File Source for lp_controller.php

<?php //$id: $
/**
* Controller script. Prepares the common background variables to give to the scripts corresponding to
* the requested action
* @package dokeos.learnpath
* @author Yannick Warnier <ywarnier@beeznest.org>
*/
/**
* Initialisations
*/
$debug = 0;
if($debug>0) error_log('New LP -+- Entered lp_controller.php -+-',0);
// name of the language file that needs to be included
if (isset($_GET['action']))
{
if($_GET['action'] == 'export')
{ //only needed on export
$language_file[] = 'hotspot';
$language_file[] = 'exercice';
}
}
$language_file[] = "course_home";
$language_file[] = "scormdocument";
$language_file[] = "scorm";
$language_file[] = "learnpath";
$language_file[] = 'resourcelinker';
//flag to allow for anonymous user - needs to be set before global.inc.php
$use_anonymous = true;
//include class definitions before session_start() to ensure availability when touching
//session vars containing learning paths
require_once('learnpath.class.php');
if($debug>0) error_log('New LP - Included learnpath',0);
require_once('learnpathItem.class.php');
if($debug>0) error_log('New LP - Included learnpathItem',0);
require_once('scorm.class.php');
if($debug>0) error_log('New LP - Included scorm',0);
require_once('scormItem.class.php');
if($debug>0) error_log('New LP - Included scormItem',0);
require_once('aicc.class.php');
if($debug>0) error_log('New LP - Included aicc',0);
require_once('aiccItem.class.php');
if($debug>0) error_log('New LP - Included aiccItem',0);
require_once('back_compat.inc.php');
if($debug>0) error_log('New LP - Included back_compat',0);
if ($is_allowed_in_course == false){
api_not_allowed(true);
}
require_once(api_get_path(LIBRARY_PATH) . "/fckeditor/fckeditor.php");
$lpfound = false;
$myrefresh = 0;
$myrefresh_id = 0;
if(!empty($_SESSION['refresh']) && $_SESSION['refresh']==1){
//check if we should do a refresh of the oLP object (for example after editing the LP)
//if refresh is set, we regenerate the oLP object from the database (kind of flush)
api_session_unregister('refresh');
$myrefresh = 1;
if($debug>0) error_log('New LP - Refresh asked',0);
}
if($debug>0) error_log('New LP - Passed refresh check',0);
if(!empty($_REQUEST['dialog_box'])){
$dialog_box = stripslashes(urldecode($_REQUEST['dialog_box']));
}
$lp_controller_touched = 1;
if(isset($_SESSION['lpobject']))
{
if($debug>0) error_log('New LP - SESSION[lpobject] is defined',0);
$oLP = unserialize($_SESSION['lpobject']);
if(is_object($oLP)){
if($debug>0) error_log('New LP - oLP is object',0);
if($myrefresh == 1 OR $oLP->cc != api_get_course_id()){
if($debug>0) error_log('New LP - Course has changed, discard lp object',0);
if($myrefresh == 1){$myrefresh_id = $oLP->get_id();}
$oLP = null;
api_session_unregister('oLP');
api_session_unregister('lpobject');
}else{
$_SESSION['oLP'] = $oLP;
$lp_found = true;
}
}
}
if($debug>0) error_log('New LP - Passed data remains check',0);
if($lp_found == false
|| ($_SESSION['oLP']->get_id() != $_REQUEST['lp_id'])
)
{
if($debug>0) error_log('New LP - oLP is not object, has changed or refresh been asked, getting new',0);
//regenerate a new lp object? Not always as some pages don't need the object (like upload?)
if(!empty($_REQUEST['lp_id']) || !empty($myrefresh_id)){
if($debug>0) error_log('New LP - lp_id is defined',0);
//select the lp in the database and check which type it is (scorm/dokeos/aicc) to generate the
//right object
$lp_table = Database::get_course_table('lp');
if(!empty($_REQUEST['lp_id'])){
$lp_id = learnpath::escape_string($_REQUEST['lp_id']);
}else{
$lp_id = $myrefresh_id;
}
$sel = "SELECT * FROM $lp_table WHERE id = $lp_id";
if($debug>0) error_log('New LP - querying '.$sel,0);
$res = api_sql_query($sel);
if(Database::num_rows($res))
{
$row = Database::fetch_array($res);
$type = $row['lp_type'];
if($debug>0) error_log('New LP - found row - type '.$type. ' - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(),0);
switch($type){
case 1:
if($debug>0) error_log('New LP - found row - type dokeos - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(),0);
$oLP = new learnpath(api_get_course_id(),$lp_id,api_get_user_id());
if($oLP !== false){ $lp_found = true; }else{eror_log($oLP->error,0);}
break;
case 2:
if($debug>0) error_log('New LP - found row - type scorm - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(),0);
$oLP = new scorm(api_get_course_id(),$lp_id,api_get_user_id());
if($oLP !== false){ $lp_found = true; }else{eror_log($oLP->error,0);}
break;
case 3:
if($debug>0) error_log('New LP - found row - type aicc - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(),0);
$oLP = new aicc(api_get_course_id(),$lp_id,api_get_user_id());
if($oLP !== false){ $lp_found = true; }else{eror_log($oLP->error,0);}
break;
default:
if($debug>0) error_log('New LP - found row - type other - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(),0);
$oLP = new learnpath(api_get_course_id(),$lp_id,api_get_user_id());
if($oLP !== false){ $lp_found = true; }else{eror_log($oLP->error,0);}
break;
}
}
}else{
if($debug>0) error_log('New LP - Request[lp_id] and refresh_id were empty',0);
}
if($lp_found)
{
$_SESSION['oLP'] = $oLP;
}
}
if($debug>0) error_log('New LP - Passed oLP creation check',0);
/**
* Actions switching
*/
$_SESSION['oLP']->update_queue = array(); //reinitialises array used by javascript to update items in the TOC
$_SESSION['oLP']->message = ''; //should use ->clear_message() method but doesn't work
$fck_attribute['Width'] = '100%';
$fck_attribute['Height'] = '950';
$fck_attribute['ToolbarSet'] = 'Full';
$fck_attribute['Config']['FullPage'] = true;
if($_GET['isStudentView'] == 'true')
{
if($_REQUEST['action'] != 'list' AND $_REQUEST['action'] != 'view')
{
if(!empty($_REQUEST['lp_id']))
{
$_REQUEST['action'] = 'view';
}
else
{
$_REQUEST['action'] = 'list';
}
}
}
switch($_REQUEST['action'])
{
case 'add_item':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - add item action triggered', 0);
if(!$lp_found)
{ //check if the learnpath ID was defined, otherwise send back to list
error_log('New LP - No learnpath given for add item', 0);
require('lp_list.php');
}
else
{
$_SESSION['refresh'] = 1;
if(isset($_POST['submit_button']) && !empty($_POST['title']))
{ //if a title was sumbitted
if(isset($_SESSION['post_time']) && $_SESSION['post_time'] == $_POST['post_time'])
{ //check post_time to ensure ??? (counter-hacking measure?)
require('lp_add_item.php');
}
else
{
$_SESSION['post_time'] = $_POST['post_time'];
if($_POST['type'] == TOOL_DOCUMENT)
{
if(isset($_POST['path']) && $_GET['edit'] != 'true')
{
$document_id = $_POST['path'];
}
else
{
$document_id = $_SESSION['oLP']->create_document($_course);
}
$new_item_id = $_SESSION['oLP']->add_item($_POST['parent'], $_POST['previous'], $_POST['type'], $document_id, $_POST['title'], $_POST['description'], $_POST['prerequisites']);
}
else
{ //for all other item types than documents, load the item using the item type and path rather than its ID
$new_item_id = $_SESSION['oLP']->add_item($_POST['parent'], $_POST['previous'], $_POST['type'], $_POST['path'], $_POST['title'], $_POST['description'], $_POST['prerequisites']);
}
//display
require('lp_add_item.php');
}
}
else
{
require('lp_add_item.php');
}
}
break;
case 'add_lp':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - add_lp action triggered', 0);
$_REQUEST['learnpath_name'] = trim($_REQUEST['learnpath_name']);
if(!empty($_REQUEST['learnpath_name']))
{
$_SESSION['refresh'] = 1;
if(isset($_SESSION['post_time']) && $_SESSION['post_time'] == $_REQUEST['post_time'])
{
require('lp_add.php');
}
else
{
$_SESSION['post_time'] = $_REQUEST['post_time'];
//Kevin Van Den Haute: changed $_REQUEST['learnpath_description'] by '' because it's not used
//old->$new_lp_id = learnpath::add_lp(api_get_course_id(), $_REQUEST['learnpath_name'], $_REQUEST['learnpath_description'], 'dokeos', 'manual', '');
$new_lp_id = learnpath::add_lp(api_get_course_id(), $_REQUEST['learnpath_name'], '', 'dokeos', 'manual', '');
//learnpath::toggle_visibility($new_lp_id,'v');
//Kevin Van Den Haute: only go further if learnpath::add_lp has returned an id
if(is_numeric($new_lp_id))
{
//TODO maybe create a first module directly to avoid bugging the user with useless queries
$_SESSION['oLP'] = new learnpath(api_get_course_id(),$new_lp_id,api_get_user_id());
//$_SESSION['oLP']->add_item(0,-1,'dokeos_chapter',$_REQUEST['path'],'Default');
require('lp_build.php');
}
}
}
else
require('lp_add.php');
break;
case 'admin_view':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - admin_view action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for admin_view', 0); require('lp_list.php'); }
else
{
$_SESSION['refresh'] = 1;
require('lp_admin_view.php');
}
break;
case 'build':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - build action triggered', 0);
if(!$lp_found){ error_log('New LP - No learnpath given for build', 0); require('lp_list.php'); }
else
{
$_SESSION['refresh'] = 1;
require('lp_build.php');
}
break;
case 'delete_item':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - delete item action triggered', 0);
if(!$lp_found){ error_log('New LP - No learnpath given for delete item', 0); require('lp_list.php'); }
else
{
$_SESSION['refresh'] = 1;
if(is_numeric($_GET['id']))
{
$_SESSION['oLP']->delete_item($_GET['id']);
$is_success = true;
}
if(isset($_GET['view']) && $_GET['view'] == 'build')
{
require('lp_build.php');
}
else
{
require('lp_admin_view.php');
}
}
break;
case 'edit_item':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - edit item action triggered', 0);
if(!$lp_found){ error_log('New LP - No learnpath given for edit item', 0); require('lp_list.php'); }
else
{
$_SESSION['refresh'] = 1;
if(isset($_POST['submit_button']) && !empty($_POST['title']))
{
$_SESSION['oLP']->edit_item($_GET['id'], $_POST['parent'], $_POST['previous'], $_POST['title'], $_POST['description'], $_POST['prerequisites']);
if(isset($_POST['content_lp']))
{
$_SESSION['oLP']->edit_document($_course);
}
$is_success = true;
}
if(isset($_GET['view']) && $_GET['view'] == 'build')
{
require('lp_edit_item.php');
}
else
{
require('lp_admin_view.php');
}
}
break;
case 'edit_item_prereq':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - edit item prereq action triggered', 0);
if(!$lp_found){ error_log('New LP - No learnpath given for edit item prereq', 0); require('lp_list.php'); }
else
{
if(isset($_POST['submit_button']))
{
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->edit_item_prereq($_GET['id'], $_POST['prerequisites'], $_POST['min_' . $_POST['prerequisites']], $_POST['max_' . $_POST['prerequisites']]);
}
require('lp_edit_item_prereq.php');
}
break;
case 'move_item':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug > 0) error_log('New LP - move item action triggered', 0);
if(!$lp_found){ error_log('New LP - No learnpath given for move item', 0); require('lp_list.php'); }
else
{
$_SESSION['refresh'] = 1;
if(isset($_POST['submit_button']))
{
$_SESSION['oLP']->edit_item($_GET['id'], $_POST['parent'], $_POST['previous'], $_POST['title'], $_POST['description']);
$is_success = true;
}
if(isset($_GET['view']) && $_GET['view'] == 'build')
{
require('lp_move_item.php');
}
else
{
$_SESSION['oLP']->move_item($_GET['id'], $_GET['direction']);
require('lp_admin_view.php');
}
}
break;
case 'view_item':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - view_item action triggered', 0);
if(!$lp_found){ error_log('New LP - No learnpath given for view item', 0); require('lp_list.php'); }
else
{
$_SESSION['refresh'] = 1;
require('lp_view_item.php');
}
break;
case 'upload':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - upload action triggered',0);
$cwdir = getcwd();
require('lp_upload.php');
//reinit current working directory as many functions in upload change it
chdir($cwdir);
require('lp_list.php');
break;
case 'export':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - export action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for export',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->scorm_export();
exit();
//require('lp_list.php');
}
break;
case 'delete':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - delete action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for delete',0); require('lp_list.php'); }
else{
$_SESSION['refresh'] = 1;
//remove lp from homepage if it is there
//$_SESSION['oLP']->toggle_visibility((int)$_GET['lp_id'],'i');
$_SESSION['oLP']->delete(null,(int)$_GET['lp_id'],'remove');
api_session_unregister('oLP');
require('lp_list.php');
}
break;
case 'toggle_visible': //change lp visibility (inside lp tool)
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - visibility action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for visibility',0); require('lp_list.php'); }
else{
learnpath::toggle_visibility($_REQUEST['lp_id'],$_REQUEST['new_status']);
require('lp_list.php');
}
break;
case 'toggle_publish': //change lp published status (visibility on homepage)
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - publish action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for publish',0); require('lp_list.php'); }
else{
learnpath::toggle_publish($_REQUEST['lp_id'],$_REQUEST['new_status']);
require('lp_list.php');
}
break;
case 'move_lp_up': //change lp published status (visibility on homepage)
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - publish action triggered',0);
if(!$lp_found)
{
error_log('New LP - No learnpath given for publish',0);
require('lp_list.php');
}
else
{
learnpath::move_up($_REQUEST['lp_id']);
require('lp_list.php');
}
break;
case 'move_lp_down': //change lp published status (visibility on homepage)
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - publish action triggered',0);
if(!$lp_found){
error_log('New LP - No learnpath given for publish',0);
require('lp_list.php');
}
else
{
learnpath::move_down($_REQUEST['lp_id']);
require('lp_list.php');
}
break;
case 'edit':
if(!api_is_allowed_to_edit())
{
api_not_allowed(true);
}
if($debug>0) error_log('New LP - edit action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for edit',0); require('lp_list.php'); }
else{
$_SESSION['refresh'] = 1;
require('lp_edit.php');
}
break;
case 'update_lp':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - update_lp action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for edit',0); require('lp_list.php'); }
else{
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->set_name($_REQUEST['lp_name']);
$_SESSION['oLP']->set_encoding($_REQUEST['lp_encoding']);
$_SESSION['oLP']->set_maker($_REQUEST['lp_maker']);
$_SESSION['oLP']->set_proximity($_REQUEST['lp_proximity']);
$_SESSION['oLP']->set_theme($_REQUEST['lp_theme']);
require('lp_list.php');
}
break;
case 'add_sub_item': //add an item inside a chapter
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - add sub item action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for add sub item',0); require('lp_list.php'); }
else{
$_SESSION['refresh'] = 1;
if(!empty($_REQUEST['parent_item_id'])){
$_SESSION['from_learnpath']='yes';
$_SESSION['origintoolurl'] = 'lp_controller.php?action=admin_view&lp_id='.$_REQUEST['lp_id'];
require('resourcelinker.php');
//$_SESSION['oLP']->add_sub_item($_REQUEST['parent_item_id'],$_REQUEST['previous'],$_REQUEST['type'],$_REQUEST['path'],$_REQUEST['title']);
}else{
require('lp_admin_view.php');
}
}
break;
case 'deleteitem':
case 'delete_item':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - delete item action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for delete item',0); require('lp_list.php'); }
else{
$_SESSION['refresh'] = 1;
if(!empty($_REQUEST['id'])){
$_SESSION['oLP']->delete_item($_REQUEST['id']);
}
require('lp_admin_view.php');
}
break;
case 'edititemprereq':
case 'edit_item_prereq':
if(!api_is_allowed_to_edit()){
api_not_allowed(true);
}
if($debug>0) error_log('New LP - edit item prereq action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for edit item prereq',0); require('lp_list.php'); }
else{
if(!empty($_REQUEST['id']) && !empty($_REQUEST['submit_item'])){
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->edit_item_prereq($_REQUEST['id'],$_REQUEST['prereq']);
}
require('lp_admin_view.php');
}
break;
case 'restart':
if($debug>0) error_log('New LP - restart action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for restart',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->restart();
require('lp_view.php');
}
break;
case 'last':
if($debug>0) error_log('New LP - last action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for last',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->last();
require('lp_view.php');
}
break;
case 'first':
if($debug>0) error_log('New LP - first action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for first',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->first();
require('lp_view.php');
}
break;
case 'next':
if($debug>0) error_log('New LP - next action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for next',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->next();
require('lp_view.php');
}
break;
case 'previous':
if($debug>0) error_log('New LP - previous action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for previous',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->previous();
require('lp_view.php');
}
break;
case 'content':
if($debug>0) error_log('New LP - content action triggered',0);
if($debug>0) error_log('New LP - Item id is '.$_GET['item_id'],0);
if(!$lp_found){ error_log('New LP - No learnpath given for content',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->save_last();
$_SESSION['oLP']->set_current_item($_GET['item_id']);
$_SESSION['oLP']->start_current_item();
require('lp_content.php');
}
break;
case 'view':
if($debug > 0)
error_log('New LP - view action triggered', 0);
if(!$lp_found)
{
error_log('New LP - No learnpath given for view', 0);
require('lp_list.php');
}
else
{
if($debug > 0){error_log('New LP - Trying to set current item to ' . $_REQUEST['item_id'], 0);}
$_SESSION['oLP']->set_current_item($_REQUEST['item_id']);
require('lp_view.php');
}
break;
case 'save':
if($debug>0) error_log('New LP - save action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for save',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->save_item();
require('lp_save.php');
}
break;
case 'stats':
if($debug>0) error_log('New LP - stats action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for stats',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->save_current();
$_SESSION['oLP']->save_last();
//declare variables to be used in lp_stats.php
$lp_id = $_SESSION['oLP']->get_id();
$list = $_SESSION['oLP']->get_flat_ordered_items_list($lp_id);
$user_id = api_get_user_id();
$stats_charset = $_SESSION['oLP']->encoding;
require('lp_stats.php');
}
break;
case 'list':
if($debug>0) error_log('New LP - list action triggered',0);
if($lp_found){
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->save_last();
}
require('lp_list.php');
break;
case 'mode':
//switch between fullscreen and embedded mode
if($debug>0) error_log('New LP - mode change triggered',0);
$mode = $_REQUEST['mode'];
if($mode == 'fullscreen'){
$_SESSION['oLP']->mode = 'fullscreen';
}else{
$_SESSION['oLP']->mode = 'embedded';
}
require('lp_view.php');
break;
case 'switch_view_mode':
if($debug>0) error_log('New LP - switch_view_mode action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for switch',0); require('lp_list.php'); }
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->update_default_view_mode();
require('lp_list.php');
break;
case 'switch_force_commit':
if($debug>0) error_log('New LP - switch_force_commit action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for switch',0); require('lp_list.php'); }
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->update_default_scorm_commit();
require('lp_list.php');
break;
case 'switch_reinit':
if($debug>0) error_log('New LP - switch_reinit action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for switch',0); require('lp_list.php'); }
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->update_reinit();
require('lp_list.php');
break;
case 'switch_scorm_debug':
if($debug>0) error_log('New LP - switch_scorm_debug action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for switch',0); require('lp_list.php'); }
$_SESSION['refresh'] = 1;
$_SESSION['oLP']->update_scorm_debug();
require('lp_list.php');
break;
case 'intro_cmdAdd':
if($debug>0) error_log('New LP - intro_cmdAdd action triggered',0);
//add introduction section page
break;
case 'js_api_refresh':
if($debug>0) error_log('New LP - js_api_refresh action triggered',0);
if(!$lp_found){ error_log('New LP - No learnpath given for js_api_refresh',0); require('lp_message.php'); }
if(isset($_REQUEST['item_id'])){
$htmlHeadXtra[] = $_SESSION['oLP']->get_js_info($_REQUEST['item_id']);
}
require('lp_message.php');
break;
case 'return_to_course_homepage':
if(!$lp_found){ error_log('New LP - No learnpath given for stats',0); require('lp_list.php'); }
else{
$_SESSION['oLP']->save_current();
$_SESSION['oLP']->save_last();
//declare variables to be used in lp_stats.php
$lp_id = $_SESSION['oLP']->get_id();
$list = $_SESSION['oLP']->get_flat_ordered_items_list($lp_id);
$user_id = api_get_user_id();
$stats_charset = $_SESSION['oLP']->encoding;
header('location: ../course_home/course_home.php?'.api_get_cidreq());
}
break;
default:
if($debug>0) error_log('New LP - default action triggered',0);
//$_SESSION['refresh'] = 1;
require('lp_list.php');
break;
}
if(!empty($_SESSION['oLP'])){
$_SESSION['lpobject'] = serialize($_SESSION['oLP']);
if($debug>0) error_log('New LP - lpobject is serialized in session',0);
}
?>

Source for file lp_controller.php