<?php //$id$
/**
* This script contains the server part of the xajax interaction process. The client part is located
* in lp_api.php or other api's.
* This is a first attempt at using xajax and AJAX in general, so the code might be a bit unsettling.
* @package dokeos.learnpath
* @author Yannick Warnier < ywarnier @ beeznest . org >
*/
/**
* Script
*/
//flag to allow for anonymous user - needs to be set before global.inc.php
$use_anonymous = true;
// name of the language file that needs to be included
$language_file[] = 'learnpath';
require_once('back_compat.inc.php');
/**
* Get one item's details
* @param integer LP ID
* @param integer user ID
* @param integer View ID
* @param integer Current item ID
* @param integer New item ID
*/
function switch_item_details($lp_id,$user_id,$view_id,$current_item,$next_item)
{
$debug=0;
$return = '';
if($debug>0){error_log('In xajax_switch_item_details('.$lp_id.','.$user_id.','.$view_id.','.$current_item.','.$next_item.')',0);}
//$objResponse = new xajaxResponse();
/*$item_id may be one of:
* -'next'
* -'previous'
* -'first'
* -'last'
* - a real item ID
*/
require_once('learnpath.class.php');
require_once('scorm.class.php');
require_once('aicc.class.php');
require_once('learnpathItem.class.php');
require_once('scormItem.class.php');
require_once('aiccItem.class.php');
$mylp = '';
if(isset($_SESSION['lpobject']))
{
if($debug>1){error_log('////$_SESSION[lpobject] is set',0);}
$oLP =& unserialize($_SESSION['lpobject']);
if(!is_object($oLP)){
if($debug>1){error_log(print_r($oLP,true),0);}
if($debug>2){error_log('////Building new lp',0);}
unset($oLP);
$code = api_get_course_id();
$mylp = & new learnpath($code,$lp_id,$user_id);
}else{
if($debug>1){error_log('////Reusing session lp',0);}
$mylp = & $oLP;
}
}
$new_item_id = 0;
switch($next_item){
case 'next':
$mylp->set_current_item($current_item);
$mylp->next();
$new_item_id = $mylp->get_current_item_id();
if($debug>1){error_log('In {next} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
break;
case 'previous':
$mylp->set_current_item($current_item);
$mylp->previous();
$new_item_id = $mylp->get_current_item_id();
if($debug>1){error_log('In {previous} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
break;
case 'first':
$mylp->set_current_item($current_item);
$mylp->first();
$new_item_id = $mylp->get_current_item_id();
if($debug>1){error_log('In {first} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
break;
case 'last':
break;
default:
//should be filtered to check it's not hacked
if($next_item == $current_item){
//if we're opening the same item again
$mylp->items[$current_item]->restart();
}
$new_item_id = $next_item;
$mylp->set_current_item($new_item_id);
if($debug>1){error_log('In {default} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
break;
}
$mylp->start_current_item(true);
if($mylp->force_commit){
$mylp->save_current();
}
//$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
if(is_object($mylp->items[$new_item_id])){
$mylpi = & $mylp->items[$new_item_id];
}else{
if($debug>1){error_log('In switch_item_details - generating new item object',0);}
$mylpi =& new learnpathItem($new_item_id,$user_id);
$mylpi->set_lp_view($view_id);
}
/*
* now get what's needed by the SCORM API:
* -score
* -max
* -min
* -lesson_status
* -session_time
* -suspend_data
*/
$myscore = $mylpi->get_score();
$mymax = $mylpi->get_max();
if($mymax===''){$mymax="''";}
$mymin = $mylpi->get_min();
$mylesson_status = $mylpi->get_status();
$mylesson_location = $mylpi->get_lesson_location();
$mytotal_time = $mylpi->get_scorm_time('js');
$mymastery_score = $mylpi->get_mastery_score();
$mymax_time_allowed = $mylpi->get_max_time_allowed();
$mylaunch_data = $mylpi->get_launch_data();
/*
if($mylpi->get_type() == 'asset'){
//temporary measure to save completion of an asset. Later on, Dokeos should trigger something on unload, maybe... (even though that would mean the last item cannot be completed)
$mylesson_status = 'completed';
$mylpi->set_status('completed');
$mylpi->save();
}
*/
$mysession_time = $mylpi->get_total_time();
$mysuspend_data = $mylpi->get_suspend_data();
$mylesson_location = $mylpi->get_lesson_location();
$myic = $mylpi->get_interactions_count();
$myistring = '';
for ($i=0;$i< $myic;$i++) {
$myistring .= ",[".$i.",'','','','','','','']";
}
if (!empty($myistring)) {
$myistring = substr($myistring,1);
}
//$objResponse->addScript(
$return .=
"score=".$myscore.";" .
"max=".$mymax.";" .
"min=".$mymin.";" .
"lesson_status='".$mylesson_status."';" .
"lesson_location='".$mylesson_location."';" .
"session_time='".$mysession_time."';" .
"suspend_data='".$mysuspend_data."';" .
"total_time = '".$mytotal_time."';" .
"mastery_score = '".$mymastery_score."';" .
"max_time_allowed = '".$mymax_time_allowed."';" .
"launch_data = '".$mylaunch_data."';" .
"interactions = new Array(".$myistring.");" .
"item_objectives = new Array();" .
"G_lastError = 0;" .
"G_LastErrorMessage = 'No error';";
//);
/*
* and re-initialise the rest
* -saved_lesson_status = 'not attempted'
* -lms_lp_id
* -lms_item_id
* -lms_old_item_id
* -lms_new_item_id
* -lms_been_synchronized
* -lms_initialized
* -lms_total_lessons
* -lms_complete_lessons
* -lms_progress_bar_mode
* -lms_view_id
* -lms_user_id
*/
$mytotal = $mylp->get_total_items_count_without_chapters();
$mycomplete = $mylp->get_complete_items_count();
$myprogress_mode = $mylp->get_progress_bar_mode();
$myprogress_mode = ($myprogress_mode==''?'%':$myprogress_mode);
$mynext = $mylp->get_next_item_id();
$myprevious = $mylp->get_previous_item_id();
$myitemtype = $mylpi->get_type();
$mylesson_mode = $mylpi->get_lesson_mode();
$mycredit = $mylpi->get_credit();
$mylaunch_data = $mylpi->get_launch_data();
$myinteractions_count = $mylpi->get_interactions_count();
$myobjectives_count = $mylpi->get_objectives_count();
$mycore_exit = $mylpi->get_core_exit();
//$objResponse->addScript(
$return .=
"saved_lesson_status='not attempted';" .
"lms_lp_id=".$lp_id.";" .
"lms_item_id=".$new_item_id.";" .
"lms_old_item_id=0;" .
"lms_been_synchronized=0;" .
"lms_initialized=0;" .
"lms_total_lessons=".$mytotal.";" .
"lms_complete_lessons=".$mycomplete.";" .
"lms_progress_bar_mod='".$myprogress_mode."';" .
"lms_view_id=".$view_id.";" .
"lms_user_id=".$user_id.";" .
"next_item=".$new_item_id.";" . //this one is very important to replace possible literal strings
"lms_next_item=".$mynext.";" .
"lms_previous_item=".$myprevious.";" .
"lms_item_type = '".$myitemtype."';" .
"lms_item_credit = '".$mycredit."';" .
"lms_item_lesson_mode = '".$mylesson_mode."';" .
"lms_item_launch_data = '".$mylaunch_data."';" .
"lms_item_interactions_count = '".$myinteractions_count."';" .
"lms_item_objectives_count = '".$myinteractions_count."';" .
"lms_item_core_exit = '".$mycore_exit."';" .
"asset_timer = 0;";
//);
//$objResponse->addScript("update_toc('unhighlight','".$current_item."');");
//$objResponse->addScript("update_toc('highlight','".$new_item_id."');");
//$objResponse->addScript("update_toc('$mylesson_status','".$new_item_id."');");
//$objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
$return .= "update_toc('unhighlight','".$current_item."');".
"update_toc('highlight','".$new_item_id."');".
"update_toc('$mylesson_status','".$new_item_id."');".
"update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');";
$mylp->set_error_msg('');
$mylp->prerequisites_match(); //check the prerequisites are all complete
if($debug>1){error_log('Prereq_match() returned '.htmlentities($mylp->error),0);}
//$objResponse->addScript("update_message_frame('".str_replace("'","\'",htmlentities($mylp->error))."');");
$return .= "update_message_frame('".str_replace("'","\'",api_htmlentities($mylp->error, ENT_QUOTES, api_get_system_encoding()))."');";
$_SESSION['scorm_item_id'] = $new_item_id;//Save the new item ID for the exercise tool to use
$_SESSION['lpobject'] = serialize($mylp);
return $return;
//return $objResponse;
}
echo switch_item_details($_GET['lid'],$_GET['uid'],$_GET['vid'],$_GET['iid'],$_GET['next']);
