)) echo ' ('.Security::remove_XSS($category).')'; ?></a>
<h3><?php echo ($action == 'add')?get_lang('AddACategory'):get_lang('EditNode'); if(!empty($category)) echo ' '.get_lang('Into').' '.Security::remove_XSS($category); ?></h3>
<form method="post" action="<?php echo api_get_self(); ?>?action=<?php echo Security::remove_XSS($action); ?>&category=<?php echo Security::remove_XSS($category); ?>&id=<?php echo Security::remove_XSS($_GET['id']); ?>">
<input type="hidden" name="formSent" value="1" />
<table border="0" cellpadding="5" cellspacing="0">
<?php
if(!empty($errorMsg))
{
?>
<tr>
<td colspan="2">
<?php
Display::display_normal_message($errorMsg); //main API
?>
</td>
</tr>
<?php
}
?>
<tr>
<td nowrap="nowrap"><?php echo get_lang("CategoryCode"); ?> :</td>
<td><input type="text" name="categoryCode" size="20" maxlength="20" value="<?php echo htmlentities(stripslashes($categoryCode),ENT_QUOTES,$charset); ?>" /></td>
</tr>
<tr>
<td nowrap="nowrap"><?php echo get_lang("CategoryName"); ?> :</td>
<td><input type="text" name="categoryName" size="20" maxlength="100" value="<?php echo htmlentities(stripslashes($categoryName),ENT_QUOTES,$charset); ?>" /></td>
</tr>
<tr>
<td nowrap="nowrap"><?php echo get_lang("AllowCoursesInCategory"); ?></td>
<td>
<input class="checkbox" type="radio" name="canHaveCourses" value="0" <?php if(($action == 'edit' && !$canHaveCourses) || ($action == 'add' && $formSent && !$canHaveCourses)) echo 'checked="checked"'; ?> /><?php echo get_lang("No"); ?>
<input class="checkbox" type="radio" name="canHaveCourses" value="1" <?php if(($action == 'edit' && $canHaveCourses) || ($action == 'add' && !$formSent || $canHaveCourses)) echo 'checked="checked"'; ?> /><?php echo get_lang("Yes"); ?>
</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="<?php echo get_lang("Ok"); ?>" /></td>
</tr>
</table>
</form>
<?php
}
else
{
?>
<ul>
<?php
if(count($Categories)>0)
{
foreach($Categories as $enreg)
{
?>
<li>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($enreg['code']); ?>"><img src="../img/folder_document.gif" border="0" title="<?php echo get_lang("OpenNode"); ?>" alt="<?php echo get_lang("OpenNode"); ?>" align="absbottom" /></a>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($category); ?>&action=edit&id=<?php echo Security::remove_XSS($enreg['code']); ?>"><img src="../img/edit.gif" border="0" title="<?php echo get_lang("EditNode"); ?>" alt ="<?php echo get_lang("EditNode"); ?>" /></a>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($category); ?>&action=delete&id=<?php echo Security::remove_XSS($enreg['code']); ?>" onclick="javascript:if(!confirm('<?php echo addslashes(htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)); ?>')) return false;"><img src="../img/delete.gif" border="0" title="<?php echo get_lang("DeleteNode"); ?>" alt="<?php echo get_lang("DeleteNode"); ?>" /></a>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($category); ?>&action=moveUp&id=<?php echo Security::remove_XSS($enreg['code']); ?>&tree_pos=<?php echo $enreg['tree_pos']; ?>"><img src="../img/up.gif" border="0" title="<?php echo get_lang("UpInSameLevel"); ?>" alt="<?php echo get_lang("UpInSameLevel"); ?>" /></a>
<?php echo $enreg['name']; ?>
(<?php echo $enreg['children_count']; ?> <?php echo get_lang("Categories"); ?> - <?php echo $enreg['nbr_courses']; ?> <?php echo get_lang("Courses"); ?>)
</li>
<?php
}
unset($Categories);
}
else
{
echo get_lang("NoCategories");
}
?>
</ul>
<a href="<?php echo api_get_self(); ?>?category=<?php echo Security::remove_XSS($category); ?>&action=add"><?php echo get_lang("AddACategory"); if(!empty($category)) echo ' '.get_lang('Into').' '.Security::remove_XSS($category); ?></a>
<?php
}
/*
==============================================================================
FOOTER
==============================================================================
*/
Display::display_footer();
/******** Functions ********/
function deleteNode($node)
{
global $tbl_category, $tbl_course;
$node = Database::escape_string($node);
$result=api_sql_query("SELECT parent_id,tree_pos FROM $tbl_category WHERE code='$node'",__FILE__,__LINE__);
if($row=Database::fetch_array($result))
{
if(!empty($row['parent_id']))
{
api_sql_query("UPDATE $tbl_course SET category_code='".$row['parent_id']."' WHERE category_code='$node'",__FILE__,__LINE__);
api_sql_query("UPDATE $tbl_category SET parent_id='".$row['parent_id']."' WHERE parent_id='$node'",__FILE__,__LINE__);
}
else
{
api_sql_query("UPDATE $tbl_course SET category_code='' WHERE category_code='$node'",__FILE__,__LINE__);
api_sql_query("UPDATE $tbl_category SET parent_id=NULL WHERE parent_id='$node'",__FILE__,__LINE__);
}
api_sql_query("UPDATE $tbl_category SET tree_pos=tree_pos-1 WHERE tree_pos > '".$row['tree_pos']."'",__FILE__,__LINE__);
api_sql_query("DELETE FROM $tbl_category WHERE code='$node'",__FILE__,__LINE__);
if(!empty($row['parent_id']))
{
updateFils($row['parent_id']);
}
}
}
function addNode($code,$name,$canHaveCourses,$parent_id)
{
global $tbl_category;
$canHaveCourses=$canHaveCourses?'TRUE':'FALSE';
$code = Database::escape_string($code);
$name = Database::escape_string($name);
$parent_id = Database::escape_string($parent_id);
$result=api_sql_query("SELECT 1 FROM $tbl_category WHERE code='$code'",__FILE__,__LINE__);
if(Database::num_rows($result))
{
return false;
}
$result=api_sql_query("SELECT MAX(tree_pos) AS maxTreePos FROM $tbl_category",__FILE__,__LINE__);
$row=Database::fetch_array($result);
$tree_pos=$row['maxTreePos']+1;
api_sql_query("INSERT INTO $tbl_category(name,code,parent_id,tree_pos,children_count,auth_course_child) VALUES('$name','$code',".(empty($parent_id)?"NULL":"'$parent_id'").",'$tree_pos','0','$canHaveCourses')",__FILE__,__LINE__);
updateFils($parent_id);
return true;
}
function editNode($code,$name,$canHaveCourses,$old_code)
{
global $tbl_category;
$canHaveCourses=$canHaveCourses?'TRUE':'FALSE';
$code = Database::escape_string($code);
$name = Database::escape_string($name);
$old_code = Database::escape_string($old_code);
if($code != $old_code)
{
$result=api_sql_query("SELECT 1 FROM $tbl_category WHERE code='$code'",__FILE__,__LINE__);
if(Database::num_rows($result))
{
return false;
}
}
api_sql_query("UPDATE $tbl_category SET name='$name',code='$code',auth_course_child='$canHaveCourses' WHERE code='$old_code'",__FILE__,__LINE__);
return true;
}
function moveNodeUp($code,$tree_pos,$parent_id)
{
global $tbl_category;
$code = Database::escape_string($code);
$tree_pos = Database::escape_string($tree_pos);
$parent_id = Database::escape_string($parent_id);
$result=api_sql_query("SELECT code,tree_pos FROM $tbl_category WHERE parent_id ".(empty($parent_id)?"IS NULL":"='$parent_id'")." AND tree_pos<'$tree_pos' ORDER BY tree_pos DESC LIMIT 0,1",__FILE__,__LINE__);
if(!$row=Database::fetch_array($result))
{
$result=api_sql_query("SELECT code,tree_pos FROM $tbl_category WHERE parent_id ".(empty($parent_id)?"IS NULL":"='$parent_id'")." AND tree_pos>'$tree_pos' ORDER BY tree_pos DESC LIMIT 0,1",__FILE__,__LINE__);
if(!$row=Database::fetch_array($result))
{
return false;
}
}
api_sql_query("UPDATE $tbl_category SET tree_pos='".$row['tree_pos']."' WHERE code='$code'",__FILE__,__LINE__);
api_sql_query("UPDATE $tbl_category SET tree_pos='$tree_pos' WHERE code='$row[code]'",__FILE__,__LINE__);
}
function updateFils($category)
{
global $tbl_category;
$category = Database::escape_string($category);
$result=api_sql_query("SELECT parent_id FROM $tbl_category WHERE code='$category'",__FILE__,__LINE__);
if($row=Database::fetch_array($result))
{
updateFils($row['parent_id']);
}
$children_count=compterFils($category,0)-1;
api_sql_query("UPDATE $tbl_category SET children_count='$children_count' WHERE code='$category'",__FILE__,__LINE__);
}
function compterFils($pere,$cpt)
{
global $tbl_category;
$pere = Database::escape_string($pere);
$result=api_sql_query("SELECT code FROM $tbl_category WHERE parent_id='$pere'",__FILE__,__LINE__);
while($row=Database::fetch_array($result))
{
$cpt=compterFils($row['code'],$cpt);
}
return ($cpt+1);
}
?>

Source for file course_category.php